highaltitude.log.20130329

[00:03] <Upu> right night all
[00:04] <KT5TK_QRL> gn Upu
[00:04] <chrisstubbs> Night!
[00:05] <fsphil> morning
[00:05] <chrisstubbs> howdy fsphil
[00:08] Hix (~Hix@78-105-32-132.zone3.bethere.co.uk) joined #highaltitude.
[00:08] <chrisstubbs> Hows it going Hix
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[00:19] <fsphil> trying to code but sleepy
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[00:19] <chrisstubbs> Have a few beers, that helps with coding
[00:21] <fsphil> hehe, doubtful
[00:24] <MichaelC> m0psi: When you wake up (or if your still up), What sort of higher quality antenna could we use that is still quite lightweight?
[00:24] <arko> anyone have a second to check my math?
[00:24] <Randomskk> maybe
[00:24] <Randomskk> what math?
[00:24] <arko> very easy
[00:25] <arko> battery life
[00:25] <arko> i just cant believe the number
[00:25] <arko> 14.4v source
[00:25] <arko> draws 0.04A while idle for 119seconds
[00:25] <arko> then draws 0.34A for one second as it transmits
[00:25] <arko> then repeats that
[00:26] <arko> it's 8 AA lithium ion batteries
[00:26] <arko> so approx 3000mAh battery
[00:27] <arko> im getting a number thats a few days
[00:27] <arko> 70.58 Hours
[00:27] <Hix> yo! my pathetic effort to do our wee satellite friend some justice http://goo.gl/uXnVN
[00:28] <arko> nice! what's the scope?
[00:28] <Hix> WO 80ED operated by a drunken fool
[00:28] <Randomskk> arko: that seems fine to me. I just did the same maths and get the same result
[00:29] <arko> sweet!
[00:29] <arko> thanks dude, very much appricated
[00:29] <Randomskk> (.04*119 + .34*1)/120 gives .0425A average current
[00:29] <arko> yep!
[00:29] <chrisstubbs> Hix cool :)
[00:29] <arko> then 3/0.0424
[00:29] <Randomskk> 3Ah/.0425A gives 71 hours
[00:29] <Hix> room for improvement
[00:29] <arko> i mean 0.0425
[00:29] <arko> cool
[00:29] <arko> we just apollo 13 math checked
[00:29] <arko> thanks again Randomskk!
[00:30] <Randomskk> np
[00:30] <Hix> hey chrisstubbs how goes?
[00:30] <chrisstubbs> Randomskk, i removed my PCB groundplane (using methods i wont talk about here)
[00:30] <Hix> wire wool
[00:30] <chrisstubbs> and it worked again :)
[00:30] <Randomskk> chrisstubbs: great :D
[00:30] <Randomskk> did it involve a dremel or a sharp knife?
[00:31] <chrisstubbs> Hix soldering iron gouge method
[00:31] <Randomskk> ouch
[00:31] <Hix> nice
[00:31] <chrisstubbs> i have an old iron i use for stuff like that dont worry
[00:31] <Hix> pikey, but effective ;p
[00:31] <Hix> butcher ;p
[00:31] <m0psi> michaelc, there are helical antennae that we could explore. But we could try the 1/4 wave again, but do some SN (signal to noise) tests on it before hand
[00:32] <chrisstubbs> Yeah its putting out NMEA data fine, and you get a couple of satalites in blue in u-center but no fix!
[00:32] <Randomskk> give it time
[00:33] <chrisstubbs> its had a good hour and a bit
[00:33] <Hix> I NEED cheese on toast
[00:33] <Hix> with HP / Chef sauce
[00:33] <MichaelC> m0psi: hm ok. I think with WASP-2 we should certianly do more sort of researchy stuff on how to get it to get higher/radio strength etc. and due to more time this will be a lot easier. When will the radio course you were going to organise be?
[00:34] <chrisstubbs> Hix sausage and hash brown sandwich + HP sauce
[00:34] <chrisstubbs> gets me through the day
[00:34] <Hix> wrongun
[00:34] <chrisstubbs> LMAO
[00:34] <chrisstubbs> oh dear
[00:34] <Hix> sausages and mash
[00:34] <Hix> not hash brown.
[00:35] <Hix> Ever
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[00:35] <Hix> gemme
[00:35] <chrisstubbs> a comma in that statment would have helped
[00:36] <m0psi> michaelc, i think we'll have to do that in july. ran out of time. i'm off away for a while
[00:36] <chrisstubbs> anyway.... http://youtu.be/Ry5unnhz5FI
[00:36] <Hix> like i ca nbe bothered atm. I've had a gutfull and been out in the cld trying to take pics of a big balll o'cheese
[00:37] <MichaelC> m0psi: ok. When are you off?
[00:38] <chrisstubbs> Hmm RTTY seems to have stopped, just a CW now. Leaving the tracker out in the snow with alkalines has killed it :P
[00:38] <m0psi> tues to scotland
[00:38] <m0psi> then 20th april to dubai
[00:39] <MichaelC> Righty. So you won't be attending the assemblies etc? We'll sure to mention you as the person who made it all happen. :)
[00:39] <m0psi> :-)
[00:39] <m0psi> i would love a video recording
[00:40] <m0psi> see if you can swing that for me
[00:40] <MichaelC> I'll see what I can do. :)
[00:40] <m0psi> ta
[00:41] <m0psi> btw, did you like the graphs i just sent you?
[00:41] <MichaelC> yeah. Only had a brief look (too late to do some number crunching)
[00:42] <m0psi> sure, lots of play in them numbers matey! :-)
[00:42] <MichaelC> Nathan is the school mathmatical genuis so i'm sure he'll so some extra number crunching if nobody else does
[00:42] <m0psi> great. get him on them numbers
[00:42] <m0psi> he'll love it
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[00:43] <MichaelC> Yup. I just dropped him an email with regards to it. Would be good to include them in the presentation (as long as your average 11 - 15 year old can understand it and is presented in an excitable format).
[00:49] <m0psi> the skill is 'including' people of all ages, not throwing complexity :-) in other words, what would you need to do to excite them and allow them to take something away, other than confusion :-)
[00:49] <m0psi> they say, if you can't explain it simply, you don't understand it.
[00:49] <m0psi> apparently Einstien said that
[00:50] <m0psi> you'll do well with this Michael. Enjoy!
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[00:59] Action: Hix has cheese on toast, also two strangely obidient dogs too all of a sudden
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[01:22] <Spoz> I like the variation, "you never properly understand something until you can explain it to your grandmother"
[01:36] <arko> 03/066 - AIRSPACE HIBAL TNP270005 ENE BND REACHING FL102. 30 MAR 17:00 2013 UNTIL 30 MAR 18:00 2013. CREATED: 29 MAR 01:02 2013
[01:36] <arko> woot! NOTAM issued
[01:40] <bubbu> what airspace? Canadian or American
[01:41] <arko> american
[01:41] <arko> mojave areaish
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[03:06] <bubbu> What do I need exactly to track something via APRS on a transmitting end? What kind of radio, what kind of GPS, other essentials?
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[03:20] <SpeedEvil> bubbu: whrer are you?
[03:22] <bubbu> Ontario
[03:35] <bubbu> thoughts on micro tak?
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[04:03] <arko> im testing mine right now
[04:03] <arko> :)
[04:04] <arko> http://wiki.032.la/nsl/HABEX2#Tracking_Radio_Alpha
[04:04] <arko> check out the circuit analysis
[04:04] <arko> if you do get the micro-trak, i recommend removing the 12v regulator
[04:07] <bubbu> this is a lot simpler than I thought. Let me get this right. You need a GPS receiver and a radio in your payload with power source, radio transmits signal to ground based receiver (Ham radio) or digi, goes to igate which goes to online representation such as aprs.fi
[04:08] <bubbu> am i getting this straight
[04:09] <bubbu> why remove the 12v reg
[04:10] <arko> ok
[04:10] <arko> so you should buy the high altitude version btw
[04:10] <arko> the gps it comes with can do above 60,000ft
[04:10] <arko> so if you use 8 AA lithuim's
[04:10] <bubbu> transmitter and gps all in one
[04:11] <arko> they come out to about 14.4v at full charge and will go down below 12v, below 12v the regulator shuts off
[04:11] <bubbu> then what? everything switches off?
[04:11] <arko> yeah
[04:11] <bubbu> so why put the regulator in the fiurst place then
[04:11] <arko> so by removing it you just need to make sure you dont go above 15v
[04:12] <bubbu> does that mean less batteries?
[04:12] <arko> because people could attach 24v batteries or what not
[04:12] <arko> yeah
[04:12] <arko> since you dont need to stack as much to get a higher voltage
[04:12] <arko> removing the 12v reg makes the operating voltage range: 8v - 15v
[04:12] <bubbu> okay... is there a cheaper all in one than the microtak
[04:13] <arko> which one
[04:13] <arko> ?
[04:13] <bubbu> Micro-Trak AIO w/ V2 rubber duck antenna - $260.
[04:13] <arko> i believe the gps on that has the 60,000ft cut off
[04:14] <bubbu> Micro-Trak AIO HA - $320.
[04:15] <arko> oh look at that
[04:15] <arko> didn't know they had that
[04:15] <arko> it's practically the same exact circuit
[04:15] <arko> i like the micro-trak since you can move the gps antenna around
[04:16] <bubbu> Byonics GPS4 - $79 works up to 84km
[04:17] <KF7FER> bubbu: you going to fly fairly soon or just looking?
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[04:18] <arko> yeah, thats the gps that comes with the micro-trak rtg ha
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[08:07] <Spoz> woohoo, all set for launch tomorrow, with hours to spare!
[08:07] <Spoz> I might actually get some sleep tonight too
[08:11] <jcoxon> Spoz, where you launching from?
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[08:18] <costyn> jcoxon: somewhere in Australia :)
[08:19] <jcoxon> oh cool
[08:19] <jcoxon> shame i can't listen...
[08:20] <costyn> jcoxon: it's at 1:00 UTC, so not sure you'd want to :)
[08:20] <jcoxon> its a 4 day weekend in the UK
[08:20] <costyn> arko: when is yours going up?
[08:20] <jcoxon> no work
[08:20] <jcoxon> hooray
[08:20] Action: costyn is at work
[08:21] <costyn> today isn't a public holiday, only monday
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[08:24] <eroomde> no work either
[08:24] <eroomde> bed
[08:25] <eroomde> been a mad 3 weeks
[08:25] <jcoxon> eroomde, same
[08:27] <eroomde> might move soon for brunch out somewhere
[08:27] <eroomde> might
[08:27] <eroomde> jcoxon: you've probably just been saving people's lives
[08:27] <jcoxon> bbl
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[08:43] <Willdude123> Morning guys.
[08:44] <x-f> morning
[08:44] <Upu> sup Willdude123
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[08:58] <arko> costyn: this saturday at 1700 utc
[08:58] <arko> Morning willdude123
[08:59] <arko> Suup eroomde
[08:59] <eroomde> suup arko
[08:59] <eroomde> i am in bed
[08:59] <costyn> arko: cool
[08:59] <eroomde> thinking about brunch
[09:00] <eroomde> v happy
[09:00] <arko> eroomde: lol same, exhausted from finishing up habex. Thinking about sleeping now
[09:00] <eroomde> i slept well last night
[09:00] <eroomde> went for a steak to celebrate giving birth to the pressure logger
[09:00] <arko> Busy busy?
[09:00] <arko> Hahaha
[09:01] <eroomde> 3.5 weeks from git init to finished
[09:01] <arko> Nice :)
[09:01] <arko> Good test results?
[09:01] <eroomde> oh we haven't used it on an engine yet :)
[09:01] <Willdude123> eroomde: I'm in bed too.
[09:01] <arko> Bah!
[09:01] <arko> Calibrate it?
[09:01] <eroomde> this is just the idea/design/fab/solder process
[09:02] <arko> Very cool
[09:02] <arko> Rapid dev is fun
[09:02] <Willdude123> It'd be a capital crime to get out of bed at this time on the first day of the Easter break.
[09:02] <eroomde> Willdude123: it's thebest place on good friday
[09:02] <eroomde> arko: the sensor come precalibrated
[09:02] <arko> Oh sweet
[09:02] <eroomde> and everything else is desgined to be 0.1% accurate by design
[09:02] <eroomde> i hate calibrating
[09:03] <costyn> bah all you bedloungers... I'm at work :(
[09:03] <eroomde> it's a very manual, difficult to scle process
[09:03] <eroomde> costyn: it's good friday! it's ok to be releigious when it gives you days of work
[09:03] <arko> Yeah makes sense
[09:03] <costyn> eroomde: hehehe
[09:04] <Upu> haha
[09:04] <Upu> as I left on Friday someone wished me "Happy zombie jew on a stick day"
[09:04] <arko> glad to hear its been successful! No wonder you havent been around as much
[09:04] <arko> Lol
[09:04] <costyn> Upu: lol
[09:05] <eroomde> arko: mmm, lots of long days. wanted to get it done by easy
[09:05] <eroomde> so we can comission it into the rig after easy with the new engine going on
[09:05] <costyn> Upu: just set the /topic on my work irc channel to that :)
[09:05] <Upu> lol
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[09:06] <PE2G> Hi, any SondeMonitor users here?
[09:06] <costyn> Upu: apparently jesus wasn't a zombie but a lich, so a collegue tells me http://www.buzzfeed.com/donnad/jesus-was-not-a-zombie
[09:07] <arko> I think i laughed more at the "jesus sightings in review, 2009"
[09:07] <arko> Like hes yeti
[09:11] <Upu> morning Wouter
[09:16] <arko> Time to sleep.. tomorrow we heasd to the desert
[09:16] <arko> Head*
[09:16] <Spoz> same here!
[09:16] <Spoz> seeya
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[09:30] <M0TVU> Good moaning
[09:30] <costyn> desert... strange concept here in western europe
[09:31] <jonsowman> dessert, not so much
[09:31] <costyn> indeed
[09:31] <M0TVU> I have my little homebrew pic transmitter sending rtty with a checksum. I can see it in dl-fldigi. How can I get it displayed on spacenear for testing?
[09:31] <costyn> M0TVU: make sure you have your callsign filled in in dl-fldigi
[09:32] <M0TVU> I do
[09:32] <costyn> M0TVU: then dl-fldigi should be 'online' and uplaoding strings
[09:32] <M0TVU> and I can see an antenna where I live
[09:32] <costyn> M0TVU: ok good.. are you are getting green decodes in dl-fldigi?
[09:32] <M0TVU> I am failing the checksum - although the checksum checks correct.
[09:32] <M0TVU> Do I have to have the exact protocol
[09:32] <costyn> it won't upload failed checksums
[09:33] <M0TVU> Makes sense
[09:33] <costyn> i'm afraid there's still a probem with the checksum then
[09:33] <fsphil> M0TVU: did you remember to not include the $ and * characters in the checksum?
[09:33] <M0TVU> yes
[09:33] <fsphil> copy one of the strings here
[09:34] <M0TVU> Check sum is right. I think it's just down to protocol now
[09:34] <costyn> M0TVU: could be the format of the string
[09:34] <costyn> M0TVU: paste it here
[09:34] <M0TVU> $$M0TVU,093343.0,5233.738,N,00153.800,W,1,7,1.40,00182,M,048,M,,,,*ACB1
[09:34] <M0TVU> It's the N and W and the fact that I haven't converted the lat and long I think
[09:35] <fsphil> the crc for that should be 2088
[09:35] <M0TVU> be careful with those zeros
[09:36] <jonsowman> M0TVU: you're missing the final comma
[09:36] <fsphil> good spot jonsowman
[09:36] <jonsowman> M0TVU,093343.0,5233.738,N,00153.800,W,1,7,1.40,00182,M,048,M,,, has checksum ACB1
[09:36] <jonsowman> add the final comma and you get 2088 (which is correct)
[09:36] <M0TVU> Hmmmmm
[09:36] <M0TVU> interesting
[09:37] <M0TVU> Bugger!
[09:37] <jonsowman> check your buffer pointers :)
[09:37] <M0TVU> Yeah I was just thinking that
[09:37] <jonsowman> fsphil: happens a lot :)
[09:37] <M0TVU> I hink I know what it is
[09:37] <M0TVU> think even
[09:37] <M0TVU> If I correct that - should it work?
[09:38] <jonsowman> yep
[09:38] <M0TVU> even though the protocol isn't technically right
[09:38] <costyn> M0TVU: well since you're getting a correct checksum for the string without the , it should work yea
[09:38] <jonsowman> you should get a 'green' decode and it will upload
[09:38] <M0TVU> lovely jubbly
[09:38] <M0TVU> back in a bit
[09:38] <costyn> M0TVU: habitat might not accept/be able to parse the string though
[09:38] <fsphil> now it probably won't display it on the map if you haven't made a payload document -- although that's really easy if you haven't
[09:38] <jonsowman> M0TVU: i would suggest you then format N/W correctly into signs though
[09:39] <jonsowman> but sort out the checksum first :)
[09:39] <M0TVU> Yeah checksum first the rest is just manipulation
[09:39] <jonsowman> yep
[09:42] <M0TVU> Oooh lovely
[09:42] <M0TVU> GREEN
[09:42] <jonsowman> :D
[09:42] <fsphil> love it when that happens
[09:42] <costyn> M0TVU: noice!
[09:44] <M0TVU> I'm getting closer everyday. The checksum code was a nightmare to be honest - Took me a long time to get my head around it.
[09:44] <jonsowman> satisfying when you get it working though
[09:44] <M0TVU> So fsphil how do I complete the payload document thingy
[09:45] <M0TVU> Very jonsowman
[09:45] <M0TVU> even better when you really understand how and why
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[09:45] <jonsowman> definitely
[09:45] <costyn> M0TVU: go to habitat.habhub.org for the payload doc
[09:46] <costyn> M0TVU: click on 'genpayload'
[09:46] <costyn> M0TVU: then create new
[09:46] <M0TVU> Do you know this all started because I bought a Lassen Trimble SK8 GPS from a radio rally for £1
[09:47] <fsphil> small moves, ellie, small moves
[09:47] <fsphil> I mean, M0TVU
[09:49] <m0psi> :-)
[09:50] <Upu> lol
[09:50] <M0TVU> Do I just copy my string into the sentence wizard?
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[09:54] <M0TVU> .
[09:55] <costyn> M0TVU: i've not used it, but try it :)
[09:55] <costyn> M0TVU: can be useful to look at other people's payload docs for examples
[09:57] <fsphil> you paste it in, then tell it what each field means
[10:01] <Hix> speaking of payloadgen, I've created a fligh doc, and can see it in dlfldigi under all payloads (testing) but when i select it, it doesnt keep the change.
[10:01] <Hix> any ideas?
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[10:04] <ibanezmatt13> Good Morning :)
[10:05] <jonsowman> morning
[10:05] <fsphil> speaking of morning, time I got out of bed
[10:05] <fsphil> yay holidays
[10:05] <ibanezmatt13> With help from Randomskk, I have managed to write a little python code for reading a Ublox GPS module and sending it to an NTX2 transmitter. All of this is done using a Raspberry Pi's hardware serial. https://gist.github.com/ibanezmatt13/5267671 lovely weather
[10:06] <ibanezmatt13> :)
[10:06] <fsphil> hah
[10:06] <fsphil> nice
[10:06] <cuddykid> end of next week looking better for a flight opportunity :)
[10:07] <M0TVU> Ok dl-fldigi is Green - Payload document created - next step / configuration?
[10:07] <M0TVU> Nothing showing on sacenear
[10:07] <M0TVU> spacenear
[10:07] <costyn> Hix: which change do you mean?
[10:07] <costyn> M0TVU: http://habitat.habhub.org/logtail/ there's an error message
[10:07] <fsphil> M0TVU: this page is very useful when debugging it,
[10:08] <Hix> costyn: selecting flight for dl-fldigi, can see it but can't actually set it
[10:08] <fsphil> costyn beat me to it :)
[10:08] <costyn> Hix: what's the name of it?
[10:08] <jonsowman> M0TVU: your coordinates are still not in the standard ukhas format
[10:09] <M0TVU> I know - I was just trying to see if it would work
[10:09] <Hix> costyn: Hix_Hab
[10:09] <M0TVU> Ok, i'll change the sentence
[10:09] <costyn> Hix: works for me... it changed it to 50 baud 520 shift
[10:09] <M0TVU> BTW what is the use of the sentence ID?
[10:09] <costyn> M0TVU: it's just a counter that should increasee
[10:09] <Hix> hmm, restart methinks
[10:10] <Hix> cheers costyn
[10:10] <M0TVU> Yeah but for what reason?
[10:10] <jonsowman> M0TVU: two issues
[10:10] <jonsowman> "latitude": 5233.738,
[10:10] <jonsowman> it's trying to interpret that as dd.ddddd
[10:10] <jonsowman> so the integer part can't be >90
[10:10] <jonsowman> second, your times are like "101003.0"
[10:10] <jonsowman> which it doesn't understand
[10:11] <jonsowman> 10:10:03 is usual
[10:11] <costyn> M0TVU: not exactly sure, but I think habitat expects it to increase (jonsowman please correct me if not)
[10:11] <jonsowman> though iirc, habitat will understand 101003
[10:11] <M0TVU> ok i'll do some work on the sentence
[10:11] <M0TVU> back in a bit
[10:11] <M0TVU> Thank you
[10:12] <jonsowman> M0TVU: sentence id uniquely identifies a sentence, it's there really so that if you lose gps lock (so no time or position), you can continue transmitting last known or whatever
[10:12] <jonsowman> we could do without it, but it's become very standard
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[10:15] <ibanezmatt13> i am trying to request a GPGGA sentence from the GPS. http://aprs.gids.nl/nmea/#gga I know that in python, the 1st element of a string would be the sentence identifier (gpgga), the next element would be time, then gps lock and so on. Where does altitude come into the string?
[10:15] <ibanezmatt13> in fact scratch that, i've realised the issue
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[10:18] <ibanezmatt13> daveake: good morning :(
[10:18] <ibanezmatt13> :)
[10:18] <ibanezmatt13> sorry, wrong button
[10:18] <daveake> gm
[10:19] <ibanezmatt13> https://gist.github.com/ibanezmatt13/5267671
[10:19] <ibanezmatt13> i've been writing, with some help from Randomskk, my own python code
[10:19] <daveake> ah cool. About time I learnt Python :)
[10:20] <ibanezmatt13> only problem is, i have been looking at this http://aprs.gids.nl/nmea/#gga
[10:20] <ibanezmatt13> i wish to use the GPGGA string
[10:20] <daveake> ok good
[10:20] <costyn> ibanezmatt13: nice, it's very readable and simple. seems easier than the C code needed to parse it all
[10:20] <ibanezmatt13> The only issue is, I can't work out how to get the altitude
[10:20] <daveake> indeeed python does make a lot of stuff a lot easier
[10:21] <ibanezmatt13> i was looking at that website http://aprs.gids.nl/nmea/#gga
[10:21] <ibanezmatt13> after splitting the sentence up by doing data.split(",") which splits it by commars
[10:21] <ibanezmatt13> i checked that data[0] was gpgga
[10:21] <ibanezmatt13> i checked that data[2] was not equal to a, i believe that an a means that there is no lock
[10:22] <ibanezmatt13> but I don't know which data[?] altitude is
[10:22] <daveake> Just count the elements in the description of GPGGA
[10:22] <costyn> ibanezmatt13: or just print them all out to debug and see?
[10:22] <lz1dev> they tell you the index on the page?
[10:23] <daveake> Makes it easier still :)
[10:23] <ibanezmatt13> according to that website, data[2] would be latitude, but we worked it out yesterday to be the gps lock test
[10:23] <jonsowman> ibanezmatt13: data[2] is lock test for $GPRMC
[10:23] <jonsowman> not $GPGGA
[10:23] <jonsowman> http://aprs.gids.nl/nmea/#rmc
[10:24] <ibanezmatt13> ah, i see. I've been looking at the wrong one. I see now, thanks. I'll change that now
[10:24] <ibanezmatt13> cheers
[10:25] <jonsowman> RMC doesn't include altitude, so you might need to parse GGA as well for that
[10:25] <ibanezmatt13> so which is the satellite lock for gpgga? would it be data[3]
[10:25] <ibanezmatt13> ?
[10:25] <ibanezmatt13> http://aprs.gids.nl/nmea/#gga
[10:25] <daveake> btw I wouldn't use that "continue". It'll get you in trouble
[10:25] <jonsowman> [4] if anything
[10:25] <jonsowman> [3] is longitude
[10:26] <ibanezmatt13> i thought the frst element was 0?
[10:26] <ibanezmatt13> dat[0]
[10:26] <jonsowman> it is
[10:26] <ibanezmatt13> daveake: trouble?
[10:26] <jonsowman> [0] is gpgga, [1] is time, [2] is lat, [3] is long
[10:26] <daveake> Well, look to see where execution goes to from that point
[10:26] <jonsowman> [4] is "fix quality"
[10:26] <costyn> ibanezmatt13: better to always send the string, not only if you have a lock
[10:26] <daveake> The answer is "bottom of the loop"
[10:26] <ibanezmatt13> i see, i misounted,thnks jonsowman
[10:26] <daveake> thus skipping gps.close()
[10:27] <daveake> So you'll be re-opening gps every time round the loop, which may be an issue.
[10:27] <daveake> Better anyway to open GPS once, before the loop
[10:27] <ibanezmatt13> wat happens when i reopen it as radio
[10:27] <ibanezmatt13> ?
[10:28] <daveake> But my point is it's much clearer/safer to do if=then-elseif, or a case statement, rather than jumping around with "continue"
[10:28] <ibanezmatt13> ok thanks daveake
[10:28] <daveake> Ah yeah you need to reopen I forgot you were using my trick :p
[10:28] <ibanezmatt13> so i need to open the gps before the loop, so i still open the radio in the loop?
[10:29] <daveake> So, your code needs to tdo gps.open ... gps.close ... each time round the loop. The continue skips the close
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[10:29] <ibanezmatt13> i see, i didn't know that :\ thanks
[10:29] <ibanezmatt13> so i still need to do gps.open() gps.close() radio,.open() radio.close() every loop?
[10:30] <ibanezmatt13> and get rid of continue
[10:31] <daveake> Yes you need to open at 9600, loop till you've got a position, then close the port re-open at 300 and transmit your position.
[10:31] <ibanezmatt13> ok, i'll modify the code now
[10:31] <daveake> Before you do ...
[10:32] <daveake> Note that at the moment your code hopes to get the GGA sentence in one attempt. It might get a different sentence. So the GPS part of the code may finish without a new position, so you'd then send the previous position over the radio
[10:33] <ibanezmatt13> ok, but won't it pause at that if statement until it gets a gpgga?
[10:33] <daveake> At present no it won't
[10:33] <ibanezmatt13> oh, i see
[10:33] <ibanezmatt13> because it's reading every loop...
[10:34] <daveake> Now, if yuo configure the GPS to *only* send GGA sentences, then that might be a reasonable assumption, but by default the UBlox send about 5 different ones IIRC
[10:34] <jonsowman> correct
[10:34] <costyn> so how does the readline() work... does it grab everything up till a newline?
[10:34] <ibanezmatt13> how do we avoid this issue?
[10:34] <daveake> I'd simplify the main loop into just 2 lines. First would be a function call to "Go get a new GPS position"; second "Transmit this position"
[10:34] <costyn> ibanezmatt13: you can send some data to the gps to disable other sentences
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[10:35] <daveake> Then the first function would listen to sentences until it gets a position, then decodes and returns. Best if it has a timeout too in case the GPS stops sending data
[10:35] <ibanezmatt13> i see, so i'll create two functions and costyn is there a good way of doing this in python?
[10:35] <ibanezmatt13> i'll timeout for 1 second
[10:35] <jonsowman> costyn: reads until \n
[10:35] <costyn> ibanezmatt13: https://github.com/costyn/habanero/blob/master/habanero.pde#L260 it's just a few sentences in ascii
[10:35] <costyn> jonsowman: thx
[10:36] <daveake> ser.readline() presumably does exactly that?
[10:36] <costyn> ibanezmatt13: but that function turns them all off because we are polling the gps
[10:36] <ibanezmatt13> costyn: so which one of them commands will i need to use to disable everything minus gpgga
[10:37] <costyn> ibanezmatt13: all of them except the one that says GGA :)
[10:37] <ibanezmatt13> of course, thanks
[10:37] <ibanezmatt13> I'll now modify the code with all this new knowledge and get back to you shortly
[10:37] <daveake> GGA sends all the essentials, so turning everything else off is a good plan
[10:38] <daveake> I also use RMC as it sends speed and direction and I usually Tx those too
[10:38] <ibanezmatt13> so in c, serial.println, is that the same as serial.write(
[10:38] <costyn> daveake: yea I have to try that one on my next payload
[10:38] <daveake> But in the interests of KISS just use GGA
[10:38] <jonsowman> they weren't thinking about when they forget to include altitude in the so called "Recommended Minimum Commit" huh
[10:38] <daveake> costyn it's handy when you're chasing :)
[10:38] <costyn> hehe
[10:38] <daveake> jonsowman lol indeed
[10:39] <costyn> daveake: when it's going 180 you know you have to drive faster? :)
[10:39] <daveake> yup btdt
[10:39] <costyn> :D
[10:39] <daveake> Doing "Mrs Dave motorway speeds" down to the chunnel, and the balloon was doing double that
[10:39] <ibanezmatt13> is serial.println in c the same as serial.write in python?
[10:39] <Geoff-G8DHE_> Is the tracker down ?
[10:39] <costyn> daveake: with Tim's when it was doing 180 into east Germany we knew we could turn around :)
[10:40] <daveake> You don't need println for the UBX commands they are binary so no need for the line-feed
[10:40] <costyn> ibanezmatt13: it writes to serial, so I'm guessing yes
[10:40] <jonsowman> ibanezmatt13: broadly speaking, yes
[10:40] <jonsowman> though .println adds a newline iirc
[10:40] <ibanezmatt13> so do i at the start of the loop say serial.write("$PUBX,40,GLL,0,0,0,0*5C") but for all of these except gga?
[10:40] <daveake> seems likely from the name :)
[10:40] <costyn> ibanezmatt13: yep
[10:41] <daveake> yes
[10:41] <costyn> ibanezmatt13: well no
[10:41] <ibanezmatt13> briliant, thanks alot
[10:41] <costyn> ibanezmatt13: you only have to do it once
[10:41] <ibanezmatt13> :D
[10:41] <daveake> "before" start of loop, :)
[10:41] <ibanezmatt13> oh, I see. At the start of the program
[10:41] <ibanezmatt13> of course, cheers
[10:41] <costyn> ibanezmatt13: yes
[10:41] <daveake> I thnk I need to write a Python tracker just for the exercise
[10:42] <costyn> daveake: doesn't look very hard seeing ibanezmatt13's code :)
[10:42] <daveake> and see how much shorter than C it is
[10:42] <costyn> yea
[10:42] <daveake> Indeed. Lots of pain missing :)
[10:43] <ibanezmatt13> https://gist.github.com/ibanezmatt13/5267671
[10:43] <Randomskk> I reckon ten lines tops
[10:43] <daveake> My original Pi tracker code was just my Arduino code with minor changes
[10:43] <Randomskk> maybe eight
[10:43] <ibanezmatt13> is the bit i've modified correct?
[10:43] <costyn> Randomskk: lol
[10:43] <daveake> I was thinking more like, er, 9
[10:44] <costyn> ibanezmatt13: I would remove the line where you don't send anything ifyou odn't have a lock; it's useful to know your payload is sending stuff and working even if it doesn't have a lock
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[10:44] <daveake> indeed
[10:44] <costyn> ibanezmatt13: just put the lock status as part of your string
[10:44] <ibanezmatt13> I'll do that costyn
[10:45] <ibanezmatt13> do i need more of them write commands to disable any more sentences?
[10:45] <costyn> ibanezmatt13: no, looks good
[10:45] <ibanezmatt13> great, thanks :)
[10:45] <costyn> ibanezmatt13: maybe include a time.sleep after the commands to wait for the gps to catch up
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[10:45] <costyn> ibanezmatt13: before you start querying it
[10:46] <ibanezmatt13> good idea, I'll do that
[10:46] <costyn> although since readline is waiting for it anyways it won't matter much
[10:49] <ibanezmatt13> https://gist.github.com/ibanezmatt13/5267671 i know it's messy but I'm going to condense it into functions in a minute. https://gist.github.com/ibanezmatt13/5267671 I've created a 'lock' variable to that it sends anyway but I know if it's locked or not
[10:50] <costyn> ibanezmatt13: well condense it first, this is making me cringe :)
[10:51] <daveake> yeah you don't need to repeat everything
[10:51] <daveake> you don't need to repeat everything
[10:51] <ibanezmatt13> ok, it's pretty simple really. It's just the same code for the loop but a different circumstance. I'll change it now
[10:51] <ibanezmatt13> :)
[10:52] <ibanezmatt13> thanks for the help everyone, I do appreciate it. I'm gonna sign off now and get a cup of tea and rewrite the code a little
[10:52] <ibanezmatt13> cheers, have a nice dat
[10:52] <ibanezmatt13> day
[10:52] <costyn> ibanezmatt13: cya
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[12:19] <Babs> Afternoon all - I've got my tracker transmitting and receiving correctly on dlfl-digi transmitting the string $$BABSHAB,160,12:18:55,52.77361,-2.41984,133,0,8,3278*32A3, I can see myself on spacenear (BABSTEST) but it isn't updating to my current location
[12:19] <Babs> can anyone help?
[12:21] <costyn> Babs: how long has dl-fldigi been online?
[12:21] <costyn> Babs: it can take a while to update your antenna tower icon
[12:21] <mattbrejza> http://habitat.habhub.org/genpayload/
[12:21] <mattbrejza> you need to tell habitat the format of your string Babs
[12:22] <costyn> Babs: but your payload is on spacenear, but not at the correct location?
[12:23] <jonsowman> BABSTEST is on spacenear
[12:23] <costyn> mattbrejza: it's sitting right in the middle of London, looks like it's parsing ok
[12:23] <jonsowman> that telemetry is from BABSHAB
[12:23] <jonsowman> habitat.parser MainThread: No configuration doc for 'BABSHAB' found
[12:23] <costyn> ah
[12:23] <Babs> I'm sitting in Shropshire, so I need to go to http://habitat.habhub.org/genpayload/ and fill in the sample string etc?
[12:24] <jonsowman> Babs: what is BABSTEST?
[12:24] <costyn> there's some payload naming confusion :)
[12:25] <Willdude123> In https://gist.github.com/ibanezmatt13/5267671 wouldn't it be quicker if the serial definition was outside the loop.
[12:25] <Willdude123> Oh he's gone.
[12:25] <costyn> Willdude123: he's using a trick where he uses serial to talk to the GPS *and* the radio
[12:26] <costyn> Willdude123: that's why he has to reconnect every time with a different baud rate
[12:26] <Willdude123> Oh.
[12:26] <costyn> sharing the hardware serial between 2 devices. bit hacky but it works
[12:27] <Willdude123> He could do what Dave did.
[12:27] <Willdude123> With an arduino.
[12:27] <costyn> Willdude123: this was wat Dave did on his Pi I believe
[12:28] <mattbrejza> you can also use a resistor and another gpio to disable the gps serial in when transmitting over the radio
[12:28] <jonsowman> Babs: is your tracker BABSTEST or BABSHAB?
[12:28] <Babs> BABSTEST jonsowman
[12:28] <Babs> apologies, its BABSHAB
[12:28] <jonsowman> Babs: ok, the telemetry you pasted above came from BABSHAB
[12:28] <jonsowman> right ok
[12:28] <jonsowman> so there is no payload config document for BABSHAB
[12:28] <Willdude123> Like the arduino could send a request to the GPS for data, and then the arduino could send the GPS data to the pi.
[12:29] <costyn> Babs: so you changed the name of the payload from BABSTEST to BABSHAB and BABSHAB isn't showingup
[12:29] <jonsowman> which is why habitat is rejecting telemetry
[12:29] <jonsowman> you need to generate a new payload config document
[12:29] <costyn> Willdude123: this is simpler :)
[12:29] <jonsowman> Babs: http://habitat.habhub.org/genpayload
[12:29] <jonsowman> then you should be golden
[12:30] Nick change: MichaelC1 -> MichaelC
[12:30] <Babs> ahh ok, just done that now. does it need any further approvals or should it automatically parse through the spacenear now?
[12:30] <jonsowman> that's all that's required
[12:30] <jonsowman> it should appear on spacenear now
[12:32] <Babs> OK thanks jonsowman, I'll give it a a few minutes and see whether it pops up.
[12:33] <lz1dev> Babs: it should be almost instant
[12:33] <lz1dev> http://habitat.habhub.org/logtail/
[12:33] <lz1dev> check here for errors
[12:33] <jonsowman> Babs: habitat is saying checksum invalid
[12:33] <costyn> i'm seeing babshab on the tracker now
[12:33] <costyn> at the correct location
[12:33] <jonsowman> yep, it parsed one
[12:34] <jonsowman> there are still a lot of checksum errors though
[12:34] <jonsowman> [2013-03-29 12:34:42,365] INFO habitat.parser MainThread: Parsing [ascii] '$$BABSHAB,238,12:34:31,52.77362,-2.4987,133,0,9,3278*2E54\n' (66c67f9df4c054b74ce2c649b20e74bf79b395f9803b472552bed4e2c8b76452) from M6HBA
[12:35] <jonsowman> that was checksum invalid
[12:36] daveake (~daveake@host81-129-97-205.range81-129.btcentralplus.com) joined #highaltitude.
[12:37] <Babs> Bingo - thanks jonsowma and costyn, its up on spacenear at the bottom - i really appreciate it. I've got it out in the garden now and need to hook up the antenna properly which is probably what is causing the errors. Now going out with a mate to climb the wrekin with him a few miles away in line of sight to see whether he can pick it up
[12:38] <jonsowman> there's still something not quite right Babs
[12:38] <costyn> jonsowman: how do get checksum errors on habitat that dl-fldigi didn't catch?
[12:38] <jonsowman> Babs: http://pastie.org/private/4noc8jboxgqjoql5ca51nw
[12:39] <jonsowman> costyn: I was wondering that
[12:39] <jonsowman> fsphil: does fldigi upload checksum invalid strings these days?
[12:41] <cuddykid> iPad habhub version finally sorted :) just need to get the splash screen image/writing done now
[12:41] <costyn> good at any rate that habitat checks the checksum again
[12:41] <jonsowman> it could be that it uploads things starting in $$ and ending in newline
[12:41] <jonsowman> i can't remember tbh, been too long since i looked at it
[12:41] <jonsowman> someone will know
[12:42] <costyn> jonsowman: looks to me like that spurious \n is causing problems
[12:42] <costyn> habitat.parser can't find the checksum in the string
[12:42] <Babs> Just been outside and the antenna was clanging against the garden gate (metal). Moved it away and turned up the volume on the yaesu, lets see whether that helps.
[12:43] <costyn> Babs: there's something else weird going on, but we're still trying to figure out what
[12:43] <jonsowman> yeah, can't quite work it out
[12:43] <jonsowman> it's weird that sometimes it's getting it right and sometimes now
[12:44] <jonsowman> I can't see a pattern between success/failure strings
[12:45] <jonsowman> oh I think I know what's happening
[12:45] <jonsowman> Babs: is your code online?
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[12:45] Nick change: Geoff-G8DHE__ -> Geoff-G8DHE
[12:45] <jonsowman> this is suspicious
[12:46] <jonsowman> BABSHAB,288,12:44:31,52.7763,-2.4987,134,0,9,3322*EDE
[12:46] <jonsowman> checksum is being printf'ed as %X instead of %04X I think
[12:46] <costyn> ah
[12:46] <costyn> somehow it gets ok'd by dl-fldigi?
[12:46] <jonsowman> but I think there is something else wrong too, checksum for that string should be 0x7738
[12:47] <x-f> from my experience, dl-fldigi uploads all that looks like a complete sentence, not only valid strings
[12:48] <jonsowman> yes I think you're right x-f
[12:48] <jonsowman> well, it's the only thing that makes sense
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[12:48] <Babs> jonsowman: http://pastebin.com/6pi0QivT
[12:49] <Babs> there's some excessive commenting, but the string format is down at line 100 or so
[12:50] <jonsowman> that doesn't seem to include any checksum stuff
[12:50] <jonsowman> oh I see, checksum is done in txString
[12:51] <jonsowman> where is txString defined?
[12:52] <jonsowman> $$BABSHAB,324,12:51:43,52.77362,-2.41986,134,0,11,3355*20
[12:52] <jonsowman> hmm
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[12:54] <jonsowman> not sure what's going on here
[12:54] <jonsowman> time for a cup of tea
[12:56] <eroomde> and a pipe
[12:57] <jonsowman> :)
[12:57] <costyn> http://images.t-nation.com/forum_images/c/7/c72c9_ORIG-im_so_british.jpg
[12:57] <costyn> (sorry)
[12:57] bubbu (1896dffc@gateway/web/freenode/ip.24.150.223.252) joined #highaltitude.
[12:57] <jonsowman> haha
[12:58] <bubbu> hey guys, any recommendations for camera? I want a crisp, cinematic look that will blow people's minds for a presentation,
[12:58] <Babs> jonsowman - There's a separate RTTY tab, code here http://pastebin.com/2wQ9LSui
[12:59] <eroomde> bubbu: leica m10 with summilux 35mm
[12:59] <costyn> eroomde: lol
[12:59] <eroomde> light and the best picture quality you can get for the size
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[12:59] <costyn> Availability is scheduled for early 2013 with a retail price of $6,950 in the US and £5100 in the UK.
[13:00] <eroomde> no constraint on price was given
[13:00] <costyn> new arhab record category, most expensive payload flown
[13:00] <jonsowman> or application
[13:00] <jonsowman> hmm well, that's my theory out of the window
[13:00] <costyn> jonsowman: sprintf(txSum, "%04X", checkSum);
[13:00] <costyn> yup
[13:00] <eroomde> i think the esa payload might win that category for a bit yet
[13:00] <bubbu> haha, okay, that's a bit out of my price range. Looking within the 300 mark.
[13:00] <jonsowman> sprintf(txSum, "%04X", checkSum);
[13:01] <costyn> eroomde: well, yea, but I mean amateur
[13:01] <eroomde> bubbu: somethign manual and with a decent wideangle lens, i would go for
[13:01] <eroomde> manual because you know better than it does
[13:01] <jonsowman> costyn: in which case, what on earth is going on here
[13:01] <jonsowman> $$BABSHAB,367,13:00:19,52.77361,-2.4986,133,0,10,3377*41D
[13:01] <eroomde> wide because you get more curvature of the earth
[13:01] <eroomde> maybe a 2nd hand micro 4/3rd camera?
[13:01] <eroomde> panasonic GF1 or something?
[13:01] <bubbu> in that case what about go pro?
[13:01] <eroomde> lens is shit
[13:02] <eroomde> oh do you want video?
[13:02] <costyn> and a very smll sensor
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[13:02] <eroomde> and that, tho noise less of a prob in bright sunlight
[13:02] <bubbu> yes, video.
[13:03] <costyn> bubbu: a new gopro will do the job
[13:03] <eroomde> ah
[13:03] <bubbu> read articles about gopro freezing up at altitude.
[13:03] <eroomde> options are more limited
[13:03] <costyn> bubbu: or any of the other action cams, you do want to try to keep it light
[13:03] <bubbu> anyone have experience with gopro?
[13:03] <eroomde> yes plenty
[13:04] <costyn> bubbu: yup, flew one on my last flight
[13:04] <eroomde> they are fine for what they are
[13:04] <eroomde> and the 3 looks quite gucci
[13:04] <costyn> bubbu: here's a comparative review of the action cams, done by a guy I know: http://www.dropzone.com/news/Gear/Best_POV_Action_Camera_Shootout_6_Challengers_Reviewed_854.html
[13:04] <bubbu> checking link now
[13:04] <costyn> bubbu: Sony HDR AS 15 might fit your bill
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[13:06] <mattbrejza> ive seen the gopro not handle cloud very well and overexpose it (such as in the last video steve posted)
[13:07] <costyn> mattbrejza: nope, it's kinda bad
[13:07] <Babs> OK, off to check range, will try and work out what is going on with the checksum later - thanks everyone
[13:07] <eroomde> yeah, i don;t like autoexposure for hab flights
[13:07] <eroomde> it's very controlled, much better if you can set it all manually
[13:07] <costyn> mattbrejza: on my video too it didn't do a very good job, but conditions are difficult of course. clouds and sun very bright, sky very dark
[13:07] <mattbrejza> the contour roam 2 we used last time was much nicer howver
[13:07] <daveake> I was thinking of using manual settings for half the photos on my next flight
[13:07] <eroomde> it Will Be a sunny day when you're up there
[13:07] <costyn> daveake: half?
[13:07] <eroomde> unless it's at night
[13:08] <eroomde> so you can calculate the exposure settings easily in advance
[13:08] <costyn> daveake: can you change them in CHDK ?
[13:08] <daveake> Well I've got 2 radio channels, and it would be very easy to use auto on one side and manual on the other
[13:08] <costyn> (the mode)
[13:08] <daveake> Ah, this is the Pi camera
[13:08] <costyn> ah ok
[13:08] <mattbrejza> eg http://benoxley.co.uk/wp-content/uploads/2013/03/PhysocBearWLogo.jpg
[13:08] <daveake> All done in a bash script
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[13:09] <daveake> As eroomde says the settings for correct exposure of the ground can be calculated in advance
[13:09] <SpeedEvil> if cloudless
[13:10] <costyn> yea pics below the clouds are gonna be dark
[13:10] <daveake> Yeah but above the amount of light is known, and clouds will end up white
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[13:12] Lunar_Lander (~gd-compto@p5488AE64.dip0.t-ipconnect.de) joined #highaltitude.
[13:13] <Lunar_Lander> hello
[13:13] <x-f> hello, you're early
[13:14] <Lunar_Lander> yes
[13:15] <Lunar_Lander> and
[13:15] <Lunar_Lander> sveiki
[13:15] <Lunar_Lander> :)
[13:15] <Lunar_Lander> (at least Google says that is Hello in Latvia)
[13:15] <x-f> it is :)
[13:17] <eroomde> oh that is shit news about richard griffthis
[13:17] <eroomde> tribute viewing of withnail called for
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[13:18] <Hix> No more Monty
[13:18] <Hix> shame
[13:19] <eroomde> might find a bottle of margeaux to steal in his honour
[13:20] <Lunar_Lander> :(
[13:21] <eroomde> hoping london would be less grey than oxford
[13:21] <eroomde> so far, no
[13:21] <Lunar_Lander> I got a song for you that is famous in Germany at the moment
[13:21] <Lunar_Lander> https://www.youtube.com/watch?v=64XEIdhehgk
[13:21] <SpeedEvil> sunny here
[13:22] <bubbu> SpeedEvil, you from Canada?
[13:22] <SpeedEvil> five
[13:22] <SpeedEvil> fife
[13:22] <SpeedEvil> Scotland
[13:22] <Lunar_Lander> hi bubbu
[13:22] <Lunar_Lander> I think you are the first Canadian here
[13:22] <Lunar_Lander> as natrium42 lives in the US now
[13:22] <SpeedEvil> I'm more northerly than inhabited Canada
[13:22] <bubbu> where abouts exact;y
[13:22] <bubbu> exactly*
[13:23] <bubbu> oh, someone said you were Canadian yesterday. Disregard.
[13:23] <bubbu> Seems like Canadian regs are more stringent on balloon flights. They want a transponder onboard.
[13:23] <costyn> bubbu: sucks to be you :P
[13:23] <costyn> bubbu: that is unusual
[13:23] <SpeedEvil> I said natrium was Canada.
[13:23] <costyn> bubbu: even for "small" balloons?
[13:24] <SpeedEvil> also, it can be worth digging up the actual regs.
[13:24] <bubbu> sorry, my mistake SpeedEvil. For small balloons, above 60,000 feet the regs call for a transponder.
[13:24] <SpeedEvil> don't always assume front line staff have a clue
[13:24] <bubbu> but according to the Canadian air regulations, outside 65nm of the nearest busy airport, transponder not needed.
[13:25] <SpeedEvil> and if they have blanket policies not laid out in law, that may be subject to judicial review
[13:25] <costyn> bubbu: above 60,000ft? makes no sense, there's no planes there
[13:25] <bubbu> spoke with the chief flight instructor at a local airport, he indicated a transponder was not needed.. many people are doing it without.
[13:25] <bubbu> i know!
[13:25] <SpeedEvil> err, never mind, I've got my welfare policy hat on
[13:26] <bubbu> tranpsonder regardless go for 2 grand and they are heavy for this type of payload.
[13:26] Action: SpeedEvil has been reading too many universal credit regulations.
[13:27] <costyn> bubbu: but surely you can find a place to launch from out of reach of a nearby airport
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[13:31] <Hix> *Warning!! contains bad language - but in light of events i believe its acceptable https://www.youtube.com/watch?feature=player_detailpage&v=6m6LhZJdCQY
[13:41] <chrisstubbs> The solar powered cockroach on my desk just sprung to life, better weather is on the way! :)
[13:42] <Hix> heh
[13:42] <chrisstubbs> My ublox is getting a fix fine and everything works if i disable the part that puts it into flight mode. But im back to this stage again :P
[13:43] <chrisstubbs> lets just hope the rx on the ublox isnt soldered properly
[13:44] <Hix> i seem to remember it needing a delay for flight mode, can anyone else corroberate this?
[13:45] <chrisstubbs> yeah. the software works ok with the ublox breakout from you know who
[13:45] <daveake> What that probably means is that the gps code is getting confused with the replies from the UBX commands
[13:45] <chrisstubbs> its the neo6 in my awful smd board :P
[13:46] <daveake> So when you send the UBX commands you will get some UBX replies. Does your GPS receiving/parsing code cope with that?
[13:46] <chrisstubbs> Yeah it reads back the ubx command and if it times out it sends it again
[13:46] <chrisstubbs> that seems to be the case, as it sends the command to switch to flight mode every 3 or so seconds
[13:48] <Lunar_Lander> hey chrisstubbs and daveake and Hix
[13:48] <Hix> guten abend Lunar_Lander
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[13:48] <Lunar_Lander> :)
[13:49] <Hix> was passiert
[13:50] <Lunar_Lander> ah listening to music and you :)?
[13:51] <Hix> mostly trawling through Withnail clips thanks to eroomde
[13:52] <Hix> should really be sorting out my front suspension, but the weather is not conducive to sitting outside for hours on end
[13:56] <griffonbot> @ApexLumia: I'm at 51.41058, -0.27007 at an altitude of 16.2m http://t.co/OxgDebyz6a #apexhab #ukhas [http://twitter.com/ApexLumia/status/317636303447527424]
[13:56] <Hix> I think I am going to pull my telescope mount apart so I can measure it all up and model it in CAD in anticipation of a stepper and GOTO upgrade project
[13:56] <Lunar_Lander> cool
[13:57] <Lunar_Lander> Music! https://www.youtube.com/watch?v=64XEIdhehgk
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[14:53] <Willdude123> Hi.
[14:54] <Lunar_Lander> hello
[14:54] <chrisstubbs> afternoon
[14:55] <Lunar_Lander> how is the life?
[14:55] <Willdude123> Meh.
[14:55] <costyn> can someone twitter back at ApexLumia to please take out the UKHAS hashtag?
[14:55] <Willdude123> I think we shpu
[14:56] <costyn> I for one don't want to see every update from that thing on here
[14:56] <costyn> (I don't have twatter)
[14:56] <Willdude123> We should do a drive to get bananas the most popular word on the pisg stats.
[14:58] <chrisstubbs> costyn, who runs apex?
[14:58] <costyn> chrisstubbs: no idea
[14:59] <chrisstubbs> apex a name i recognise but cant think of who it is
[14:59] <mfa298> with only one tweet an hour ago I suspect the tweet function was turned off already
[15:00] <Lunar_Lander> priyesh for example
[15:01] <priyesh> costyn: i've turned off twitter for it. but no access to the source so i can't take the hashtag out just yet
[15:01] <costyn> priyesh: ok thanks
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[15:18] kiwi_ (50d97db4@gateway/web/freenode/ip.80.217.125.180) joined #highaltitude.
[15:19] <kiwi_> Hi, anyone here?
[15:20] <SpeedEvil> yes
[15:21] <kiwi_> How are you?
[15:26] <kiwi_> You people are tough to chat up ;)
[15:27] <chrisstubbs> haha
[15:27] <chrisstubbs> whats up kiwi_
[15:28] <kiwi_> Hi chris, I'm having a break from programming and soldering. A cup of tea and surfing.
[15:28] <chrisstubbs> same, stuffing my face with soup and toast before i crack on debugging the gps
[15:30] <kiwi_> What are you working on? I've been keeping an eye on ukhas for a while but only really read of a few projects.
[15:31] <chrisstubbs> just a bog standard GPS radio tracker
[15:31] <chrisstubbs> uBlox NEO-6 GPS and RFM22b radio transmitter
[15:31] <chrisstubbs> and you?
[15:31] <kiwi_> Have I heard of the project?
[15:32] <chrisstubbs> possibly not. my payloads under development are NSE and CHEAPO
[15:32] <chrisstubbs> aiming to launch in april
[15:33] <kiwi_> NSE..?
[15:33] <kiwi_> not so entertaining?
[15:33] <chrisstubbs> near space explorer haha
[15:33] <kiwi_> Let's hope for the latter ;)
[15:33] <kiwi_> Myself I'm polishing a radiosonde I've been working on
[15:33] <Lunar_Lander> NTRS still down, says "NASA has to check for confidential info"
[15:35] <x-f> given the amount of information they have, it will take forever (quite literally)
[15:35] <chrisstubbs> made a little vb.net program earlier to block and skip annoying songs on spotify
[15:37] <kiwi_> chrisstubbs: Do you have a webpage for the payloads?
[15:38] <chrisstubbs> I have done a few blog posts about them :) http://chris-stubbs.co.uk/wp/?cat=10
[15:42] <kiwi_> Thanks, will check it out
[15:43] <cuddykid> managed to have some small hex flights without breaking anything :)
[15:44] <chrisstubbs> cuddykid, thats always a result!
[15:44] <cuddykid> yep :D
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[15:44] <cuddykid> slowly learning to control it (emphasis on the slowly)
[15:46] <chrisstubbs> are you autopiloting or just remote control?
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[15:48] <chrisstubbs> I must say that chip antenna is impressive, 7 sats indoors!
[15:49] <Lunar_Lander> AWESOME
[15:49] <chrisstubbs> haha
[15:50] <chrisstubbs> right flight mode debuging time (again_
[15:50] <chrisstubbs> hows things Lunar_Lander
[15:50] <cuddykid> chrisstubbs: APM is stabilising but I have manual control
[15:51] <cuddykid> it does a great job of keeping it stable
[15:51] <Lunar_Lander> ah I am good thanks and you?
[15:51] <chrisstubbs> cuddykid, i see, cool :)
[15:52] <chrisstubbs> is all that land in the crash video yours?
[15:52] <kiwi_> chrisstubbs, I read your website now. Some cool stuff going on. You mentioned a 808 camera, do you know a good one? I would like to use one too
[15:52] <chrisstubbs> and not bad thanks Lunar_Lander, HABbing away as usual
[15:52] <kiwi_> I have some low res ones that I'm not so impressed by
[15:52] <chrisstubbs> kiwi_, its hard to tell. im not sure what type mine is
[15:53] <chrisstubbs> yeah the resolution is crap and they dont like the cold/moisture. but mine dosent seem to interfere with GPS
[15:53] <kiwi_> I want to solder wires to the buttons to control it from my AVR.
[15:54] <chrisstubbs> Using mine for video, start it when we let go and hope it lasts at least a few mins :P
[15:55] <kiwi_> I measured video currrent consumption to 200 mA
[15:55] <chrisstubbs> blimey thats a lot
[15:56] <kiwi_> I've heard figures of 40 min recording time though
[15:56] <Lunar_Lander> ah kiwi_ one moment
[15:57] <kiwi_> Seems reasonable given the size of the battery
[15:57] <Lunar_Lander> kiwi_, http://www.techmoan.com/blog/2011/12/25/christmas-presents-the-80816-camera.html
[15:57] <chrisstubbs> yeah i got a good 30-40 mins out of mine in testing
[15:58] <chrisstubbs> put it outside in the snow and i think some moisture got on the crystal/cpu inside becuase the video went nuts
[15:59] <kiwi_> Nr #16 looks good
[15:59] <Lunar_Lander> I got about four hours
[15:59] <Lunar_Lander> with this http://www.ebay.co.uk/itm/External-Power-Pack-UPS-Charger-16-HD-808-Car-Key-Camera-1200mAH-appr-200M-/160707969178?pt=US_Uninterruptible_Power_Supplies&hash=item256af1009a
[16:00] <costyn> Lunar_Lander: I have one of those too, pretty nice
[16:00] <Lunar_Lander> yea
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[16:01] <chrisstubbs> i see pointless LED's :P
[16:01] <chrisstubbs> neat idea though
[16:03] <cjdavies> remember that HK mAh aren't the same as real mAh :P
[16:03] <cjdavies> eg genuine cacpacity will be substantially lower than advertised
[16:03] <kiwi_> $39 for a #16 cam?
[16:04] <cjdavies> I've seen '10,000mAh' packs that in reality only hold about 6500mAh
[16:04] <chrisstubbs> cjdavies, and feel lucky if more than half the cells even work!
[16:04] <chrisstubbs> i got some of those 10000mah ones. complete rubbish
[16:04] <cjdavies> new regulations also means that less of the cheap ones can be shipped internationally (at least to UK, maybe EU) now
[16:04] <chrisstubbs> 6/10 of them held a charge but with rubbish capacity
[16:04] <cjdavies> they have to conform to some new standard
[16:05] <cjdavies> which the cheap ones obviously don't
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[16:08] <kiwi_> What's the record for lightweight flights? I reached 2400m yesterday on about 17 liters of helium.
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[16:13] <chrisstubbs> the lightweight flights tend to go for distance/flight time
[16:14] <chrisstubbs> PicoAtlas floated between 2500-4000 i seem to remember
[16:16] <kiwi_> Ok, not quite the same category then
[16:17] <chrisstubbs> there is a UKHAS record page, but nothing on pico altitudes http://ukhas.org.uk/general:uk_records
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[16:18] <kiwi_> That's the page I was looking for.
[16:18] <chrisstubbs> aha good :P
[16:18] <chrisstubbs> hmm maybe my ublox wasnt getting the flight mode commands becuase i forgot to solder the pin.....
[16:18] <chrisstubbs> oops
[16:20] <kiwi_> That could be a reason
[16:22] <kiwi_> I recently had no contact with the GPS; reason turned out to be I mounted the GPS the wrong way around.
[16:22] <chrisstubbs> haha
[16:22] <kiwi_> i.e. don't do that.
[16:22] <chrisstubbs> i connected 5v to the rx pin of an atmega earlier, puzzled me when i disconnected the battery and it carried on working
[16:23] <kiwi_> Yeah :)
[16:25] <kiwi_> I used a new power connector and was surprised the PCB used 1 A.. the connector had switched polarity compared to common sense.
[16:25] <chrisstubbs> oops
[16:26] <kiwi_> Pretty amazingly it all worked once I switched polarity.
[16:27] <chrisstubbs> haha
[16:28] <chrisstubbs> right time to pop outside and see if this thing will go into flight mode! BRB
[16:28] <kiwi_> Back to soldering. I'm making some radiosondes for hot air balloon people.
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[16:37] <chrisstubbs> YAY hello flight mode! :D
[16:38] <chrisstubbs> moral of the story: if you want stuff to work, solder it.
[16:40] <Hix> prety good rule of thumb chrisstubbs
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[16:40] <chrisstubbs> im going to go for a walk with the tracker and see how well the chip antenna etc work on the go
[16:40] <Hix> wishing I'd put battery backup on tracker pcb now
[16:41] <Hix> Lock!!
[16:42] <chrisstubbs> ive started a PCB revision list for next time. Breaking out the reset pin would have made programming a lot easier
[16:42] <Hix> the bodged divider on the PCB seems to work. Now I can get down to some proper environmental testing
[16:42] <Lunar_Lander> chrisstubbs, cool
[16:43] <chrisstubbs> Hix i feel your pain soldering that ubox
[16:43] <chrisstubbs> ublox
[16:43] <Hix> its horrible no?
[16:43] <chrisstubbs> it was shorting on my ground plane. had ro hot air it off with a paint stripper
[16:44] <Hix> ewww
[16:44] <Hix> Yup, all sorted $$HixHAB,13,16:44:21,51.6830,+0.0280,41,6*5C77
[16:45] <chrisstubbs> hixhab. love it man
[16:45] <Hix> I'm sure I'll come up with something relevant for flight
[16:46] <chrisstubbs> nahh i like it!
[16:46] <Hix> heh
[16:46] <chrisstubbs> when are you doing kite testing?
[16:46] <Hix> need to make a kite :/
[16:46] <chrisstubbs> i have an idea, what if you attatch it to a balloon
[16:46] <Hix> got 10m^2 of bright orange ripstop
[16:46] <Hix> you reckon, cant see that working ;p
[16:47] <chrisstubbs> got any pics of the complete board?
[16:47] <Hix> sec
[16:47] <Hix> well minutes
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[16:53] <Hix> chrisstubbs: http://stratosvision.com/img/TrackerComplete.jpg
[16:54] <chrisstubbs> looks so nice woth a pro board
[16:54] <chrisstubbs> ublox does look near though
[16:54] <chrisstubbs> *neat
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[16:57] <Hix> hmm refresh for lens distortion correction #pedant
[17:01] <kiwi_> Nice board, Hix
[17:01] <Hix> cheers dude
[17:01] <kiwi_> So straight lines ;)
[17:02] <chrisstubbs> bloody typos
[17:03] <chrisstubbs> i like it
[17:05] <Hix> if i squint I can not see the pikey divider hack ;p
[17:07] <chrisstubbs> prepare yourself for my mess
[17:07] <Hix> if it works it works!!
[17:07] <Hix> can't see it at >30,000m
[17:11] <Hix> Hourly integratred into fb page now too :) http://goo.gl/hfNzq
[17:12] <chrisstubbs> ooo
[17:13] <Hix> now i spose i should pull finger out of my arse and actually do something with the website and blog
[17:14] <chrisstubbs> the problem i find with the blog is it gets messy, combinations of posts & pages
[17:15] <Hix> my problem is lack of design and lack of pages and posts :)
[17:15] <chrisstubbs> wordpress :P
[17:16] <Hix> easiest and quickest route. Though I might actually do a proper site and just integrate the wp blog aspect into the site
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[17:16] <Hix> ooh suns back, lovely light here atm
[17:16] <Hix> golden
[17:17] <chrisstubbs> the cockroach died after about 10 mins :(
[17:17] <Hix> bad weather then
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[17:17] <chrisstubbs> :P
[17:17] <chrisstubbs> design note: include more pads with thermal releig - gound plane is hard to solder to
[17:18] <chrisstubbs> relief
[17:18] <Hix> heh getting as good as i am with the typos :)
[17:18] <Hix> Mitch getting a bit of a backlog, so if you want boards for your launch the time is now chrisstubbs
[17:19] <chrisstubbs> nahh im flying homebrew
[17:19] <chrisstubbs> oh yeah i put a pic on flickr bear with
[17:19] <arko> morning
[17:20] <chrisstubbs> hi arko
[17:20] <Hix> hey arko, all set?
[17:20] <arko> how goes it
[17:20] <arko> yup
[17:20] <Hix> kewl
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[17:20] <arko> packing up
[17:20] <Hix> when's d-day
[17:20] <Hix> tomoz?
[17:20] <arko> getting ready for the desert
[17:20] <arko> d-day is tomorrow
[17:20] <arko> 1700UTC
[17:20] <arko> after 2 years since losing my first hab
[17:20] <arko> im feelin good about this one
[17:21] <Hix> nice, god-speed
[17:21] <arko> my only fear is getting the decent velocity right ..
[17:21] <arko> thanks Hix!
[17:21] <Hix> :)
[17:21] <arko> anyone done a 4lb payload?
[17:21] <Hix> americans ;p
[17:21] <eroomde> yes
[17:21] <arko> 1814
[17:21] <arko> eroomde: what was your decent velocity?
[17:21] <eroomde> that's <3kg. lots of payloads used to be about 3kg
[17:21] <arko> 1814g*
[17:21] <eroomde> 5m/s
[17:22] <arko> 48" parachute?
[17:22] <eroomde> can't remember, i just calculated the chute i'd need then bough the nearest one
[17:22] <arko> as long as we're above 3.5m/s
[17:22] <arko> cool
[17:22] <arko> my math shows 6.37m/s
[17:22] <eroomde> you can do the same iuw
[17:22] <arko> without taking into account aerodrag
[17:22] <eroomde> what Cd are you assuming?
[17:22] <eroomde> huh?
[17:23] <arko> http://wiki.032.la/nsl/HABEX2#Parachute
[17:23] <eroomde> how do you calc a descent rate without drag?
[17:23] <arko> aerodrag of the payload box*
[17:23] <arko> sorry
[17:23] <eroomde> ah
[17:23] <arko> hahaha
[17:23] <eroomde> right yes
[17:23] <chrisstubbs> http://flic.kr/p/e73MA1
[17:23] <Lunar_Lander> eroomde, we did always use Cd = 1
[17:23] <arko> i assumed 0.75
[17:23] <Lunar_Lander> and obviously we were wrong
[17:23] <arko> 1?!
[17:23] <Lunar_Lander> as we came down slower than calculated
[17:23] <eroomde> that's a bit high Lunar_Lander
[17:23] <eroomde> that sounds ok arko
[17:23] <Lunar_Lander> for a parachute?
[17:23] <arko> :)
[17:23] <arko> i just hope this thing comes screaming down
[17:23] <eroomde> yes
[17:24] <arko> but not to hard
[17:24] <arko> because if it takes it's sweet time we land it water
[17:24] <Hix> looks good chrisstubbs
[17:24] <eroomde> 0.75 is probably nearer the mark for a normal chute
[17:24] <arko> anything between 2.5-3.5m/s is water
[17:24] <arko> but even if the payload was 2lbs it would still be 4.5m/s
[17:24] <chrisstubbs> check out those crystal loading caps
[17:25] <Hix> 0805's?
[17:25] <chrisstubbs> 0603 i think, stole them from work
[17:25] <chrisstubbs> yeah 0603
[17:25] <Hix> heh,
[17:25] <kiwi_> What descent speed do people aim for?
[17:25] <Hix> sackable nicking such high value stuff
[17:25] <Hix> 5m/s
[17:26] <Hix> generally
[17:26] <Hix> i believe
[17:26] <chrisstubbs> im an apprentice, i asked the guy if i could use some components for soldering practice
[17:26] <chrisstubbs> i got my practice, and now my crystal has loading caps :)
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[17:27] <eroomde> agree with Hix
[17:27] <eroomde> <= 5m/s
[17:27] <Hix> its a fair theory chrisstubbs it was practice
[17:29] <Hix> right time to scoot and fill my belly with good things, and then overfill it with beer!!
[17:29] <chrisstubbs> looks like a need more though
[17:29] <chrisstubbs> ;) laters hix
[17:29] <Hix> laters
[17:32] <kiwi_> I get about 7 m/s fall speed but the payload is light
[17:32] <arko> what's light?
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[17:32] <kiwi_> 12g
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[17:33] <arko> wow
[17:33] <arko> is it made of aerogel?
[17:33] <arko> http://habhub.org/predict/#!/uuid=1d997c0c46a30c0d7cec474138d3e965509b666e
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[17:34] <kiwi_> Antimateria ;) No, but I put a lot of work into making it light
[17:36] <kiwi_> That includes a speaker to help recovery
[17:37] <eroomde> i guess it'd be hard to spot even if very close
[17:38] <kiwi_> Yes I've searched in a corn field and a wheat field. Speaker and powerful strobe really help.
[17:38] <eroomde> do you have a picture of the payload?
[17:38] <kiwi_> Searched /for hours/ I should add
[17:39] <Lunar_Lander> hi mclane
[17:39] <kiwi_> Will have a look.
[17:40] <kiwi_> I'm only now starting to publish more detailed info so not that much online yet
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[17:47] <kiwi_> eroomde: A picture is here http://kiwiembedded.com/windsond/
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[17:47] <chrisstubbs> thats cool kiwi_
[17:49] <kiwi_> Thanks, put an incredible amount of work into that. There's a computer program for it too.
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[17:51] <eroomde> v nice kiwi_
[17:51] <chrisstubbs> yeaht the program looks pretty complex
[17:51] <chrisstubbs> brb
[17:52] <kiwi_> I'll upload some newer screenshots
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[17:58] <kiwi_> http://kiwiembedded.com/2013/03/new-windsond-screenshots/
[17:58] <chrisstubbs> what did you write that in?
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[17:59] <eroomde> his office, i reckon
[18:01] <kiwi_> WxPython
[18:01] <chrisstubbs> ahhh i had fingers crossed for vb ;)
[18:01] <kiwi_> Or tshirt and loose trousers, take your pick.
[18:01] <chrisstubbs> haha
[18:02] <kiwi_> Are you into VB chrisstubbs?
[18:02] <chrisstubbs> Yeah i'm afraid so
[18:03] <chrisstubbs> not crazy into it, but ive made loads of little things. most of them pointless
[18:03] <eroomde> were you the person to whom I was rude about VB before?
[18:03] <eroomde> or can I do it again now?
[18:03] <chrisstubbs> dont think so, fire away!
[18:03] <eroomde> or maybe that was labview someone erroneously suggested was good
[18:04] <kiwi_> It was a long time since I used VB, 10 years or so. I think it matured since then.
[18:04] <chrisstubbs> Yeah that would have been well before the days of vb.net
[18:05] <kiwi_> true
[18:05] <kiwi_> Seems easy to create neat GUIs in .net
[18:05] <kiwi_> I'm more of a Linux/C kind of huy
[18:05] <kiwi_> "guy"
[18:06] <chrisstubbs> yeah, drag, drop, double-click, type. nice and easy for doing simple stuff
[18:06] <chrisstubbs> anyway payload testing time! brb
[18:06] Action: chrisstubbs starts work on vbHAB 0.1
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[18:09] <kiwi_> Really?
[18:09] <chrisstubbs> no, that would be horrible :P
[18:10] <chrisstubbs> brb
[18:22] <Upu> arko this will happen when you come to the UK http://youtu.be/j-BPWQv-yRk
[18:22] <Upu> NSFW due to sweary
[18:22] <arko> HAHAHAHAHA
[18:23] <arko> now my coworkers are looking at me
[18:23] <arko> literally lol'd
[18:24] <arko> that made my day
[18:24] <Upu> glad you liked it
[18:25] <Lunar_Lander> evening Anthony
[18:26] <Upu> evening Lunar
[18:27] <eroomde> v good wiki page arko
[18:27] <arko> thanks, it's going to be much better after launch
[18:27] <arko> im going to do a full website
[18:27] <arko> i have lots of videos of the process
[18:29] <eroomde> hmmm
[18:30] <eroomde> hmmedyhmmhmm
[18:30] <eroomde> i wonder if you could infer pressure accurately with capacitance
[18:30] <eroomde> using the air as dialetric between two plates
[18:30] <arko> yeah
[18:31] <arko> it's been done, but you need a good amount of surface area
[18:31] <eroomde> i can imagine
[18:31] <arko> well
[18:31] <arko> hmm
[18:31] <eroomde> do you know if it's accurate?
[18:31] <arko> depends on the measuring end
[18:32] <Lunar_Lander> humidity also changes the dielectric coefficient of air
[18:32] <Willdude123> It feels like cheating when I put a 747 on FSX in autopilot to go on IRC.
[18:32] <arko> ^^^
[18:32] <arko> also, any free radical gasses
[18:32] <arko> like some dude farting on your sensor and what not
[18:32] <Lunar_Lander> XD
[18:32] <arko> i've heard of them
[18:32] <arko> cap based
[18:33] <Lunar_Lander> yea the Bosch BMP085 is capacitive
[18:33] <arko> purely, but it requires being able to measure like nA
[18:33] <eroomde> there are capacitance based pressure sensors
[18:33] <arko> really?
[18:33] <Lunar_Lander> but there is something like a measuring capsule inside
[18:33] <eroomde> that's quite common
[18:33] <Lunar_Lander> yes
[18:33] <eroomde> but they don;t measure the dialectric constant change
[18:33] <arko> hmm
[18:33] <Lunar_Lander> I just wondered about piezoelectrics
[18:33] <Lunar_Lander> but i.e. a lighter only gives a spark if you like press it
[18:34] <arko> aren't those mems?
[18:34] <Lunar_Lander> now we wouldn't need a spark
[18:34] <eroomde> they have a barocell and measure the bulge of the barocell by measuring capacitance between the end plates
[18:34] <Lunar_Lander> mems?
[18:34] <arko> some prefilled bubble
[18:34] <Lunar_Lander> ah
[18:34] <arko> right
[18:34] <arko> but a pure open air is very different
[18:35] <eroomde> but it's been done?
[18:35] <arko> yes
[18:35] <arko> i remember reading about it when i worked at my first job
[18:35] <arko> designing humidity sensors
[18:35] <arko> but the rig was crazy
[18:35] <eroomde> barattron guage*
[18:35] <eroomde> apparently the name for the capacitance to measure barocell deflection thing
[18:36] <arko> ah!
[18:36] <arko> good to know
[18:36] <eroomde> single t
[18:36] <eroomde> baratron
[18:37] <Lunar_Lander> cool
[18:39] <eroomde> i quite want to make a thor machine
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[18:39] <eroomde> a hab which unfurls say 1km of thin copper wire when over a target
[18:40] <eroomde> and discharges a HV cap down it to create a big PD bewtween the ends
[18:40] <arko> http://www.instrumentationtoday.com/capacitance-transducer/2011/10/
[18:40] <arko> eroomde: ^^
[18:40] <eroomde> which should induce lighting above the target
[18:40] <Lunar_Lander> eroomde, there is a lab somewhere in the US
[18:40] <Lunar_Lander> they fire rockets into clouds trailing wires to do that
[18:41] <Lunar_Lander> at least they did some time around 1995
[18:41] <SpeedEvil> eroomde: I have a sort of design for a 100kv power supply
[18:41] <eroomde> the copper would vapourise and create a nice plasma to help things along
[18:41] <SpeedEvil> eroomde: not, however light
[18:41] <eroomde> cool website and link thanks arko
[18:41] <arko> np
[18:41] <arko> i have tons of papers on pressure, temp, hum sensors
[18:41] <SpeedEvil> microwave inverter - cockroft Walton stage.
[18:42] <arko> fun stuff
[18:42] <eroomde> that could be a pretty cool way to measure NOx levels in a storage tank infact
[18:42] <arko> hmm
[18:42] <arko> i would love to see a chart of dielectric constant vs. pressure of a bunch of different gasses
[18:43] <Lunar_Lander> let's measure it
[18:46] <eroomde> http://www.youtube.com/watch?v=h9PUVQaeI0k
[18:46] <eroomde> cool
[18:46] <eroomde> must make a hab version
[18:46] <arko> EPIC
[18:47] <chrisstubbs> woah
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[18:47] <eroomde> nice puff of brown NO2
[18:50] <SpeedEvil> that looks triggered, and amateur.
[18:50] <eroomde> yes the bit of copper wire being pulled up and over is a clue that it's triggered
[18:52] <Hiena> SpeedEvil: It is. It's called "thunderbolt making" around here. Frequently used by the cable thiefs testing the lines.
[18:56] <SpeedEvil> http://www.youtube.com/watch?v=kVXi_0H_ZzM
[18:56] <SpeedEvil> herbicide
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[19:03] <chrisstubbs> hey daveake
[19:04] <chrisstubbs> Turns out it was a bad solder joint, tracker is working perfect now :)
[19:04] <chrisstubbs> dinnertime :)
[19:04] <kiwi_> hi daveake
[19:05] <kiwi_> My IRC client stops autoscrolling so I'm sometimes a bit behind
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[19:40] <Morseman> Glad to hear that you sorted your tracker chrisstubbs
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[20:00] <Upu> for RX only is 75 ohm cable going to make any difference ?
[20:01] <mfa298> if everything else was a good 50 ohm match it might bring in a bit of loss but I'm not sure it's enough to make that much difference
[20:02] <BrainDamage> you'll get some reflection, which will drop snr abit, but it's not a huge deal unless you're trying to receive a signal at limit of your capabilities
[20:02] <mfa298> I'd have thought reasonable 75R coax is better than really cheap 50 ohm
[20:02] <Upu> RJ59
[20:03] <mfa298> I'd probably go with trying it out and see what happens
[20:04] <BrainDamage> for what's worth, the |gamma| of a 75<->50 mismatch is 0.2, squared for power calc is 0.04
[20:04] <BrainDamage> 4% loss
[20:04] <BrainDamage> in power
[20:04] <Upu> fine thanks :)
[20:04] <mfa298> I think there are supposed to be tricks of cutting it to a set of wavelengths that make the mismatch less of an issue as well (although that comes from CB info so could be wrong)
[20:05] <Upu> its ok it will be going into a HABAMp anyway
[20:09] <mfa298> the real problems come with much larger mismatches between the two which is usually a non resonant antenna connected to coax (but thats more common with hf)
[20:15] <eroomde> also the usual health warning worth mentioning in these kinds of chats that resonance += radiating
[20:15] <eroomde> you can make 50-ohm heaters quite easily
[20:15] <eroomde> 50 ohm antennas are harder
[20:15] <eroomde> I have made quite a few well matched heaters before
[20:16] <eroomde> resonance != radiating*
[20:17] <BrainDamage> antennas are actually impedance matchers!
[20:17] <mfa298> that sounds like the sort of comment that should go with the various reviews of the small HF antenna that work on all bands with no tuning.
[20:18] <BrainDamage> they adapt impedance of the transmission line to vacuum
[20:19] <eroomde> that is trueness
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[20:20] <mfa298> just had a quick google and the theory is that the imedance at the end repeats every 1/2 wavelength so if you cut the coax to a number of 1/2 wavelengths the impedance mismatch wont matter
[20:20] <mfa298> http://www.qsl.net/n9zia/wireless/75_ohm_hardline.html
[20:20] <eroomde> i have seen people before 'improving' their antennas by plugging them in vector analysers and bending and prodding the elements until the peak is in the right freq
[20:21] <eroomde> and declaring the antenna improved
[20:21] <mfa298> for VHF/UHF I'd tend to go for location rather than small amounts of prodding to improve how well it works
[20:22] <BrainDamage> mfa298: that's correct, but it's not very narrowband
[20:22] <BrainDamage> because wavelenght is function of frequency
[20:22] <BrainDamage> that's btw called a "stub"
[20:22] <eroomde> this is trueness ^
[20:22] <arko> All packed. Time to head out to the desert
[20:22] <Upu> good luck
[20:22] <arko> Woot woot!
[20:22] <eroomde> balloon launch or you've just become unhinged?
[20:22] <arko> Thanks fude
[20:22] <arko> Dude
[20:23] <fsphil> the dessert would be more fun
[20:23] <arko> eroomde: both?
[20:23] <arko> I hate the desert tbh
[20:23] <arko> I like the cold
[20:23] <arko> Sweating sucks
[20:23] <fsphil> doesn't it get cold there at night?
[20:24] <arko> Yeah. But the day is terrible
[20:24] <arko> 90F and above
[20:24] <fsphil> 32c. crikey
[20:24] <mfa298> I'm with fsphil dessert sounds much better.
[20:25] <mfa298> I didn't know such temperatures existed!
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[20:29] <eroomde> arko: parks and recreation
[20:29] <eroomde> i like it
[20:29] <arko> Dude
[20:29] <arko> Awesome show
[20:29] <fsphil> it was 32c in sydney when I was there. how I survived I will never know :)
[20:29] <arko> Gets better every seadon
[20:30] <arko> Fsphil: I feel sick thinking about it
[20:30] <arko> OK! I'll probably be back on when I'm out there
[20:30] <arko> Peace y'all!
[20:30] <fsphil> g'luck, and have fun!
[20:30] <Lunar_Lander> good luck arko
[20:30] <mfa298> good luck with it arko
[20:31] <arko> Thanks!
[20:31] <fsphil> I'm suppose to be tidying up but stargate sg1 is on
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[20:32] <Lunar_Lander> yea
[20:32] <M0TVU> Goodevening
[20:32] <fsphil> howdy M0TVU
[20:32] <M0TVU> Another question.
[20:33] <M0TVU> Does everyone run their <deice name> with internal or external xtals
[20:33] <fsphil> external here
[20:33] <chrisstubbs> Enjoy the launch arko hope it goes according to plan
[20:33] <M0TVU> I am runing my pick with internal at the moment and noticing some very weird behaiour
[20:34] <M0TVU> .
[20:35] <M0TVU> Ignoring the fact that the protocol isn't right take a look at this data .... http://pastie.org/7165956
[20:36] <M0TVU> Every now and then it misses the first field - in this case time
[20:36] <M0TVU> I can only assume that this is a timing issue. Has anyone seen anything like this before?
[20:36] <chrisstubbs> could it be a problem with the variable?
[20:37] <chrisstubbs> that the time is stored in
[20:37] <M0TVU> I don't think so as its so random
[20:37] <chrisstubbs> do you transmit the bits using an interrupt or just a delay between bits?
[20:37] <M0TVU> It will work perfectly then miss it once 7 good 2 bad 3 good 1 bad 15 good 1 bad etc etc etc
[20:37] <M0TVU> delay between bits
[20:38] <chrisstubbs> hmm
[20:38] <daveake> code plz
[20:38] <M0TVU> You really don't want to see this ...
[20:38] <M0TVU> hang on ...
[20:39] <daveake> If it's timing, then something (e.g. serial interrupts) are happening during the lost characters
[20:39] <daveake> But it's a bit of a coincidence it's the whole of a field
[20:39] <M0TVU> http://pastie.org/7165999
[20:39] <M0TVU> I agree - but its so random
[20:40] <daveake> Not very random. Always the same field.
[20:42] <M0TVU> The first field after the search for the delimeter. If it's missed the next delimeter will put lat in the place of time
[20:43] <fsphil> are you not testing for GPGGA?
[20:43] <M0TVU> So it's possible as that one missed delimeter could cause a real headache.
[20:43] <daveake> Do you have a scope? WaitUs 20000 is going to be too short because of the time taken to run the code.
[20:44] <M0TVU> WaitUs 2000 is a 50th of a second used between the tx bits for the rtty only = 50 baud
[20:45] <daveake> Yes but your code takes a non-zero amount of time to run
[20:47] <M0TVU> It has no reflection on ppulating the data_bye array. The sequence goes read GPS populate array, calculate the CRC send all the bits. In the meantime the GPS is still sending data. to prevent buffer overload the buffer is cleared at the start of every GPS read
[20:49] <M0TVU> Because of the RTTY the code runs about a 17second cycle. Obviously from the first send to the next I would have received 15 GPS messages which are being ignored
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[20:51] <M0TVU> Data running whilst i'm typing .... http://pastie.org/7166071
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[20:55] <daveake> Right. You're not sending the time. A full sentence is taking 17 seconds. If you look at the timestamps before/after a shortened sentence, they're closer than the 34 seconds they should be, by 2 seconds which is how long it would have taken to send the missing characters
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[20:59] <chrisstubbs> M0YVU what line is the time added to the datastring?
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[21:02] <daveake> send_time which isn't shown
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[21:04] Nick change: [1]chrisstubbs -> chrisstubbs
[21:09] <M0TVU> Hi again - The Gosubs are commented out. The data is put in one big array and spat out from there. I have found a fix. Very crude but I have counted the number of fields for a good sentence and if this is not made then read and populate he array again
[21:09] <M0TVU> Anyway gotta go catch you tomorrow night with more troubles .... ;-)
[21:10] <chrisstubbs> M0TVU night
[21:10] <M0TVU> nite
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[21:35] <Lunar_Lander> so
[21:35] <Lunar_Lander> what can we do now?
[21:35] <chrisstubbs> party?
[21:35] <chrisstubbs> i was thinking about your idea for the HABbouy river floater thing
[21:36] <chrisstubbs> the problem with tracking it would be the range of the low power transmitter that close to the ground
[21:36] <fsphil> you'd need gsm or satellite
[21:36] <kiwi_> What's that idea? If you don't mind telling.
[21:36] <fsphil> or HF
[21:36] <Lunar_Lander> xD
[21:37] <Lunar_Lander> chrisstubbs, yea
[21:37] <chrisstubbs> go on Lunar_Lander explain ;)
[21:37] <Lunar_Lander> ah to deploy a GPS tracker with sensors into a river
[21:38] <kiwi_> To measure stuff or just to track it?
[21:38] <Lunar_Lander> both :)
[21:38] <chrisstubbs> i went for a walk around with my tracker today to test it and the range was very poor on the ground, with the transmitter level with the river i doubt it would go far from the banks of the river
[21:38] <Lunar_Lander> yeah
[21:39] <chrisstubbs> but yeah HF could work
[21:39] <fsphil> shouldn't be that bad really
[21:39] <chrisstubbs> well i suppose if it was flat around the river it would be quite good
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[21:40] <Lunar_Lander> yea
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[21:44] <kiwi_> A tethered balloon could relay the data.. but not if you're going far I guess
[21:44] <Lunar_Lander> that is true
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[21:44] <fsphil> better get back to tidying up
[21:45] <chrisstubbs> fsphil, you can come help tidy up here when your done, been putting it off all week
[21:45] <chrisstubbs> :P
[21:46] <fsphil> I've been putting this off for about three months
[21:47] <Lunar_Lander> xD
[21:47] <ibanezmatt13> evening :)
[21:48] <ibanezmatt13> I've been trying to condense my code into two functions, 1 to read gps and 1 to send. It didn't go very well, so I reverted back to the original code in need of help :( https://gist.github.com/ibanezmatt13/5267671/edit
[21:49] <chrisstubbs> This spotify track blocker script is working a treat, goodbye one direction!
[21:49] <fsphil> isn't the point of spotify that you choose the music?
[21:50] <chrisstubbs> i like the chart playlists from time to time, but half of it is rubbish :P
[21:50] <chrisstubbs> ibanezmatt13, that link is dead
[21:50] <ibanezmatt13> sorry, try https://gist.github.com/ibanezmatt13/5267671
[21:53] <ibanezmatt13> http://aprs.gids.nl/nmea/#gga where i've said check for an A i don't think that I should be checking for an A in gpgga
[21:53] <ibanezmatt13> perhaps check for a 0?
[21:54] <chrisstubbs> yeah if its not 0 then it will have a fix
[21:55] <ibanezmatt13> i see, so I'll change that A to a 0
[21:55] <ibanezmatt13> you see, i wanted to have it still send info without a lock but just say that there isn't a lock. And also, I wanted to use functions to neaten it up a little
[21:56] <chrisstubbs> ok, is this code working then?
[21:56] <ibanezmatt13> I've not managed to test it out yet, I'm just writing in advance. Basically, I'm learning what each line of code does in readiness for putting it all together
[21:57] <chrisstubbs> ah ok. yeah it looks in order but you cant tell unless your have tested it!
[21:57] <ibanezmatt13> ok, how shall i go about putting it into functions
[21:57] <chrisstubbs> If you make the code remember the GPS fix, you can transmit that location regardless
[21:58] <chrisstubbs> however include another parameter in the output string such as a 1/0 indicating if the tracker has a fix, or if it is storing old data
[21:58] <ibanezmatt13> i see, i'll have a go
[21:59] <daveake> You've got the UBX commands before you've opened the serial port
[21:59] <ibanezmatt13> so in a function which reads the gps, shall i have an if statement which says: if data[2] == 0 then, lock == 0, elif data[2] != 0. then lock == 1
[21:59] <chrisstubbs> no idea about functions in python im afraid im not into it. However once you know how to define them. you should just be able to cut/paste the code in
[21:59] <ibanezmatt13> ok
[21:59] <ibanezmatt13> daveake: shall i open the serial before the loop as well
[22:00] <daveake> Well yes, otherwise it won't know what port to send to or what baud rate to use
[22:00] <chrisstubbs> well spotted dave, someones awake tonight :P
[22:00] <ibanezmatt13> ok, why do you use 9600 baud for gps and only 300 for radio. is baud rate like data transfer
[22:01] <daveake> UBlox runs at 9600
[22:01] <chrisstubbs> the ublox works at 9600 baud by defualt, its a common speed for serial
[22:01] <daveake> But the radio system won't work that fast
[22:01] <ibanezmatt13> is that the rate of data transfer or something
[22:01] <daveake> yes
[22:01] <ibanezmatt13> i see
[22:01] <mattbrejza> can you set the baud rate of the gps to 600 and attach it straight to a ntx2? :P
[22:01] <mattbrejza> (i would guess not)
[22:02] <daveake> no :)
[22:02] <daveake> ublox won't go that low
[22:02] <mattbrejza> 1200?
[22:02] <ibanezmatt13> after i set the baud rate for the gps, i made a 1 second timeout. Does that simply wait a second for the GPS to catch up
[22:02] <mattbrejza> (i could just look myself)
[22:03] <daveake> I've forgotten
[22:03] <mattbrejza> 4800 is lowest :(
[22:04] <daveake> Well you still need to add the payload ID
[22:04] <daveake> and then you need to recalc the CRC
[22:05] <daveake> and you don't want to use XOR8
[22:05] <daveake> So yeah you need a processor
[22:05] <mattbrejza> well you could always add a little program to connect to flidigi and send to habitat manually
[22:06] <mattbrejza> its just a because you can thing rather than a good idea
[22:08] <ibanezmatt13> https://gist.github.com/ibanezmatt13/5267671 where i have said lat = data[3] + data[4], and similar for lon, why have i done this? http://aprs.gids.nl/nmea/#gga how do i get the lat and lon in gga?
[22:09] <chrisstubbs> the latitude and the north/south are the 3rd anf 4th comma seperated values
[22:10] <chrisstubbs> but does python start array indexes from 1 or 0
[22:10] <ibanezmatt13> 0 i beleive
[22:10] <fsphil> it's rarely 1
[22:11] <chrisstubbs> in my mine that should be 2 and 3 instead od 3 and 4 then, correct me if im wrong
[22:11] <chrisstubbs> $gpgga = 0, time = 1, lat = 2, north = 3
[22:11] <ibanezmatt13> yeah, i just randomly selected numbers
[22:11] <ibanezmatt13> ill sort that
[22:11] <chrisstubbs> haha okay, hope that makes sense
[22:11] <ibanezmatt13> would you keep lat and north seperate or combine them
[22:12] <ibanezmatt13> into a variabke
[22:12] <fsphil> the N/S just signals if the number is a negative
[22:12] <fsphil> so no point keeping it separate
[22:13] <ibanezmatt13> so i'll do lat = data[2] + data[3]
[22:13] <ibanezmatt13> ?
[22:14] <fsphil> or use the value in data[3] to make data[2] a negative number, or not
[22:14] <ibanezmatt13> ok, thanks
[22:14] <fsphil> the gps coordinates are stored in a really weird way
[22:14] <ibanezmatt13> indeed
[22:14] <eroomde> http://i.minus.com/i5sWbHBEUICvN.gif
[22:15] <ibanezmatt13> eroomde: hmm
[22:15] <fsphil> that's me on ebay
[22:15] <fsphil> "just a bit longer.... "
[22:15] <fsphil> "ahh someone sniped me"
[22:20] <lz1dev> eroomde: http://i.imgur.com/UGtNBNs.gif
[22:20] <lz1dev> this is me watching gifs
[22:22] <chrisstubbs> hahahaha
[22:23] <fsphil> I can't believe it's 2013 and people are exchanging animated GIFs
[22:23] <fsphil> has there been a rupture in time?
[22:24] <ibanezmatt13> turn over to skyarts2
[22:24] <chrisstubbs> <marquee>WELCUME 2 2K13!!</marquee>
[22:24] <ibanezmatt13> fantastic program
[22:26] <fsphil> <blink>blink</blink>
[22:26] <chrisstubbs> i still have that cat gif open, and im still laughing.
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[22:30] <fsphil> imgur has a lot to answer for
[22:31] <lz1dev> http://i.imgur.com/7BDAfIH.gif
[22:34] <lz1dev> there are also serious gifs
[22:34] <lz1dev> for serious people
[22:37] <ibanezmatt13> https://gist.github.com/ibanezmatt13/5274154 reckon that'll work like https://gist.github.com/ibanezmatt13/5267671
[22:41] <chrisstubbs> if you have defined them right
[22:41] <chrisstubbs> you also need to do your loop forever thing and put
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[22:41] <chrisstubbs> read_gps(); seng_gps(); in there
[22:42] <ibanezmatt13> that's at the bottom
[22:42] <chrisstubbs> oh sorry missed that
[22:42] <ibanezmatt13> :)
[22:42] <chrisstubbs> one last thing
[22:42] <chrisstubbs> you need to close serial after time.sleep 3
[22:42] <ibanezmatt13> of course, forgot that
[22:42] <chrisstubbs> otherwise you open it again ontop of itself when you open the gps serial
[22:43] <ibanezmatt13> yep, ill sort it now
[22:43] <ibanezmatt13> done
[22:43] <chrisstubbs> cool, its coming together!
[22:44] <chrisstubbs> have you ordered a GPS and NTX2 yet?
[22:44] <ibanezmatt13> not yet, I'm going to very soon. It's just, my Dad wants me to concentrate on my summer exams.
[22:44] <ibanezmatt13> i will get probably the ntx2 first in the next 2 weeks or so
[22:44] <chrisstubbs> you may as well get both to save on postage
[22:45] <ibanezmatt13> so with the coupon codes i'm lloking at about £40 for all of it
[22:45] <ibanezmatt13> looking
[22:46] <chrisstubbs> yeah about £20 for each i remember, do you know which type of gps you need for the pi?
[22:46] <ibanezmatt13> i'm gonna get the Ublox 6. I'll get a link now
[22:46] <chrisstubbs> 5v/3.3v
[22:46] <ibanezmatt13> 3.3v
[22:47] <chrisstubbs> yeah :)
[22:47] <ibanezmatt13> http://ava.upuaut.net/store/index.php?route=product/product&path=59_60&product_id=51
[22:47] <chrisstubbs> that should be the one
[22:47] <ibanezmatt13> http://ava.upuaut.net/store/index.php?route=product/category&path=71_63 which out of the 434.65 and 434.075 shall i get. I don't suppose it really matters
[22:48] <chrisstubbs> nope, i got the .65, others use the 075
[22:49] <ibanezmatt13> I'll get the 650, it's a nicer number :)
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[22:49] <chrisstubbs> do you have a radio to use for receiving?
[22:49] <ibanezmatt13> one question...
[22:49] <ibanezmatt13> yep
[22:49] <fsphil> 42
[22:49] <ibanezmatt13> having looked at various shematics, none show how to connect the NTX2 to the Pi's serial.
[22:49] <ibanezmatt13> So, i have absolutely no idea how to connect it
[22:50] <chrisstubbs> good question
[22:50] <chrisstubbs> you will need some resistors
[22:50] <chrisstubbs> and a conversation with daveake :P
[22:50] <fsphil> you seen the one about connecting the ntx2 to the arduino?
[22:50] <fsphil> same deal
[22:50] <ibanezmatt13> I've not seen that, is it for serial though?
[22:51] <chrisstubbs> you dont have a mark and space pin on the pi, only tx for serial
[22:51] <ibanezmatt13> oh yes, i have seen that
[22:51] <ibanezmatt13> what about rx?
[22:51] <fsphil> you don't need two pins on the avr/arduino either
[22:52] <chrisstubbs> oh, my bad!
[22:52] <fsphil> the two pin thing was a bit of an oddity
[22:52] <fsphil> not sure where it came from
[22:52] <ibanezmatt13> :) so is there a schematic for that?
[22:52] <chrisstubbs> http://ukhas.org.uk/guides:linkingarduinotontx2
[22:53] <chrisstubbs> the resistors in that setup are for 5v, it may be different for 3v
[22:53] <ibanezmatt13> i looked at that but it only uses the pi's rx pin
[22:53] <daveake> tx
[22:54] <chrisstubbs> yes, you only need to send to the radio, it dosent say anything back
[22:54] <daveake> I thought Upu gave you the schematic on here a couple of days go
[22:54] <chrisstubbs> your just blasting out data, that it turns to radio waves
[22:54] <daveake> ago
[22:54] <ibanezmatt13> of course
[22:54] <ibanezmatt13> daveake: we need you!
[22:54] <daveake> nah
[22:54] <ibanezmatt13> connecting pi to radio transmitter?
[22:54] <fsphil> you have all you need :)
[22:55] <daveake> Like fsphil said it's in that diagram above. And like I said Upu already gave you the Pi schematic earlier this week
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[22:56] <ibanezmatt13> oh dear. i really should have kept that link :(
[22:56] <Willdude123> Hi dave
[22:56] <ibanezmatt13> damn
[22:56] <Willdude123> ibanezmatt13:Was it PMmed?
[22:56] <ibanezmatt13> im not sure
[22:57] <daveake> Use the Arduino circuit. The AVR pin is replaced by the Pi Tx pin. Job jobbed.
[22:57] <Willdude123> http://habhub.org/zeusbot
[22:57] <Willdude123> Have a look.
[22:57] <fsphil> the pi schematic at this point would just add confusion
[22:58] <fsphil> darren shaw
[22:58] <fsphil> er
[22:58] <fsphil> ignore me
[22:58] <ibanezmatt13> so on the arduino diagram, RXD1 goes to pi's TX pin?
[22:59] <chrisstubbs> yep
[22:59] <fsphil> the Pi's uart does all the signal generating
[22:59] <ibanezmatt13> what about the pi's rx pin. will that be used for gps?
[23:00] <daveake> yes gps
[23:00] <ibanezmatt13> will the gps need tx pin as well
[23:00] <daveake> yes
[23:00] <daveake> otherwise what will happen to those UBX commands you send to it?
[23:00] <ibanezmatt13> i'll cross that bridge when i come to it, i understand
[23:01] <ibanezmatt13> i'll have to go now good people. Thanks very much for the help
[23:01] <ibanezmatt13> :)
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[23:04] <Willdude123> Hows stuff Dave? I've been allowed to accept Ciemon's FCD and a HABamp from Upu.
[23:05] <Willdude123> daveake:Has PIE5 been built completely yet?
[23:05] <daveake> Sure has
[23:06] <daveake> and good btw :)
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[23:07] <Willdude123> Maybe I'll be allowed to do a payload in the distant future.
[23:08] <chrisstubbs> :)
[23:08] <chrisstubbs> result Willdude123
[23:08] <chrisstubbs> one step at a time
[23:08] <chrisstubbs> start playing with radio transmitters as a hobby, then GPS as an unrelated hobby and accidently combine the two
[23:09] <Willdude123> Heh.
[23:09] <chrisstubbs> while at the same time becoming a voulenteer party organiser with lots of balloons and helium
[23:10] <fsphil> nice side effect that
[23:10] <Willdude123> Then one day, accidentally tie two ropes together and link the two.
[23:11] <Lunar_Lander> xD
[23:13] <Willdude123> If a receiver and a transmitter are within 50m or so of each other, are ridiculously high baud rates possible?
[23:13] <Upu> you can do 1200 baud
[23:13] <Upu> but I wouldn't call it ridiculous
[23:14] <Willdude123> Well yeah.
[23:14] <Willdude123> Maybe I could make a wired mouse wireless with a pi.
[23:14] <Upu> Robots are cool http://i.imgur.com/qHN5z5n.gif
[23:14] <Willdude123> And the same for a keyboard.
[23:16] <Lunar_Lander> who of you did see the Japan Race on Top Gear?
[23:18] <chrisstubbs> Willdude123, just have to plug the pi into a usb port instead for power :P
[23:18] <chrisstubbs> Hey Upu
[23:18] <Upu> evening Chris
[23:19] <chrisstubbs> my smd board is working, transmitting, gps fix, flight mode and all :)
[23:19] <chrisstubbs> im a happy chappy
[23:19] <chrisstubbs> thanks for your help on it along the way
[23:19] <Upu> more than welcome
[23:19] <chrisstubbs> and to all the others that have helped
[23:19] <kiwi_> When are you flying it?
[23:20] <chrisstubbs> the smd board (CHEAPO) will be flying as a backup tracker with my main paylod (NSE) in april
[23:20] <Lunar_Lander> cool
[23:20] <chrisstubbs> the 13th if all goes according to plan
[23:20] <chrisstubbs> wind looks like a london landing for the first weekend of april, so thats out
[23:21] <kiwi_> Where do you launch from?
[23:21] <Lunar_Lander> jeremy clarkson's house
[23:21] <Lunar_Lander> XD
[23:21] <chrisstubbs> I have applied for permission to launch just south east of Chelmsford, Essex
[23:21] <kiwi_> Hmm.. not personally acquainted
[23:21] <Willdude123> I have a good idea.
[23:21] <Willdude123> A remote thermostat.
[23:21] <Lunar_Lander> cool
[23:22] <Willdude123> For my grandfather's greenhouse.
[23:22] <Willdude123> He uses a really inefficient bulb for heating it.
[23:22] <chrisstubbs> Willdude123, do you have any of those wireless sockets, they run on 434 and i have interfaced those with VB before and some cheap ebay transmitters
[23:22] <chrisstubbs> could work quite well with the pi in a project like that
[23:23] <chrisstubbs> 433.92 mhz sory not 434
[23:23] <Willdude123> Yeah, maybe arduino would be good.
[23:23] <Lunar_Lander> a serious question now
[23:23] <Lunar_Lander> is Darkside the only one so far who worked on the Vaisala RS-92?
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[23:27] <Willdude123> Maybe with an NTX2 and an NRX2 it'd work.
[23:28] <fsphil> the rfm22b would be cheaper
[23:28] <fsphil> and there's a pretty good library for transmitting and receiving
[23:28] <chrisstubbs> fsphil, did you crack the bridge between rfm22b and pi in the end?
[23:28] <fsphil> yea got it working, most of the time
[23:29] <fsphil> the rfm22b would sometimes stop responding
[23:30] <fsphil> but a reset command got it going again
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[23:31] <fsphil> in future I'll probably use the model A RPi directly on the robot
[23:31] <fsphil> then it can just use wifi
[23:31] <Lunar_Lander> is Darkside the only one so far who worked on the Vaisala RS-92?
[23:32] <kiwi_> I've only read about it.
[23:32] <Lunar_Lander> ah
[23:35] <Lunar_Lander> I doubt Vaisala would say something about how the sensors work
[23:35] <griffonbot> @NSEballoon: SMD tracker is now complete :) Just done a little write up about it: http://t.co/yO5YvmNWik Looking forward to April flight! #UKHAS [http://twitter.com/NSEballoon/status/317782171056234496]
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[23:39] <kiwi_> Lunar_Lander: Looking for any particular info?
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[23:41] <Lunar_Lander> yeah the thermometer
[23:42] <kiwi_> mikeselectricstuff said it was capacitive http://www.youtube.com/watch?v=xSxtwuTS5hw
[23:43] <kiwi_> Vaisala seems to have a lot of custom stuff
[23:44] <Lunar_Lander> yeah Professor Väisälä did a lot of R&D
[23:44] <Lunar_Lander> and of course that was still done by the others in the company
[23:45] <Lunar_Lander> kiwi_, cool, he seems to have the water battery
[23:45] <kiwi_> Väisälä, for real?
[23:45] <Lunar_Lander> yes
[23:45] <Lunar_Lander> they changed the name when they expanded to the US
[23:45] <kiwi_> Makes sense
[23:46] <kiwi_> They are huge
[23:46] <Lunar_Lander> yea
[23:46] <Lunar_Lander> I love the AUTOSONDE concept
[23:46] <Lunar_Lander> if it is what I think it is
[23:47] <Lunar_Lander> these containers which deploy weather balloons automatically
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[23:47] <kiwi_> Yes that's a neat thing.
[23:48] <kiwi_> From what I heard they're pretty advanced
[23:48] <kiwi_> Where do you live, Lunar_Lander?
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[23:49] <fsphil> the moon
[23:50] <Lunar_Lander> germany
[23:50] <Lunar_Lander> xD
[23:51] <kiwi_> The nick could allude to his company car ;)
[23:51] <kiwi_> Is it hard to get a launch permit in Germany?
[23:53] <Lunar_Lander> no, not really
[23:53] <Lunar_Lander> just have to give them like the ascent/descent rates and weights
[23:53] <Lunar_Lander> about two weeks in advance
[23:54] <kiwi_> Ok
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[23:55] <Lunar_Lander> yea
[23:55] <Lunar_Lander> and you are from?
[23:56] <kiwi_> Sweden
[23:56] <kiwi_> ...Earth
[23:57] <fsphil> seems to be a nice part of the Earth
[23:58] <kiwi_> There are worse places
[00:00] --- Sat Mar 30 2013