highaltitude.log.20140309

[00:00] <craag_M0DNY> Torq: I've got it :)
[00:01] <craag_M0DNY> Probably going to leave range of this websdr soon though
[00:01] <DL7AD> craag_M0DNY: how do we go on?
[00:01] <craag_M0DNY> I mean globaltuner
[00:01] <craag_M0DNY> websdr on the brain
[00:02] <Torq> theres some more in south france
[00:03] <DL7AD> in 6 hours it will be already 600km past its current position
[00:03] <craag_M0DNY> Torq: There are... but I need to get to bed :)
[00:03] <DL7AD> i already informed everyone in south france. but it will arrive there at 6 local time
[00:03] <Torq> sleep is for the weak
[00:04] <craag_M0DNY> lol Torq
[00:04] <DL7AD> ^^
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[00:20] <DL7AD> craag_M0DNY: blub!
[00:20] <craag_M0DNY> blub?
[00:20] <DL7AD> ^^ is like ping
[00:20] <craag_M0DNY> oh right
[00:20] <craag_M0DNY> errr
[00:21] <craag_M0DNY> blob!
[00:21] <DL7AD> :D
[00:22] <DL7AD> someone switched the modulation -.-
[00:25] <craag_M0DNY> grr
[00:30] <craag_M0DNY> I was really hoping this would be out of range so I could go to bed :P
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[00:37] <DL7AD> craag_M0DNY: hehe :P
[00:38] <Willdude123> Any flights tomorrow?
[00:38] <DL7AD> *shrug*
[00:41] <craag_M0DNY> Last 3 packets have been red - good night DL7AD !
[00:41] <DL7AD> craag_M0DNY: good night
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[00:58] <Laurenceb> SP9UOB battery is getting low
[00:58] <Laurenceb> whats the expected life?
[00:59] <DL7AD> dont know.... but its at 0.99v
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[01:05] <LeoBodnar> is it AA?
[01:07] <DL7AD> no idea
[01:08] <DL7AD> thats the purpose of websites :P
[01:12] <DL7AD> got another websdr :P
[01:18] Action: Laurenceb zzz
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[01:32] <g0pai_ian_> Gnit all. Torq, sleep may be for the weak, but it sure helps sort C coding.
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[05:27] <7JTAAI9KY> hey, can I just do CRC and not CRC16 for the checksum
[05:27] <7JTAAI9KY> wht
[05:27] Nick change: 7JTAAI9KY -> Joel_re
[05:33] <Joel_re> whats the initial polynomial value
[05:33] <Joel_re> that is to be used in the CRC16_CCITT
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[06:07] Action: SP9UOB-Tom is gone. Gone since Fri Mar 7 22:13:00 2014
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[06:49] <SP9UOB-Tom> morning
[07:09] <SP9UOB-Tom> France! Spain! Wake up :-)
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[07:18] <x-f> morning, Tom
[07:19] <x-f> you could alert the mailing list now
[07:19] <Joel_re> hey, is it ok to not use CRC16
[07:19] <Joel_re> http://bpaste.net/show/186698/
[07:19] <Joel_re> does that look right?
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[07:22] <x-f> we have Nuno in Portugal, btw
[07:23] <x-f> SP9UOB-Tom, what is the expected battery life?
[07:25] <SP9UOB-Tom> x-f: just posted to the group
[07:26] <SP9UOB-Tom> x-f: about 30 hours, but in -5 Celcius
[07:26] <SP9UOB-Tom> x-f: so sightly less than 30 hours ;-)
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[07:27] <SP9UOB-Tom> F6HTJ
[07:28] <SP9UOB-Tom> F6HTJ is nearby, but im suspecting that he's sleeping
[07:31] <qyx_> Joel_re: probably yes, compare the results with other implementations.. and don't use globals
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[07:42] <jcoxon> morning
[07:42] <jcoxon> oooo a pico long duration...
[07:42] <jcoxon> what are the details?
[07:43] <eroomde> jcoxon: got house
[07:44] <jcoxon> eroomde, congratulations
[07:51] <SP9UOB-Tom> jcoxon: 144.250 MHz 100 bd/600 Hz 7n1
[07:52] <jcoxon> SP9UOB-Tom, had a quick listen on the Barcelona GT
[07:52] <jcoxon> couldn't hear anything
[07:52] <SP9UOB-Tom> jcoxon: APRS is reporting, that tracker is in good condition
[07:53] <jcoxon> cool
[07:53] <jcoxon> well lets hope some listeners wake up
[07:53] <Joel_re> is the \n included in the checksum?
[07:54] <SP9UOB-Tom> Joel_re: no
[07:54] <Joel_re> ok, thanks
[07:54] <SP9UOB-Tom> You have to stop crc just before *
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[08:00] <Joel_re> yep, thanks
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[08:14] <SP9UOB-Tom> f5vnf: morning !
[08:14] <SP9UOB-Tom> f5vnf: 144.250 MHz USB
[08:14] <f5vnf> morning just seen your email am in process of setting up for 2mtrs
[08:15] <SP9UOB-Tom> f5vnf: cool :-) Thanks
[08:15] <f5vnf> whats the tramsmit timeline
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[08:17] <SP9UOB-Tom> f5vnf: Morse HI every 4 seconds (low power) then every 30 seconds RSID and RTTY
[08:18] <SP9UOB-Tom> f5vnf: its on 144.250 MHz (dial)
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[08:23] <SP9UOB-Tom> f5vnf: are You receiving any signals ?
[08:30] <f5vnf> am hearing it faintly on my yeasu in the car but am struggling to get it to the rdl
[08:30] <f5vnf> yeasu only has small whip
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[08:33] <SP9UOB-Tom> F6HTJ is decoding :)
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[08:44] <malgar> woooo
[08:44] <malgar> great sp9uob
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[08:50] <SP9UOB-Tom> thanks, im wondering whats happen after prome meridian crossing. Should be ok, but was never tested
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[08:51] <jcoxon> SP9UOB-Tom, not something you usually have to worry about
[08:51] <jcoxon> any hysplit predictions?
[08:52] <SP9UOB-Tom> jcoxon: i havent any hysplit prediction
[08:52] <SP9UOB-Tom> for this flight
[08:53] <mikestir> i ran one earlier (which is not to say I ran it with the right settings!): http://ready.arl.noaa.gov/hypubout/184311_trj001.gif
[08:53] <jcoxon> just running one now
[08:54] <jcoxon> http://ready.arl.noaa.gov/hypubout/184484_trj001.gif
[08:54] <jcoxon> bbl
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[08:54] <SP9UOB-Tom> jcoxon: thanks, interesting.
[08:55] <SP9UOB-Tom> jcoxon: battery should survive till the sunset
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[09:10] <mclane> SP9UOB just crossing the approach path of Toulouse airport ;-)
[09:15] <f5vnf> sp9u0b stupid rdl doesnt hear it but 5/ 9 on yeasu , just going to set up it up in shack
[09:15] <SP9UOB-Tom> f5vnf: cool, thanks
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[09:18] <ibanezmatt13> Morning all, would I be ok uploading to spacenear today to test the tracker before next weekend's flight?
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[09:23] <ibanezmatt13> If anybody objects let me know, I'll take it down np
[09:29] <ibanezmatt13> Is there any reason dl-fldigi wouldn't upload to Habitat if online is ticked and the data I'm getting is 100% right but it doesn't go green?
[09:30] <Torq> thought the flight had to be approved first or something?
[09:30] <mfa298> if it's not green in dl-fldigi I think that means the checksum failed, that should even happen without a payload doc
[09:31] <mfa298> I think anything that looks like a string gets uploaded - although won't be displayed unless it's valid and has a matching payload doc.
[09:31] <ibanezmatt13> That's somewhat concerning. It's not coming through the parser. Let me try another PC
[09:32] <craag_M0DNY> ibanezmatt13: You in HAB mode?
[09:32] Nick change: craag_M0DNY -> craag
[09:32] <ibanezmatt13> erm, one sec
[09:32] <ibanezmatt13> think so, using dl for hab
[09:33] <mfa298> can't see anything in logtail
[09:33] <craag> Any messages at the bottom ibanezmatt13 ?
[09:33] <ibanezmatt13> no
[09:33] <craag> Post a screenshot?
[09:34] <ibanezmatt13> I'll just try it on this other PC craag and if it doesn't work I'll run a join.me
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[09:37] <ibanezmatt13> I didn't have the leading $$ in front of the callsign, false alarm :P
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[09:41] <mfa298> always good when it's a simple mistake like that.
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[09:57] <f5vnf> ok so i have the two bars over the two lines and the bar on right goes to the top in green but i dont get decode
[09:58] <SP9UOB-Tom> f5vnf: could You turn RSID on ?
[09:58] <SP9UOB-Tom> f5vnf: http://sp9uob.verox.pl/pliki/rsid.png
[09:59] <SP9UOB-Tom> or manually set: from the FLIGHT bar: SP9UOB and then click autoconfigure
[09:59] <craag> Also widen the modem filter for rtty to 100hz
[09:59] <craag> As autoconfigure doesn't do that yet
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[10:00] <DL7AD> good morning
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[10:01] <DL7AD> SP9UOB-Tom: morning!
[10:01] <craag> f5vnf: If none of this works, posting a screenshot may help us find the problem.
[10:03] <SP9UOB-Tom> DL7AD: hi Sven
[10:04] <DL7AD> in my opinion this has been the best screenshot to show how to configure dl-fldigi basically http://ukhas.org.uk/_media/guides:selecting.jpeg?cache=
[10:04] <DL7AD> SP9UOB-Tom: does your balloon have a single AAA cell?
[10:05] <SP9UOB-Tom> DL7AD: yes one AAA Energizer lithium
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[10:06] <DL7AD> SP9UOB-Tom: does the transmitter transmit everytime? cw rtty aprs together....?
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[10:07] <SP9UOB-Tom> DL7AD: no, there is low power CW "HI" every 4 seconds, then every 60 seconds it transmitting RSID + RTTY
[10:08] <SP9UOB-Tom> in the gaps it transmit APRS
[10:08] <DL7AD> high power = 100mW or 10mW?
[10:09] <Torq> great set up. wondering if theres any balloon code somewhere to use.
[10:09] <SP9UOB-Tom> low power = below 0.5 mW (cant measure it :-))
[10:10] <DL7AD> Torq: there're many sources
[10:10] <SP9UOB-Tom> RTTY about 3-5 mW
[10:10] <SP9UOB-Tom> APRS 15 mW
[10:11] <DL7AD> SP9UOB-Tom: that consumes more than the gps, doe it?
[10:13] <SP9UOB-Tom> DL7AD: ??
[10:14] Action: SP9UOB-Tom will be back in 1h:30 - kids walk :-)
[10:14] <DL7AD> the transmitter consumes more power than the gps.
[10:15] <mfa298> Torq: there's some guides on the wiki but a lot can vary depending on what platform you're using.
[10:15] <mfa298> Torq: also if you're in the UK we can't use APRS airborne
[10:15] <Torq> mfa298: super cheap ideally.
[10:15] <SP9UOB-Tom> DL7AD: yes, but it is working for short periods only
[10:16] <fsphil> excellent float SP9UOB-Tom
[10:16] <Torq> looks like its slowing down
[10:16] <mfa298> there's a few guides on the wiki about doing rtty with the arduino and some guides on interfacing with a gps, you then just need to stitch the parts together.
[10:17] <Torq> what no balloon kit in one ebay order?
[10:17] <mfa298> the aim is that you learn a bit about what you're doing as you put it together. Hopefully that means you also learn a bit about the legal aspects as well.
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[10:18] <mfa298> there maybe a couple of buy it all in one go options but they're going to be much more expensive than doing it yourself.
[10:19] <malgar> iwhere do you buy the balloons? I'll launch in May but I have to strat thinking about it
[10:19] <malgar> latex balloons
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[10:19] <craag> malgar: http://randomsolutions.co.uk/Random_Aerospace/Balloons.html
[10:19] <Torq> you can get them from randall
[10:20] <Torq> 3.95 - a bargain
[10:20] <mfa298> what craag said - he beat me to it.
[10:21] <mfa298> Torq: those are just small foil party balloons - good for very light payloads going to no higher than 10km. Latex balloons get more expensive depending on the size.
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[10:29] <f5vnf> hi chaps screenshot here ( i think) [IMG]http://i59.tinypic.com/2lkfyav.jpg[/IMG]
[10:30] <malgar> as camera I'm thinking about a gopro
[10:30] <malgar> could you suggest cheaper cameras that could work well?
[10:31] <craag> f5vnf: Move the signal to the middle of the passband (re-tune the receiver)
[10:31] <mfa298> f5vnf: you may want to retune the radio slighty so the rtty is nearer the centre of the waterfall.
[10:31] <mfa298> I'm obviously being slow today :p
[10:31] <craag> f5vnf: Also turn down the audio so the diamond down in the bottom left is just green.
[10:32] <craag> *bottom right
[10:32] <craag> not red.
[10:33] <f5vnf> yahoooooo thanks guys
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[10:34] <craag> no problem :)
[10:35] <f5vnf> dial freq 4251.1
[10:36] <f5vnf> 144.251.1
[10:37] <craag> malgar: We've used contour cameras for video with success
[10:38] <craag> If you just want photos though, a cheap canon camera is more than enough
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[10:42] <g0pai_ian_> Has anyone used an 808 key cam #16 at altitude with any success, modified or otherwise ?
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[10:43] <Geoff-G8DHE> SP9UOB is 1214Kms so far looking good http://360.g8dhe.net/HAB_Flights/2014_Flights/SP9UOB_20140308/
[10:43] <mclane> stay away from that!
[10:43] <craag> g0pai_ian_: I've used one on a pico up to 3500m, unmodified, didn't have any of the GPS issues others have mentioned. Can't tell you anything about the video though as it's still in a tree...
[10:43] <mclane> 808 cams seriously disturb gps
[10:44] <mclane> nearly lost one payload due to this
[10:44] <craag> I got a fake one first, that caused GPS issues. But the genuine one caused no problems at all.
[10:45] <mclane> otherwise - it works
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[10:45] <craag> One of anthony's chip-antenna breakout got a cold lock perfectly fine with the running camera sitting on the antenna.
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[10:51] <f5vnf> time to go for my village repas ( vietnamese this time ) but will leave the rig running bbl
[10:51] Nick change: f5vnf -> f5vnf_
[10:55] Nick change: sulky_ -> sulky
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[11:02] <g0pai_ian_> Thanks on the camera thoughts. I guess that it rates a lot of subjective config testing to avoid a potential problem area.
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[11:07] <jdtanner> Morning, any UK flights today?
[11:08] <Geoff-G8DHE> None announced :-(
[11:08] <jdtanner> Bummer...such a lovely day as well!
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[11:08] <Geoff-G8DHE> I think the next few weekends look promising from the comments this week
[11:09] <jdtanner> Fingers crossed...David (the other half of PeakSky) has just built his first Yagi and it needs testing ;)
[11:09] <Geoff-G8DHE> SP9UOB might be a bit much for a first test then ;-)
[11:10] <jdtanner> haha...possibly ;)
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[11:16] <fsphil> possible floater from here in two weeks time
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[11:24] <SpeedEvil> I just launched a floater.
[11:24] <SpeedEvil> But it flushed eventually.
[11:24] <LeoBodnar> oh dear
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[11:27] <Babs_> leobodnar - a quick q on the byte breakdown on the nav-pvt string if thats ok?
[11:28] <LeoBodnar> sure
[11:28] Nick change: polde___ -> polde
[11:28] <Babs_> so i am polling, pulling out and checking that the nav-pvt string is as it should be, which is all working ok
[11:29] <Babs_> pulling out time and date in terms of month and days is ok
[11:29] <Babs_> but when the year is pulled out, it is spread across 2 bytes, and neither seems to have any relation to the year 2014
[11:30] <LeoBodnar> hmm can you post hex values that you get
[11:30] <Babs_> is there a conversion i should be doing?
[11:31] <Babs_> 2 secs, just set it up i will get a lock and then post it
[11:31] <LeoBodnar> maybe first 20 bytes of the message
[11:32] <LeoBodnar> 2014 = 0x07DE
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[11:43] <Babs_> leobodnar - that's exactly what i got
[11:43] <Babs_> i think my error (which i have to work out in my head) is that i figured by pushing it out to decimal i should get the same result?
[11:44] <LeoBodnar> yes
[11:44] <Babs_> so decimal i get 7 and 222
[11:44] <LeoBodnar> convert to decimal and do A*256+B
[11:44] <Babs_> ahh, i thought it would automatically convert
[11:44] <Babs_> that will be why my latitude and longitude is stable but wrong too
[11:45] <Babs_> all the strings look as if they read right to left i think?
[11:45] <LeoBodnar> yeah if you are going through decimal conversion you need to do that too
[11:45] <LeoBodnar> yes bytes containing smaller digits come first
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[11:45] <Babs_> so it latitude is 4 bytes x, x+1, x+2 and x+3 then the latitude is x+3, x+2, x+1, x where each of the elements have to be multiplied by the appropriate multiple of 16?
[11:46] <LeoBodnar> little endian format
[11:46] <Babs_> yes. thanks
[11:46] <Babs_> each element is 256 times the previous one?
[11:46] <LeoBodnar> yes
[11:47] <Babs_> so (x+3)*256^3+(x+2)*256^2 + (x+1)^256 + x is the result
[11:47] <LeoBodnar> yes but (x+1)*256
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[11:48] <Babs_> sorry yes, slip of my shift and 7 key.
[11:48] <LeoBodnar> or you can write it as ((a*256+b)*256+c)*256+d
[11:54] <Babs_> yes. a smarter way of doing it
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[12:20] <fsphil> or bit shift it
[12:20] <fsphil> which is a bit tidier imo
[12:24] <LeoBodnar> it depends on your level :D
[12:26] <LeoBodnar> did i just sneak a pun in there?
[12:28] <daveake> just a bit
[12:28] <daveake> do carry on :)
[12:30] <mfa298> what's the most significant bit, helping people or getting puns in ?
[12:32] <fsphil> please let it endian
[12:34] <LeoBodnar> right, shift it
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[12:35] <fsphil> or what?
[12:36] <daveake> he might operate on you
[12:36] <LeoBodnar> || else
[12:37] <mfa298> hopefully there's no register of those doing bad puns
[12:37] <LeoBodnar> is SP9OUB slightly indecisive?
[12:38] <fsphil> they tend to accumulate
[12:39] <LeoBodnar> i need to nibble some cookie
[12:40] <Geoff-G8DHE> Oh dear SP9UOB has a meridian problem! APRS has him flying West-correct, whilst rtty has him flying East-wrong!
[12:40] <LeoBodnar> looks like it
[12:40] <daveake> oop
[12:40] <daveake> s
[12:40] <LeoBodnar> i don't think Tom has ever been that far
[12:41] <LeoBodnar> well his hardware
[12:41] <Geoff-G8DHE> No he was wondering about it earlier!
[12:41] <Geoff-G8DHE> missing the sign I guess
[12:41] <LeoBodnar> he should have checked at the conf :D
[12:41] <daveake> :)
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[12:42] <daveake> SP9UOB-Tom
[12:42] <daveake> should be SP9UOB+Tom
[12:42] <daveake> :)
[12:42] <SP9UOB-Tom> hehehe
[12:43] <SP9UOB-Tom> sorry my fault :-)
[12:43] <LeoBodnar> I hope we will have lots of fun debugging code crossing international date line
[12:43] <daveake> You're not the first!
[12:43] <fsphil> And certainly won't be the last
[12:43] <daveake> nope
[12:43] <LeoBodnar> i bet
[12:43] <SP9UOB-Tom> anyway first polish baloon on western hemisphere :-)
[12:49] <SP9UOB-Tom> does habitat has option to fix sign of the latitude :) ?
[12:50] <fsphil> is this the bug that will correct itself when it gets to -1 ?
[12:50] <SP9UOB-Tom> fsphil> is this the bug that will correct itself when it gets to -1 ?
[12:51] <SP9UOB-Tom> fsphil:sorry
[12:51] <SP9UOB-Tom> fsphil: well - not sure, have to check in the code :-)
[12:51] <SP9UOB-Tom> APRS is reporting OK
[12:52] <SP9UOB-Tom> so formatting is the problem
[12:52] <Geoff-G8DHE> Could be as simple as missing the sign ?
[12:53] <daveake> Maybe ask in #habhub if someone can do a hot fix
[12:55] <SP9UOB-Tom> stupid mcc18 compiler has not implemented %f formatting
[12:55] <SpeedEvil> %f is a _hideous_ amount of code for an embedded platform.
[12:55] <SpeedEvil> There is probably a printf_f or something - with floating point support.
[12:56] <daveake> or use dtostrf
[12:56] <SpeedEvil> or that
[12:56] <SpeedEvil> Or don't use floating point
[12:56] <SP9UOB-Tom> nope, im doing it that way
[12:56] <SP9UOB-Tom> lonlWhole=(long)((float)pos.declon);
[12:56] <SP9UOB-Tom> lonulPart=(long)((float)pos.declon*100000)-lonlWhole*100000;
[12:56] <SP9UOB-Tom> lonulPart=abs(lonulPart);
[12:57] <fsphil> there's your bug
[12:57] <daveake> yup
[12:57] <SP9UOB-Tom> no abs() is only for decimal part
[12:57] <fsphil> the first line
[12:57] <daveake> and ...
[12:58] <daveake> -0.3 is still -0.3 even though it's just the fractional part that's -ve
[12:58] <SP9UOB-Tom> daveake: yes, but when displayed with printf it gives 0.-03 :-)
[12:59] <SP9UOB-Tom> daveake: yes, but when displayed with printf it gives 0.-3 :-)
[12:59] <SP9UOB-Tom> to be precise
[12:59] <fsphil> what happens when you split your -0.3 into -0 and 3
[12:59] <SP9UOB-Tom> it should be ok when crossing -1 deg
[12:59] <daveake> Best IMO, if you're doing it this way, is to grab the E/W part then apply "-" after the calcs
[12:59] <fsphil> you can't have -0
[13:00] <SP9UOB-Tom> fsphil: yup
[13:01] <fsphil> I did the very same thing
[13:02] <fsphil> caught it just before the launch
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[13:06] <LeoBodnar> lol
[13:06] <LeoBodnar> why not if (negative) {print "-"; a = -a; print a}
[13:07] <fsphil> in my snprintf() I have a (lat < 0 ? "-" : "")
[13:07] <fsphil> lat being a fixed point value
[13:08] <fsphil> so much easier than having floating point values
[13:08] <LeoBodnar> i mean where a is coming as integer from ublox
[13:09] <LeoBodnar> this is not rational
[13:10] <Oddstr13> don't you get it as a string from the GPS?
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[13:17] Nick change: SP9UOB-Tom -> SP9UOB
[13:17] Nick change: SP9UOB -> SP9UOB\
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[13:18] Nick change: SP9UOB\ -> _abs
[13:18] <_abs> doesnt work ;-)
[13:18] Nick change: _abs -> abs_SP9UOB_
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[14:14] <Laurenceb> did SP9UOB die?
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[14:15] <Geoff-G8DHE> No its run out of range I think, the rtty has a meridian problem and APRS reports are thin on the ground
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[14:57] <abs_SP9UOB_> its entering Spain by now :-)
[14:57] <Geoff-G8DHE> Getting verey close!
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[15:02] <Geoff-G8DHE> 1846Km so far to Spanish border! http://360.g8dhe.net/HAB_Flights/2014_Flights/SP9UOB_20140308/index.php?ind=1
[15:03] <abs_SP9UOB_> some spanish hams with receivers would be very appreciated
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[15:04] <abs_SP9UOB_> it is in Spain by now
[15:04] <Geoff-G8DHE> Its there on APRS
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[15:10] <malgar> _crc_xmodem_update << is this coming from <util/crc16.h> ?
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[15:16] <fsphil> yea
[15:17] <fsphil> a generic C version is listed at http://www.nongnu.org/avr-libc/user-manual/group__util__crc.html#gaca726c22a1900f9bad52594c8846115f
[15:17] <keydash> hwllo
[15:21] <fsphil> yo
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[15:28] <Babs_> afternoon all - quick q, presumably my number definitions are going wrong somewhere but in my code debug_serial.println(pollreturn[11],DEC); returns 7
[15:29] <Babs_> but year = (pollreturn[11],DEC); returns 10 if i print out year
[15:30] <Babs_> as in debug_serial.println(pollreturn[11],DEC); returns 10
[15:30] <Babs_> sorry, i mean debug_serial.print(year); returns 10,
[15:30] <Babs_> year is defined as an int
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[15:35] <fsphil> so a value reutrns 7, but if you assign that value to another variable and print it - you get 10?
[15:37] <Babs_> fsphil http://pastie.org/8901013
[15:37] <fsphil> you can't do that
[15:37] <fsphil> you need "year = pollreturn[11];"
[15:38] <Babs_> how does it cope with the fact that pollreturn[11] is in hex?
[15:38] <fsphil> it's not
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[15:38] <Babs_> how come?
[15:38] <fsphil> I'm guessing pollreturn is an unsigned char
[15:38] <Babs_> ahhh. pollreturn is uint_8
[15:39] <fsphil> the value will simply be an unsigned char, the 11'th in the array
[15:39] <fsphil> I'm not entirely sure what the () is doing there
[15:40] <fsphil> returning a pointer maybe?
[15:41] <fsphil> ah, it's returning the right most value
[15:41] <Babs_> ? don't know. so the uint_8 is a variable of a certain type, and i choose in the serial.print(pollreturn[11],DEC) to just convert it to a decimal on the fly?
[15:41] <fsphil> so DEC must == 10
[15:42] <fsphil> serial.print() takes two arguments, the first one being the value and the second one telling it how to print it
[15:42] <Babs_> yes, i think so. if i do serial.print[111],HEX) it prints out the hex equivalent
[15:43] <fsphil> yes
[15:43] <fsphil> well, .print(111, HEX)
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[15:44] <Babs_> yes. the modification works fsphil, thanks loads. sorry, this is all a bit new to me. having fun though.
[15:44] <fsphil> np. I've learned a bit about C too :)
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[15:46] <Babs_> actually, not really too far away from what i need to do now. once i can pull in the gps co-ordinates, then i can work out a bearing in x,y and z , output a corresponding proportional voltage between 0 and 5 to each to the brushless motor controller (which points each motor between 0 and 360 degrees based on a voltage between 0 and 5 volts) and i should be done
[15:47] <Babs_> *in theory*
[15:47] <Geoff-G8DHE> :-)
[15:50] <malgar> I'm still studying the example code for rtty transmission through arduino and ntx2. I understand how the crc is formed and added to the string, but how to verify it on the ground? does dl-fldigi verify by itself? how?
[15:52] <fsphil> it extracts lines that start with $$callsign and end with a newline character
[15:52] <fsphil> then repeats the exact same CRC calculation
[15:52] <fsphil> on the text between $$ and *
[15:52] <fsphil> it should match the last four digits of the line
[15:53] <fsphil> if not then one or more characters are incorrect
[15:53] <malgar> ok, I have to check by myself or is there an automatic warning?
[15:53] <fsphil> it's automatic
[15:54] <malgar> ok
[15:54] <malgar> my two launches will be in two months but I feel quite anxious putting everything together :D
[15:56] <f5vnf_> \nick f5vnf
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[15:57] <malgar> I also would like to try an high fps video tranmission in the firsts 1-2 km using hdspa connection
[15:57] <Geoff-G8DHE-M> malgar, the checksum field will say GOOD or BAD and the telemetry will be GREEN or RED
[15:58] <malgar> perfect
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[15:58] Nick change: cuddykid_ -> cuddykid
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[16:02] <Torq> where is sp9uob headed? i was kind of expecting it to track north by now.
[16:06] <malgar> Torq: http://ready.arl.noaa.gov/hypubout/184484_trj001.gif
[16:07] <Torq> so it -should- track to northern france before long
[16:11] <malgar> Torq: where are you from?
[16:11] <Torq> UK
[16:13] <Torq> http://ready.arl.noaa.gov/hypubout/trajplot_192125.pdf
[16:13] <Geoff-G8DHE-M> Its changed a bit since this morning http://ready.arl.noaa.gov/hypubout/192148_trj001.gif
[16:14] <DL7AD> good afternoon :)
[16:14] Nick change: DL7AD -> AF5LI
[16:14] <abs_SP9UOB_> DL7AD: afternoon
[16:14] <AF5LI> hi Tom :) abs_SP9UOB_
[16:15] <abs_SP9UOB_> abs(SP9UOB) :-)
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[16:15] <StudentDeNayer> Hi, is it possible to connect a atmega 328 directly to a sd with only a http://be.farnell.com/molex/502702-0891/memory-card-connector-microsd-8pos/dp/1614639 ?
[16:16] <AF5LI> no
[16:16] <AF5LI> but i have no idea how to handle it
[16:16] <Torq> http://ready.arl.noaa.gov/hypubout/trajplot_192189.pdf could go north or south off spain
[16:17] <AF5LI> ping Upu UpuWork
[16:18] <AF5LI> StudentDeNayer: Upu could know some chips which can handle SD cards
[16:18] <zyp> StudentDeNayer, yes, assuming that the atmega is running at 3.3V
[16:19] <zyp> SD cards supports SPI mode which you can use directly from an atmega
[16:19] <StudentDeNayer> Thanks and how important is stability of the voltage to the sd ?
[16:20] <SpeedEvil> It's likely got an internal regulator to 1.6 or 1.8.
[16:20] <SpeedEvil> So - ...
[16:20] <SpeedEvil> I suspect many SD cards will 'boot' at lower than 3.3
[16:22] <Upu> hi AF5LI
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[17:06] <abs_SP9UOB_> over 26 hours from AAA :-)
[17:07] <SpeedEvil> :)
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[17:22] <AF5LI> is it important to transmit the time by the tracker? i mean, that make no difference because we know how late it is and to separate every packet, we are using an incremental number
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[17:27] <Lunar_Lander> hello
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[17:33] <Geoff-G8DHE> You won't be able to calculate speed if the time isn't included, and given that we tend to plot most things against time it sure helps!
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[17:37] <mfa298> the sequence number might get repeated (payload reboots or the couter wraps around - I think at least one payload used uint_8 for the counter) so time helps in those cases as well
[17:40] <craag> A couple of people have used int_16 as well
[17:41] <AF5LI> hm okay... th
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[17:45] <Geoff-G8DHE> SP9UOB Tom what voltage does the system work down to ?
[17:51] <Geoff-G8DHE> Looks like it will go past 2000Km at this rate its at 1933Kms so far http://360.g8dhe.net/HAB_Flights/2014_Flights/SP9UOB_20140308/SP9UOB_201403091750.jpg
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[18:10] <keydash> which is the best size for a payload?
[18:10] <jcoxon> keydash, the smaller and lighter the better
[18:11] <keydash> smaller hmmm ok
[18:11] <jcoxon> well it means you need less gas (so cheaper)
[18:11] <keydash> it will have a canon a490, tracker, 6AAA and mjaybe a backup gps
[18:11] <jcoxon> its safer as when it falls its not going to as damaging
[18:12] <keydash> hopei can targe it to about 600g
[18:12] <jcoxon> thats a good aim
[18:13] <keydash> then the parachute will be about 42 inches?
[18:13] <jcoxon> http://wiki.ukhas.org.uk/guides:parachute_sizing_chart
[18:14] <keydash> seemsi can choose the 38 inches
[18:15] <keydash> but in that table
[18:15] <keydash> i should consider the weight of the remains of the ballon?
[18:18] <jcoxon> well its difficult to judge
[18:18] <jcoxon> how much will be left
[18:19] <SpeedEvil> It can be none, or it can be all of it.
[18:19] <SpeedEvil> There seems to be no good way to judge.
[18:19] <keydash> but it can makes the difference
[18:20] <jcoxon> keydash, my suggestion is to use the graph and aim for the slow descent
[18:20] <jcoxon> they'll cope hopefully with any remaining balloon
[18:20] <SpeedEvil> If you absolutely positively have to know - you can cut down.
[18:21] <craag> Getting a cutdown that absolutely works though is an endeavour in itself
[18:23] <SpeedEvil> :)
[18:23] <keydash> 42 inch then
[18:23] <Lunar_Lander> I can confirm that
[18:24] <craag> Sounds a good plan keydash
[18:24] <Lunar_Lander> keydash, https://www.youtube.com/watch?v=Z8IM90XOrQ4
[18:25] <keydash> 3 more AAA....
[18:25] <keydash> having battery issues
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[18:31] <abs_SP9UOB_> mission is over
[18:37] <x-f> quite a flight to the West
[18:40] <fsphil> stopping the importer
[18:42] <abs_SP9UOB_> and prime meridian crossing :-)
[18:42] <abs_SP9UOB_> fsphil: thanks
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[18:46] <Torq> battery expired?
[18:47] <Lunar_Lander> abs_SP9UOB_, cool!
[18:47] <Torq> impressive run
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[18:55] <abs_SP9UOB_> Torq: yes, drained
[19:03] <AF5LI> in trying to separate some code. i need Serial (arduino) in an external file which is not available.... does anyone know how to fix this error?
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[19:34] <malgar> abs_SP9UOB_: very good mission! :) your balloon passed almost over my location
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[19:35] <keydash> the payload must be squared in order to avoid looping?
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[19:37] <mjholmes> evening
[19:38] <mjholmes> i've just registered on the wiki (mjholmes) when someone gets a minute could i get edit rights please
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[19:43] <Lunar_Lander> the link posted about the stratosphere conference in the US on the mailing list is interestging
[19:43] <Lunar_Lander> interesting
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[20:15] <amell> is this worth getting? http://www.ebay.co.uk/itm/2m-70cm-144-430MHz-Micro-Mount-Ham-Radio-Mobile-Antenna-/370798985046?pt=UK_Mobile_Phones_Communication_Radio_Antennas&hash=item5655577f56
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[20:16] <amell> 2.15dBi @ 2m, 6.15dBi @ 70cm
[20:17] <abs_SP9UOB_> malgar: thank You :-)
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[20:25] <mikestir> amell: get it from CPC, it's cheaper
[20:25] <mikestir> http://cpc.farnell.com/watson/wsm-270/wsm-270-mini-mag-antenna/dp/IT44456
[20:28] <amell> ordered. thanks
[20:28] <jcoxon> ping eroomde
[20:29] <mikestir> amell: and yes, it's fine. I find it at least as good as a longer centre loaded 2/70 one I've got
[20:29] <fsphil> the magnet is pretty good too
[20:29] <fsphil> I've never had it move or fall off the car
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[20:30] <amell> yeah, but won't be in the car. this is for loft mount
[20:30] <mikestir> you'll need a decent ground plane for it then
[20:31] <amell> http://cpc.farnell.com/moonraker/12-130/antenna-mobile/dp/AP01510
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[20:32] <mikestir> a broadband antenna like that will never be as good as a resonant one if you want it specifically for hab tracking
[20:32] <amell> point taken
[20:33] <mikestir> but even if you want it for scanning, I find my X30 (2/70 base) still does airband better than a discone
[20:33] <amell> http://cpc.farnell.com/watson/wsma-450/wsma-450-low-profile-antenna/dp/IT44461 looks v strange!
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[20:34] <mikestir> gain so low they don't even quote it
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[20:58] <parabyte> hi i know little about this subject. but how high up is Air space and i would need permission?
[21:02] <keydash> seems it depends of your country laws
[21:02] <keydash> with a perfored pcb can I
[21:02] <keydash> *I can make the circuit of the tracker?
[21:02] <parabyte> i found the coolest lightest wifi device i want to raise it 100ft
[21:02] <SIbot1> In real units: 100 ft = 30 m
[21:02] <parabyte> ;)
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[21:04] <keydash> 100ft
[21:04] <SIbot1> In real units: 100 ft = 30 m
[21:04] <keydash> good
[21:06] <parabyte> yeah i only want 100ft
[21:06] <SIbot1> In real units: 100 ft = 30 m
[21:06] <keydash> sometimes
[21:06] <parabyte> as the oak tree's grow to around 40ft
[21:06] <SIbot1> In real units: 40 ft = 12 m
[21:06] <keydash> few meters above a poblation or that sites
[21:06] <fsphil> you're not doing this from a balloon are you?
[21:06] <keydash> it's a problem
[21:07] <keydash> here we cannot fly things over poblations under 1800 mts i think
[21:07] <parabyte> 1800m
[21:07] <parabyte> wowzer
[21:10] <SpeedEvil> parabyte: where are you?
[21:12] <parabyte> Uk
[21:13] <Lunar_Lander> 283 ft
[21:13] <SIbot1> In real units: 283 ft = 86 m
[21:13] <Geoff-G8DHE> What are you trying to achieve WiFi on a balloon won't float at 30m
[21:13] <Lunar_Lander> XD
[21:13] <Lunar_Lander> cool!
[21:13] <Lunar_Lander> 0.482 ft
[21:13] <SIbot1> In real units: 482 ft = 147 m
[21:13] <Lunar_Lander> 74042 ft
[21:13] <SIbot1> In real units: 74042 ft = 23 km
[21:13] <Lunar_Lander> 800 miles
[21:13] <Lunar_Lander> xD
[21:14] <fsphil> you've broke it
[21:14] <LeoBodnar> mile is a real unit
[21:14] <Lunar_Lander> oh
[21:15] <malgar> low altitude balloon
[21:15] <malgar> ground altitude balloon
[21:15] <LeoBodnar> no altitude balloon
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[21:15] <malgar> :D
[21:16] <parabyte> oh i got some el cheapo wifi soc and a small 10gram battery
[21:16] <parabyte> just an experiment
[21:16] <parabyte> the wifi hardware weighs in at 10 grams appox
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[21:16] <parabyte> and the antenna is copper wire that weighs in at a few grams at most i would estimate 10 grams again
[21:17] <LeoBodnar> how long would it work for?
[21:18] <parabyte> it consumes 0.5 of a watt @ 5 volts
[21:18] <parabyte> with losses n such about 6 hours
[21:18] <parabyte> unless there is a solar panel balloon
[21:18] <parabyte> that would be cool :P
[21:18] <SpeedEvil> http://www.youtube.com/watch?v=9Sgaq6OYLX8 I - has a picture of a HA balloon in it.
[21:19] <SpeedEvil> (but is about an interesting DNS - non-ECC-memory issue)
[21:20] <SpeedEvil> parabyte: what are you trying to do?
[21:20] <Geoff-G8DHE> 0.5 watt is a very low level for a WiFi unit ?
[21:21] <parabyte> oh yes
[21:21] <Geoff-G8DHE> and yet a 100mA from a 10g battery is a lot!
[21:21] <parabyte> 0.5 watts
[21:21] <parabyte> almost mind boggaling
[21:21] <parabyte> Geoff-G8DHE, super duper UBER amounts of energy saving
[21:21] <LeoBodnar> you'll probably lose it from 100 yards
[21:21] <parabyte> let me find url for device
[21:21] <parabyte> it runs popular openwrt linux
[21:21] <LeoBodnar> oh dear
[21:22] <SpeedEvil> Is it the carambola?
[21:22] <parabyte> almost
[21:22] <parabyte> yes
[21:22] <parabyte> same SOC
[21:22] <parabyte> http://wiki.openwrt.org/toh/tp-link/tl-wr703n
[21:22] <parabyte> i might use the carambola
[21:22] <parabyte> as its the same SOC
[21:23] <parabyte> i could just use the baloon line with really really thin power feed up it and have the battery on the ground
[21:23] <parabyte> ;)
[21:23] <parabyte> i want to keep it tethered to earth! :)
[21:23] <SpeedEvil> Tethered balloons are different from untethered ones - there are seperate rules for them.
[21:24] <parabyte> oh what :(
[21:24] <parabyte> so much red tape
[21:24] <SpeedEvil> http://www.caa.co.uk/applicationimages/pdficon_small.gif
[21:24] <SpeedEvil> doh
[21:25] <SpeedEvil> http://www.caa.co.uk/docs/33/CAP%20393%20final.pdf
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[21:26] <SpeedEvil> See page 135. You can't operate it within 60m of anything without permission of that things owner
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[21:28] <LeoBodnar> wtf?! http://squonk42.github.io/TL-WR703N/ tear apart somebody's product, stick your copyright on it and licence under Mickey Mouse licence laws?
[21:28] <LeoBodnar> am i missing something?
[21:29] <Laurenceb> but very useful
[21:29] <LeoBodnar> indeed but...
[21:29] <Laurenceb> i was looking at using that for wifi indoor positioning
[21:29] <parabyte> LeoBodnar, :O
[21:29] <parabyte> wowzer
[21:29] <Laurenceb> unfortunately i never had time to do it
[21:29] <parabyte> Laurenceb, is the SOC available to the public to buy?!
[21:30] <Laurenceb> i think so, yeah
[21:30] <parabyte> i guess there is a chinese clone of the soc
[21:30] <Laurenceb> a little tricky to obtain
[21:30] <Laurenceb> but ive seen it
[21:30] <SpeedEvil> Wait.
[21:30] <parabyte> wowzer i better get printing pcb's
[21:30] <parabyte> LOL
[21:30] <SpeedEvil> Most of the rules for tethered balloons do not apply if it's under 2m.
[21:30] Action: SpeedEvil keeps on forgetting about the 'small balloon' exemption
[21:33] <parabyte> 2m :O
[21:33] <parabyte> lol
[21:33] <parabyte> :(
[21:34] <Laurenceb> this reminds me - i need to re read the datasheet for that SOC
[21:34] <parabyte> LeoBodnar, got any more reverse engineered stuff?
[21:34] <Laurenceb> and work out how wifi ranging could be implimented
[21:35] <LeoBodnar> this is not my page parabyte
[21:35] <parabyte> ;)
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[21:38] <mikestir> LeoBodnar: hardware has no copyright protection - it would have to be a patented design
[21:38] <mikestir> assuming that board layout is a re-do
[21:38] <Babs_> Hey Leobodnar - last question of the weekend....negative longitude, how is that worked through the ubx protocol when all of the numbers appear to be positive?
[21:38] <mikestir> as the artwork could be argued to be copyright (as it's a design in its own right)
[21:39] <SpeedEvil> Ok - this gets more complex.
[21:39] <SpeedEvil> An uncontrolled, or a controlled balloon is not a small balloon.
[21:40] <SpeedEvil> A small balloon therefore does not fall within 163.2 as a balloon in captive or tethered flight is an uncontrolled or controlled balloon - which cannot be a small balloon
[21:42] <SpeedEvil> As far as I understand the published regulations - there are no rules whatsoever that apply to a small balloon on a string to the ground.
[21:44] <amell> other than do not hold string if there is a lightning storm?
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[21:46] <LeoBodnar> Babs_: they can be negative if the most significant bit is 1
[21:46] <LeoBodnar> s/can/are/
[21:46] <Geoff-G8DHE> We need contenders for the Darwin Awards so don't doscourage anybody !
[21:46] <Geoff-G8DHE> *discourage
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[21:48] <SpeedEvil> Well.
[21:48] <SpeedEvil> I have previously posted my other interpretation of the act which is much better in that regard.
[21:49] <SpeedEvil> I think it's quite legal to tie strings to several model aircraft, put on roller-blades, and drag yourself around the sky on a parafoil.
[21:49] <SpeedEvil> - requiring no licence and having to obey almost no rules.
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[21:50] <myself> I love you guys.
[21:50] <myself> If ever there was a concept that begged for a comic illustration, that is it.
[21:51] <crash_18974> that sounds like fun
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[21:52] <LeoBodnar> isn't this what true freedom is?
[21:53] <crash_18974> true freedom would be doing it naked :P
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[21:55] <amell> what would one use for first balloon board?
[21:55] <amell> super lite pico.
[21:58] <amell> http://ava.upuaut.net/wp-content/uploads/2013/01/IMG_1060.jpg - this board, is it home made?
[21:59] <mfa298> amell: I think all the lightweight pico trackers are custom made by the person flying it.
[22:00] <amell> ok. shame theres no boards about. I don't have patience for designing the boards.
[22:01] <mfa298> if you want a lightweight tracker then the only real option is design it yourself.
[22:01] <mfa298> you can start off with slightly less lightweight using something like arduino/ ntx2b/ ublox breakout.
[22:02] <Upu> I've seen that board before
[22:02] <Upu> thats the old one amell try this one : http://imgur.com/a/j4wE6
[22:02] <Upu> sadly mfa298 is correct
[22:03] <Upu> if you want a super light weight board you have to put the effort in and design it yourself
[22:03] <amell> thats lovely board, but i don't have smt oven etc.
[22:03] <Upu> the previous one you linked you don't need one
[22:03] <Upu> the one I just linked you probably do, though you could do it with a toaster oven and controller
[22:03] <Upu> http://imgur.com/a/bQXrk
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[22:17] <LeoBodnar> amell: talk to Lunar_LanderA
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[22:18] <Lunar_LanderA> ?
[22:19] <amell> Lunar_LanderA: we're talking about pico boards. anybody doing a batch run of these?
[22:19] <Lunar_LanderA> hm I doubt my board is really Pico
[22:19] <Lunar_LanderA> wait
[22:20] <Lunar_LanderA> http://gerblook.org/pcb/ZBS3A9oT45aJDcQNfnRvdn
[22:21] <Lunar_LanderA> btw, seems to be a great documentary on the NASA ULDB http://vimeo.com/58791972
[22:22] <amell> http://ava.upuaut.net/?p=650 - a board like this, mass produced...
[22:24] <Lunar_LanderA> ah
[22:25] <mfa298> people generally want to keep their designs / bugs to themselves - most trackers also have slightly different goals (lightest/ lowest power/ solar/ new modes) which can't all be done with a standard board.
[22:25] <mfa298> the circuitary for most of them isn't that difficult. microcontroller, gps, radio and possibly a couple of sensors.
[22:26] <SpeedEvil> phased plasma rifles.
[22:26] <Upu> amell sorry I won't sell that board
[22:27] <Upu> you need to design something yourself but really they aren't that complex
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[22:27] <aadamson> LeoBodnar, in your travels, have you looked at this? I wonder if it might make the LPF interface for the 4463 simpler?
[22:27] <aadamson> http://www.minicircuits.com/pdfs/LFCN-490.pdf
[22:27] <amell> yes. its a nice board :)
[22:28] <Upu> tbh I don't think I could mass produce them
[22:28] <Upu> thats interesting aadamson
[22:28] <aadamson> Upu, sure you could - http://www.goldphoenixpcb.com/
[22:29] <amell> i recall making a board at uni some 20 odd years ago. it was so tiny, about 1cm square and all the components were tight packed.
[22:29] <aadamson> I've done a number of boards with this place, they purchase the parts from digikey and the rest is all turnkey
[22:29] <aadamson> prices are very good too btw
[22:29] <Upu> well
[22:30] <aadamson> but each has their own interests.... :)
[22:30] <Upu> it wasn't meant for mas sproduction
[22:30] <Upu> it was meant for me to mess about with
[22:30] <aadamson> yeah that filter is used in a bunch of other stuff and I'm curious if Leo had taken a look at that?
[22:30] <amell> aadamson: interesting site.
[22:30] <aadamson> yeah, I know... just poking yah
[22:31] <aadamson> minicircuits, oh they do lots of stuff in and around RF
[22:31] <Upu> the amp in the habamp is a minicircuits one
[22:31] <aadamson> yeah, pretty typica.
[22:31] <aadamson> l
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[22:32] <aadamson> you'd need a matching circuit (LC) to get you to 50 ohms, and if needed coupling caps, but those aren't absolutely necessary
[22:32] <aadamson> I just wonder
[22:32] <aadamson> A single chip sure would help with board space/component count, etc
[22:32] <aadamson> ok, gotta go walk the dogs...
[22:44] <Laurenceb> 47,430.00 m
[22:44] <Laurenceb> 155,610.20 ft Educational Amateur Satellites 2014-02-20
[22:44] <SIbot1> In real units: 20 ft = 6.10 m
[22:44] <Laurenceb> what the heck
[22:44] <Laurenceb> who are these guys
[22:45] <LeoBodnar> thanks aadamson interesting find
[22:45] <LeoBodnar> i redid LPF myself as GP antenna in free space wasn't 50R
[22:46] <LeoBodnar> and since then I started using 2m dipole altogether
[22:46] <LeoBodnar> need to redo the tracker really, but it works as it is
[22:46] <LeoBodnar> are they Japanes Laurenceb ?
[22:46] <aadamson> ah, so when you do aprs, you do it in 2mtrs don't ya... I keep forgetting that
[22:47] <Laurenceb> dont know
[22:47] <aadamson> power consumption probably goes way down too in that mode
[22:47] <aadamson> Hey are using that filter on openLRS (long range system) for RC control, it's pretty much the norm there now
[22:48] <aadamson> that uses 2 or 4fsk for pwm uplink and telemetry down
[22:48] <aadamson> hey = they
[22:48] <LeoBodnar> oh dear ITLAC 01
[22:48] <LeoBodnar> http://vimeo.com/87576347
[22:48] <Laurenceb> oh italian
[22:48] <Laurenceb> lol the graphics
[22:51] <LeoBodnar> Spanish i think
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[22:59] <LeoBodnar> 47.43km on Helium?
[22:59] <Laurenceb> oh
[22:59] <Laurenceb> maxico
[22:59] <Laurenceb> erm
[22:59] <Laurenceb> Mexico lol
[22:59] <Laurenceb> freudian slip
[23:00] <Laurenceb> http://web.itlac.mx/
[23:01] <LeoBodnar> 4kg payload wtf?
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[23:04] <LeoBodnar> is this their first launch?
[23:05] <LeoBodnar> and straight up 10% higher than the closest other
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[23:05] <LeoBodnar> and a lot of pre-flight publicity
[23:06] <LeoBodnar> i smell something fishy
[23:07] <Laurenceb> me too
[23:08] <Lunar_LanderA> hm
[23:09] <Upu> thats bollocks
[23:10] <Upu> latex balloon 4kg payload Helium
[23:11] <Upu> it is a rather large latex though
[23:13] <Lunar_LanderA> yea
[23:17] <LeoBodnar> altitude *= 1.1;
[23:17] <Upu> and then some
[23:18] <Upu> suprised Keith Kaisers just accepted that record I'd be wanting a little more information
[23:18] <Upu> like make and model of balloon pls
[23:19] <Upu> I sit with skeptism until someone gives me more info
[23:19] <SpeedEvil> Or ft/m confusion :)
[23:19] <Upu> yeah lol
[23:19] <Upu> 47k feet
[23:19] <Upu> more like it
[23:20] <craag> for a 4kg payload yeah
[23:20] <Upu> the balloon is pretty full too
[23:20] <craag> That balloon isn't that much bigger than a 3000g?
[23:20] <Upu> I'm calling bullshit
[23:20] <LeoBodnar> the more i think about it the more staged it all seems
[23:21] <Upu> I heard there is a 4kg latex somewhere but don't know if it exists
[23:21] <Upu> 3kg hwoyee
[23:21] <Upu> £290 on Steve's site
[23:21] <Upu> I'll pass that by Steve see what he says
[23:21] <Lunar_LanderA> I read in a japanese paper that 4.5 kg Latex was used to lift a 17 kg cryosampler at the japanese antarctic base
[23:21] <Lunar_LanderA> seems like that was a custom build
[23:21] <Upu> anyway
[23:22] <Lunar_LanderA> yea
[23:22] <Upu> night all
[23:22] <LeoBodnar> nn
[23:22] <Lunar_LanderA> night anthony
[23:22] <daveake> nn
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[00:00] --- Mon Mar 10 2014