highaltitude.log.20130127

[00:00] <OZ1SKY_Brian> oh maybe just
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[00:13] <fsphil> I'm not gonna get this compiled in time
[00:15] <fsphil> ah nuts, forgot there's a filter on the fcd for just the 70cm band
[00:16] <fsphil> it can't hear much outside 430-440 mhz
[00:17] <SpeedEvil> http://www.youtube.com/watch?feature=player_detailpage&v=QKSvu3mj-14#t=433s
[00:17] <SpeedEvil> on pigeons and relays and lights
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[00:28] <fsphil> anything OZ1SKY_Brian?
[00:32] <OZ1SKY_Brian> hearing it but nothing decoded
[00:33] <fsphil> it's probably going to be coming down soon
[00:34] <fsphil> radio's in FM mode yea?
[00:34] <OZ1SKY_Brian> yes
[00:37] <OZ1SKY_Brian> sounds like burst
[00:46] <Lunar_Lander> oh
[00:49] <OZ1SKY_Brian> might need a discriminator output for it to work
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[00:55] <Lunar_Lander> brian do you often track sondes?
[00:56] <OZ1SKY_Brian> first time
[00:59] <Lunar_Lander> ah
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[03:57] <Spoz> tornadoes around here today :/
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[08:04] <costyn> hello all
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[08:05] <costyn> so what would be the best way to connect a N-connector colinear to a SMA connector dvb-t stick?
[08:06] <Upu> http://www.ebay.co.uk/sch/i.html?_trksid=p5197.m570.l1313&_nkw=n-type+to+sma&_sacat=0&_from=R40
[08:06] <Upu> morning
[08:06] <costyn> well nevermind, I just found SMA connector for aircell-7
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[08:06] <costyn> Upu: ah yes, that would be good too
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[08:13] <costyn> gave a talk about HAB and listening to HABs to about 75 people at a hackerspace party yesterday. was kinda fun
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[08:27] <x-f> nice, now expecting new recruits?
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[09:19] <SP9UOB_Tom> hi all
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[09:21] <mattltm> Hi Tom
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[11:18] <chrisstubbs> Hi guys, I am trying to build dlfldigi for the raspberry pi, but i keep getting this error: http://pastebin.com/6FYW1KRR :(
[11:22] <chrisstubbs> What exactly do i need to add to the file?
[11:23] <mclane> raspberry pi linux sources.list
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[11:24] <mclane> can you post the content of that file?
[11:24] <chrisstubbs> yeah i will open it up now...
[11:26] <chrisstubbs> pastebin.com/JusqnNmC
[11:30] <mclane> have a look there: http://www.raspbian.org/RaspbianRepository
[11:30] <chrisstubbs> deb-src looks promising, i will try and add that
[11:30] <chrisstubbs> cheers :)
[11:31] <mfa298> looking at my sources file it looks like you just copy the first line and change deb to deb-src
[11:31] <mclane> you need a line starting with deb-src to get the source files which may be needed
[11:32] <fsphil> I've built it before chrisstubbs, it didn't run fast enough for real-time decoding
[11:33] <mclane> any news from sputnik-2?
[11:33] <fsphil> but I think most of the cpu time ended up in the UI or the x libraries
[11:33] <mfa298> fsphil: that was what I thought when I tried running it, as well as the pain of which usb sound cards work
[11:33] <SP9UOB_Tom> mclane: still in my room :-)
[11:33] <fsphil> so it should be possible to fix it
[11:33] <SP9UOB_Tom> mclane: Polish Hams are gathering on the map now ;-)
[11:33] <fsphil> ooh launch today?
[11:33] <fsphil> I forgot about that
[11:34] <mclane> I saw that!
[11:34] <SP9UOB_Tom> yeah, @14:00 utc
[11:34] <SP9UOB_Tom> 437.600
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[11:43] <chrisstubbs> seems to be working now, cheers mclane
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[12:03] <jarod> Darkside here?
[12:04] <jarod> when you make a groundplane antenna is vertical
[12:04] <jarod> was it possible to make an all direction horizontal antenna as well?
[12:10] <Darkside> nowhere near as easily
[12:11] <Darkside> there are some odd cloverleaf antennas that will do that
[12:11] <Darkside> but i'm not sure how to make them
[12:11] <jarod> i see
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[12:28] <mfa298> I think the Halo antennas are supposed to be fairly omni directional with a horizontal polarisation
[12:29] <Darkside> making one at a higher frequency will be interesating
[12:29] <Darkside> like ADS-B
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[12:30] <Darkside> getting the tuning right on one of those looks fun
[12:30] <mfa298> yup, 2m seems to be possible, although tuning them looks to be interesting
[12:30] <Darkside> you would need a VNA
[12:32] <jarod> i need for this: http://x264.nl/dump/35cm-band-wireless-audio-using-adsb-antenna.jpg
[12:32] <jarod> vertical works great for that
[12:32] <jarod> but the amateurs are Horizontal there :)
[12:33] <mfa298> crossed dipoles might get you part way there.
[12:34] <mfa298> it's probably not totally omni but would be better than a single dipole
[12:35] <jarod> ah
[12:35] <jarod> http://x264.nl/dump/rtlsdr-mini-virtual-radar-server-distance-adsb-1.0.11.1-record.jpg is my new record
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[12:35] <jarod> using http://x264.nl/dump/ads-b-antenna-groundplane-proper.jpg :P
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[13:14] <SP9UOB_Tom> ok, CAA permission confirmed, im going to the launch site
[13:15] <Hix> is there a flight today?
[13:17] <Upu> Poland
[13:18] <Hix> ahh SPUTNIK-2
[13:18] <Hix> CAA made me think it was a UK flight
[13:20] <Hix> anyone interested in siemens MC55 GSM/GPRS modules, I've got an excess of them http://www.mobilesolutions.ch/index.php?id=114&L=1 £15 plus post
[13:21] <Upu> do you want those two you sent me back ?
[13:21] <Upu> probably not going to use them
[13:22] <Hix> up to you
[13:28] <Upu> I bought a header and a sim socket
[13:28] <Upu> but when I looked into it was easier just to use the one from Sparkfun
[13:28] <Hix> got a schematic for the breakout if you want
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[13:29] <Upu> yeah I got it
[13:29] <Hix> ok
[13:29] <Upu> but thx
[13:29] <Hix> np
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[13:30] <Hix> need to order a breakout and some new 1252s as I've got working code and no GPS - sods law
[13:30] <MrCraig> Afternoon all
[13:31] <Hix> tried to forward data from bluetooth gps to arduino but no success
[13:32] <Upu> hi MrCraig
[13:32] <MrCraig> Hey Upu :-)
[13:33] <MrCraig> I am more or less set for a Feb 9th Launch out of cambridge. I'd like to use the space-near tracker. Is there someone here that can set up an dl-fldigi autoconfig for the flight?
[13:34] <MrCraig> Oh and does anyone have a chdk interval script?
[13:36] <number10> you'll need to generate documents MrCraig http://habitat.habhub.org/genpayload/
[13:37] <MrCraig> Thanks - I figure I can do that.
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[14:03] <jonsowman> do be quiet zeusbot
[14:04] <lz1dev> ??who
[14:04] <lz1dev> he doesnt like me :(
[14:04] <jonsowman> he's a grumpy sod
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[14:07] <MrCraig> restart brb
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[14:07] <Hix> can you change the thickness of an entire net in eagle easily?
[14:07] <lz1dev> SP9UOB is on the map :D
[14:08] <Hix> or rather wires
[14:09] <jonsowman> Hix: cmd-change-brd-width.ulp
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[14:10] <Hix> nice jonsowman
[14:11] <jonsowman> :)
[14:11] <MrCraig> hey Jon - didn't see u there
[14:11] <jonsowman> hello MrCraig
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[14:13] <MrCraig> Arguing with an SD card - I think it's outsmarted me.
[14:13] <S_Mark> Arduino?
[14:13] <MrCraig> setting up chdk
[14:14] <S_Mark> ah
[14:14] <MrCraig> wicks setup 2 partitions, but for some reason my old xp box won't mount the second
[14:15] <mclane> sputnik 2 up
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[14:24] <x-f> so many trackers!
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[14:27] <GMT> Sputnik is rising very slowly, I wonder if it's a 'floater'?
[14:27] <Upu> its a 100g
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[14:31] <GMT> ah, okay
[14:38] <Hix> anyone willing to go over my board design? not really 100% with the DRC and ERCs, think they're ok
[14:38] <jonsowman> does it pass DRC? and are you using the right DRC config for your fab house?
[14:39] <SP9UOB_Tom> ok im back :-)
[14:39] <Hix> I'm using eC-PCB_proto-2-layer as advised on #hackvana
[14:40] <jonsowman> OK
[14:40] <jonsowman> and does it pass without warnings/errors?
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[14:40] <jonsowman> I assume you're having the PCBs made by hackvana?
[14:40] <Hix> there are lods of stopmask errors, but not sure if that is a valid fail
[14:40] <Hix> and yes Mitch doing it
[14:40] <jonsowman> okay
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[14:40] <jonsowman> what are the errors?
[14:40] <Hix> also overlaps on vias
[14:41] <jonsowman> just check they're not real errors, such as having two vias on top of each other
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[14:43] <Hix> ok
[14:47] <OM1ATS> Yes ! first packet decoded
[14:48] <fsphil> nice
[14:48] <fsphil> that's a pretty slow ascent
[14:48] <SP9UOB_Tom> i was aiming to 1 m/s
[14:49] <jonsowman> so many trackers
[14:49] <fsphil> there's as many trackers there now as a good UK launch
[14:49] <jonsowman> yeah
[14:49] <fsphil> great to see!
[14:50] <fsphil> anyone listening out? might be some sporadic-e :)
[14:50] <SP9UOB_Tom> Polish hams are awesome :-)
[14:50] <jonsowman> also numerous
[14:51] <fsphil> we can totally do APEX again
[14:51] <fsphil> or Storm, but with insulation
[14:51] <Hix> right I'm down to 100 errors :) 3 dimensions for the sarantel on the edge of the board and 97 stopmask errors is that classed as a pass then?
[14:51] <jonsowman> if this goes as far as Apex it'll probably reach the Med
[14:51] <fsphil> indeed
[14:52] <jonsowman> Hix: what do you mean by stopmask?
[14:52] <jonsowman> screenshot perhaps
[14:52] <Hix> sec
[14:52] <fsphil> the predicted burst altitude is perhaps optimistic?
[14:52] <fsphil> unless it's a really heavy payload
[14:52] <jonsowman> I can change it..
[14:53] <jonsowman> 20k?
[14:53] <fsphil> SP9UOB_Tom?
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[14:53] <Hix> comme ca http://i.imgur.com/84WpTZt.png
[14:54] <jonsowman> interesting
[14:54] <jonsowman> is that only on soem parts?
[14:54] <jonsowman> can't type with plaster on one finger :(
[14:54] <OM1ATS> Tomek congratulation, nice signal !
[14:55] <SP9UOB_Tom> OM1ATS: thanks - 8 dBm out from RFM22b
[14:55] <fsphil> I told you not to feed those piranhas jonsowman
[14:55] <jonsowman> should've listened
[14:55] <fsphil> tsh
[14:56] <Hix> jonsowman, resistors 0805, ATMega and caps 0805 mostly, couple of vias and the NTX2 as illustrated
[14:56] <jonsowman> Hix: can you send the .brd over?
[14:56] <Hix> PM
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[14:57] #highaltitude: mode change '+o jonsowman' by ChanServ!ChanServ@services.
[14:58] Topic changed on #highaltitude by jonsowman!jonsowman@kryten.hexoc.com: Welcome to #highaltitude - discuss anything to do with high altitude projects (balloons, gliders, etc) www.ukhas.org.uk - SPUTNIK 2 27/01/2013 14:00 UTCR Poland
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[14:58] <fsphil> UTCR?
[14:58] <SP9UOB_Tom> fsphil: ask UPU ;-)
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[14:59] <OM1ATS> only 8dBm ? 8dBm is 6.3mW
[15:00] <SP9UOB_Tom> OM1ATS: i changed today from 50mW
[15:01] <OM1ATS> aha ok, and without pause 90s ?
[15:02] <SP9UOB_Tom> OM1ATS: transmitter is always on
[15:02] <jonsowman> Hix: yeah that's all fine
[15:03] <OM1ATS> Yes, you hear continual signal
[15:03] <jonsowman> some of the parts have t/bstop in weird places but it's not a problem
[15:05] <Hix> ok cool thanks
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[15:09] <SP9UOB_Tom> Wow ! so many trackers :-)
[15:10] <fsphil> 11 on that one
[15:10] <fsphil> that can't be far from a record
[15:10] <fsphil> at this rate you'll need nosebleedkt to track it
[15:11] <SP9UOB_Tom> i has 28 on 28 MHz
[15:11] <fsphil> you're transmitting on 28mhz too?
[15:11] <SP9UOB_Tom> fsphil: no this time
[15:11] <fsphil> ah
[15:11] <SP9UOB_Tom> i had
[15:11] <fsphil> was ready to retune :)
[15:11] <fsphil> actually must see if I can hear anything on 10m at all
[15:12] <fsphil> I've made a simple loop in the attic
[15:13] <fsphil> nothing
[15:13] Action: Hix rubs hands at prospect of board ready to be made
[15:13] <fsphil> got rtty on 21mhz
[15:14] <Hix> https://www.dropbox.com/s/xfvv11d50c966uf/Hix_Hab_Tracker_Rev2_PCB.pdf
[15:14] <fsphil> HixHab
[15:14] <fsphil> love it
[15:15] <Hix> ::D
[15:16] <Hix> the thing thats really annoying me is that I've got my code working but broken the sarantel so cant test it in the car. grrrr
[15:16] <Hix> I'm still trying to get bluetooth gps to spit data out to another com port
[15:16] <SP9UOB_Tom> Hix: just do 1/4 lambda GP
[15:17] <Hix> ?
[15:17] <SP9UOB_Tom> Hix: its *REALLY* working
[15:18] <SP9UOB_Tom> cut piece of wire and solder it
[15:18] Action: Hix is lost here
[15:18] <SP9UOB_Tom> to the board
[15:18] <fsphil> 1/4 antenna for the gps receiver
[15:18] <jonsowman> SP9UOB_Tom: His is in need of a GPS antenna
[15:18] <Hix> ahh gotcha
[15:18] <jonsowman> *Hix
[15:18] <SP9UOB_Tom> jonsowman: i know
[15:18] <Hix> the track is gone from the pcb
[15:19] <jonsowman> can't say I've ever tried using a 1/4 wave for a GPS
[15:19] <jonsowman> what happened to the sarantel Hix?
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[15:19] <SP9UOB_Tom> jonsowman: i do it very often
[15:19] <SP9UOB_Tom> and it works !
[15:19] <Hix> it went into "flight mode"
[15:19] <jonsowman> fair enough :)
[15:19] <Hix> second time- last time
[15:20] <fsphil> lol
[15:20] <Hix> what length is 1/4 wave for GPS? 1575.42, MHz.
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[15:21] <Hix> i could solder [sorry sodder] it to the ublox
[15:21] <SP9UOB_Tom> 47.6 mm
[15:22] <SP9UOB_Tom> also add velocity factor so - about 47mm wire
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[15:22] <SP9UOB_Tom> silver coated wire is ok
[15:23] <Hix> just a length of single core 0.6mm^2 ok?
[15:23] <SP9UOB_Tom> Hix: yea
[15:23] <Hix> cool - off i go...
[15:25] <MrCraig> ok - I just used the document generator to generate a document. Should I be able to download it, or is that inserted into the tracker now?
[15:25] <fsphil> it's stored in habitat
[15:26] <fsphil> it should have given you the long ID code
[15:26] <MrCraig> this is all shiney new stuff to me :-)
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[15:34] <MrCraig> I don't actually have a launch time agreed with CUSF for feb 9th? Is anyone in from Cambridge that can give me a window?
[15:36] <jonsowman> hi MrCraig
[15:36] <MrCraig> hi Jon
[15:36] <jonsowman> we can do whenever you like on saturday within reason really
[15:36] <jonsowman> we should wait till weds/thurs this week to see what the predictor is saying
[15:37] <MrCraig> Should I wait before generating the flight doc in habitat? Or generate the doc and adjust the time if necessary later? I was going to just put noon in and work from there.
[15:38] <jonsowman> you might as well wait really
[15:38] <jonsowman> it can be approved quickly when required
[15:39] <MrCraig> I actually leave the country again on Sunday 10th so the 9th is my last window to launch. I could bring it back to the 2nd if that's agreeable and would increase chances of flying.
[15:39] <MrCraig> I only have gas to source (I have to go fetch it from the midlands)
[15:40] <jonsowman> I'm going to be busy on the 2nd but there's a chance someone else will be available
[15:41] <MrCraig> Also - a lost payload would not be desirable, but not the end of the world. This is the buggy mark-1 from April 2010 :-)
[15:41] <jonsowman> what balloon and payload mass are we talking?
[15:41] #highaltitude: mode change '-o jonsowman' by ChanServ!ChanServ@services.
[15:42] <MrCraig> <250g payload (around 180g), 1000g balloon.
[15:42] <jonsowman> okay cool
[15:42] <jonsowman> well if we try for a launch about 10-11 then that's plenty of time to chase/recover
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[15:45] <MrCraig> ok cool - Do you think there is high risk of a cancelled flight this time of year? I'd rather not alter the launch date for convenience, but if risk is high I should consider making two weekends available.
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[15:51] <MrCraig> quite excited really.
[15:51] <OM1ATS> Tomek, GPS is out ?
[15:52] <jonsowman> MrCraig: http://hourly.cusf.co.uk/
[15:52] <SP9UOB_Tom> OM1ATS: burst propably
[15:52] <jonsowman> it's not looking great at the moment, unless a europe recovery sounds fun
[15:52] <jonsowman> which it does
[15:53] <SP9UOB_Tom> OM1ATS: keep listening :-)
[15:53] <OM1ATS> burst no, signal is stable
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[15:53] <MrCraig> eeech
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[15:54] <OM1ATS> yes after the last packet :)
[15:54] <SP9UOB_Tom> maybe GPS is frozen
[15:55] <lz1dev> SP9UOB_Tom: whats the predicted burst altitude?
[15:55] <MrCraig> jonsowman: my only real concern is having to be at heathrow T3 at 7:30am on the 10th. Getting stuck somewhere in France / Belgium could be problematic.
[15:55] <jonsowman> MrCraig: haha yes
[15:55] <jonsowman> well unless you want to pay CUSF to chase it for you
[15:55] <jonsowman> :D
[15:56] <jonsowman> been looking for an excuse to launch a floater and chase it through europe
[15:56] <NigeyS> 5 donuts ?
[15:56] <jonsowman> and by "excuse", I mean "funding"
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[15:56] <SP9UOB_Tom> lz1dev: i have no idea - its 10 years old balloon
[15:56] <Lunar_Lander> hellohello
[15:56] <Lunar_Lander> hi SP9UOB_Tom
[15:56] <Upu> I put 15km in
[15:56] <Lunar_Lander> I am from germany, yes
[15:56] <Upu> as a guess
[15:56] <Lunar_Lander> I missed your question yesterday
[15:56] <lz1dev> im just wondering whenever there is a micro chance
[15:56] <Upu> for live prediciton
[15:56] <lz1dev> of hearing dow here
[15:56] <lz1dev> down*
[15:57] <MrCraig> yeah, the budgetary issue doesn't sound like the most pleasent prospect right now - I am an independant without funding afterall :)
[15:57] <SQ5NWI> Signal weak but stable here near to Warsaw, so no burst, but problem with GPS for sure :-(
[15:57] <Upu> -51'C
[15:57] <lz1dev> it was -58 at a point
[15:57] <jonsowman> MrCraig: haha yes it's a tad hard to justify
[15:57] <jonsowman> :D
[15:57] <jonsowman> that would get through a fair amount of diese;
[15:57] <jonsowman> *l
[15:58] <MrCraig> Were did you enter the prediction data? Could I go run it for the 2nd also?
[15:59] <jonsowman> MrCraig: it runs on cron every 6 hours
[15:59] <jonsowman> that's the locus of landing points
[15:59] <jonsowman> hover over each point to see info
[15:59] <MrCraig> Ahh I see
[16:00] <jonsowman> you can do single predictions at http://habhub.org/predict
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[16:02] <jcoxon> wow its travelling far
[16:03] <MrCraig> ok- that prediction covers until Feb 3rd. It looks like "silly o'clock" on Feb 2nd is best chance of a UK landing. I'd guestimate that waiting out til Feb 9th (or at least until there are predictions for that date) as planned is the better option.
[16:03] <jonsowman> yeah probably
[16:03] <jonsowman> I mean, we could launch at silly oclock
[16:04] <jonsowman> it wouldn't be the first nor last time
[16:04] <jonsowman> but chasing payloads and finding them in the dark is difficult
[16:05] <MrCraig> yes, and a Cannon A560 probably doesn't have a big enough flash to light up the planet for nice ground shots.
[16:05] <jonsowman> unlikely
[16:06] <jiffe1> just needs a bigger battery
[16:06] <jonsowman> one of the ones from the Dreamliners should do it
[16:06] <jcoxon> wow sp9uob is going for it
[16:09] <jcoxon> oh
[16:09] <jcoxon> has it stopped?
[16:09] <jonsowman> temporaril.
[16:09] <jonsowman> +y
[16:09] <jonsowman> we hope
[16:09] <SP9UOB_Tom> jcoxon: gps stopped working
[16:10] <jcoxon> ublox?
[16:10] <SP9UOB_Tom> its reporting the right time but no fix (and excessive current draw)
[16:10] <SP9UOB_Tom> no GlobalTop
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[16:12] Nick change: mm_ -> mm1
[16:12] <jcoxon> oh right mediatek based then
[16:12] <jiffe1> are there any landing predictors based on historical atmospheric information rather than predicted atmospheric information?
[16:13] <jiffe1> such as if I lost signal and I wanted a better idea of where to look
[16:13] <jonsowman> the NOAA models are available for some amount of time after the time has passed
[16:14] <jonsowman> there's nothing stopped you keeping an archive yourself
[16:14] <jonsowman> the predictor can be given any model
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[16:15] <mattbrejza> so there is this global tuner, but i cant turn off squelch :( http://www.globaltuners.com/receiver/classic.php?receiver=519
[16:15] <mattbrejza> or tune it....
[16:15] <mattbrejza> o well
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[16:17] <craag> I think that's a repeater stream?
[16:17] <mattbrejza> yea
[16:17] <mattbrejza> but it was getting me hopeful when the freq changed
[16:18] <mattbrejza> and someone is on the vienna one
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[16:23] <OZ1SKY_Brian> hi
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[16:30] <SP9UOB_Tom> signal is strong and stable, but the F**** GPS
[16:30] <fsphil> :(
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[16:33] <daveake> Hopefull it'll get a lock when it warms up a bit
[16:33] <lz1dev> when?
[16:33] <lz1dev> its night
[16:34] <SP9UOB_Tom> sunset not heling
[16:34] <SP9UOB_Tom> helping
[16:34] <daveake> yeah that won't help :(
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[16:34] <SP9UOB_Tom> anyway gps draws excessive power
[16:34] <daveake> How do you know? Battery voltage dropped?
[16:34] <jcoxon> SP9UOB_Tom, excessive draw suggests its actively searching for a lock
[16:34] <SP9UOB_Tom> yes
[16:35] <SP9UOB_Tom> jcoxon: for about 40 minutes :-(
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[16:35] <SP9UOB_Tom> -54 deg C
[16:36] <jcoxon> SP9UOB_Tom, well there are two potential outcomes
[16:36] <jcoxon> either it starts working or doesn't
[16:36] <SP9UOB_Tom> LOL :-)
[16:36] <jcoxon> i think it'll start again
[16:36] <jcoxon> :-p
[16:36] <SP9UOB_Tom> or battery die
[16:36] <SP9UOB_Tom> 1.07V
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[16:38] <SP9UOB_Tom> it should be leaving Slovakia now
[16:39] <OM1ATS> Yes Tomek, stable signal, temp -54 and U bat 1.05V
[16:40] <SP9UOB_Tom> im sute its over 15 km now
[16:40] <SP9UOB_Tom> sure
[16:41] <Lunar_Lander> what was the voltage at liftoff?
[16:41] <Lunar_Lander> is it one of those low voltage systems?
[16:42] <SP9UOB_Tom> Lunar_Lander: 1.5V reom brand new, shiny Energizer Lithium
[16:42] <Lunar_Lander> yes
[16:42] <SP9UOB_Tom> from
[16:42] <Lunar_Lander> and what's the CPU voltage?
[16:42] <SP9UOB_Tom> 3.0V
[16:42] <SP9UOB_Tom> and GPS too
[16:42] <Hix> SP9UOB_Tom, guess what....
[16:43] <SP9UOB_Tom> Hix: ?
[16:43] <fsphil> that's quite a drop
[16:43] <Hix> 47mm of wire works better than the sarantel did :D
[16:43] <Hix> $$HixHAB,1,16:41:07,51.6830,+0.0279,9999999,255*AAAA
[16:43] <SP9UOB_Tom> Hix: You own me a pizza :-)
[16:43] <Hix> nearly there
[16:43] <fsphil> lol
[16:43] <Hix> or owe :D
[16:44] <SP9UOB_Tom> owe
[16:44] <SP9UOB_Tom> sorry for my english
[16:44] <Hix> no probs, it just read funny.
[16:44] <Upu> you must have a broken Sarantel
[16:44] <Hix> i have now anyhow :)
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[16:46] Action: SP9UOB_Tom really need big laser gun to warm-up the GPS
[16:46] <daveake> Borrow Upu's torch
[16:46] <Hix> bingo!!! $$HixHAB,26,16:46:17,51.6830,+0.0280,49,7*C076
[16:47] <Hix> alt and noOfSats now there too.
[16:47] <SP9UOB_Tom> Hix: where are You from ?
[16:47] <Hix> UK
[16:47] <SP9UOB_Tom> moer precise ?
[16:47] <SP9UOB_Tom> more
[16:48] <Hix> London [ish]
[16:48] <Hix> just right of the meridian, which will help with testing
[16:48] <SP9UOB_Tom> Hix: ok, i'll remember that pizza when i'll be in London ;-)
[16:48] <mattbrejza> theres no need for asking where someone is thanks to spacenear
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[16:49] <Hix> 51.6830,+0.0280
[16:49] <Hix> to be precise
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[16:50] <Guest33263> when can we contact spunik 2 from norway ?
[16:52] <SP9UOB_Tom> it should be over Hungary right now
[16:52] <Hix> SP9UOB_Tom, you're welcome to a pizza if you bring some Kabanos
[16:53] <Hix> om nom nom
[16:53] <SP9UOB_Tom> Hix: :-))) no problem
[16:53] <Lunar_Lander> SP9UOB_Tom, wait
[16:53] <Lunar_Lander> how do you power a 3V system from one AA cell?
[16:53] <Lunar_Lander> stepup?
[16:54] <SP9UOB_Tom> im planning to visit UK (mostly London, but also Woodhenge, Stonehenge and Sherwood) in summer
[16:54] <SP9UOB_Tom> Lunar_Lander: CMP1640
[16:54] <SP9UOB_Tom> MCP1640
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[16:54] <Lunar_Lander> ah
[16:54] <SP9UOB_Tom> from microchip
[16:54] <mattbrejza> tps61200 ftw :P
[16:55] <SP9UOB_Tom> mattbrejza: MCP1640 costs about 50 eurocents
[16:55] <Hix> I'm on the edge of Epping Forest
[16:55] <SP9UOB_Tom> and its easier to solder
[16:55] <mattbrejza> paying for devices from ti/linear/maxim is a new thing for me
[16:55] <mattbrejza> yea i had to reflow
[16:56] <mattbrejza> i think it works to lower voltages but the effiency is a bit crap
[16:56] <SP9UOB_Tom> mattbrejza: but small power looses (going into heat) are good for habbing :-)
[16:57] <daveake> In which case, add batteries and use a linear reg :)
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[16:57] <daveake> But yes the step-ups aren't that efficient off a single cell especially when it's near the end of the discharge curve
[16:57] <OM1ATS> Tom, temp -55 U bat 1.02V but still no burst
[16:58] <SP9UOB_Tom> OM1ATS: signal is so stable - im think its still ascending
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[16:58] <SP9UOB_Tom> OM1ATS: what signal strength?
[16:59] <Hix> http://widerimage.co.uk/docs/IMG_20130127_161516.jpg is the famous 1/4 wave, working perfectly
[16:59] <OM1ATS> stable S3-S4
[16:59] <Hix> sorry about the size though
[17:00] <mattbrejza> SP9UOB_Tom: what freq? the globaltuner is free
[17:00] <mattbrejza> not that its updating
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[17:00] <SP9UOB_Tom> 437.59815
[17:00] <SP9UOB_Tom> dial
[17:00] <mattbrejza> thaks
[17:01] <mattbrejza> hmm not even noise :/
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[17:02] <mattbrejza> oh lol theres a start audio button
[17:03] <GMT> !
[17:06] <SP9UOB_Tom> maybe its floating now - it should burst about 30 minutes ago
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[17:06] <Lunar_Lander> btw
[17:06] <Lunar_Lander> if you have a directional antenna on the ground
[17:07] <Lunar_Lander> shouldn't you be able to try a triangulation?
[17:07] <Lunar_Lander> with two other people of course
[17:07] <OM1ATS> maybe... U bat 0.96V
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[17:07] <SP9UOB_Tom> I have omni antenna
[17:08] <dharnke> I have this code to track my GPS receiver, http://pastebin.com/d9hCD1dH, i know the error is in the loop, but have no idea how to fix it
[17:09] <SP9UOB_Tom> it will die soon (at about 0.6V)
[17:10] <dharnke> With the code my GPS talks to the satellites and transmit simultaneously, but what it transmits is incorrect
[17:10] <daveake> What's it doing?
[17:10] <daveake> btw you don't want \n at the end of your sprintf(DATASTRING line
[17:11] <daveake> should be "%d*", not "%dl;\n"
[17:12] <dharnke> ok ill change that right away
[17:12] <jonsowman> both your usernames begin with 'd' and end with 'ke', and irssi has coloured you the same
[17:12] <jonsowman> super confusing
[17:12] <daveake> Next: Each time round the loop you're sending a complete line of telemetry, which is fine, but you're only picking up one character from the GPS
[17:13] Nick change: daveake -> notdave
[17:13] <notdave> better?
[17:13] <jonsowman> ta
[17:13] <notdave> np
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[17:14] <lz1dev> SP9UOB_Tom: dial ?
[17:14] <SP9UOB_Tom> lz1dev: 437.5972
[17:14] <notdave> I don't use tinygps, but from what you've done it looks like it expected to have NMEW chucked at it until it gets a sentence. So this that you've written:
[17:14] <notdave> int c = Serial.read();
[17:14] <notdave>
[17:14] <notdave> if (gps.encode(c))
[17:14] <dharnke> I get: c}jw{~XOAAiAA1A1A1EIM1A1ee1ee))CE6 C%\0,0,123,0,99,99**BCE6
[17:14] <notdave> needs to be a loop
[17:15] <notdave> IOW loop while there are characters available (test Serial.available() IIRC)
[17:15] <SP9UOB_Tom> 0.89V
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[17:16] <notdave> dharnke I kinda doubt you've got 99 sats
[17:16] <notdave> Also you want one "*" not 2
[17:17] <notdave> btw you're not using altbuf so you can get rid of that
[17:18] <fsphil> ah, code trimming
[17:18] <dharnke> you mean replace the if with a wihile
[17:18] <dharnke> while(gps.encode)
[17:18] <notdave> No, I mean loop whilst there are serial characters to receive
[17:19] <notdave> Actually....
[17:20] <notdave> int c = Serial.read(); is wrong anyway
[17:20] <notdave> As you're using software-serial
[17:20] <dharnke> Also, when i open my serial monitor the dl-fldigi stops working, vice versa
[17:21] <fsphil> jonsowman: weechat had them different colours before. now they're both brown :)
[17:21] <jonsowman> fsphil: heh yes
[17:21] <jonsowman> annoying isn't it
[17:21] <jonsowman> :D
[17:21] <fsphil> you can't win
[17:21] <jonsowman> nope
[17:21] Nick change: notdave -> CantPleaseEveryo
[17:21] <jonsowman> :D
[17:21] <fsphil> that's better ;)
[17:21] <fsphil> it's now cyan
[17:21] <jonsowman> you're cyan
[17:21] Nick change: CantPleaseEveryo -> BufferTooSmall
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[17:21] <Lunar_Lander> in xchat, all of you are written in black
[17:22] <fsphil> that's brown
[17:22] <Lunar_Lander> xD
[17:22] <fsphil> Lunar_Lander: you're blue
[17:22] <BufferTooSmall> Also ... in your loop you have while(1). That's not going to end well (or at all)
[17:22] <Lunar_Lander> nice :)
[17:22] <OM1ATS> Tom, temp -57 U bat 0.70V
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[17:22] <SP9UOB_Tom> OM1ATS: CPU stoped working
[17:23] <BufferTooSmall> dharnke I suggest you think about what your loop() function should do, then write it down at a high level. e.g.:
[17:23] <SP9UOB_Tom> and is off
[17:23] <BufferTooSmall> while (still waiting for gps)
[17:23] <BufferTooSmall> Get stuff from serial and try to parse
[17:23] <BufferTooSmall> Send sentence
[17:23] <BufferTooSmall> Something like that
[17:23] <BufferTooSmall> At the mo your code is a biit confused
[17:24] Nick change: BufferTooSmall -> daveake
[17:24] <OM1ATS> yes off... last packet $$$$$$SP9UOB,720,17:22:09,0,0,0,0,0,0,70,-57*A3E5
[17:25] <daveake> anyway afk cooking
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[17:25] <Hix> I think this afternoon's level of unprecedented success calls for some imbibing :D
[17:26] <fsphil> or just cake
[17:26] <fsphil> everyone loves cake
[17:26] <fsphil> chocolate cake
[17:26] <SP9UOB_Tom> gps drain the battery
[17:26] <SP9UOB_Tom> OM1ATS: Thanks !
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[17:30] <OM1ATS> Tom, Thanks too for fun :)
[17:31] <SP9UOB_Tom> OM1ATS: i have some helium and ballons left :-)
[17:31] <Hix> cake won't cut it, pardon the pun
[17:32] <OM1ATS> ...and new GPS :)
[17:32] <SP9UOB_Tom> i need better insulation
[17:34] <OM1ATS> insulation ? Problem with GPS because of the cold ?
[17:34] <SP9UOB_Tom> OM1ATS: i think so - it looks detuned
[17:35] <SP9UOB_Tom> it was drawing MUCH current
[17:36] <OZ1SKY_Brian> what a shame :-)
[17:36] <OZ1SKY_Brian> i mean :-(
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[17:39] <SP9UOB_Tom> OZ1SKY_Brian: next time i'll launch u-blox
[17:40] <OZ1SKY_Brian> yes, but when experimenting you learn and sometimes you loose. Thats the deal when experimenting, no game no gain.
[17:41] <OZ1SKY_Brian> If everyone play it safe, nobody learn anything new :-)
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[17:41] <OZ1SKY_Brian> But agree, its not fun to loose
[17:42] <OZ1SKY_Brian> what batts did you use?
[17:46] <SP9UOB_Tom> OZ1SKY_Brian: Energizer Lithium - just ONE battery
[17:47] <SP9UOB_Tom> OZ1SKY_Brian: http://sp9uob.verox.pl/sputnik-2/small-IMG_0026.JPG
[17:47] <OZ1SKY_Brian> ok good batts
[17:47] <SP9UOB_Tom> OZ1SKY_Brian: http://sp9uob.verox.pl/sputnik-2/small-IMG_0028.JPG
[17:47] <OZ1SKY_Brian> also what i used in mine
[17:47] <OZ1SKY_Brian> but 4 of them :-)
[17:48] <OZ1SKY_Brian> overkill, but wanted to be sure :-)
[17:49] <OZ1SKY_Brian> we had 2 camaras on, so i played it safe
[17:50] <OZ1SKY_Brian> oh and 2 GSM trackers. So we realy wanted to find it again
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[17:56] <jiffe1> so I have been doing the calculations on antenna gain and free space loss and I'm coming up with my 8W 2 meter signal dropping to 500pW after 30 miles, does that sound right?
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[17:59] <jonsowman> that's -63dBm
[17:59] <jonsowman> sounds reasonable
[18:00] <jonsowman> perhaps even a bit on the high side
[18:03] <jiffe1> my receiver is rated down to 160nW though, doesn't even come close
[18:04] <jonsowman> which receiver?
[18:04] <jonsowman> I had a spreadsheet for FSPL calcs but I cannot find it
[18:04] <jiffe1> kenwood d700a
[18:05] <jiffe1> I used http://en.wikipedia.org/wiki/Free-space_path_loss for the path loss
[18:06] <jonsowman> jiffe1: does it give a sensitivity in volts?
[18:06] <jiffe1> you're right that is in uV
[18:06] <jonsowman> 500uV?
[18:06] <jiffe1> .16uV
[18:06] <jonsowman> oh ok
[18:06] <jonsowman> good
[18:06] <jonsowman> that sounds about right
[18:07] <jonsowman> the FT-817 is .25uV iirc
[18:07] <jonsowman> ish
[18:09] <jiffe1> don't suppose P=V^2/R works in this case
[18:10] <jonsowman> heh there are some rules of thumb
[18:10] <jonsowman> aha
[18:10] <jonsowman> jiffe1: https://dl.dropbox.com/u/62498867/FSPL.xls
[18:11] <jonsowman> I made this several years ago (I was in lower sixth i.e. 17) and therefore can't guarantee the maths
[18:11] <jonsowman> however from a brief look over it appears to be OK
[18:11] <jonsowman> see how it correlates with yours
[18:14] <SP9UOB_Tom> https://www.facebook.com/photo.php?fbid=597182406974192&set=a.588030081222758.152692.100000473142757&type=3&theater
[18:14] <SP9UOB_Tom> few seconds after launch :-)
[18:17] <jcoxon> nice
[18:17] <jcoxon> those balloons are tiny
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[18:17] <jiffe1> is altitude basically distance or are you taking some differential in altitude loss into account?
[18:18] <jonsowman> straight line distance
[18:18] <SP9UOB_Tom> jcoxon: payload was 32 gram
[18:18] <SP9UOB_Tom> jcoxon: https://plus.google.com/photos/108111435264693957520/albums/5838183452993009521/5838183466297418194
[18:19] <jcoxon> cool
[18:19] <jiffe1> that gives me -63.55dB
[18:19] <jcoxon> bbiab
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[18:19] <jiffe1> so probably about right then
[18:19] <jonsowman> :)
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[18:21] <jonsowman> jiffe1: is that -63dBm at the receiver antenna terminals?
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[18:21] <jiffe1> it is
[18:21] <jonsowman> is that at 10mW 70cms?
[18:21] <jiffe1> and looks like you are using P=V^2/R there to get the uV value
[18:22] <jiffe1> no that's with my 8W 2 meter
[18:22] <jonsowman> jiffe1: right ok
[18:22] <jonsowman> jiffe1: yeah, should be factor of ½ in there, I have since learned
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[18:22] <jonsowman> P = V²/2R
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[18:25] <jiffe1> this is really handy, shows me 10mW works over 30 miles too
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[18:25] <jonsowman> :)
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[18:28] <SP9UOB_Tom> jcoxon: those ballons are ideal to test. they need small helium volume ;-)
[18:28] <SP9UOB_Tom> i have 4 of them by now
[18:29] <chris_99> does anyone use hydrogen out of curiousity
[18:32] <Randomskk> jonsowman: that godforsaken 2.
[18:33] <jonsowman> Randomskk: haha yes
[18:33] <jonsowman> terribly memories
[18:33] <jonsowman> +e
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[18:46] <SP9UOB_Tom> is there possibility to export data from habhub but including those with no fix?
[18:47] <SP9UOB_Tom> just want to traw battery discharge curve
[18:47] <SP9UOB_Tom> draw
[18:47] <Randomskk> http://habitat.habhub.org/ept ?
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[18:47] <SP9UOB_Tom> Randomskk: i know, but it filter 0,0, lat/lon lines
[18:48] <Randomskk> it does?
[18:48] <Randomskk> it should show anything that got parsed
[18:48] <SP9UOB_Tom> Randomskk: not showing
[18:49] <Randomskk> should be. whta payload?
[18:49] <SP9UOB_Tom> export ends at 415,15:50:38,48.807418117,19.9988231,11819,91,166,10,1.18,-51
[18:49] <Randomskk> maybe the no-gps-lock setting was wrong
[18:49] <Randomskk> or at least not helpfuk
[18:49] <Randomskk> did you have a sentence format for when it doesn't have lock?
[18:50] <SP9UOB_Tom> $$$$$$SP9UOB,691,17:13:27,0,0,0,0,0,0,92,-56*DD22
[18:50] <Randomskk> no I mean on the config document
[18:51] <SpeedEvil> https://www.youtube.com/watch?v=d78zwwHDdO8&feature=youtube_gdata_player
[18:51] <SpeedEvil> (unrelated)
[18:52] <SP9UOB_Tom> Randomskk: i've checked "when no fix lat and lon are 0" or sth
[18:53] <Randomskk> hm
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[19:06] <SP9UOB_Tom> ok, i have voltage graph: http://sp9uob.verox.pl/sputnik-2/voltage.png
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[19:12] <HixPad> What is the correct name for the crimp pins that connect to header pins, also any links for buying them?
[19:13] <fsphil> crimp terminals?
[19:15] <HixPad> Fair enough, badly worded question. What is the spec? Rs listing in excess of 4000 differing items
[19:15] <Randomskk> there are loooads of different types of crimps and headers
[19:15] <fsphil> 2.54mm/1"
[19:15] <fsphil> if you're taking about the standard arduino ones
[19:15] <Randomskk> fsphil probably means 0.1"
[19:15] <fsphil> er
[19:15] <fsphil> yea that
[19:15] <fsphil> 1" would be interesting
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[19:16] <fsphil> http://cpc.farnell.com/harwin/m20-1180046/crimp-terms-tin-100-pack/dp/CN10005 might be what you're after
[19:16] <HixPad> Spot on, cheers
[19:17] <HixPad> Guessed 1" may be a typo
[19:17] <fsphil> the 2.54mm ones are still quite big
[19:17] <fsphil> when a header is plugged into them they stand quite tall
[19:18] <fsphil> I got a nice crimp tool from ebay
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[19:26] <HixPad> This one? www.ebay.co.uk/itm/Ratchet-Crimp-Crimper-Crimping-Tool-Molex-PC-Plug-Headers-Fan-2-54mm-HT-225D-/130660824262#ht_1220wt_902
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[19:27] <SP9UOB_Tom> one more: http://sp9uob.verox.pl/sputnik-2/temperature.png
[19:28] <fsphil> that looks like it HixPad
[19:28] <Lunar_Lander> SP9UOB_Tom, yay gnuplot again :)
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[19:29] <HixPad> Was wondering what it was plotted with
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[19:36] <HixPad> Damn, that link has sold out. But there is another seller for less www.ebay.co.uk/itm/Crimping-Tool-PC-Connectors-Molex-PCIe-HT-225D-2-54mm-Terminal-Crimper-/190728447751?_trksid=p3284.m263&_trkparms=algo%3DSIC%26its%3DI%26itu%3DUCI%252BIA%252BUA%252BIEW%252BFICS%252BUFI%26otn%3D21%26pmod%3D180995048159%26ps%3D54
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[19:36] <HixPad> Eww ugly link
[19:40] <Lunar_Lander> SP9UOB_Tom, do you use linux btw?
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[19:53] <SP9UOB_Tom> Lunar_Lander: only
[19:54] <Lunar_Lander> :) that is good
[19:54] <Lunar_Lander> hi mclane
[19:54] <mclane> hi lunar
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[20:53] <MrCraig> night night all
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[21:23] <SP9UOB_Tom> ok, night all
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[22:39] <bambu> Oh man, no way.
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[22:40] <fsphil> way dude
[22:40] <bambu> This is the coolest channel I've visited in months!
[22:40] <fsphil> there are other channels?!
[22:40] <jarod> #coolest
[22:40] <bambu> Not now.
[22:41] <jonsowman> glad to hear it
[22:44] <bambu> I am interested in balloons, but around here DIY airplanes are a little more prominent.
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[22:44] <bambu> I'm glad I found the site/chan, already lots of goodies.
[22:45] <cuddykid> some cheap cable ties -> http://www.amazon.co.uk/gp/product/B00904S2T8/ref=nosim/?tag=hotukdeals-21
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[22:45] <jonsowman> cuddykid: following @hukd as well?
[22:45] <jonsowman> ;)
[22:46] <jonsowman> they're a bit small for HAB stuff really but I bought some for other stuff
[22:46] <cuddykid> yeah :) well, not on twitter, but check their website every day - picked up some good bargains over the past few months
[22:46] <cuddykid> yeah, they are on the small side
[22:46] <jonsowman> my problem is that I find things and go "oh that's cheap I'll get one/some" whereas had I not seen it, I'd not have bought it and saved even more
[22:47] <bambu> :p
[22:48] <fsphil> or more likely "oh I need one of those" without realising you already had five
[22:48] <jonsowman> that too
[22:48] <cuddykid> jonsowman: true!
[22:48] <fsphil> I bought a magazine not long ago and realised by the second page I'd already read it
[22:48] <jonsowman> haha
[22:49] <cuddykid> I have been on a couple of wild goose chases too.. when tesco have their glitches on. Often they have paid off though
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[22:49] <fsphil> hope the linux format people appreciate me buying an issue twice!
[22:49] <jonsowman> haha
[22:49] <jonsowman> I'm sure they do
[22:49] #highaltitude: mode change '+o jonsowman' by ChanServ!ChanServ@services.
[22:49] Topic changed on #highaltitude by jonsowman!jonsowman@kryten.hexoc.com: Welcome to #highaltitude - discuss anything to do with high altitude projects (balloons, gliders, etc) www.ukhas.org.uk
[22:49] <fsphil> actually there was a new linux mag in tesco today
[22:49] #highaltitude: mode change '-o jonsowman' by ChanServ!ChanServ@services.
[22:49] <daveake> I bought a belt sander without remembering I already had one (completely unused)
[22:49] <jonsowman> nice
[22:49] <fsphil> ok that's worse
[22:50] <jonsowman> now you can have one in each hand
[22:50] <jonsowman> and get the work done twice as fast
[22:50] <SpeedEvil> daveake: my house is the perfect example of that
[22:50] <daveake> No, what's worse is that when I used it I got a finger stuck in it ...
[22:50] <jonsowman> ouch
[22:50] <SpeedEvil> daveake: it has historically been very, very unorganized
[22:50] <fsphil> your poor fingers
[22:50] <daveake> finger
[22:50] <SpeedEvil> daveake: I'm now finally getting it organised
[22:50] <fsphil> I'm thinking of the last time you showed us a picture of your finger
[22:50] <SpeedEvil> I have a box with six irons in
[22:50] <daveake> finger that became a finger without (much of) a nail
[22:51] <daveake> had to get that sorted at the local "minor injuries unit"
[22:51] <daveake> where, for a laugh, they had a kiddies playpen full of plastic pretend electric tools :p
[22:51] <fsphil> so, an injuries unit for minors?
[22:52] <daveake> hah
[22:52] <daveake> No, so the kids could take the piss out of their injured parents, I guess
[22:52] <fsphil> lol
[22:53] <daveake> Anyway I sold it at a car boot sale
[22:53] <daveake> Complete with a mark around the belt
[22:53] <bambu> What got everyone interested in balloons? I've always been into radio communications, that kind of morphed over into this.
[22:53] <daveake> I assume the buyer didn't realise what the mark was made of
[22:54] <daveake> Photography from "spaaaace" in my case
[22:54] <jonsowman> bambu: HABs turned out to be a good platform for testing long range low power telemetry systems
[22:54] <bambu> I also don't believe pictures of space unless I take them myself, so daveake that plays a role.
[22:54] <bambu> As far as I know, the earth is triangular.
[22:54] <fsphil> bambu: it's a kind of merger of all my hobbies in one
[22:54] <daveake> it's flat. GoPros bend it.
[22:55] <daveake> same here - photography, electronics, software, travel, bacon butties
[22:55] <fsphil> it does curve slightly, but it's not huge
[22:55] <fsphil> if you where up there you'd probably just notice it
[22:55] <bambu> What is the common use of go pros?
[22:56] <bambu> Everybody is using a go pro for something.
[22:56] <fsphil> I used one to film my dog once
[22:56] <jonsowman> they're very suitable for this purpose
[22:56] <fsphil> he didn't do very much
[22:56] <daveake> They have a very wide field of view, and an attendant distortion. I'm not a fan
[22:56] <jonsowman> depends a bit on the config, but true
[22:57] <daveake> They are however sharp
[22:57] <jonsowman> the medium/narrow modes aren't too bad
[22:57] <Randomskk> the 3s are a bit less curvacious
[22:57] <bambu> I used a go pro snow boarding, and after that day never really liked them.
[22:57] <jonsowman> the wide angle one is ridiculous
[22:57] <bambu> This was when they first started selling them at the base.
[22:57] <fsphil> hehe, yea you get the curve of the earth -- before you launch
[22:57] <fsphil> I do like my gopro2
[22:57] <daveake> lol
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[22:58] <fsphil> I'd like to have better software to correct the projection
[22:59] <fsphil> there is nothing decent on linux, and I can't write it as it involves Scary Maths
[22:59] <bambu> fsphil: You mean like projecting what a flight would do?
[23:00] <bambu> That would be an awesome piece of code.
[23:00] <jonsowman> http://habhub.org/predict
[23:00] <fsphil> like this? http://habhub.org/predict/
[23:00] <jonsowman> enjoy
[23:00] <bambu> Oh man, that hit me quick.
[23:00] <fsphil> lol
[23:01] <fsphil> I meant correcting for the wide lens on the gopro
[23:01] <bambu> I can't chat anymore, my brain is slowing down.
[23:01] <bambu> Thanks for the awesome chat :)
[23:01] <Randomskk> fsphil: it's not that scary!
[23:01] <fsphil> I know
[23:01] <Randomskk> it is computationally sucky though, especially at 1080p 48fps
[23:01] <fsphil> it's the modelling of the lens bit
[23:01] <Randomskk> and the results have lots of meh out of frame bits
[23:01] <Randomskk> meh
[23:02] <Randomskk> one photo of a chequerboard will get you the transformation matrix
[23:02] <fsphil> I was thinking of a grid
[23:02] <fsphil> but that would be better
[23:02] <Randomskk> grid basically works just as well
[23:02] <Randomskk> it mostly just comes down to knowing where to move each pixel
[23:02] <Randomskk> doing it fast is I guess the harder bit
[23:03] <fsphil> if I can get that, then it wouldn't be a huge leap to then projecting it onto another sphere -- a model of the surface
[23:03] <Randomskk> but all gopros should be pretty similar. though I think the waterproof case acts as additional lensing
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[23:04] <fsphil> I worked on a ray-tracer once in school but I've forgotten all the important bits :)
[23:04] <fsphil> and that code is long gone
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[23:09] <Randomskk> I feel like I should write a ray tracer one day :P
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[23:15] <fsphil> it's all the rage :)
[23:15] <Randomskk> :P
[23:16] <Randomskk> reading about unary classification instead. ugh.
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[00:00] --- Mon Jan 28 2013