highaltitude.log.20150922

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[00:05] <Guest15795> http://www.picaxeforum.co.uk/entry.php?190-AXEtimeter-I-model-rocket-datalogger-part-1
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[02:18] <Guest15795> http://www.picaxeforum.co.uk/entry.php?190-AXEtimeter-I-model-rocket-datalogger-part-1
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[07:35] <RealBorg> NASA's most important research experiment EVER: http://www.nasa.gov/mission_pages/station/research/experiments/1769.html
[07:36] <eroomde> i knew before looking at the URL that it would involve the ISS
[07:36] <eroomde> they really have no idea what they hell to do with that thing
[07:39] <RealBorg> i like to quote robert zubrin: ""The purpose of spaceships is to actually travel across space and go to new worlds not to hang out in space and observe the health effects of doing so"
[07:41] <RealBorg> what if they sent up a rocket engine, attach it to the iss and move it to orbit mars? ;)
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[07:41] <fsphil> even the moon would be an improvement
[07:41] <eroomde> i don't like to quote robert zubrin because he seems like a doofus
[07:41] <eroomde> and i presume you're joking with the mars thing
[07:41] <fsphil> or just a higher earth orbit
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[07:43] <RealBorg> fsphil, thanks, but there's nothing glue and duct tape cannot fix ;)
[07:44] <fsphil> a broken heart
[07:44] <gonzo_> you need beer for that
[07:44] <fsphil> hah
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[07:45] <RealBorg> nah, alcohol is for making ugly stupid people to appear fuckable
[07:45] <gonzo_> if it's not doing anything else, iss keeping lots of ex-soviet space people employed, who may have gone to work for other 'organisations'
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[07:45] <gonzo_> RealBorg, yep, great isn't it!
[07:47] <RealBorg> yesterday I came up with the thought that those moon-landing-deniers may refuse to accept that todays society is less advanced than it was back than
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[07:59] <gonzo_> would they be conspiracy nuts in tights?
[08:01] <RealBorg> just trying to understand why there are so many conspiracy nuts out there
[08:02] <gonzo_> maybee they just like hosiery
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[08:03] <pb0ahx> mogge
[08:04] <pb0ahx> rong screen
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[08:26] <chimpusm_> Morning, I'm having a few nightmares again with a GoPro once its within my payload. It simple appears to be shutting down due to heat. I'm assuming this will be even worse at altitude due to less air pressure?
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[08:32] <fsphil> is it hot when you take it out?
[08:32] <fsphil> I've heard the newer gopros get pretty toasty
[08:45] <chimpusm_> Yeah gets toasty..
[08:46] <chimpusm_> I got it over xmas with some vouchers from work so was pretty cheap, otherwise i would have just kept using my mobius.
[08:47] <chimpusm_> I'm testing at lower res to see if it will run cooler.
[08:48] <chimpusm_> Reading around the web it does seem to be an issue and people are struggling to get 30 minutes before it shuts down.
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[09:01] <eroomde> this is causing some amusement http://horizonsas.com/
[09:01] <eroomde> literally no one at westcott - where they claim to be - has heard of these people
[09:01] <eroomde> or know anyone who knows anyone who knows anything about them
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[09:05] <jokke_> eroomde: and even launching from UK
[09:05] <chimpusm_> Ross Tierney is the founder and CEO
[09:06] <craag> website looks too fancy to be a hardware company :P
[09:09] <eroomde> chimpusm_: you know him?
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[09:11] <SpacenearUS> New vehicle on the map: 03123_chase - 12http://tracker.habhub.org/#!qm=All&q=123_chase
[09:14] <UpuWork> https://www.linkedin.com/pub/ross-tierney/1a/300/524
[09:15] <UpuWork> IT Engineer who got bored and decided he wanted to go into space
[09:15] <chimpusm_> eroomde: nope just a google search
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[09:16] <jokke_> So wannabe Elon Musk?
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[09:16] <gonzo_> or wants to sell shares to gullibles
[09:22] <eroomde> you have to be elon musk i think to have a go at that
[09:22] <eroomde> you need a few tens of millions of f-u money that you don't need anyone's permission to spend to get enough people and hardware and momentum going that people have to start listening to you
[09:32] <Laurenceb> lol that site
[09:32] <Laurenceb> looks like random startup generator
[09:33] <Laurenceb> http://tiffzhang.com/startup/?s=774594429316
[09:35] <Laurenceb> yup
[09:35] <Laurenceb> http://horizonsas.com/about-us/
[09:35] <Laurenceb> Vision: Mission: DIFFERENT
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[09:38] <Laurenceb> wait DIRECT launcher?!
[09:38] <Laurenceb> haha
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[10:03] <Someone__> hey pals, do you know where i can buy balloons and helium on net ??
[10:05] <Geoff-G8DHE-Lap> Balloons http://randomsolutions.co.uk/Random_Aerospace/Balloons.html
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[10:05] <Someone__> thanks :D
[10:07] <Someone__> don't you know a site that delivers to tunisia ??
[10:07] <RocketBoy> that one will
[10:07] <daveake> :)
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[10:08] <Geoff-G8DHE-Lap> No idea I'm afraid
[10:08] <Geoff-G8DHE-Lap> But you have the answer above
[10:08] <RocketBoy> :-)
[10:09] <Someone__> oh okay i'm gonna try that one ! thank you all anyway :D
[10:09] <UpuWork> lol
[10:10] <chimpusm_> is this nay use http://www.linde-gas.tn/en/products_and_supply/balloon_gas_and_more/index.html ?
[10:11] <Someone__> no i think it's not weather balloons but those little ones that we use in parties !!
[10:12] <chimpusm_> Try them, if they anything like the UK BOC they will supply both
[10:13] <Someone__> oh yeah i think the they're both the same !! i'll try them !! thanks :D
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[10:16] <RocketBoy> Linde own BOC
[10:17] <chimpusm_> :-)
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[10:21] <chimpusm_> RocketBoy: Do you have any flights planned from Elsworth this year?
[10:25] <RocketBoy> nothing planned - but I may run a day shortly - poss this w/e - Ill let you know
[10:28] <chimpusm_> Thanks Steve. Bit of an expensive payload on this one so will be wanting some nice conditions for a nice up and down. GoPro is doing my head in mind...
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[10:39] <michal_f> are there any alternatives do SDR sharp that could auto-tune to driffting signal ?
[10:43] <fsphil> AFC would be handy in an sdr app
[10:44] <eroomde> all i want for christmas is an up to date rs catalogue
[10:44] <eroomde> paper copy
[10:46] <michal_f> fsphil: what is AFC ?
[10:47] <fsphil> auto frequency correction
[10:47] <fsphil> "Automatic Frequency Control" according to ye old wiki
[10:47] <michal_f> I wonder if it's possible to setup unattended listener station
[10:48] <michal_f> I can't be at home and in chase car at the same time :)
[10:48] <fsphil> I've used VNC in the past for that
[10:48] <fsphil> though it's quite slow over 3G
[10:49] <fsphil> my home station normally uses an FT817 which dl-fldigi can retune
[10:49] <fsphil> so it does normally track all by itself once it's tune in
[10:49] <michal_f> yeah, I will go with teamviewer if I dont find anything better
[10:49] Nick change: fl_0|afk -> fl_0
[10:49] <michal_f> I use airspy and sdr sharp
[10:49] <fsphil> I did get dl-fldigi controlling gqrx recently but it was seriously hacky
[10:50] <Geoff-G8DHE-Lap> The biggest problem is finding the initial frequency, after that dl-fldigi has AFC and control of the Rx
[10:50] <Geoff-G8DHE-Lap> SDR-Radio/Console can be controlled directly by dl-fldigi
[10:51] <fsphil> ^ that should work then, if you enable the dl-fldigi feature that retunes when the signal drifts too far
[10:51] <michal_f> I will have to try that
[10:51] <Geoff-G8DHE-Lap> have it set at +/- 20Hz works pretty well for RTTY
[10:52] <Geoff-G8DHE-Lap> about the only other thing is to widen the tone bandwidth a bit as some trackers can shift out of the bandwidth very fast!
[10:53] <Geoff-G8DHE-Lap> and then its lost till manual intervention, but its only a few older ones that suffer that.
[10:53] <michal_f> ty Geoff-G8DHE
[10:54] <Geoff-G8DHE-Lap> I have RigCat files to use with dl-fldigi and SDR radio if you need them
[10:56] <Geoff-G8DHE-Lap> http://360.g8dhe.net/HAB_Flights/sdr_test_VFO.zip
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[10:59] <michal_f> I don't know what they are, but probably I need them
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[11:00] <Sirius-BE> https://criticalengineering.org/projects/deep-sweep/
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[11:46] <eroomde> Sirius-BE: shame they're not really doing much effort with flight tracking
[11:46] <eroomde> for a payload that ambitious the tracking could be a great deal better
[11:51] <Sirius-BE> yep... it seems that habhub is unknown to them
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[12:26] <eroomde> don't even need habhub - just a radio!
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[12:28] <Sirius-BE> sure, at least APRS
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[12:34] <craag> It looks like they didn't find a radio method that was legal airborne
[12:35] <craag> Which is fair enough for first time habbers wanting to do it their own way, hopefully google/generic-search-engine will enlighten them soon :)
[12:36] <gonzo_> They identified that realtime downlink of the survey data was not feasable outside of .gov type allocations
[12:36] <gonzo_> but they relied on just gsm for tracking?
[12:37] <gonzo_> I think I said yesterday, two of their three radio experiments was a waste of time
[12:37] <gonzo_> (one had no chance of getting any data at all)
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[12:41] <craag> Meh, at least they tried it. We've been talking about flying sdrs for a while, but no-one here has actually done it afaik
[12:41] <gonzo_> true
[12:42] <Laurenceb> irony defined https://twitter.com/jimmy_wales/status/560688102680064000?ref_src=twsrc^tfw
[12:42] <gonzo_> their UHF rx was prob likely to produce useful data
[13:04] <fsphil> I'd love to launch one but odds of me getting it back are slim :)
[13:11] <craag> what band would people be most interested in?
[13:12] <craag> relative density on different parts of the hab 434 segment might be mildly useful I guess
[13:12] <craag> but would have to timeshare with the tracker :P
[13:14] <craag> I wonder if you could plot population density by noise power on 2.4Ghz from a downwards-pointing antenna..
[13:19] <fsphil> I'd have it hop between a few bands
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[13:19] <fsphil> would be curious to hear the FM broadcast band at 30km
[13:19] <fsphil> and 144.800 should be pretty full
[13:20] <fsphil> would be fun if another balloon was in the air at the same time, or maybe just landing
[13:20] <fsphil> see if it can be tracked all the way down to the ground
[13:20] Nick change: fl_0|afk -> fl_0
[13:20] <craag> mm
[13:21] <fsphil> of course it wouldn't be able to be decoded until after
[13:21] <craag> also dave's lora repeater worked well - it would be good to see another go at that
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[13:31] <gonzo_> there was soem talk a while ago of doing somethbinbg like a licence exempt 434meg APRS thingy
[13:32] <gonzo_> if it were to be Fm, then digipeating balloons would be possib;le
[13:32] <gonzo_> and more groundstations could RX it if it were open source
[13:32] <craag> Well the most reliable lora mode we've found is 40KHz, with 10% DC
[13:32] <craag> So that leaves room for a sentence to be repeated
[13:33] <gonzo_> from what I've read it soulds good, all except being tied into bespoke HW
[13:33] <gonzo_> will never get the same coverage as the fldigi listerner network
[13:34] <craag> Yeah the issue is finding something that can be done simply (hw size+cost), but yet has enough link budget
[13:36] <craag> lora currently fits well, but proprietary..
[13:36] <fsphil> which kinda kills it
[13:36] <gonzo_> as much as I hate the idea, having an FM AFSK packet would open up to a hige listener base, which may compensate for the link budget
[13:36] <gonzo_> (or interleave afsk with rtty)
[13:37] <fsphil> I'm a fan of picking one mode and sticking with it
[13:37] <gonzo_> switching mopdes would eb an arse for the AFC
[13:37] <fsphil> yeah exactly. any flights that did it previously where a pain to track
[13:37] <gonzo_> tghough the newer modules are not as drifty as the old ntx2
[13:38] <fsphil> true
[13:38] <fsphil> still annoying
[13:38] <craag> fm afsk doesn't really have the link budget to permit any kind of small receiver on 10mW
[13:38] <fsphil> even an rtlsdr would be better than an fm-only receiver
[13:39] <craag> eg. a wouxon handheld didn't have enough sensitivity to demod an LoS transmitter
[13:39] <craag> (matt tested this with turbohab fsk, on afsk fm)
[13:39] <gonzo_> supprised, as some of them are frighteningkl
[13:40] <gonzo_> ly sensitiove
[13:40] <fsphil> I've tried listening to a few payloads on the FT817 in FM mode. got nothing
[13:40] <fsphil> though that was ~500km distance
[13:40] <gonzo_> I've hear close ones fully quietening on a hheld
[13:41] <gonzo_> dumbing dow, but it would greatly similify the groundstation so some of the 'how not to' flights may have been more successful
[13:42] <gonzo_> (Thpough even that would not have compensated for not connecting an antenna)
[13:42] <fsphil> seems like it would be going backwards
[13:42] <fsphil> don't support inappropriate hardware, encourage people to get something better
[13:43] <gonzo_> or make the first step easilly achieveable and get people onboard with an early success
[13:43] <fsphil> AFSK is stuck in 1200 baud land forever because of it
[13:43] <fsphil> *APRS sorry
[13:45] <craag> adam's psk is a very cool step up from rtty. However the complexity (even on tx) goes up massively from rtty.
[13:45] <gonzo_> I've not graduated up to APRS yet!
[13:46] <craag> And an embedded receiver would be a reasonable challenge
[13:46] <fsphil> would love to do that. tried FM demodulation on an avr, failed badly :)
[13:47] <gonzo_> I started writing an rtty decode, for commanding, but then found the RX modules I had were not useable
[13:49] <craag> most successful telecommand links I've seen used either OOK, with nrx receiver and sw decoder, or rfm22 native packet, recorded by sdr, and then replayed as audio into a ham rig for tx power. rfm22 receiver and demod.
[13:51] <fsphil> easy to generate the packets on an sdr now. just needs a filter and amp on the output
[13:52] <gonzo_> I was hoping I could use an rx2 module and use a few khz of keyying shift to get a transition
[13:52] <fsphil> or just pc > ham rig > rf directly
[13:52] <fsphil> if the bandwidth is narrow enough
[13:52] <gonzo_> the bw of an rx2 was not enough
[13:52] <gonzo_> not to see keying within an audio width of an ssb tx
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[14:29] <SpacenearUS> New vehicle on the map: 03VE2ESM-11 - 12http://tracker.habhub.org/#!qm=All&q=VE2ESM-11
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[15:01] <SpacenearUS> New vehicle on the map: 03KC9QOV-11 - 12http://tracker.habhub.org/#!qm=All&q=KC9QOV-11
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[17:34] <Lunar_Lander> hello
[17:35] <SpacenearUS> New position from 03VE2WMG-11 after 0319 hours silence - 12http://tracker.habhub.org/#!qm=All&q=VE2WMG-11
[17:38] <ulfr> hi
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[18:53] <tweetBot> @AmsatUK: Pig in Space - Live transmission of images of Pinky Pig in Near-Space on Friday Sep 25 http://t.co/4hUOdSZGBg #amsat #hamradio #hamr #ukhas
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[18:56] <fsphil> topical
[18:57] <LazyLeopard> ;)
[18:57] <fsphil> not what I imagined when writing ssdv :)
[18:58] <LazyLeopard> "I never expected all these cats."
[18:58] <LazyLeopard> ;)
[19:00] <fsphil> yes, the cats manipulated Tim from the shadows
[19:00] <fsphil> now it's too late to stop them
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[19:33] <eroomde> oooph https://twitter.com/pythoncookbook/status/646406895633342465
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[20:08] <tweetBot> @frogfall: Wonderful timing #piggate #hameron https://t.co/kiM9oI4xnx
[20:08] <fsphil> this really is going to hog twitter for ages
[20:11] <gonzo_nb> they will keep trottering it out
[20:12] <gonzo_nb> (not very good, but I was scratchings about for a pun)
[20:12] <Babs_> Just logged on so this looks a bit off topic ;-), but has anyone ever soldered a chip with this package http://www.adafruit.com/datasheets/MCP73871.pdf?
[20:12] <Babs_> http://www.adafruit.com/datasheets/MCP73871.pdf
[20:13] <Babs_> i have 10 mil traces, using sparkfun rules, but am getting clearance errors
[20:13] <eroomde> Babs_: yes plenty
[20:13] <eroomde> fine with a hot air gun
[20:13] <eroomde> what's your clearance limit?
[20:13] <Babs_> hey eroomde - good to see you a few weeks ago
[20:13] <Babs_> so the clearance is a bit of a misnomer? Its getting clearance errors on the bare chip
[20:14] <eroomde> clearence limits and trace width limits in the drc are differnt things
[20:14] <Babs_> 8 mil
[20:14] <eroomde> most of the fab houses that you can order with easily on t'net are 6mil
[20:14] <eroomde> iirc
[20:15] <Babs_> let me check
[20:16] <Babs_> they can go down to 4
[20:16] <eroomde> see if that fixes it then, i would
[20:17] <eroomde> check that's not an extra cost though - many i've used to 6 standard, 4 for more money
[20:18] <Babs_> http://www.pcbway.com/capabilities.html
[20:18] <Babs_> looks like 6 is workable
[20:19] <eroomde> bingo
[20:19] <eroomde> 6 usually makes most problems go away
[20:19] <eroomde> until you start doing really nasty packages
[20:19] <mattbrejza> mcp73871 is just a sot23 lipo charger?
[20:20] <mattbrejza> (on phone)
[20:21] <eroomde> qfn20 if i glanced at the pdf properly
[20:21] <mattbrejza> oh im getting it mixed up
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[22:18] <SpacenearUS> New vehicle on the map: 03KA7ZDD_chase - 12http://tracker.habhub.org/#!qm=All&q=KA7ZDD_chase
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[00:00] --- Wed Sep 23 2015