highaltitude.log.20091209

[00:06] <Laurenceb> http://uk.farnell.com/national-semiconductor/lm2594m-3-3/switching-reg-0-5a-3-3v-smd-2594/dp/1215200 Ive used this before
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[08:23] <MikeMc> morning
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[11:40] <Randomskk> haha aww
[11:41] <Randomskk> ic7000 arrived, antenna didn't
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[11:43] <SpeedEvil> :)
[11:44] <Randomskk> I stuck a long bit of wire in it to no apparent effect :p
[11:45] <Randomskk> or rather, I can hear plenty of noise
[11:45] <SpeedEvil> :(
[11:45] <Randomskk> not entirely convinced on the design of my "long bit of wire" but it is hanging out the window and quite long
[11:46] <SpeedEvil> does it pick up broadcast/
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[11:48] <Randomskk> hmm, didn't search for any
[11:49] <Randomskk> nothing on 95.8mhz
[11:49] <Randomskk> though the graph does show increased singal level there
[11:49] <Randomskk> oh hello
[11:49] <Randomskk> something is almost there
[11:54] <Randomskk> aha
[11:54] <Randomskk> WFM gets it, of course
[11:54] <Randomskk> okay it can pick up broadcast fm
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[11:59] <Randomskk> no sign of the 60khz signal from msf
[12:04] <Randomskk> still no amateur signals but at least I can listen to radio 1 now haha
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[12:38] <Randomskk> why am I picking up bbc news on 442.360 mhz :/
[12:39] <SpeedEvil> 5th harmonic of 88.4/
[12:39] <Randomskk> so it is
[12:39] <ssapphiree> guys, is that an often situation that a balloon doesn't pop when reaches the highest altitude?
[12:40] <Randomskk> you'd have thought they could filter the fifth harmonic :p
[12:40] <SpeedEvil> ssapphiree: it happens sometimes
[12:40] <Randomskk> SpeedEvil: the 2m/70cm antenna arrived
[12:40] <SpeedEvil> ssapphiree: basically - the balloon is underinflated - so the internal pressure is high enough to compress the internal gas enough that it is no longer bouyant
[12:41] <SpeedEvil> Randomskk: assuming it's not 5th harmonic generated in the reciever
[12:41] <ssapphiree> I see...
[12:41] <Randomskk> true I guess
[12:42] <ssapphiree> so some cut off system is required I guess, because if balloon is stuck at 30 km than it will just fly far away and I will lose the signal, right?
[12:42] <ssapphiree> I'm just planning my first high altitude balloon :)
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[12:56] <SpeedEvil> yes.
[12:56] <SpeedEvil> But that does not happen if you fill the balloon to the proper amount
[12:56] <SpeedEvil> only if you perhaps under half-fill it.
[12:58] <ssapphiree> oh I see
[12:59] <ssapphiree> so if I fill it to normal volume or close to it, there is no need to worry about popping?
[12:59] <SpeedEvil> yes.
[12:59] <SpeedEvil> It will always pop
[12:59] <ssapphiree> great
[12:59] <SpeedEvil> It only does not pop when for some reason you underfill - for example you can get a bit better altitude that wya
[13:00] <ssapphiree> I see
[13:03] <Randomskk> I think I even have this thing set up to use a repeater now
[13:03] <Randomskk> doesn't seem like anyone is on though
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[16:25] <MikeMc> hmmm
[16:25] <MikeMc> random weirdness
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[16:27] <Laurenceb> CC1020 eval board lead time is up to 10 Weeks
[16:27] <Laurenceb> :-/
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[16:30] <Laurenceb> "its very hard to estimate lead time"
[16:30] <Laurenceb> wtf
[16:33] <MikeMc> 10 weeks!
[16:33] <Laurenceb> so I pay them, they think about it... they maybe make up some new boards... at some ponit ship them
[16:42] <Laurenceb> I wish they would just be straightforward
[16:43] <Laurenceb> "no we do not have any board made up" would be sensible
[16:43] <SpeedEvil> http://www.youtube.com/watch?v=lYvM68AtlbA&feature=player_embedded
[16:43] <SpeedEvil> Is it a bird? Is it a plane? Is it a tank venting gas and rotating at about 0.5 revs per second at ~60km altitude from the viewer in sunlight when the viewer is in darkness?
[16:44] <Randomskk> oh hey there are actually people on th repeater now
[16:45] <Laurenceb> spin stabilised sat venting gas
[16:45] <SpeedEvil> not moving fast enough though
[16:46] <SpeedEvil> unless the zoom on that camera is huge - assuming that the gas is coming out at ~340m/s - then that puts it at ~120km if the sums I've done on the back of this cracker are accurate.
[16:46] <SpeedEvil> Assuming it's ~1/100th of a radian across - the size of the moon
[16:47] <SpeedEvil> I was wondering about a failed launchers second stage
[16:47] <Laurenceb> or... its fake
[16:47] <Laurenceb> FAKE
[16:47] <SpeedEvil> that too
[16:47] <SpeedEvil> projector -> fogbank
[16:47] Action: Laurenceb youtube mode
[16:47] <russss> lots of observers over a wide area apparently
[16:47] <Laurenceb> FAKE
[16:48] <Laurenceb> fogbank= tritium blown polythene foam?
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[16:48] <Laurenceb> that nuke component
[16:49] <russss> http://mayanprophecies.net/wp-content/uploads/2009/12/1.JPG
[16:49] Action: Laurenceb dons anorak
[16:51] <Laurenceb> Looks currently like another failed testÿ launch of the Russian Bulava submarine launched ballistic missile.
[16:51] <Laurenceb> There was an advisory for shipping in the white sea for a rocket launch
[16:52] <russss> I read that the russians claimed no launch had happened though
[16:52] <SpeedEvil> russss: shooped.
[16:52] <SpeedEvil> Laurenceb: where?
[16:52] <Laurenceb> comments
[16:52] <russss> and they are obliged to notify launches
[16:53] <SpeedEvil> ah
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[16:57] <Laurenceb> sounding rocket?
[16:58] <SpeedEvil> Dunno.
[16:58] <SpeedEvil> If it's real - it's got to be under a couple of meters or over 50km or so away - or gas doesn't do that.
[16:59] <SpeedEvil> probably more like over 80km away to get high enough
[16:59] <russss> yeah
[16:59] <russss> and if that's high, someone almost certainly got it on radar.
[16:59] <Randomskk> edmoore: ic7000 up and running
[17:00] <edmoore> Randomskk: cool
[17:00] <SpeedEvil> my other option was a large reentering propellant tank and the rest burned up a bit earlier
[17:00] <Randomskk> now I can listen to people on a repeater talking about the traffic?
[17:00] <SpeedEvil> woo! The excitement of amateur radio.
[17:02] <edmoore> Randomskk: the world is your oyster, yes
[17:02] <edmoore> GB3PY is the one
[17:02] <Randomskk> not sure if I am in range of it from here
[17:04] <Randomskk> the 2/70 antenna seems to be working fine at least
[17:05] <Randomskk> and I have programmed capital, absolute, radio 1, 2, 3 etc into its memory :p
[17:06] <edmoore> Randomskk: you're definitely in range of it
[17:07] <edmoore> it's 30W and it's in madingley
[17:07] <Randomskk> oh, okay
[17:07] <edmoore> you'll have to get it set up for repeater use
[17:07] <Randomskk> yea, done that for the two near here
[17:07] <edmoore> it's a bit fidly the first time round but basically is pretty easy
[17:07] <edmoore> need to set the CTCSS, shift and direction, and so on
[17:07] <Randomskk> yup
[17:08] <Randomskk> done for three of them, though it seems it doesn't actually store the shift
[17:08] <Randomskk> unless you have it store split operation rather than repeater +\-
[17:08] <Randomskk> one of the repeaters on 430 here is like 8.6mhz shift? rather than 1.6 for everyone else
[17:09] <edmoore> really? that's very very big
[17:09] <edmoore> almost bigger than the enttire amateur band
[17:10] <Randomskk> not hearing anything on gb3py atm
[17:10] <Randomskk> bear in mind I am in surrey now
[17:11] <edmoore> def got it? i.e. if you key into it do you get carrier for a few seconds afterwards?
[17:14] <Randomskk> pretty sure it's programmed right but not hearing anything, if I transmit briefly I still don't get anything back
[17:15] <Randomskk> going on their coverage map I'm nowhere near getting signal
[17:15] <edmoore> this is for GB3PY?
[17:15] <Randomskk> yea
[17:15] <edmoore> are you sure? it should be totally saturated here
[17:15] <Randomskk> it's in cambridge, I'm in surrey
[17:15] <edmoore> i can get it with my 5W handheld in our CUED lab
[17:15] <edmoore> oh!
[17:15] <edmoore> sorry
[17:15] <edmoore> ok
[17:15] <edmoore> no chance
[17:15] <Randomskk> :p
[17:16] <Randomskk> it is programmed in though
[17:16] <Randomskk> will pick it up next term
[17:16] <edmoore> i think james once tried to get it
[17:16] <edmoore> i reckon with a decent yagi and from my gf's balcony instratford, I might be able to get it
[17:16] <edmoore> maybe
[17:16] <Randomskk> with a big yagi pointing the right way, maybe, but with a half meter whip...
[17:16] <edmoore> although there are actually hills in the way, so maybe not
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[17:19] <Randomskk> powering the thing with a spare atx power supply
[17:19] <Randomskk> since it needs some silly amount of 12v
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[17:21] <Randomskk> this guy is seriously talking about his ailments
[17:21] <Randomskk> edmoore wasn't even exaggerating
[17:24] <edmoore> honestly, it's all they do
[17:26] <Randomskk> all that radio kit and spectrum... :p
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[17:31] <Laurenceb> lulz
[17:32] <Laurenceb> maybe they need a ham radio agony aunt
[17:34] <Randomskk> interestingly I am getting the repeater as S0
[17:35] <edmoore> try putting the antenna on something big and metalic and ideally plat
[17:35] <edmoore> flat*
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[17:36] <rjharrison> evening all
[17:36] <rjharrison> Hey edmoore
[17:37] <edmoore> hi rjharrison
[17:37] <rjharrison> Look like the wx is going to be getting better
[17:37] <rjharrison> The JS is finally moving away for a while
[17:38] <rjharrison> It's really upset the local weather this year. So mild
[17:38] <rjharrison> edmoore the pole has arrived
[17:38] <edmoore> http://www.srcf.ucam.org/~cuspaceflight/hourly-predictions/
[17:38] <edmoore> still not great for the next 5 days
[17:39] <rjharrison> edmoore hehe cool
[17:39] <rjharrison> I like that
[17:39] <Laurenceb> thats nice
[17:39] <Laurenceb> you were talking about that for so long, good you got it working
[17:39] <rjharrison> That will save a whole lot of poreccing time
[17:39] <edmoore> you want to be directing this at rjw57
[17:39] <rjharrison> processig
[17:40] <rjharrison> rjw57 nice one
[17:40] <Laurenceb> good work
[17:40] <rjharrison> who is rjw57
[17:40] <rjharrison> one of your new recruites edmoore
[17:40] <edmoore> he's in a lab about 10m down the corridor from me
[17:41] <rjharrison> Ohh so not an undergrad then
[17:42] <rjharrison> Right I have to dash will post some pole fun sometime when the sun is shining
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[17:43] <edmoore> have got to dash myself
[17:43] <edmoore> catch you all later
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[17:49] <Laurenceb> I was just lookng at the CC1020 performance
[17:49] <Laurenceb> if I've done this right, its almost identical to the best scanners
[17:49] <Laurenceb> - converting to uV sensitivity
[17:50] <Laurenceb> however you are of course limited to baud rate
[17:50] <Laurenceb> and Ive effectively included the coding gain as the performance figures are with FEC
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[17:56] <Laurenceb> you can effectively lower the throughput with extra FEC
[17:57] <Laurenceb> but theres a limit where the FLL and DLL can no longer track that data
[17:57] <Laurenceb> I think you could add a load of reed solomon packetization
[17:58] <Laurenceb> and get almost identical performance to 300 baud RTTY
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[18:22] <DanielRichman> So, here I am, choosing my callsign (Ofcom just got my Foundation license pass info). sbasuita chose M6SXB I believe, based on his initials. M6DXR but looks a bit cheesy due to the DX-er ness of it. Does M6DXR sound overly.... silly, and should I grab M6XDR or M6DRX?
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[18:30] <sbasuita> DanielRichman, i got m6sbx
[18:30] <DanielRichman> sbasuita: i think that settles it then, unless you think i should take the opportunity to declare myself a dxer
[18:32] <DanielRichman> sbasuita: did you check "Name and mailing address may be published in a call sign book?"
[18:32] <sbasuita> DanielRichman, I doubt it
[18:42] Nick change: DanielRichman -> M6DRX
[18:42] Nick change: M6DRX -> DanielRichman
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[19:11] <Randomskk> DanielRichman: nice one
[19:11] <Randomskk> do you have a radio?
[19:12] <DanielRichman> Randomskk, we are currently borrowing jcoxon's ft-790 but that's RX only since.
[19:12] <DanielRichman> that's for the project
[19:12] <DanielRichman> Randomskk, i'm seriously considering getting a ft-817
[19:13] <Randomskk> they are pretty neat, I played with one at cusf
[19:13] <Randomskk> tiny and battery powered which is handy
[19:14] <Randomskk> I currently have a computer power supply running to power this ic7000 :p
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[19:17] <DanielRichman> Randomskk, very nice
[19:20] <jcoxon> evening all
[19:20] <DanielRichman> hello
[19:21] <DanielRichman> jcoxon, rjh said you thought the weather this weekend was going to be good?
[19:21] <Randomskk> DanielRichman: are you guys going to be launching in surrey eventually, or elsewhere?
[19:22] <DanielRichman> Randomskk, cambridge
[19:22] <DanielRichman> be back laters
[19:22] <Randomskk> I wonder if I can hear balloons in cambridge from down here
[19:22] <Randomskk> probably not
[19:24] <SpeedEvil> how far are you?
[19:24] <SpeedEvil> IIRC ~400km is plausible
[19:24] <SpeedEvil> you won't hear them at anything other than peak altitude though
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[19:32] <edmoore> rjharrison_: hi
[19:38] <jcoxon> hey edmoore
[19:38] <edmoore> hi jcoxon
[19:38] Action: jcoxon has finally handed in his last bit of work till christmas
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[19:38] <edmoore> cool
[19:38] <jcoxon> apart from a 5min presentation tomorrow
[19:38] <edmoore> same for me today
[19:39] <jcoxon> it was a load of rubbish :-p
[19:39] <edmoore> :)
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[19:42] <jcoxon> hehe i had a thought - we could get the first continental cross with a balloon by launch from gibralter to morocco :-p
[19:44] <RocketBoy> hehe
[19:45] <RocketBoy> easy
[19:46] <edmoore> cunning
[19:47] <edmoore> probably done by some alaskan's already
[19:50] <RocketBoy> europe asia would be the simplest - just need to throw it
[19:51] <jcoxon> hehe i've crossed that line
[19:51] <jcoxon> tis in russia still be red tape :-p
[19:55] <RocketBoy> I guess it depends on what you call a continents
[19:56] <jcoxon> yeah
[19:56] <jcoxon> right - time to finish this damn payload
[19:56] <jcoxon> just need to fix i2c
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[20:03] <ssapphiree> hey guys
[20:05] <ssapphiree> I've got a question... I've noticed on the high altitude balloons' videos that above ~20 km the camera doesn't swing and spin much
[20:05] <edmoore> uhuh
[20:05] <ssapphiree> like it does on lower altitudes
[20:05] <edmoore> uhuh
[20:06] <ssapphiree> so there are no strong winds up there, right?
[20:06] <edmoore> generally not so much, althought no always
[20:06] <edmoore> there's certainly less shear
[20:06] <jcoxon> would it also be that there is less air density therefore less effect on the payload
[20:07] <edmoore> I guess, though if it's being driven at it's natural freq, you don't need much input
[20:08] <edmoore> there's lessdamping too
[20:08] <jcoxon> ssapphiree, the fastest winds are around 10-13km
[20:08] <ssapphiree> oh
[20:08] <jcoxon> once you are clear of there it generally settles down
[20:08] <ssapphiree> I see
[20:08] <jcoxon> thats the jetstream
[20:09] <ssapphiree> I was just thinking about some stabilizing system that would allow to make nice photos and video
[20:10] <edmoore> the jetstream can be very unkind to balloons
[20:10] <edmoore> http://vimeo.com/1598522
[20:10] <ssapphiree> but if the payload doesn't spin much at high altitudes then maybe it's unnecessary
[20:10] <edmoore> ssapphiree: i have an interest in stablising systems
[20:11] <jcoxon> i quite like the gentle spin that the payload gets at highalt
[20:11] <jcoxon> very space like :-)
[20:11] <ssapphiree> heh
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[20:13] <ssapphiree> stabilizing system would be also useful for making some solar arrays powering
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[20:14] <ssapphiree> and also I was thinking about maybe-sometimes-could-be-made-system with a very long term balloon travelling the Earth's stratosphere and communicating through satellite internet
[20:15] <edmoore> Nasa do that kind of thing
[20:15] <ssapphiree> so stabilizer would keep the direction to the satellite
[20:15] <edmoore> several weeks at 35km, sat comms
[20:15] <ssapphiree> and to the sun for solar arrays
[20:15] <ssapphiree> really?
[20:15] <edmoore> yes.
[20:15] <ssapphiree> frack... they're always one jump ahead
[20:15] <ssapphiree> :D
[20:16] <edmoore> BSG fans always have telltale signs
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[20:16] Action: jcoxon loves BSG
[20:16] <jcoxon> tis sad
[20:16] <ssapphiree> :))
[20:16] <ssapphiree> yeah
[20:16] <ssapphiree> BSG is great
[20:16] <edmoore> better than the wire
[20:17] <jcoxon> oh yes
[20:20] <ssapphiree> but can a usual balloon survive for so long time?
[20:20] <edmoore> not a latex balloon
[20:21] <ssapphiree> actually I was also thinking about more than several weeks... several month perhaps :)
[20:21] <ssapphiree> though this is all not for my first launch of course :D
[20:21] <edmoore> you have to used fixed envelopes for the long duration stuff - zero pressure or super pressure balloons
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[20:21] Possible future nick collision: KingJ
[20:21] <ssapphiree> oh
[20:21] <ssapphiree> I see
[20:21] <edmoore> if you want a month, you're definitely into super-pressure territory
[20:22] <jcoxon> of zp in antarctica or arctic
[20:23] <russss> Phil Plait thinks that norwegian thing was a rocket http://blogs.discovermagazine.com/badastronomy/2009/12/09/awesomely-bizarre-light-show-freaks-out-norway/
[20:25] <jcoxon> its rather spectacular
[20:29] <jcoxon> Randomskk, what repeater are you getting?
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[20:34] <Randomskk> jcoxon: GB3GF
[20:35] <Randomskk> not much on it atm except someone apparently doing cw on fm
[20:40] <jcoxon> hmmm my repeater is GB3LK
[20:50] <edmoore> do they talk about catheters and piles on GB3LK?
[20:50] <jcoxon> mainly traffic
[20:50] <jcoxon> which is usually M25 related
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[20:58] <Randomskk> plenty of traffic here with the odd bit of blood pressure, collapsing, cholesterol level, etc
[20:58] <Randomskk> nothing atm though
[20:58] <jcoxon> sounds like a normal day for me working in the GPs
[20:59] <Randomskk> 'p
[20:59] <Randomskk> :p even
[21:16] <jcoxon> ping natrium42
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[21:37] <ssapphiree> wow, natrium42
[21:37] <ssapphiree> it's that guy whos balloon video I've seen
[21:37] <ssapphiree> and on that page I've found this channel name :D
[21:38] <ssapphiree> and there was a surprise for me to hear russian speech in a video on an american website :D
[21:39] <jcoxon> canadian :-p
[21:39] <jcoxon> yes thats probably him
[21:39] <ssapphiree> oh, canadian :)
[21:42] <jcoxon> ssapphiree, where are you based?
[21:42] <ssapphiree> Moscow :)
[21:43] <jcoxon> wow, thats a first :-)
[21:43] <jcoxon> mainly UK on here
[21:43] <ssapphiree> wow, UK?
[21:43] <ssapphiree> I love UK :D
[21:44] <ssapphiree> I've been to England when I was 7 and 8
[21:44] <ssapphiree> or 6 and 7, can't remember exactly :))
[21:44] <ssapphiree> two times
[21:44] <jcoxon> :-)
[21:45] <jcoxon> i went to moscow 2 years ago
[21:45] <jcoxon> came in on the train from warsaw and stayed a few days and then go the trans-siberian over to ulan-ude and then mongolia
[21:48] <ssapphiree> wow cool
[21:48] <ssapphiree> and where do you live?
[21:50] <ssapphiree> hah, at that news article about Norway thing(link above), the author is definitely a fan of BSG too :D
[21:50] <ssapphiree> My first reaction when I saw that was, "What the FRAK is THAT?!"
[21:50] <ssapphiree> ))
[21:50] <jcoxon> I live in London
[21:51] <SpeedEvil> russss: yeah - I was speculating that on another channel
[21:51] <jcoxon> so what sort of payload are you planning?
[21:51] <SpeedEvil> russss: if those are gas jets - it has to be at ~1m range or under, or ~120km - or gas doesn't work like that
[21:52] <russss> yeah, I saw you talking about it earlier - it was this channel :)
[21:52] <ssapphiree> well I think at my first launch I should just make it simple: a camera, a gps and some communication
[21:52] <SpeedEvil> oh - here
[21:52] Action: SpeedEvil was confused.
[21:53] Action: SpeedEvil is confused.
[21:53] <ssapphiree> and for further launches I'm thinking of trying solar batteries
[21:54] <ssapphiree> they must be inside a payload during lifting to be safe from those crazy winds and temperature, and at the stratosphere they should come out
[21:54] <ssapphiree> that's the interesting thing for me ))
[21:55] <SpeedEvil> Unless you're using floaters, there proably isn't much point
[21:55] <ssapphiree> what's floaters?
[21:56] <ssapphiree> actually, what I'm afraid of for now, is that my balloon can travel quite far and fall into some deep forest or a swamp and I won't find it
[21:57] <jcoxon> floaters are when we make latex balloons maintain a floating altitude for a bit of time
[21:57] <ssapphiree> or worse: land in the city (Moscow is close) and I will not find it if I come two minutes late
[21:57] <jcoxon> e.g 7 hours
[21:57] <ssapphiree> because someone else will take it :D
[21:57] <ssapphiree> oh I see
[21:57] <ssapphiree> yeah, of course I mean that application for solar batteries
[21:58] <jcoxon> hehe to pull off a floater at present requires you to launch just before it gets dark ;-p
[21:59] <ssapphiree> I would just test it at first, because if something goes wrong, I would better know it before I launch my precious payload for 7 hours and it will travel hundreds of kilometers :D
[21:59] <jcoxon> ssapphiree, http://www.pegasushabproject.org.uk/wiki/doku.php/missions:ballasthalo#flight_2
[21:59] <jcoxon> 10hr flight with 7hrs at 27km altitude
[22:02] <ssapphiree> omg
[22:02] <ssapphiree> it really travelled far
[22:02] <ssapphiree> that's why I'm afraid of launching a balloon at all :))
[22:03] <ssapphiree> how am I gonna find it if it goes, say, 100 km... it's damn Russia :)))
[22:03] <sbasuita> ssapphiree, yes, but you've got the whole of mainland russia for your balloon to wander across - no chance of a splash ;)
[22:03] <jcoxon> ssapphiree, hehe that floated on purpose
[22:03] <jcoxon> the best thing to do is be careful when you launch
[22:03] <jcoxon> use flight predictors
[22:03] <jcoxon> e.g. http://www.srcf.ucam.org/~cuspaceflight/predict/index.php
[22:04] <ssapphiree> flight predictors know the winds up there?
[22:04] <jcoxon> yup
[22:04] <ssapphiree> that's good :))
[22:08] <ssapphiree> oh my god
[22:08] <ssapphiree> if I launch it tomorrow morning
[22:08] <ssapphiree> it will travel 100 km
[22:08] <ssapphiree> behind the other side of Moscow
[22:08] <ssapphiree> >_<
[22:08] <SpeedEvil> 100km is a short distance
[22:09] <SpeedEvil> you pretty much need to plan on driving at least that
[22:09] <ssapphiree> really? I was hoping it's about 10-20 km normally
[22:09] <SpeedEvil> Consider how high it's going up
[22:09] <SpeedEvil> it's going up 25km or so.
[22:09] <ssapphiree> yeah, I know... :))
[22:09] <SpeedEvil> At 5m/s or so
[22:10] <SpeedEvil> with a 10m/s wind over that time, that's 200km or so crossrange
[22:10] <SpeedEvil> err - 100km/
[22:10] <ssapphiree> but that means I'll lose the radio signal
[22:10] Action: SpeedEvil can't multiply
[22:11] <SpeedEvil> 10mW@433MHz has worked for us
[22:11] <SpeedEvil> up to ~500km or more
[22:11] <ssapphiree> uh? I just saw that natrium42's radio modem is for 64 km range
[22:11] <ssapphiree> so I thought the usual range is about that
[22:11] <SpeedEvil> not radio modems
[22:12] <SpeedEvil> http://ukhas.org.uk/guides:tracking_guide
[22:12] <SpeedEvil> see
[22:13] <MikeMc> evening all
[22:14] <ssapphiree> hm I see
[22:14] <ssapphiree> good evening MikeMc
[22:15] <ssapphiree> they appear quite expensive though
[22:15] <ssapphiree> maybe it's better to make a logging system and use a cell phone... so when it lands it will send me a message where it is
[22:16] <ssapphiree> and I'll pray god that it hasn't been seen by humans
[22:17] <ssapphiree> because they would definitely steal it :D
[22:23] <ssapphiree> hm, though...
[22:23] <ssapphiree> it's gonna go for about 2:30
[22:23] <ssapphiree> in that time I can get to the landing site
[22:23] <ssapphiree> even without a car
[22:23] <ssapphiree> though a car would be very nice to use...
[22:24] <ssapphiree> I think I should involve some driving friend :D
[22:24] <MikeMc> you in the UK ?
[22:24] <ssapphiree> no, I'm almost in Moscow
[22:26] <sbasuita> ssapphiree, the project i'm doing involves a cell phone with sms as well as the radio transmitter
[22:26] <sbasuita> ssapphiree, the issue is that gsm signals won't go higher than a few km, and you might not get lock on the way down. It's a bit of a risk.
[22:32] <ssapphiree> as I've tested during an airplane flight, GSM stops working above 1 km or so :(
[22:33] <jcoxon> hehe i wrote in this elaborate watchdog code to make sure that my i2c doesn't crash if the wire disconnects but its just scewed up the comms now
[22:33] <jcoxon> time to roll back
[22:33] <ssapphiree> yeah, it's a bit of a risk
[22:33] <ssapphiree> I'm thinking of some reliable system that would SURELY connect to GSM once in the range
[22:34] <ssapphiree> and I will first test it before launching
[22:34] <ssapphiree> for example putting it inside a fridge
[22:34] <ssapphiree> for a while
[22:35] <ssapphiree> and then getting it out of there and smashing the floor
[22:35] <ssapphiree> simulating a bad landing :D
[22:35] <ssapphiree> if connects after that, then it's gonna work at the mission
[22:37] <ssapphiree> oh I also have an idea about a floating balloon! if it travels too far, say, 500 km, then I'm gonna just ask a friend from a town nearby to find the balloon!
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[22:42] <Randomskk> :( I can't find any data signals to try and decode
[22:42] <Randomskk> I guess getting an HF antenna would get me more signals to look at
[22:45] <Randomskk> or just mounting this one better
[22:45] <jcoxon> i found a long bit of wire and some ground wires works well
[22:46] <Randomskk> yea, that'd probably work as well as anything. I did try with a really long bit of wire but it didn't actually pick anything up
[22:46] <jcoxon> need ground wires
[22:46] <jcoxon> i have a long wire over my roof and then ground wires
[22:46] <jcoxon> can pick up stations in the US and Russia
[22:47] <Randomskk> wow, okay.
[22:47] <Randomskk> ground wires it is
[22:47] <Randomskk> to the sheath of the antenna socket or to the radio's gnd terminal?
[22:48] <jcoxon> i went to antenna socket
[22:48] <jcoxon> if you want i'll find some stations for you
[22:48] <Randomskk> guess I'll just get one of those pl plugs and solder some wires
[22:48] <Randomskk> how did you get a wire over the roof? :P
[22:48] <Randomskk> actually, I guess that woudln't be too bad
[22:49] <Randomskk> tennis ball and lob it over or something
[22:49] <jcoxon> yeah
[22:49] <jcoxon> i'm on the top floor and i have a small balcony
[22:49] <Randomskk> I guess the long wire isn't so great for transmitting due to not being matched?
[22:49] <jcoxon> oh i don't transmit
[22:49] <Randomskk> yea, fair enough then
[22:50] <Randomskk> will give that a go
[22:50] <Randomskk> and probably try making a 70cm band yagi for balloon tracking at some point
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