highaltitude.log.20130712

[00:04] <arko> Geoff-G8DHE: are you looking for it?
[00:04] <Geoff-G8DHE> Humm taking longer to come back this time its always been 4 minutes before
[00:04] <arko> oh wait it's night
[00:04] <Geoff-G8DHE> ah a burst and then stpped again
[00:04] <Geoff-G8DHE> its night yes no chance 01:00 in the morning
[00:04] <fsphil> ah cool, another float
[00:05] <Geoff-G8DHE> by now it should be just off the Coast
[00:05] <Geoff-G8DHE> 18 minutes now since last saw a record but it ah its there but all over the place
[00:05] <Ferran> so long time without any data, for sure.
[00:06] <Geoff-G8DHE> yes the battery seems to have gone like last time in a
[00:06] <Geoff-G8DHE> spread of freq.
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[00:06] <fsphil> ack
[00:06] <Geoff-G8DHE> but last time it died at just on a volt I thought
[00:07] <Geoff-G8DHE> Can still see something but its spread out all over the channel
[00:08] <Ferran> going to Paris..
[00:08] <Geoff-G8DHE> But it might recover come dawn as it has a solar panel on board ....
[00:09] <Geoff-G8DHE> hangon I can here it again and see it its
[00:09] <Geoff-G8DHE> on again
[00:09] <Geoff-G8DHE> but no decode
[00:11] <Geoff-G8DHE> right I shall leave it at that if it comes back on it might be close enough to the original freq. to start copy again!
[00:11] <Geoff-G8DHE> night all
[00:13] <fsphil> nite!
[00:13] <Ferran> nite
[00:17] <Geoff-G8DHE> Ah its back! full strength again
[00:17] <Ferran> its alive ¡
[00:18] <mfa298> if only it was called Gordon
[00:18] <Geoff-G8DHE> passed over 300m from me!
[00:18] <Ferran> so near Geoff-G8DHE
[00:19] <Geoff-G8DHE> Right I shall make it out the shack this time gnight again!
[00:20] <mfa298> Geoff-G8DHE: you need to get remote control working, then you can operate it all from elsewhere.
[00:20] <Ferran> more data
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[00:49] <mfa298> from what I think I'm seeing it looks like I get the information stream but no telemetry
[00:52] <mfa298> the errors in the text scrolling along the status bat seem to change each time
[00:54] Action: mfa298 should probably stop listening for dominoex and sleep
[00:57] <SpeedEvil> If you're seeing status bats, then yes, you need sleep.
[00:58] <joeman> Geoff:Casa also charge atleast 460 dollars to process hab application
[01:00] <SpeedEvil> Ow.
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[01:00] <joeman> yes
[01:02] <Darkside> mm
[01:02] <Darkside> we did that long ago...
[01:03] <Darkside> joeman: you dont really need a cutdown to abite by casa regs
[01:03] <Darkside> only medium class balloons need that
[01:04] <Darkside> and most balloons us hobbyists launch will be 'kind of' in the light class
[01:04] <Darkside> the balloon diameter is the only odd part about the light class
[01:04] <Darkside> its like CASA didn't actually realise that a balloon will expand as it rises..
[01:04] <joeman> mmmm oh ok. mine will exceed 2 m
[01:04] <Darkside> yeah that ruling is a bit odd
[01:04] <Darkside> you may want to talk to casa and mphasise the weight
[01:05] <Darkside> that should be more important than balloon diameter
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[01:05] <joeman> yes. ok.
[01:05] <Darkside> where are you launching from?
[01:05] <Darkside> or hoping to launch from
[01:05] <joeman> fnq
[01:05] <Darkside> eh
[01:06] <Darkside> oh
[01:06] <Darkside> far north queensland
[01:06] <joeman> perhaps west of mareba far north que
[01:06] <joeman> yep
[01:06] <Darkside> make sure the flight path doesn't go too far east!
[01:06] <Darkside> you dont have as much of a runway as we do down here
[01:07] <joeman> yes. really far inland im thinking
[01:07] <Darkside> yup
[01:07] <Darkside> that'll be the best bet
[01:09] <joeman> drove to musgrave station a few days ago and was hopimg to go past kimba
[01:09] <joeman> kimba was where some ppl launched balloon during eclipse
[01:12] <Darkside> ok
[01:24] <Ferran> night all
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[02:23] <DL7AD> good evening
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[02:24] <DL7AD> i wrote a mail to a friend in france who recently tried to track PIE5 before.
[02:25] <craag_> Great
[02:26] <craag_> This one has solar, so will have at least another day of life!
[02:26] <craag_> *should (fingers crossed)
[02:26] Nick change: heathkid|2 -> heathkid
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[02:53] <DL7AD> does the ballon transmit any data or is there a failure?
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[03:14] <KT5TK> New position
[03:14] <DL7AD> saw it
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[03:28] <arko> looks like Leo's hab is about to get some sunlight soon
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[03:35] <arko> hope france wakes up soon
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[03:39] Nick change: mazzanet_ -> mazzanet
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[04:03] <heathkid> doesn't everyone?
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[04:03] <heathkid> ooops... wrong channel...
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[04:08] <EduardoGuizaMx> Hello. I'm new here
[04:08] <EduardoGuizaMx> Do you know if there is a problem with the landing predictor?
[04:09] <EduardoGuizaMx> Hellooooo!! is anybody here?
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[04:11] <Darkside> EduardoGuizaMx: its being worked on
[04:11] <Darkside> EduardoGuizaMx: try using this: http://predict.habhub.org/
[04:12] <EduardoGuizaMx> I try the entire day and do not work
[04:12] <Darkside> try the link i just posted
[04:12] <Darkside> its not the same one as is linked from the habhub.org site
[04:14] <EduardoGuizaMx> the link you just post me works fine!!!
[04:14] <Darkside> yes
[04:14] <Darkside> as it should
[04:14] <EduardoGuizaMx> thank you very much, Darkside!!!
[04:14] <EduardoGuizaMx> What happen to the other page?
[04:15] <Darkside> the old one pulls data from NOAA's servers
[04:15] <Darkside> which are screwed at the moment
[04:19] <arko> ah crap
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[05:25] <number10> was some strange noise at about 2am LeoBodnar
[05:27] <LeoBodnar> Morning!
[05:27] <LeoBodnar> number10: outage of some sort?
[05:28] <number10> I could see the signal from b5 but there was interference right across it
[05:28] <number10> no one else seemd to be uploading either
[05:28] <number10> sower time and work :(
[05:28] <number10> +h
[05:30] <LeoBodnar> There were some very sharp drops in battery voltage from OKish 1.35 down to 1.30 associated with signal dropouts and then gentle Vbatt recovery. It looks like a short circuit of some sort onboard.
[05:30] <LeoBodnar> thanks number10 !
[05:36] <DL7AD> i've a friend on the line whos living in france to receive the balloon. hes living near by paris
[05:36] <x-f_> he just appeared on the map, i think
[05:36] Nick change: x-f_ -> x-f
[05:37] <x-f> F5VMH?
[05:37] <DL7AD> yes
[05:42] <LeoBodnar> Great work DL7AD! Thanks for your help!
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[05:49] Nick change: number10 -> number10_
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[05:52] <jcoxon> ooo its still going
[05:54] <x-f> French defence line is weak this morning :)
[05:55] <jcoxon> well we are going to need some listeners in france
[05:57] <DL7AD> we have some trouble configuring. but we are going to find out the reason. but he is receiving the balloon very strong
[05:57] <LeoBodnar> Have you seen the pressure diverge jcoxon ? LIke in a book.
[05:57] <LeoBodnar> Great DL7AD, what is the config problem?
[05:57] <jcoxon> LeoBodnar, there are books on this?
[05:58] <jcoxon> :-)
[05:58] <DL7AD> we cant decode any signal
[05:58] <DL7AD> he wants to send me a screenshot now via email
[05:58] <LeoBodnar> Oh, I have assumed you have started one already?! XD
[05:58] <DL7AD> i will post it here on chat
[05:58] <LeoBodnar> DL7AD: Decoding mode is called DominoEX 16
[05:59] <LeoBodnar> It needs to be USB or click "RV" if you are on LSB
[05:59] <DL7AD> i have him now on the phone
[06:01] <jcoxon> hats off to you LeoBodnar
[06:01] <jcoxon> you've done more in this month then i've done all year
[06:01] Action: jcoxon is a little bit jealous
[06:01] <jcoxon> :-D
[06:02] <x-f> here's the pressure graph this far - http://i.imgur.com/tYHVtYV.png
[06:02] <LeoBodnar> Thanks jcoxon, really appreciate this :) Aren't we working for the same purpose together?
[06:02] <jcoxon> LeoBodnar, of course
[06:02] <jcoxon> x-f, cool
[06:03] <x-f> and temperatures - http://i.imgur.com/kweNQoT.png
[06:03] <jcoxon> okay so looking at hte pressure graph
[06:04] <LeoBodnar> Balloon bursts at about 7kPa differential so we are safe until then. Temperatures seem to need adjustment. During the nighttime they should have stayed the same?
[06:04] <LeoBodnar> I.e. temperature_Balloon = temperature_external
[06:04] <jcoxon> LeoBodnar, but the balloon is under pressure so temp would be different?
[06:04] <x-f> (time isn't correct, you have to add 3 hours)
[06:05] <jcoxon> from that graph balloon is cooler
[06:05] <LeoBodnar> Only after rapid change in condition, i.e. quick ascend/descen, otherwise it will come to thermal equilibrium
[06:05] <jcoxon> yay for f5vmh
[06:05] <jcoxon> you've got tracking for a good few more hours
[06:06] <LeoBodnar> Well done DL7AD and F5VMH! :)
[06:07] <Upu> morning all
[06:07] <Upu> nice Leo
[06:07] <jcoxon> okay so the simple things are that we can see that sunrise obviously makes a different
[06:07] <LeoBodnar> morning Upu
[06:07] <x-f> morning
[06:07] <jcoxon> so temp goes up
[06:07] <jcoxon> and pressure slightly rises
[06:07] <jcoxon> (while external has gone down)
[06:08] <LeoBodnar> Yes, and if it exceeds 7kPa then either burst or leak
[06:08] <jcoxon> but if you look at the graph its now started to reduce a little
[06:08] <LeoBodnar> In theory knowing the pressure and temperature one can deduce the volume of the gas
[06:09] <jcoxon> what will be interesting now is whether it settles down again for float
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[06:09] <LeoBodnar> External pressure goes down since it has risen into a thinner air
[06:09] <Upu> awesome
[06:09] <jcoxon> and how different the pressures are then
[06:09] <LeoBodnar> But why - I don't know. The only explanation is that nylon has stretched further
[06:10] <LeoBodnar> SOlar panel seems to work Upu :)
[06:10] <jcoxon> LeoBodnar, how is the panel adding to power?
[06:10] <jcoxon> diode network or FET?
[06:10] <Upu> indeed
[06:10] <LeoBodnar> There were some major sharp drops of Vbatt Upu associated with signal shifts. I think they are short circuits of some kind.
[06:11] <LeoBodnar> Is ballon aluminised on the inside or laminated?
[06:11] <Upu> sensor shorting ?
[06:11] <LeoBodnar> balloon
[06:11] <LeoBodnar> Internal sensor has no isolation around it
[06:11] <LeoBodnar> ]But it did not malfunction so maybe it wasn't that
[06:12] <LeoBodnar> diode network jcoxon - very simple and quick
[06:12] <LeoBodnar> Directly onto main bus, bypassing step-up
[06:13] <Upu> well lets keep fingers crossed it remains in range
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[06:13] <rharrison_> morning all
[06:14] <x-f> morning
[06:14] <LeoBodnar> It's either choppy air or GPS problems again.
[06:14] <rharrison_> Anyone around who can update the wind data on the new predictor?
[06:14] <x-f> LeoBodnar, what does the "system status" mean?
[06:14] <LeoBodnar> GPS ducky ftw!
[06:16] <LeoBodnar> S= power save mode, P=max performance mode, anything else is type of failiure
[06:16] <jcoxon> LeoBodnar, good luck with the flight
[06:16] <jcoxon> i'm away for the weekend
[06:16] <jcoxon> will catch up next week
[06:16] <daveake> Morning rharrison_ isn't it using the set from midnight last like? Looks like it
[06:16] <jcoxon> as i said - very cool
[06:16] <LeoBodnar> Thanks jcoxon have a good one!
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[06:20] <Upu> hey rharrison_ I'll do it shortly
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[06:20] <LeoBodnar> Upu: internal temperature has risen to +15C. Something is up. Is there some sort of fire or warming up on board?
[06:20] <Upu> lol some sort of fire :)
[06:20] <Upu> well its either solar
[06:20] <Upu> diodes ?
[06:20] <daveake> Is there some sort of bnright yellow object in the sky?
[06:20] <rharrison_> Great Upu not sure if we want to launch atm as in both aproaches for LB and manch
[06:20] <LeoBodnar> B-4 stayed at -5C throughout the day
[06:20] <Upu> sun up diodeas working ?
[06:21] <Upu> have you run a prediction this morning ?
[06:21] <rharrison_> +15 is ok we have had +29C before
[06:21] <LeoBodnar> but 20C extra? Unbelievebale
[06:21] <Upu> its got to dump that eergy somewere
[06:21] <rharrison_> With a camera on board
[06:21] <daveake> I think I beat +29C on one flight ....:p
[06:21] <Upu> haha daveake's Pi melted :)
[06:21] <Upu> 16'C :)
[06:21] <LeoBodnar> Main Bus B is 2.0V bang on
[06:22] <daveake> smell of melting foam in that one
[06:22] <daveake> LeoBodnar did you stir the O2 tanks?
[06:22] <LeoBodnar> Morning daveake
[06:22] <daveake> morn another great flight there!
[06:22] <x-f> we had +42 last Saturday..
[06:22] <LeoBodnar> Yep, could you hear it?
[06:23] <daveake> With a scanner and a wet piece of string
[06:23] <daveake> Sorry had to stop tracking last night as I have a tracker to test for tomorrow
[06:23] <LeoBodnar> I meant me flipping the fan switch
[06:23] <daveake> haha
[06:24] <daveake> Yeah it got within 5 miles of here
[06:24] <daveake> Not as good as your previous attempt
[06:24] <LeoBodnar> B-series and daveakecentric
[06:24] <LeoBodnar> is
[06:25] <daveake> Well it was impressive that it followed me across the country!
[06:25] <LeoBodnar> It's just a party balloon, designed for good time
[06:27] <eroomde> heroic tracking efforts from the south coast crew
[06:28] <LeoBodnar> Yes, last line of defence! XD
[06:28] <LeoBodnar> Or is it first?
[06:28] <eroomde> not quite the white cliffs of dover
[06:28] <eroomde> the severn sisters of sussex
[06:28] <eroomde> seven*
[06:29] <LeoBodnar> Pressure diff is 4kPa now
[06:29] <LeoBodnar> We are good until 7kPa
[06:29] <eroomde> does it coincide with the alt increase near dawn?
[06:30] <LeoBodnar> yes, very well
[06:30] <LeoBodnar> from x-f : http://i.imgur.com/tYHVtYV.png
[06:30] <eroomde> nice
[06:30] <LeoBodnar> Time needs +3hours
[06:30] <eroomde> yep
[06:31] <LeoBodnar> You can also see it caught some setting Sun at the end of ascent yesterday
[06:31] <x-f> the graphs are here - http://x-f.lv/dev/habitat-graphs/payload/ea52013dc3168259655fb8491ecf1542
[06:31] <x-f> launch time: 2013-07-11 18:00
[06:32] <LeoBodnar> Wow, geek's Christmas!
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[06:38] <eroomde> sirens going off, ground starts to shake
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[06:38] <eroomde> no not the terminator, but the huge pile driving machine making a new weir for the thames at the bottom of the garden. not the idyllic morning i was hoping for
[06:41] <arko> LeoBodnar: hab is lookin good dude :)
[06:41] <daveake> Go and complain, eroomde, weir behind you
[06:42] <eroomde> if that's a pun it went over my head
[06:42] <gonzo__> you'll get in deep water with that dave
[06:43] <eroomde> oh i just got it
[06:43] <daveake> tick tick
[06:43] <eroomde> (haven't had coffee yet)
[06:43] <daveake> best fix that then
[06:43] <eroomde> tho i did spill the coffe i just ground on the floor
[06:43] <eroomde> and then made a sort of drug-addict's moan
[06:43] <arko> haha
[06:44] <arko> as long as you didnt bust out a razor blade and try to collect it back
[06:44] <LeoBodnar> XD arko
[06:44] <LeoBodnar> OK, work run!
[06:44] <arko> do you sleep?
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[06:45] <arko> HES GONE
[06:45] <gonzo__> that would make it freshly dround cofee?
[06:45] <eroomde> ho
[06:45] <arko> OMG
[06:45] <arko> wow
[06:45] Action: arko high fives gonzo__
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[06:45] <eroomde> do you think news of B-5 has reached the french press?
[06:45] <gonzo__> I feel a crooked stick coming from stage left
[06:46] Action: daveake checks for news of white flags
[06:46] <arko> lol
[06:46] <gonzo__> it's not a french project so they will ignore it
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[06:47] <arko> im sure the news organizations filter
[06:48] <eroomde> it lets them find the good stories more esspresso...ly
[06:48] <eroomde> (i still haven't had one yet)
[06:48] <daveake> You for coffee then come back :)
[06:48] <eroomde> i'll maybe get one from the really posh coffee place on the river
[06:49] <eroomde> well it's a mix of posh and yokel
[06:49] <gonzo__> don't stir, dave
[06:49] <eroomde> farmers or london commuters
[06:49] <eroomde> cap or chinos
[06:49] <arko> you may want to hurry to work eroomde, you dont want to be latte
[06:49] <daveake> He'll be there in an instant
[06:50] <eroomde> someone brought instant to work as a present
[06:50] <eroomde> 'because i know you like coffee'
[06:50] <arko> ...
[06:50] <daveake> lol
[06:50] <eroomde> tried to feign thankfullness
[06:50] <arko> did you kindly ask them to leave?
[06:50] <eroomde> made sure to carefully put it down next to the bean roaster
[06:50] <daveake> I hate coffee and even I know that's bad
[06:50] <gonzo__> best go now, or you will be latte
[06:50] <eroomde> 06:49 < arko> you may want to hurry to work eroomde, you dont want to be latte
[06:51] <daveake> beat me to it :)
[06:51] <eroomde> here's a sword
[06:51] Action: arko dances
[06:51] Action: arko just arrived from a whiskey bar
[06:51] homewld (518183ef@gateway/web/freenode/ip.81.129.131.239) joined #highaltitude.
[06:52] <gonzo__> snap. Do I get the cards now?
[06:53] <arko> http://i.imgur.com/XLQIsnH.gif
[06:53] <arko> brilliant
[06:53] <DL7AD> okay. first step is done with receiving the balloon in france. is there anybody else?
[06:54] <gonzo__> B-5 is almost lost in the noise, but still geting snatches of decode. Just never enough for a packet.
[06:54] <gonzo__> It's a nice mode
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[06:55] <eroomde> it's very a la mode
[06:58] <DL7AD> http://i.imgur.com/FfMMIjj.png
[06:59] <Upu> I tried all the French global tuners this morning
[06:59] <Upu> nothing
[06:59] <arko> très agréable
[07:00] <Upu> ICARUS isnt' flying today
[07:00] <daveake> ah shame
[07:00] <daveake> poor predictions?
[07:00] <Upu> yeah
[07:00] <eroomde> The Icarus of yesteryears?
[07:00] <Upu> the same
[07:01] <Upu> bit close to Manchester
[07:01] <eroomde> what brought that on?
[07:01] <Upu> I hear they have an airport there too
[07:01] <Upu> its that school he has launched with before
[07:01] <Upu> in Boston Spa
[07:01] <eroomde> ah righty
[07:07] <Geoff-G8DHE> http://360.g8dhe.net/hab_flights/B-5/index.php?ind=0 upto date again!
[07:11] LeoBodnar (51932a7b@gateway/web/freenode/ip.81.147.42.123) joined #highaltitude.
[07:12] <Geoff-G8DHE> Morning LeoBodnar
[07:12] <LeoBodnar> Morning Geoff-G8DHE, good fun last night!
[07:12] <LeoBodnar> Cheers for tracking it !
[07:14] <Geoff-G8DHE> Cracking it past over 300m to the side of my aerials!
[07:14] <Geoff-G8DHE> at which point it dropped out for 18 minutes :-(
[07:14] <Geoff-G8DHE> and then returned almost full strength :-)
[07:15] <arko> LeoBodnar: does the initial pressure data follow what you guessed?
[07:15] <Geoff-G8DHE> Like the graphs that x-f has developed!
[07:15] <x-f> cheers :)
[07:17] <Geoff-G8DHE> still see B-5 but only partial decodes at present
[07:17] <LeoBodnar> arko: Yes, it's exactly what I would have expeceted but we never knew how big the pressure diff rises due to the Sun heating
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[07:18] <LeoBodnar> Geoff-G8DHE: I think there were some voltage dips around the time it disappeared. No idea what have caused them but they must have caused the dropout. I am pleased it has recovered!
[07:19] <LeoBodnar> Geoff-G8DHE: you are almost below the horizon for it now?
[07:20] <Geoff-G8DHE> Probably its indicating so in the Elevation field!
[07:20] <arko> it seems as though at night it was equal, and when the sun came up it's about 40mbar difference?
[07:20] <arko> the unit is 10times mbar?
[07:20] <Geoff-G8DHE> but I do have a clear takeoff South being only mile or so from coast
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[07:25] <LeoBodnar> yes arko 1kPa
[07:25] <arko> very cool
[07:25] <LeoBodnar> or 10mbar
[07:26] <arko> hmm, interesting how the pressure is equal at night
[07:26] <arko> while floating, yet in the sun it 40mbar apart yet floating
[07:29] <LeoBodnar> It's not really equal, but was showing about 6-8mbar. From calculations I expected around 12mbar, not far off
[07:30] <LeoBodnar> The pressures are equal when ballon rises because it is only half-full or semi-deflated if you want.
[07:32] <Seejjay> Morning All
[07:32] <Seejjay> Is there some kind of 'preseal' / valve on the inlet as I am suprised the Helium stays in the balloon for so long
[07:32] <LeoBodnar> Then the gas inside expands (pressure still = external) and when it stretches the foil envelope to the full, pressure inside stops dropping (since volume stops increasing) but pressure outside is still dropping. Lifting force starts to decrease and when it drops to zero balloon stops ascending and reaches equilibrium
[07:34] <LeoBodnar> I have used epoxy to seal the valve because I have a cable going inside to the pressure sensor
[07:34] <arko> heh i wondered how you pulled that off
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[07:37] <arko> LeoBodnar: ok that makes sense
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[07:38] Nick change: wibble -> Guest3447
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[07:42] <arko> LeoBodnar: does that mean the foil balloon doesn't actually reach maxiumum volume at night?
[07:42] <arko> since this is all really a density function
[07:42] <arko> and mass is fixed
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[07:43] <arko> I'd be interested to see how you estimated the balloons pressure, thats awesome
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[07:44] <LeoBodnar> arke, yes it seems to stretch a bit more during the day otherwise it wouldn't have risen
[07:44] <arko> right
[07:44] <arko> :) cool
[07:46] <arko> sorry for stupid questions, seems so obvious now, but i've had a few whiskeys this evening
[07:46] <DL7AD> fldigi hab mode program does not correct the shift of the trx, is it?
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[07:47] <DL7AD> im currently controlling remote F5VMH's frequency but F5CT is off again.
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[08:08] <DL7AD> anybody stll here?
[08:09] Action: craag_ has just woken up, good morning DL7AD !
[08:09] <DL7AD> good morning. indeed its 3am in texas :D
[08:10] <craag_> Ha! super-dx remote tracking!
[08:11] <DL7AD> im controlling f5vmh's station remotly
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[08:11] <DL7AD> any idea who can track it thereafter?
[08:12] <craag_> Cool, yeah fldigi doesn't have AFC for dominoex.
[08:12] <craag_> I don't know any french hams unfortunately.
[08:13] <DL7AD> could be a point in future.
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[08:14] <DL7AD> but there is the possibility receiving it from switzerland is it?
[08:15] <DL7AD> craag_
[08:16] skywatch101 (6d94b9cc@gateway/web/freenode/ip.109.148.185.204) joined #highaltitude.
[08:18] <craag_> Sorry was looking at globaltuners.. but nearest is in toulouse
[08:19] <craag_> Erm I think there was one guy in Switzerland who received the Pi balloon, but I don't think it'll go into range for him.
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[08:24] <DL7AD> it could be thats its going a bit east. then it would be reachable in hb9
[08:25] <DL7AD> or lyon would be great
[08:32] F5MVO (52e6b25d@gateway/web/freenode/ip.82.230.178.93) joined #highaltitude.
[08:32] <F5MVO> Hello all, i can't to decode B5 signal too weak for me !
[08:33] <DL7AD> yes but i cant control it from your home
[08:33] <DL7AD> its working fine
[08:34] <LeoBodnar> DL7AD: do you see a lot frequency shift?
[08:35] <DL7AD> no not much
[08:35] <LeoBodnar> By the way Geoff-G8DHE do you know if frequency stabilised after it went back into regular daytime mode?
[08:37] <DL7AD> F5MVO teodor F5CT went off probably because of the shift
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[08:41] <F5MVO> i find the B5 frequency on 434.505.570 i see the sgnal on waterfall but i can't to decode too weak for me and the band its very noosy
[08:42] <DL7AD> okay does not matter. its working good from your home
[08:44] <DL7AD> oh execuse i mixed up different calls @5MVO
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[08:48] <LeoBodnar> Thank you F5MVO
[08:53] <F5MVO> i send a message for new South French Tracker perhaps !
[08:55] <fsphil> ah it's floating again
[08:58] <mfa298> LeoBodnar: when i was trying to recieve it overnight it looked like I was mostly getting the tracker information and no telemetry.
[08:58] <mfa298> and it looked like the tracker information was being updated as the errors in the text scrolling along the status bar changed each time
[09:00] f5vmh (c2cedd71@gateway/web/freenode/ip.194.206.221.113) joined #highaltitude.
[09:03] F5CT (5130e8b2@gateway/web/freenode/ip.81.48.232.178) joined #highaltitude.
[09:03] <F5MVO> f5vmh and f5ct joigned
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[09:05] <F5CT> moi je ne l'entend plus pourtant je suis dans la zone de couverture
[09:06] <F5MVO> bonjour F5CTmoi aussi très faible je ne le decode pas
[09:06] <F5CT> Ok merci, je pensais etre en panne.
[09:06] Ugi (5004924d@gateway/web/freenode/ip.80.4.146.77) joined #highaltitude.
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[09:07] <F5MVO> 9 elemnts en 144 pour le 434 ?
[09:08] <F5CT> Eh oui, j'ai une 21 en 432 mais pas de place pour la faire tourner...
[09:08] <Ugi> Wow! B-5 has gone a _huge_ distance!
[09:08] <Ugi> it's quite a week for floaters
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[09:08] <daveake> bursty
[09:09] G0TDJ_Steve (d49f4aee@gateway/web/freenode/ip.212.159.74.238) joined #highaltitude.
[09:09] <Maxell> nah
[09:09] <daveake> oh
[09:09] Herman-PB0AHX (53560375@gateway/web/freenode/ip.83.86.3.117) joined #highaltitude.
[09:09] <daveake> strange
[09:09] <Herman-PB0AHX> good morning to all
[09:09] <daveake> noisy gps I guess
[09:09] <Ugi> or windy?
[09:09] <daveake> It had -12m/s just a moment ago
[09:10] <Maxell> oh hai Herman-PB0AHX
[09:10] <G0TDJ_Steve> Hey GUys!
[09:10] <Ugi> Now -6 m/s again
[09:10] <G0TDJ_Steve> Impressed with LeoBodnar's B5
[09:11] <LeoBodnar> mfa298: I am not sure as I could not receive it during the night. form 22:00 to 04:00 UTC it was in Night mode: TX for 2 minutes, and just emit beeps for 4 min in a loop
[09:11] <Herman-PB0AHX> what's up with B5 is he on vacation or something lol lol
[09:12] <Ugi> Herman-PB0AHX: heading for a beach holiday on the med' you reckon? Looks like it!
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[09:13] <F5MVO> f5vmh : hello
[09:14] <LeoBodnar> It is affected by planes wake turbulence daveake
[09:14] <G0TDJ_Steve> Excellent flight LeoBodnar :-)
[09:15] <Ugi> How long do we reckon f5vmh will be able to keep tracking it?
[09:16] <Maxell> Whatsup with the other French trackers?
[09:16] <F5MVO> he had just a vertical antenna but goog reception
[09:16] <F5MVO> he had just a vertical antenna but good reception
[09:17] <Maxell> Quick, send habamps to France!
[09:17] <Ugi> you are near Paris F5MVO?
[09:17] <F5MVO> yes 15 kms NO
[09:17] <Ugi> did you catch it on the way past?
[09:17] <Ugi> (I mean the signal)
[09:19] <F5MVO> yes a see the signal on waterfall, but too weak for me, and the band too nosy
[09:19] <Maxell> If you can see it on the waterfall
[09:19] <Maxell> it can be decoded
[09:19] <Maxell> for sure
[09:21] <F5MVO> no too noise
[09:22] <F5MVO> its the same for F5CT
[09:23] <Ugi> F5MVO: shame.
[09:23] <LeoBodnar> Being neat big city does not help with noise F5MVO ?
[09:23] <LeoBodnar> near
[09:23] <Ugi> I guess it's a busy area
[09:24] <G0TDJ_Steve> LeoBodnar: Would you consider APRS for future flights?
[09:24] <F5CT> 100 kms south east Orléans
[09:24] <Ugi> F5CT seems to have it too now
[09:25] <F5CT> Now i receive good. Error of me very sorry !
[09:25] <F5MVO> Yes F5CT receive now !
[09:26] <Maxell> \o/
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[09:27] <mfa298> LeoBodnar: that's what I saw happen, Not knowing enough about how the two streams of data were sent I don't know if that helps give any ideas of what happened.
[09:27] <mfa298> that was around 2am local time so during the time when no one plotted positions
[09:27] <G0TDJ_Steve> Hey mfa298 :-)
[09:27] <mfa298> I wondered if the signal may have drifted in such a way that only one stream of data could be decoded.
[09:28] <F5CT> Sorry but 100 kms Nord-West Orléans. hi !
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[09:30] <db_g6gzh_> LeoBodnar: Like mfa298 I also noticed some periods of continuous sending of the information text rather than telemetry
[09:30] Ruler (51932a7b@gateway/web/freenode/ip.81.147.42.123) joined #highaltitude.
[09:31] <Ruler> hello
[09:32] <G0TDJ_Steve> hi
[09:32] <LeoBodnar> Hi Ruler
[09:34] <Maxell> French listeners doing well :o
[09:34] <mfa298> hi G0TDJ_Steve
[09:35] <G0TDJ_Steve> Good Morning mfa298 I was getting paranoid no one could see me :-)
[09:36] <Maxell> G0TDJ_Steve: -echo-
[09:36] <Maxell> *chirp*
[09:37] <G0TDJ_Steve> Maxell: Is that a test for connection?
[09:37] <Maxell> pong
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[09:39] <f5vmh__> hello
[09:40] <f5vmh__> Bonjour a tous
[09:40] <G0TDJ_Steve> Bonjour f5vmh__ De G0TDJ
[09:40] <f5vmh__> Le ballon B-5 il est toujour dans ma couverture .The B5 balloon is still in my cover area !
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[09:42] <f5vmh__> I am not in my home location ,but the equippements it is working well ! I am in Paris Now !You can see my possuition in APRS.fi f5vmh-9
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[09:43] <G0TDJ> Hey, it's me again....
[09:43] <f5vmh__> I saw ,now Daniel F5CT receive again the ballon
[09:44] <mfa298> f5vmh__: well done, with any luck you should be able to keep tracking it for a while.
[09:44] G0TDJ_Steve (d49f4aee@gateway/web/freenode/ip.212.159.74.238) left irc: Quit: Page closed
[09:44] <f5vmh__> Hi G0TDJ...Hello everybody
[09:44] Nick change: G0TDJ -> G0TDJ_Steve
[09:45] <G0TDJ_Steve> /msg NickServ identify shadrach462
[09:45] <mfa298> G0TDJ_Steve: I think you had an extra space in there
[09:45] <G0TDJ_Steve> Yeah
[09:45] <G0TDJ_Steve> Sorted now
[09:45] <mfa298> you may want to change your password
[09:46] <f5vmh__> I was warn ,this morning by Sven, DL7AD,wich is now in Texas.I have swich on my radio ...and strong signal ....
[09:46] <G0TDJ_Steve> Yeah, PITA
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[09:46] <G0TDJ_Steve> mfa298, I just downloaded X-Chat
[09:47] <mfa298> G0TDJ_Steve: I think a lot of us have had the typing a password into irc incidents
[09:47] <G0TDJ_Steve> Now I just have to work out how to change it LOL
[09:48] <LazyLeopard> Nickserv passwords are somewhere round zero on the security scale...
[09:49] <G0TDJ_Steve> I wouldn't be surprised LazyLeopard
[09:49] <LazyLeopard> ;)
[09:49] <mfa298> if it's only an irc password it may not matter too much, if it's your bank password as well can you let us know the account number :P
[09:50] <LazyLeopard> So are mailman ones, usually.
[09:50] <G0TDJ_Steve> Does anyone know if Icarus is still launching this morning?
[09:50] <fsphil> I don't believe it is G0TDJ_Steve
[09:50] <G0TDJ_Steve> LOL No, it's my global 'this one isn't important' password
[09:50] <fsphil> was going near two airports
[09:51] <G0TDJ_Steve> That's a shame fsphil
[09:51] <LazyLeopard> Yeah, never use a nickserv password elsewhere...
[09:51] <G0TDJ_Steve> So, no launches today then...
[09:53] <mfa298> that would seem to be the case at present.
[09:54] <F5CT> Good hear and best with antenna on 434.5 not in VHF...
[09:54] <mfa298> I had a feeling someone else had thought about doing a pico this evening although that might have been scrubbed.
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[09:58] <cm13g09> morning mfa298
[09:59] <G0TDJ_Steve> -echo-
[09:59] <craag_> morning cm13g09
[09:59] <cm13g09> morning craag_
[09:59] <G0TDJ_Steve> Hi Philip and Adrian
[09:59] <craag_> Hi Steve!
[10:00] <mfa298> morning cm13g09
[10:00] <number10> mfa298: that was me thinking of relaunching Nanu that I recovered last weekend - but path takes it too close to London
[10:01] <G0TDJ_Steve> number10Didn't stop Chris last Sunday :-)
[10:01] <mfa298> that wonld be the one I was remembering. I had a feeling you had said it was scrubbed but couldn't remember any details
[10:02] <number10> yesy I saw that G0TDJ_Steve
[10:02] <G0TDJ_Steve> I couldn't guarantee to do it agian.. I was lucky I had a lift ready to go
[10:03] <number10> I was tracking but had to go out so left receiver on - so didnt get the live action
[10:04] <number10> anyway - the fact that I havent got a pico to float yet means I have to be extra careful
[10:05] <G0TDJ_Steve> No problem. I've just started collecting bit together to do my own
[10:05] <G0TDJ_Steve> bits...
[10:05] <number10> thats good - are you doing your own PCB l
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[10:06] <G0TDJ_Steve> For the first one I'll probably use someone elses but I have plans to impliment certian features that other boards don't have
[10:07] <G0TDJ_Steve> Gotta nip out the room - BRB
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[10:13] <f5vmh__> we have an additional station ,herding the ballon ,F1JSU
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[10:17] <G0TDJ> I've been changed...
[10:18] <G0TDJ> Oh well...
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[10:18] <Ugi> good stuff F1JSU!
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[10:18] Nick change: G0TDJ -> G0TDJ_Steve
[10:18] <mfa298> G0TDJ_Steve: I was about to say you seemed to be here twice, but your other personality has just left.
[10:19] <G0TDJ_Steve> :-) My twin
[10:19] <x-f> now we need a tracking station in Andorra
[10:19] <Maxell> Is it also changed for the other not intresting websites?
[10:19] <Ugi> do we know anyone in Lyon?
[10:20] <G0TDJ_Steve> Is APRS permitted in France when Air Mobile?
[10:21] <f5vmh__> In my knoledge ...no
[10:22] <Maxell> There should be this kml file with all the geofences that include aprs yes/np
[10:22] <Maxell> no
[10:22] <G0TDJ_Steve> Shame
[10:24] <G0TDJ_Steve> I wonder what the logistics would be to add HABs to the commercial version of APRS
[10:24] <f5vmh__> For Lyon ......my self ....I don't know ,but have twit to F6AGV ...who is one managing the balloon subject in France....no reaction for instant
[10:24] <Ugi> Well, it's only 5 hours to Lyon on the Eurostar if anyone fancies a weekend away!
[10:26] <mfa298> there's a list of what's known about aprs in europe at http://ukhas.org.uk/general:aprs_legislation
[10:26] <mattbrejza> put a magmount on the roof of hte train and track as you go along
[10:26] <f5vmh__> No problem we will find ,I aware my ADRASEC friends in my region ,we will take care to find one !
[10:26] <G0TDJ_Steve> Cheers mfa298
[10:26] <f5vmh__> I will leave for 40 minits ,now !73,Theo
[10:26] <G0TDJ_Steve> CUL Theo
[10:27] <x-f> here's the APRS-status map - http://goo.gl/maps/MMyCv
[10:27] <G0TDJ_Steve> Cheers x-f
[10:28] <G0TDJ_Steve> I'm surprised the 'EU' isn't all the same
[10:29] <mfa298> it's down to the Amateur Radio laws (ARPS itself isn't illegal but using it on the standard aprs frequecy is)
[10:30] <mfa298> we could run ARPS on ISM but there's not much point in it - we've got a better network in place already on the ISM band.
[10:30] <G0TDJ_Steve> Yeah, it just amazes me that the laws can't be a little more flexible
[10:31] <Geoff-G8DHE_> There is discussion going on with RSGB and then OFCOM about possible changes
[10:31] <G0TDJ_Steve> Oh good
[10:31] <mfa298> a few people have started talking to the rsgb and ofcom so there's some hope we might be able to get a NoV or experimental permit of some sort
[10:31] <G0TDJ_Steve> It seems a trivial thing to me
[10:32] <mfa298> it sounds like it might be difficult on some bands as the CAA don't like it and we'de also need permission from various other users. Although 2m seemed hopeful which would open up some interesting things.
[10:32] <Geoff-G8DHE_> Ian G3SGX is talking with them, bear in mind that 70cms is MoD and CAA radar before us! So 2m where we are Primary is best bet
[10:33] <G0TDJ_Steve> 2m is so under used too
[10:35] <G0TDJ_Steve> 144.800 It would appear with everything else with the exception that it would need an NoV
[10:35] <G0TDJ_Steve> Would small Tx's be hard to source?
[10:37] <Geoff-G8DHE> No I don't think so in fact I think the standard range of devices can be used
[10:37] <gonzo__> I think you can get radiometrix modules on 144.800 and 144.390
[10:37] <Geoff-G8DHE> Whats happening with the other launch today have we heared?
[10:37] <G0TDJ_Steve> fsphil, informed me it was scrapped
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[10:38] <Geoff-G8DHE> Oh right good thing I have qrm SMACK ON .075!
[10:38] <Gadget-Mac> Upu / UpuWork https://www.dropbox.com/s/uyeayelpbvugafe/IMG_20130712_113207.jpg
[10:39] <Geoff-G8DHE> Umm 2 dongle, habamp and ?
[10:39] <daveake> Gadget-Max Upu's on the road
[10:39] <gonzo__> there is going to be some changes to the schedual of the AR licence, when the 2.3 and 3.4GHz bands get auctioned off. And that is an appropriate time to get any other tweaks made. I sent a proposal to the RSGB aboyt airborne op's. And others have doen also
[10:39] <Gadget-Mac> He'll spot it at some point
[10:39] <eroomde> Upu: you can stop by at westcott on the way down if you want a tea
[10:40] <eroomde> just off the M40/A34 junction
[10:40] <G0TDJ_Steve> Well done gonzo__
[10:40] <Gadget-Mac> daveake: but thanks for the info
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[10:44] <WillDuckworth> how well did the domino work last night?
[10:45] <G0TDJ_Steve> Do you mean on B5?
[10:45] <mfa298> apart from some issues overnight it's still going
[10:46] <WillDuckworth> good stuff- just checked on spaceneear - going well.
[10:46] <WillDuckworth> does it seem better at decoding than rtty for equivalent range/power/noise etc do you guys think??
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[10:48] <Geoff-G8DHE> Yes it can be copied right down into the noise typicaly still getting recovery at -23dB snr, I copied this morning right down to SW of Paris 300Km at 0 elevation before I lost it.
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[11:04] <cm13g09> afternoon HeliosFA
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[11:14] <G0TDJ_Steve> Gotta go for a while BBL
[11:14] Nick change: G0TDJ_Steve -> G0TDJ_AFK
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[11:20] <Ugi> This domino looks cool - has anyone tried implementing it on the NTX2 using a resistor ladder & 4-bit parallel output?
[11:23] <eroomde> no but that probably won't work
[11:23] <eroomde> for flights
[11:23] <eroomde> the ntx2's have a bit of a temperature coefficient
[11:24] <eroomde> so it drifts out of spec - the freq jump for a given voltage change drifts aswell as the absolute freq, you see
[11:24] <eroomde> so when i did it i used a 12bit dac and calibrated the ntx2 against temperature
[11:25] <eroomde> so the ucontroller could figure out what voltage to apply through the dac via a lookup table given the temperature
[11:25] <F5MVO> perhpas new station near Geneve
[11:26] <Ugi> I see - just wondered 'cos it looked like a quick and easy way but certainly not as flexible as a high-res D to A
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[11:28] <eroomde> the freq jumps need to be good to within say 3hz
[11:28] <eroomde> would be a hell of a job to tune your resistor values (with trimpots or whatever) to get it to work
[11:28] <eroomde> and then it would only be trimmed for a specific temp
[11:28] <HixWork> B5 seems to be skipping along just north of todays stage of the Tour de France http://goo.gl/GNAAQ
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[11:31] <Ugi> I see - perhaps I underestimate how touchy the system is but if all the jumps are the same then all the resistors should be n & 2n, save for the top & bottom
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[11:33] <Laurenceb> i guess ~7Km float is much easier on the envelope
[11:33] <Laurenceb> as theres ~half the superpressure
[11:33] <Laurenceb> also its below dewpoint, so win/win
[11:35] <Ugi> but that does not fix the temperature issue
[11:35] <Laurenceb> what issue?
[11:36] <Laurenceb> the solar heating?
[11:36] <Ugi> sorry - just following on my discussion with eromde on domino - I got distracted by work half-way through
[11:36] <Laurenceb> oh lol
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[11:39] <Ugi> I take it that this is a latex balloon being floated.
[11:40] <Ugi> it's certainly interesting that it gains a Km when the sun comes out!
[11:43] <eroomde> they have a temperature coefficient too!
[11:43] <Ugi> The guy I am hoping to launch with later in the summer is currently in Chamonix - shame he doesn't have a radio 'cos the top of Mont Blanc would be a good spot to get B-5 for about the next 8 hours!
[11:44] <Ugi> eroomde: true of course.
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[11:45] <Ugi> how is it being implemented on B-5? I assumed it was an RFM (being a float) and so not terribly temperature stable.
[11:46] <mfa298> Ugi: it's a 36" party balloon. Just a very lightweight tracker.
[11:47] <mfa298> http://leobodnar.com/balloons/B-5/
[11:47] <Ugi> mfa298: cool! I didn't think foil went above about 4Km for some reason.
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[11:49] <LeoBodnar> The solar panel malfunctioned (=fell off) in turbulence at about 7:00 UTC It's running on battery only and battery is getting depleted very quickly due to what looks like periodic short circuits. I'll give it another hour or two only.
[11:51] <Ugi> LeoBodnar: shame - it's a wicked looking tracker and 16 hours is incredibly good going!
[11:51] <gonzo__> it's been a cracking flight and I like the datamode
[11:51] <gonzo__> what is the balloon?
[11:51] <Ugi> LeoBodnar: have you considered naked solet-type solar cells for the solar bit?
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[11:51] <LeoBodnar> It's mission is accomplished as I have got all the data I needed. Temperature rise due to the Sun heating at sunrise seems to be 9C and pressure increase due to this is about 2.3kPa. Solar panel works if attached securely. That's all I needed to know. :)
[11:51] <Ugi> gonzo__: see the link above 12:47 by mfa
[11:52] <LeoBodnar> *Its
[11:53] <Ugi> are you using a lipoly as the battery?
[11:53] <LazyLeopard> How'd you figure the solar panels dropped off? Voltages do something interesting, presumably?
[11:54] <Ugi> I guess not at 1.16v
[11:54] <HixWork> Hi LeoBodnar , how'd you get the balloon temp and pressures sorted out?
[11:54] <mfa298> so now we just need a way of tracking over longer distances and the winds in the right direction and we can send a pico to the US - show them how it's really done!
[11:54] <fsphil> trained pigeons reporting back on the status
[11:54] <Laurenceb> why is the balloon so cold?
[11:54] <Laurenceb> temperature is inaccurate?
[11:54] <HixWork> low blood pressure Laurenceb
[11:55] <HixWork> :p
[11:55] <Ugi> if that's inside the balloon then I guess it's because it's foil and not getting heated much by the sun
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[11:56] <LazyLeopard> fsphil: ;)
[11:57] Nick change: Philippe -> Guest89771
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[12:05] <chrisstubbsW> G0TDJ_AFK: Cheapo came back yesterday, thanks for that! :)
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[12:09] <iain_G4SGX> Still up? cool.
[12:09] <HixWork> has anyone got the link to that superbright LED that LeoBodnar linked to last week? cant find in the logs
[12:10] <F5MVO> B5 battery coming low
[12:11] <HixWork> are there any photos of B5?
[12:11] <SpeedEvil> HixWork: what sort of LED?
[12:11] <Ugi> HixWork: http://leobodnar.com/balloons/B-5/
[12:11] <SpeedEvil> HixWork: I've got a good working knowledge of most sorts of LEDs that are in the market.
[12:11] <HixWork> sorry, just scrolled and found
[12:12] <Ugi> The LED beacon was this I think: http://www.leobodnar.com/shop/index.php?main_page=product_info&cPath=90&products_id=213
[12:13] <HixWork> SpeedEvil, the one he used in this http://goo.gl/1S27y
[12:13] <HixWork> yup thats the one, but he sent me the specsheet and i lost it
[12:13] <SpeedEvil> I wouldn't bother.
[12:14] <Ugi> didn't see the datasheet. Sorry.
[12:14] <iain_G4SGX> Do I see solar panels on B5?
[12:14] <Ugi> iain_G4SGX: Yep
[12:15] <HixWork> ahh cool he used winding wire to get the internal sensors - goot thinkinig
[12:15] <Ugi> "solar assisted" but I don't know what the main battery was
[12:15] <HixWork> iain_G4SGX, yes but apprently they failed ~07:00
[12:15] <SpeedEvil> http://uk.farnell.com/cree/xmlawt-00-0000-000lt50e4/led-x-lamp-xmla-260lm/dp/1892510RL - for example
[12:16] <SpeedEvil> Will take 3A pulses all day, outputting about a thousand lumens
[12:17] <HixWork> what sort of pulse would be safe to output that level of light [heat]? i.e on vs off times
[12:17] <SpeedEvil> 1% should be not a problem at all
[12:17] <SpeedEvil> .1s/10s for example.
[12:18] <SpeedEvil> That's about the same heat output (average) as a stock LED.
[12:18] <SpeedEvil> With no heatsink.
[12:18] <HixWork> hmm, was thinking along the lines of more solid light
[12:18] <SpeedEvil> You need a moderateish heatsink then.
[12:18] <SpeedEvil> you want to keep the die below about 75C or so
[12:19] <HixWork> ok, an ally housing would be beneficial to it then?
[12:19] <HixWork> with thermal paste
[12:20] <fsphil> B5, not to be confused with http://i.imgur.com/pOg6vI4.jpg - which also has solar panels
[12:20] <SpeedEvil> You need about a 7C/W heatsink or so. (I don't know how this changes with temperature.
[12:21] <Ugi> fsphil: you need a larger balloon for that payload I reckon
[12:21] <Darkside> fsphil: hahaha
[12:21] <SpeedEvil> http://uk.farnell.com/jsp/search/browse.jsp?N=2031+203169+110434908+110387005+110435690+110435572&Ntk=gensearch&Ntt=heatsink&Ntx=mode+matchallpartial&No=0&getResults=true&appliedparametrics=true&locale=en_UK&divisionLocale=en_UK&catalogId=&skipManufacturer=false&skipParametricAttributeId=&prevNValues=2031+203169&mm=1003753||,&filtersHidden=false&appliedHidden=false&autoApply=false&originalQueryURL=%2Fjsp%2Fsearch%2Fbrowse
[12:21] <SpeedEvil> .jsp%3FN%3D2031%2B203169%26Ntk%3Dgensearch%26Ntt%3Dheatsink%26Ntx%3Dmode%2Bmatchallpartial%26No%3D0%26getResults%3Dtrue%26appliedparametrics%3Dtrue%26locale%3Den_UK%26divisionLocale%3Den_UK%26catalogId%3D%26skipManufacturer%3Dfalse%26skipParametricAttributeId%3D%26prevNValues%3D2031%2B203169 say
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[12:22] <Darkside> fsphil: how many centauri does it take to change a lightbulb
[12:22] <SpeedEvil> 'I don't know how this changes with temperature' - I of course meant external pressure.
[12:22] <G0TDJ_AFK> chrisstubbsW, Cool stuff :D GLad it made it back safe
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[12:23] <SpeedEvil> Convection diminishes greatly - conduction is mostly unaffected by changes, as is radiation
[12:23] <fsphil> Darkside: dunno, how many?
[12:23] <chrisstubbsW> Just blew £45 on solder, flux and a pi cam on farnell too
[12:23] <Darkside> one
[12:24] <Darkside> but back in the old days a million servants would change a million lightbulbs at the slightest whim of the emperor
[12:24] <Darkside> anyways
[12:25] <fsphil> I was watching the Lost Tales a few nights ago, randomly
[12:25] <fsphil> I miss that show
[12:25] <Ugi> looks like B-5 has gone off-radar
[12:25] <Darkside> fsphil: ahhhhh
[12:25] <HixWork> is that a show about spaniels fsphil
[12:25] <Darkside> with the technomancers
[12:25] <Darkside> and the devil
[12:25] <fsphil> yes
[12:25] <fsphil> the devil one was just silly
[12:25] <Darkside> yeah
[12:26] <Darkside> technomancer one was good
[12:26] <fsphil> very
[12:26] <fsphil> set up a few new potential stories
[12:26] <fsphil> HixWork: that's the Lost Tails
[12:27] <HixWork> ah sillly me :)
[12:32] <HixWork> the groundplane on B5 is that alumised mylar?
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[12:43] <iain_G4SGX> Flidgi says a fight today, Icarus but seen no info.Is it in UK?
[12:43] <craag_> Not flying apparently.
[12:43] <fsphil> it's been delayed
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[12:47] <Laurenceb> so looks like foil works nicely if you reduce payload mass?
[12:47] <Laurenceb> it was cruising at <0.7psi overpressure
[12:47] <Laurenceb> burst is ~1.5?
[12:48] <eroomde> apaz
[12:49] <LeoBodnar> Merci very much to everybody who tracked B-5 yesterday and today! It was a good flight and a lot of important data has been collected.
[12:49] <iain_G4SGX> Drawback is the low altitude for tracking range
[12:49] <fsphil> any use for an old Sky Digital receiver?
[12:49] <Laurenceb> better than earlier stuff
[12:49] <iain_G4SGX> Congrats LeoBodnar for some cutting edge Habbing!
[12:50] <Laurenceb> at ~2Km
[12:52] <Laurenceb> if we could use wspr on HF
[12:53] <iain_G4SGX> LeoBodnar: I will be hasslin you for information on PIC and GPS power saving and Dominex coding when I'm ready, hope you dont mind.
[12:55] <HixWork> LeoBodnar, you're just using a ~46mm wire ant for the GPS correct? How did it perform?
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[12:55] <LAGMonkey> ping
[12:56] <eroomde> POOOOOOOOOOOOOOOOOOOOOOOOONG
[12:57] <fsphil> megapong
[12:57] <Laurenceb> fail
[12:57] <eroomde> === Welcome to #highaltitude === I am the channel bot. Type '??' for usage
[12:57] <LAGMonkey> thank you.
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[12:57] <fsphil> imposter!
[12:57] Nick change: eroomde -> [username]
[12:58] Nick change: [username] -> eroomde
[12:59] <eroomde> we just decided to modify one of our injectors in the lthe to improve the momentum ratio based on a quick chat at lunch
[12:59] <eroomde> http://devopsreactions.tumblr.com/post/55161526119/sounds-good-lets-try-that
[13:01] <SpeedEvil> Ow.
[13:02] <SpeedEvil> http://devopsreactions.tumblr.com/post/54501133692/codebase-over-time - is that tin pest?
[13:03] <SpeedEvil> http://www.youtube.com/watch?v=sXB83Heh3_c - yeah
[13:10] <Laurenceb> insane
[13:11] <LeoBodnar> no probs iain_G4SGX, you are welcome !
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[13:13] <LeoBodnar> HixWork: works fine judging by RX reports
[13:14] <iain_G4SGX> I got 100g of Galinistan, ( GaInSn ) which is a liquid at room temperature metal. I'm experimenting with a dynamic VHF antenna. Can anyone think of an application for HAB? Unforunately its solid at cold temps.
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[13:15] <iain_G4SGX> An antenna that melts by the time it lands is a possibilty but not really usefull. !
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[13:16] <SpeedEvil> Rotator?
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[13:17] <iain_G4SGX> Unfortunately its 'sticky' but Ive found this stuff, which is may help . http://www.youtube.com/watch?v=IPM8OR6W6WE
[13:18] <SpeedEvil> A fusible link for a parachute, to detach on warmup - you put it in an icecube on launch
[13:18] <DL7AD> did it terminating transmitting?
[13:18] <SpeedEvil> And it falls out of trees
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[13:18] <fsphil> the battery is flat DL7AD
[13:18] <fsphil> and the solar panel failed
[13:19] <DL7AD> :(
[13:19] <fsphil> or fell off, not sure
[13:19] <HixWork> LeoBodnar, I was using the said smae system when I broke my Srantel. To be honest, it seemed to get a fix quicker than the srantel.
[13:20] <eroomde> sarantel
[13:20] <eroomde> not that it amtters now because they dead
[13:21] <iain_G4SGX> I'm sure with antennas, if its resonant, the more metal in the air the better.
[13:21] <eroomde> yus
[13:21] <eroomde> you collect for energy
[13:21] <craag_> A lot of what the sarantel and chip antenna do I think is filtering. Their bandwidths are very narrow.
[13:21] <eroomde> dishes being an obvious example
[13:21] <craag_> At the cost of antenna aperture.
[13:21] <iain_G4SGX> Thus the GPS whip looks better to me than a chip antenna.
[13:22] <craag_> The ublox markets itself as being very good at mitigating jamming and QRM which probably helps.
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[13:24] <iain_G4SGX> Mind you, satellite lock doesn't seem to have been a major problem with most flights I've seen, unless close to ground.
[13:26] <craag_> Cameras appear to be the biggest threat to them recently.
[13:26] Nick change: number10_ -> number10
[13:27] <craag_> Too many gopros in close proximity raises the noise floor, and can cause lock issues.
[13:27] <HixWork> could you not shield the gopros with mylar or foil etc?
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[13:28] <craag_> Some people have I think, but it's only been a problem with the gopro right next to the module, or with 4+ gopros in the case.
[13:29] <HixWork> If i was going to risk flying that value, it'd be a DSLR :)
[13:30] <craag_> There are two that I can think of, both were sponsored flights so plenty of cash at hand!
[13:31] <craag_> One had a backup tracker payload.. the other didn't.
[13:31] <HixWork> Whoaa just seen the weight specs of the EOS100D man that's light for such a good camera
[13:34] <Laurenceb> <iain_G4SGX> Thus the GPS whip looks better to me than a chip antenna.
[13:35] <Laurenceb> it will have poorer out of band rejection
[13:36] <Laurenceb> i wonder which is lightest
[13:37] <craag_> Yep, worked today though, so I'd assume it's ok on pico/tracker-only flights.
[13:37] <craag_> I wouldn't use one on any camera/pi flight though!
[13:37] <craag_> Too much digital noise.
[13:38] <Laurenceb> http://leobodnar.com/balloons/B-5/Pages/10.html
[13:38] <Laurenceb> whats the second set of wires for?
[13:38] <Laurenceb> going up from the payload
[13:38] <craag_> pressure and temperature
[13:38] <craag_> I'd guess a sensor each
[13:39] <craag_> hmm, not sure about that solar panel arrangement
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[13:42] <iain_G4SGX> Laurenceb: Weight yes, big minus but I reckon the Ublox does most of the out of band rejection anyway.
[13:43] <craag_> The non-MAX models have built in SAW filters I think.
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[13:46] <gonzo__> the sun reflector is a good idea though
[13:46] <Laurenceb> the internal pressure sensor was a better idea :P
[13:46] <Laurenceb> now we know superpressure is practical if you increase the altitude
[13:47] <gonzo__> btw, is there any example code around for the dominoeg16 mode?
[13:47] <Laurenceb> previous stuff was near the ground with ~1.3PSI overpressure during the day
[13:47] <Laurenceb> http://ukhas.org.uk/code:radio
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[13:51] Nick change: G0TDJ_AFK -> G0TDJ_Steve
[13:51] <G0TDJ_Steve> Hey Guys
[13:52] <G0TDJ_Steve> LeoBodnar, Are you about?
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[14:01] <gonzo__> Laurenceb, ta. Will see if I can decrypt that
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[14:04] <HixWork> Just found this gallery of Apollo XI engine recovery pictures, awesome http://goo.gl/Ev2Y9
[14:06] <SpeedEvil> Coupla sprays with WD40, wipe it off with a damp cloth, and fly!
[14:08] <Laurenceb> http://i.telegraph.co.uk/multimedia/archive/02515/crew_2515924k.jpg
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[14:08] <Laurenceb> lol - how happy they look reflects their role
[14:09] <fsphil> haha
[14:10] <Laurenceb> Collins is like "F U"
[14:10] <fsphil> I think collins really needs to go to the toilet
[14:10] <swl> Bonjour d'Orléans
[14:10] <fsphil> realises it'll take 20 minutes to get out of the suit
[14:11] <swl> 73
[14:11] <fsphil> good afternoon swl
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[14:12] <number10> they all look happy here - I suppose since they survived - http://www.telegraph.co.uk/science/picture-galleries/9945372/Amazon-CEO-Jeff-Bezos-recovers-Apollo-11-engines-from-the-ocean-floor.html?frame=2515934
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[14:41] <Lunar_LanderU> hello
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[14:47] <Lunar_LanderU> for some reason the NTX2 shift is still 85 Hz
[14:47] <Lunar_LanderU> and I measured the resistors, and they have the correct values
[14:53] <x-f> what about the input voltage?
[14:54] <x-f> did you try a bit different nominal resistors?
[14:54] <Lunar_LanderU> not yet
[14:54] <Lunar_LanderU> the values should be OK as the transmitter has worked normally in the other flight computer
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[14:56] <Lunar_LanderU> bbl
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[14:56] <x-f> me too
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[14:58] <Ugi> Hi guys - I seem to have got thrown off there some time ago
[14:58] <Ugi> Just noticing how many receivers are up on the map tonight
[14:59] <Ugi> getting ready for the multi-payload excitement tomorrow?
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[15:01] <HixWork> april was faily well represented too http://i.imgur.com/Z5bxPEB.jpg
[15:01] <HixWork> *fairly
[15:03] <Ugi> At least there were some balloons up then - there's not even anything to track today!
[15:05] <HixWork> I think its B5 legacy data
[15:09] <Jess--> I was just looking at b-5, looks like it had a good flight, did the battery die or just ran out of receivers
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[15:10] <HixWork> solar failed and then battery dies out
[15:11] <Jess--> that's a shame on the solar, any clues as to the reason (never worked or gave up in low temps)?
[15:17] <LeoBodnar> Jess--: solar panel wasn't supposed to be there to start from. It wasn't fixed properly. It worked while it held on so it's served its purpose as a test.
[15:18] <Jess--> nice to know that it was a sucessful test then
[15:18] <Geoff-G8DHE_> Was that supposed to the Main Bus B voltage = solar panel LeoBodnar
[15:18] <LeoBodnar> No, main system bus, it was supposed to be regulated to 2.0v
[15:18] <Geoff-G8DHE_> Ah wondered!
[15:23] <Laurenceb> what was the second cable up to the balloon for?
[15:23] <Laurenceb> i see 4 conductors = i2c+power? then another 2?
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[15:25] <eroomde> long hot slow afternoon
[15:25] <eroomde> not firings i think
[15:25] <eroomde> no*
[15:28] <Laurenceb> waiting for sqp to converge....
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[15:30] <Maxell> wat
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[15:33] <Laurenceb> arggg
[15:34] <Laurenceb> stupid sqp crap is failing epically
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[15:35] <Gadget-Mac> LeoBodnar: is the bus supply from the TPS61000 ?
[15:37] <LeoBodnar> Yes, step-up converter
[15:37] <LeoBodnar> Laurenceb: Yes, I2C bus+power
[15:38] <Laurenceb> so what were the other two wires
[15:40] <HixWork> Laurenceb, are you talking wires into the balloon? there was internal pressure and internal temp of the balloon
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[15:45] <LeoBodnar> Which pic do you refer to Laurenceb ?
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[15:56] <Laurenceb> http://leobodnar.com/balloons/B-5/Pages/8.html
[15:56] <Laurenceb> the "yellow"
[15:56] <Laurenceb> or is that nylon line?
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[16:22] <number10> x-f - I like the photo of the landing in the forest
[16:23] <LeoBodnar> It's a kevlar safety line Laurenceb
[16:23] <Laurenceb> ah
[16:25] <arko> aww
[16:25] <arko> B-5 died it seems?
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[16:26] <jcoxon> Hey
[16:26] <jcoxon> what happened to b5?
[16:26] <arko> ahoy
[16:26] <arko> the main bus b never undervolted
[16:27] <jcoxon> Still flying?
[16:27] <arko> it doesn't look like it
[16:29] <Babs> LeoBodnar couldn't find a new waistcoat or a cigar and after that, there was no hope really
[16:29] <arko> damn impressive flight, i was hoping the solar would kick in, but i think LeoBodnar said it's not wired to charge
[16:30] <eroomde> Babs: i see united biscuits has got a royal warrant
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[16:31] <arko> after working at nasa this was the funniest scene since it's pretty damn true https://www.youtube.com/watch?v=C2YZnTL596Q
[16:31] <arko> "tell me this isn't a government operation"
[16:31] <mfa298> from what was said earlier it sounds like the solar panel fell off / got disconnected
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[16:31] <mfa298> and the battery died around lunchtime
[16:31] <LazyLeopard> He said earlier he thought it had lost its solar panel during a bit of turbulence around 07:00z. After that the battery started going down quite uickly, possibly due to an intermittent short.
[16:31] <arko> ahh
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[16:34] <LeoBodnar> The mission was a success for what I wanted it to do -collect pressure / temperature data inside the balloon at sunrise and test if solar panel worked in principle.
[16:36] <LeoBodnar> There were a lot of add-on thin single core wires everywhere so no wonder it could have shorted something.
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[16:38] <eroomde> ooh another 787 fire
[16:38] <eroomde> heathrow closed
[16:38] <Ugi> ouch
[16:38] <eroomde> my friend left SF the day after the korean airlines crash
[16:38] <eroomde> and she left heathrow a few hours before the 787 fire
[16:39] <eroomde> she's a jonah
[16:39] <Ugi> she's not carrying any high-power navigation-jamming equipment by any chance?
[16:40] <eroomde> she's not really into electronics
[16:40] <Ugi> probably for the best in the circumstances
[16:41] <staylo_> the fire they had on the 787 in Boston was a nightmare for firefighters to deal with apparently, will be interesting to see if this is a repeat
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[16:41] <eroomde> let's hope it's not battery-related again
[16:42] <eroomde> that would be a disaster
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[16:42] <Ugi> it's not exactly going to inspire confidence whatever the cause
[16:43] <arko> oh man thats no fun
[16:43] <arko> good thing im flying 747 and airbus
[16:44] <arko> engineers cant figure out lipos
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[16:45] <staylo_> Apparently a Thomson 787 just had to return to Manchester from a flight to Orlando, good luck getting the passengers back aboard that one ;)
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[16:48] <arko> staylo_: "hey guys, i know your last plane caught on fire, lets try another one, im sure it will be fine"
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[17:10] <arko> more netsplits?
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[17:16] <arko> daveake: on the register is see :)
[17:17] <daveake> Well it is a Register flight, so yes :)
[17:18] <arko> \o/ woo
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[17:25] <eroomde> "As a failsafe, SPEARS can also be commanded to fire the igniter if its accelerometers detect it's falling below the programmed trigger height, that's to say, if the balloon bursts prematurely."
[17:25] <eroomde> can you please explain to lester what a failsafe is tomorrow
[17:25] <eroomde> he seems to not just not understand it, but so perfectly and completely and diametrically misunderstand it
[17:36] <arko> lol
[17:38] <daveake> yeah have started that process not easy
[17:38] <daveake> afk beer
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[17:47] Nick change: Martin__ -> Martin_G4FUI
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[17:51] <DL7AD> good morning
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[18:02] <G0TDJ_Steve> Erm...
[18:03] <G0TDJ_Steve> Am I here?
[18:04] <craag_> yep
[18:04] <craag_> :)
[18:04] <G0TDJ_Steve> Difficult to tell sometimes Philip. Gets mighty quiet :-)
[18:04] <craag_> The calm before the storm..
[18:04] <craag_> (tomorrow)
[18:04] <G0TDJ_Steve> Yeah... I@m gonna miss that :-(
[18:05] <craag_> That's annoying
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[18:05] <G0TDJ_Steve> Yeah, previous engagement
[18:05] <craag_> These things happen :)
[18:06] <G0TDJ_Steve> Yeah, I know they'll be more
[18:06] <craag_> You'll be able to catch up on the hilarity later, when their payload actually drops on land.... and crushes a car.
[18:06] <G0TDJ_Steve> LOL :D
[18:07] <DL7AD> ^^
[18:07] <G0TDJ_Steve> I will glance at the tracker from time to time on my phone
[18:07] <G0TDJ_Steve> What's launch time?
[18:08] <G0TDJ_Steve> Oh, hang on. I have the Calendar
[18:08] <craag_> 1000ISH, So probably 1200-1230
[18:08] <craag_> As it is a big complicated one.
[18:08] <G0TDJ_Steve> Not on the calendar
[18:08] <G0TDJ_Steve> OK I'll see if I can keep an ear in
[18:09] <Geoff-G8DHE_> sO WHAT TIME IS b-6 TONIGHT LeoBodnar ;-)
[18:09] <G0TDJ_Steve> :D Yeah!
[18:09] <craag_> If the prediction strays further towards soton I might go out and set up tracking at the landing site.
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[18:09] <craag_> B-6 B-6 B-6!
[18:09] <LeoBodnar> Lol, I don't want to steal the show from tomorrow and also I finally need some sleep XD
[18:10] <Geoff-G8DHE_> Not the only one ;-) But a really interesting flight !
[18:10] <LeoBodnar> It won't be long though, I have made B-6 tracker today.
[18:10] <G0TDJ_Steve> How long is Dave's flight likely to be up?
[18:10] <LeoBodnar> Balloon - check, Helium - check.
[18:10] <G0TDJ_Steve> Nice one Leo
[18:11] <G0TDJ_Steve> Do you knw if B5 has been recovered LeoBodnar?
[18:13] <LeoBodnar> G0TDJ_Steve: it is probably still floating and approaching FR/IT border.
[18:13] <arko> LeoBodnar: i dont believe you sleep
[18:13] <arko> you should start a hab network at this rate
[18:13] <LeoBodnar> Well believe it or not I do sometimes :)
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[18:13] <arko> just have one launch as one is coming down
[18:13] <G0TDJ_Steve> LOL Cripes!
[18:13] <arko> very impressive flights so far
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[18:14] <DL7AD> remove the solar and add an additional battery to its payload :)
[18:14] <LeoBodnar> I have been considering this :) Would be real fun to send a few balloons up with some interval and make them transmit on the same frequency within allocated time slots so you don't need to retune.
[18:15] <G0TDJ_Steve> I would like to see a cluster sent up LeoBodnar 6 at once. to see how they disperse
[18:15] <LeoBodnar> DL7AD: What is the situation with tracking on the continent? Say Southern France / Italy?
[18:15] <arko> LeoBodnar: that would be epic
[18:15] <arko> leobodnar.com/balloons/B-6/
[18:16] <arko> i have that tab open already
[18:16] <LeoBodnar> XD
[18:17] <Steffanx> 3 times ..
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[18:17] <Steffanx> meh, window fail
[18:17] <DL7AD> <LeoBodnar> i have a good contact to paris station F5VMH but not southern. he said to me he wants to call other persons but i do not know if he did. im going to ask him again.
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[18:19] <DL7AD> LeoBodnar: are you about planning b-6 this weekend?
[18:20] <LeoBodnar> There will be a lot of launches this weekend so maybe early next week?
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[18:31] <CHRISG7OGX> Alan F6AGV has posted an alert with pix to his mailing list
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[18:36] <DL7AD> LeoBodnar: okay i will tell him and ask him again for southern stations i can ask
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[18:39] <LeoBodnar> DL7AD: Looks like mid next week is good for crossing France. http://ready.arl.noaa.gov/hypubout/12931_trj001.gif
[18:41] <DL7AD> LeoBodnar: or if you lauch the ballon later it will cross nl de and pl. theres a good chanse to get coverage
[18:42] <LeoBodnar> I have noticed this too DL7AD :)
[18:42] <DL7AD> ^^ okay
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[18:44] <DL7AD> LeoBodnar: or we are going to chase it next time with an airplane ^^
[18:44] <x-f> number10, thanks, yeah, we were happy to find it just hanging around :)
[18:45] <LeoBodnar> Haha, you need a very low V stall airplane :)
[18:46] <LeoBodnar> In fact you need an airplane that can stay in the air at zero airspeed
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[18:46] <LeoBodnar> Or do tight turns
[18:46] <x-f> helicopter!
[18:46] <Lunar_Lander> hello
[18:47] <x-f> hi
[18:47] <arko> like these https://www.youtube.com/watch?v=cWTcCtYl5Cs
[18:47] <DL7AD> turn circles. but the problem are the costs.
[18:49] <arko> yay spin modes
[18:49] <DL7AD> sec idea. in emergency launch a latex ballon which is tracking it from the top
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[18:52] <x-f> James and some others (iirc) have tried the balloon-to-balloon transmissions and data relay, but there were some issues
[18:53] <DL7AD> what goes wrong?
[18:54] <x-f> i don't remember
[18:55] <Lunar_Lander> x-f, thought a lot about the transmitter issue on my way home
[18:55] <Lunar_Lander> still have no idea
[18:55] <Lunar_Lander> will check the supply voltage next
[18:57] <x-f> it was an interesting project, somebody should finish it some day
[18:58] <DL7AD> LeoBodnar: when battery was not sufficient did you power transmitter and gps at the same time? prob solar will be sufficient powering just the gps and the transmitting.
[18:58] <x-f> Lunar_Lander, have you soldered the resistors in place already?
[18:58] <Lunar_Lander> yeah
[18:58] <x-f> ah, so no easy swapping them
[18:58] <Lunar_Lander> no problem
[18:58] <Lunar_Lander> the resistors are definately correct
[18:58] <x-f> maybe the math isn't
[18:59] <Lunar_Lander> hm
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[18:59] <Lunar_Lander> the same resistors worked on the other board which also was 3.3V
[18:59] Nick change: TIBS01 -> TIBS01-2e0sgg
[19:00] <x-f> then you have to check the voltage indeed
[19:00] <x-f> have you double checked the wiring?
[19:01] <Lunar_Lander> yea
[19:01] <Lunar_Lander> it is the same on both boards
[19:01] <Lunar_Lander> that is what puzzles me
[19:02] <Lunar_Lander> on the other board it has a nice 600 Hz shift
[19:02] <LeoBodnar> DL7AD: solar panel become disconnected early in the morning. This flight was not designed to be powered by solar, just check that it would work at all and it did work for the brief time from the sunrise until it got disconnected.
[19:03] <DL7AD> LeoBodnar: so the next is going to be powered fully by battery again?
[19:03] <LeoBodnar> I have not decided yet :)
[19:04] <DL7AD> okay :)
[19:06] <eroomde> he will decide in about 10 minutes
[19:06] <eroomde> then fly it in about 1 hour
[19:08] <LeoBodnar> XD I need to grow up
[19:08] <fsphil> nooooo
[19:08] <fsphil> I've seen grownups, they're no fun
[19:10] <LeoBodnar> OK, I have decided not to
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[19:16] <DL7AD> lol
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[19:16] <Gadget-Mac> LeoBodnar: I think the solar panels have ALOT of merit
[19:17] <mfa298> launch it tomrrow at 10am, give us something to do/track during the LOHAN faffage!
[19:17] <fsphil> lohan could launch on time
[19:17] <fsphil> ....
[19:17] <LeoBodnar> apparently their voltage is very temperature dependent so it's not that easy to get max power efficiency out of them
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[19:18] <BrainDamage> Gadget-Mac: http://4.bp.blogspot.com/_D_Z-D2tzi14/S8TRIo4br3I/AAAAAAAACv4/Zh7_GcMlRKo/s1600/ALOT.png this ?
[19:19] <mfa298> where's that pig shaped balloon
[19:21] <eroomde> i like that alot
[19:21] <eroomde> LeoBodnar: you you have to present a variable impedance load to them
[19:21] <eroomde> with some feedback tovary the load
[19:21] <eroomde> to maximise I*V
[19:22] <eroomde> it's non-triv as you can imagine
[19:22] <fsphil> MPP
[19:22] <eroomde> fazackery
[19:22] <LeoBodnar> Exactly eroomde, so power management controller separate from main flight computer as it needs running inside quite a fast control loop and die the last
[19:23] <eroomde> lol
[19:23] <eroomde> yes exactly
[19:23] <eroomde> i think Linear probably make a chipoid that does it for you
[19:23] <eroomde> because linear do stuff like that
[19:23] <eroomde> they are completely great, and usually quite expensive at production volumes. but teehee who cares
[19:23] <LeoBodnar> ..and wake up the first. And you have several power sinks to juggle priorities of: GPS, UHF, battery charger, heater
[19:24] <eroomde> baddabing
[19:24] <eroomde> http://www.linear.com/product/LT3652
[19:24] <fsphil> the attiny43u has a built-in boost converter. considering using that with solar cells + super cap
[19:24] <eroomde> that's v interesting
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[19:25] <eroomde> http://circuits.linear.com/339 etc
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[19:25] <fsphil> hah
[19:25] <fsphil> nice
[19:25] <LeoBodnar> If you just have solar panel -> battery charger it's reasonably trivial, perturb and observe to maximise I*V etc
[19:28] <LeoBodnar> I have seen them - they are high voltage unfortunately
[19:29] <SpeedEvil> Practically - for small batteries - you pick a solar panel voltage a little higher then the peak power voltage, add a shunt regulator, and you're done.
[19:30] <SpeedEvil> Connect the panel in parallel with the batteries - with a blocking diode - and it closely approximates a constant current charger.
[19:30] <SpeedEvil> The losses from not doing a proper charger are in the 25% range, tops.
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[19:40] <LeoBodnar> 25% counts so if doing it it must be done right. Otherwise you have a mix of linear regulators and inefficient DC-DC converters and LiPos can't be charged below 0C by the way
[19:42] <Gadget-Mac> LeoBodnar: One of the energyharvesting chips worth looking at ?
[19:42] <LeoBodnar> I can't remember the PV open circuit voltage tempco, I think it is reasonably high. Luckily it is negative
[19:45] <db_g6gzh_> LeoBodnar: I'm curious about the configuration of that solar panel. Given that it was wrapped around the payload presumably at best only half of it is illuminated so presumably the cells are not all in series or you'd lose a lot of the voltage in the shaded cells.
[19:46] <LeoBodnar> THey are in series but it was still the worst possible configuration. I did not have a sunny enough day to test it before the flight.
[19:47] <db_g6gzh_> So did you just have a lot of excess voltage so it didn't matter? I maen it seemed to work from what was said.
[19:49] <gb73d> https://twitter.com/SungrazerComets/status/355365077521661952
[19:49] <DL7AD> Theres is a type called LiFePo4. i tested it up to -22*C in charging and discharging.
[19:49] <DL7AD> normal test: https://docs.google.com/file/d/1APe4unSKfS7ag5qzewib_L6ZjgBBcrY1L9IGMQB46Mjsba8uBKEh3MdvNCJt/edit?usp=sharing
[19:49] <DL7AD> cold test: https://docs.google.com/file/d/1UsiHloNmTSXiqBbZfS69aCcjJ4H6wXcI2CHcHqblJe8jfaOfZO15obMlFKmZ/edit?usp=sharing
[19:50] <LeoBodnar> Yes, it seems to have heated up the payload. On previous flight I had UHF chip at -4C during the day. THis one went to +15C :-O
[19:52] <DL7AD> the difference between 20 and -17 degress is about 30% less at LiFePo4
[19:53] <LeoBodnar> Did you charge it at -17C as well?
[19:54] <DL7AD> ehm no.
[19:54] <DL7AD> but i have to check again. i think you can load them at -25*C
[19:54] <DL7AD> *charge
[19:55] <LeoBodnar> Are they heavy? I have seen a lot of LiFePo4s in AA format. It's too heavy for what I am trying to do.
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[19:56] <db_g6gzh_> Apart from the s/n benefit the DominoEX also seems to tolerate impulse noise better than RTTY
[19:56] <DL7AD> they are really similar to lipo
[19:57] <cm13g09_> I have a theory that ISH time also applies to anybody who operates anything that flies. That includes airlines....
[19:57] Nick change: cm13g09_ -> cm13g09
[19:58] <DL7AD> i have a pilots license
[19:58] <DL7AD> but just private
[19:59] <DL7AD> ehm how much did your last battery weight?
[19:59] <DL7AD> of p-5
[20:01] <DL7AD> weight: 13.5g, 400mAh at 3,2V http://shop.lipopower.de/LiNANOZ-400mAh-32V-LiFePo-Einzel-Zelle-SL-FHC-20C
[20:03] <LeoBodnar> 7.5 grams (AAA Energizer Lithium) Otherwise balloon won't get as high: http://ukhas.org.uk/_detail/projects:microballoons:foil-floaters-leo.png?id=projects%3Amicroballoons%3Adata
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[20:03] <LeoBodnar> Oh, cool nevertheless DL7AD ! I will order one to play with.
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[20:06] <eroomde> trying to write c for the first time in a while, having been using python and c++ a lot recently. fire up gvim
[20:06] <eroomde> #import <iostream.h>
[20:06] <DL7AD> LiFePo4 Temperature Charge: 0°C bis +55°C Temperature Discharge: -20°C bis +55°C Storage: -20°C bis +25°C
[20:07] <eroomde> fail
[20:09] <KT5TK_QRL> try #include
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[20:12] <LeoBodnar> indeed eroomde, ordered still DL7AD
[20:12] <DL7AD> :).
[20:13] <fsphil> isn't iostream.h c++?
[20:13] <LeoBodnar> Low temp LiPos can go down to -30C but discharge only (with 75% from room temp capacity)
[20:15] <KT5TK_QRL> #include <stdio.h>
[20:15] <KT5TK_QRL> for plain C
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[20:28] <arko> LeoBodnar: nice plot!
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[20:40] <DL7AD> blub
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[21:22] <Willdude123> Reddit is difficult when you have an internet connection that struggles with images.
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[21:24] <arko> its also a time sink
[21:25] <craag_> Willdude123: When that happens I tend to go to /r/tfts, hilarity without images!
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[22:24] <Willdude123> How are CRC checksums calculated in python?
[22:24] <fsphil> same way as in C
[22:24] <fsphil> or, use a library if one exists
[22:25] <maze> Willdude123, you mean crc32?
[22:25] <Willdude123> Is there some lib then?
[22:25] <Willdude123> I think I mean CRC16 :)
[22:25] <maze> https://maze.io/2009/10/15/generating-crc32-in-python/
[22:25] <maze> oh
[22:26] <maze> there is no crc16 builtin
[22:26] <fsphil> there seems to be libraries for most things
[22:26] <maze> https://github.com/greghaynes/Afproto/blob/master/Python/crc16.py seems like a sane implementation
[22:27] <fsphil> big tables
[22:27] <fsphil> Willdude123: you could also check the habitat source code. it's written in python, and must do the same thing at some point
[22:32] <mfa298> I think ibanezmatt13 had something fairly decent in his code.
[22:37] <Willdude123> I'll ask him, but I best get my beaglebone up and running first.
[22:38] <Willdude123> Taken me since 6 pm to get the wifi working with my usb dongle.
[22:38] <Willdude123> And it's not working yet.
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[22:40] <mfa298> you can probably find it on his github as a gist
[22:40] <mfa298> although it sounds like you need to concentrate on one thing at a time.
[22:41] <mfa298> trying to work on too many things at the same time usually means you never finish any of them
[22:41] Action: mfa298 tends to have that problem
[22:46] <fsphil> sounds familiar
[22:47] <mfa298> at least if the new hourly predictor comes out soon allowing anyone to use the same instance i can scrub that vm and set of ideas.
[22:48] <craag_> Yeah that does clean up things a bit.
[22:49] <craag_> I need to put my enhancements into a pull-request and get it mainlined :)
[22:49] <craag_> then i can delete it all...
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[23:11] <SpeedEvil> Hahah. http://www.youtube.com/watch?v=9sOdP8b1bIY - ROFL.
[23:13] <arko> so amazing
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[23:48] <Gwendir> test
[23:55] <arko> hello
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[00:00] --- Sat Jul 13 2013