highaltitude.log.20111019

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[00:56] <griffonbot> Received email: Mark Jessop "Re: [UKHAS] uBlox 6 Breakout"
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[02:32] <griffonbot> Received email: Robert Darlington "Re: [UKHAS] uBlox 6 Breakout"
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[02:36] <griffonbot> Received email: Robert Darlington "Re: [UKHAS] uBlox 6 Breakout"
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[02:38] <griffonbot> Received email: Mark Jessop "Re: [UKHAS] uBlox 6 Breakout"
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[05:07] <BrokenWing> hello :)
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[05:13] <BrokenWing> any body here?
[05:13] <stilldavid> BrokenWing: hiya
[05:14] <BrokenWing> hi I was a bit supprized to find this topic.
[05:15] <stilldavid> high altitude stuff?
[05:17] <BrokenWing> Well sort of. I am a glider pilot recovering from a high altitude landing accident.
[05:18] <stilldavid> oh, interesting. this group does mostly unmanned stuff& weather balloons and such
[05:18] <SamSilver> 100 000 ft and above
[05:18] <SamSilver> or lower
[05:20] <Darkside> BrokenWing: hey
[05:21] <Darkside> are you involved with the group that was planning on sending a glider up to 30km or so?
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[05:21] <BrokenWing> wow, I thought that might be the case. Only connection I might have to that is my first sailplane instructor,
[05:21] <Darkside> i've got a friend who keeps bugging me saying that they're going to try and get a glider up to the level our balloons get to :P
[05:22] <Darkside> but the main guy that was financing the project died a few years back
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[05:24] <BrokenWing> no, saiplanes get high in waves but not that high.
[05:31] <SamSilver> Steve Fosset
[05:33] <Darkside> thts the one
[05:33] <Darkside> something about teh polar vortex
[05:34] <BrokenWing> dissapeared in a plane?
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[05:34] <Darkside> http://www.perlanproject.org/
[05:34] <Darkside> thats the project
[05:36] <Darkside> nice, they got to 15.4km altitude
[05:36] <Darkside> in a DG505!
[05:37] <DrLuke> amazing
[05:37] <Darkside> BrokenWing: what high altitude gliding were you doing?
[05:38] <Darkside> and what happened?
[05:38] <plantain> that was meant to be a test flight - they didn't think the conditions were powerful enough to climb at all
[05:39] <BrokenWing> I was flying a foot launched rigid wing in the CO rockies.
[05:40] <Darkside> foot launched? >_>
[05:40] <Darkside> as in, down a slope?
[05:41] <DrLuke> lol
[05:41] <BrokenWing> yes
[05:41] <Darkside> cool
[05:41] <Darkside> plantain: is a glider pilot
[05:41] <Darkside> was at the junior worlds this year
[05:42] <BrokenWing> Tell him I own a HP14
[05:43] <Darkside> plantain: ^
[05:44] <BrokenWing> If he was at the worlds in the 70s he might know the ship.
[05:44] <Darkside> he wasn't born then :P
[05:45] <plantain> heh, I know the ship
[05:45] <plantain> I own an LS4
[05:45] <BrokenWing> nice.
[05:46] <BrokenWing> My rigid wing HG is a composite design.
[05:47] <plantain> did you build the hp14 yourself BrokenWing ?
[05:48] <BrokenWing> No. started on a HP16 and bought the completed hp14.
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[05:49] <plantain> going to buy a hp24? :P
[05:50] <BrokenWing> I thought HP21 or was it 22 was the last of the line.
[05:51] <plantain> no, some guy has picked up where the original designer left off
[05:51] <plantain> nearing completion, supposed equivalent performance to an ls4 with a kit price of 20k or so
[05:52] <BrokenWing> Is it still metal?
[05:53] <plantain> no
[05:53] <plantain> http://www.hpaircraft.com/hp-24/
[05:54] <BrokenWing> Figures. Schreader got about all you could out of metal.
[05:57] <plantain> so where do you fly from?
[05:58] <BrokenWing> Boulder CO
[06:00] <BrokenWing> For the saiplanes.
[06:00] <plantain> cool, I have been planning to come fly there for a while (friends live nearby)
[06:01] <BrokenWing> All aver the west for HG.
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[06:03] <BrokenWing> Good Flyin.
[06:04] <plantain> I hear pennsylvania is pretty good for ridge soaring
[06:04] <plantain> will have to get there eventually
[06:04] <plantain> might come over next year for the worlds in uvalde
[06:04] <plantain> australia's going to win you know :)
[06:05] <BrokenWing> I Flew my PB xc over uvalde.
[06:06] <BrokenWing> Maybe :)
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[06:08] <plantain> we did win the last worlds at uvalde :>
[06:08] <plantain> having the guy who won them last time in uvalde as the team coach for this years team should be a good psychout
[06:09] <BrokenWing> Yea, that would do it.
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[06:11] <BrokenWing> My brother is down under right now.
[06:12] <BrokenWing> He traded his wings for a surfboard.
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[06:23] <griffonbot> Received email: Anthony Stirk "Re: [UKHAS] uBlox 6 Breakout"
[06:27] <Upu-> http://photosynth.net/view.aspx?cid=4970652e-0fd2-48db-b906-1402ea2ed96a
[06:27] <eroomde> morning
[06:27] <Upu-> does that open without the need to sign into Live ?
[06:27] <Upu-> morning eroomde
[06:27] <eroomde> 'Oops... the leaves fell off and we're temporarily unable to load that page.'
[06:27] <Upu-> http://photosynth.net/view.aspx?cid=4970652e-0fd2-48db-b906-1402ea2ed96a&m=false&i=0:0:0&c=0:0:0&z=528.631586539839&d=-1.09656394720308:-1.40480763229355:-1.37574262934609&p=0:0&t=False
[06:27] <Upu-> that ?
[06:28] <eroomde> nice :)
[06:28] <Upu-> damn Microsoft :)
[06:28] Nick change: Upu- -> Upu
[06:28] <eroomde> although now it wants me to install silverlight
[06:28] <Upu> oh yeah
[06:29] <number10> I seem to be stuck on 99% install of silverlight
[06:30] <eroomde> awesome pic though
[06:30] <number10> done: pretty cool Upu
[06:31] <Upu> still working through all the images
[06:31] <Upu> cheers
[06:33] <Darkside> fuck i hate power outaes
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[06:34] <number10> morning Darkside
[06:35] <eroomde> evening Darkside
[06:35] <x-f> hi Darkside
[06:35] <Darkside> hey
[06:35] <Darkside> power is out around here :P
[06:36] <Darkside> so my laptop is charging off a 12V SLA
[06:36] <eroomde> must. not. loose. internet. access.
[06:37] <Darkside> yep
[06:37] <Darkside> tethered roto my phone
[06:37] <number10> what would you do without internet for a day Darkside
[06:38] <Upu> hey Darkside
[06:38] <Upu> thanks for taking a look at that board
[06:38] <Darkside> number10: probably learn music on the piano
[06:40] <eroomde> good answer
[06:40] <eroomde> i would chop my arm off to get a piano in the house
[06:40] <Darkside> still, goddamnit
[06:41] <eroomde> well, actually specifically probably not
[06:41] <eroomde> but a non-piano-=useful limb
[06:41] <Darkside> haha
[06:41] <Darkside> it would defeat the purpose
[06:41] <number10> eroomde can play one handed
[06:41] <Darkside> you can do lots of useful things with just one hand
[06:41] <eroomde> anyway
[06:42] <Darkside> oh jeez
[06:42] <eroomde> what sort of stuff would you play Darkside ?
[06:42] <Darkside> i'm watching the voltage on this SLA drop
[06:44] <number10> *number10 bets flast word from darkside begins with F
[06:44] <number10> last
[06:45] <Darkside> hahahaha
[06:45] <Darkside> nah its sitting stable at 12.6V
[06:45] <Darkside> and my laptop battery is almost charged
[06:47] <Darkside> my UPS os beeping
[06:47] <Darkside> i think i should turn it off
[06:47] <eroomde> you have a ups for a laptop?
[06:47] <eroomde> isn't that just called a battery?
[06:48] <Upu> lol
[06:48] <Darkside> for the rest of my desk
[06:48] <Darkside> radios + inverter for laptop is powered off a 50Ah 12V SLA
[06:48] <Darkside> once my laptop is charged i'm powering off the inverter
[06:49] <Darkside> as i want the battery for radio stuff
[06:49] <eroomde> i can't knock that
[06:49] <eroomde> ham in the blood
[06:49] <Darkside> :P
[06:49] <Darkside> i've got another 100Ah of SLAs under the bed
[06:49] <Darkside> not sure how charged they are though
[06:50] <eroomde> that could make a heck of an alarm clock
[06:51] <Darkside> oh?
[06:51] <Upu> http://ava.upuaut.net/files/IMG_6494_stitch.jpg
[06:51] <eroomde> phils?
[06:52] <Upu> hmm ?
[06:52] <eroomde> whose and what is the photo?
[06:53] <eroomde> trying to orient myself
[06:53] <Upu> mine
[06:53] <Darkside> bbl
[06:53] <Upu> south of england
[06:53] <eroomde> ok, so it's looking south and that's the thames estuary?
[06:53] <Upu> yup
[06:53] <Upu> France in the distance
[06:53] <eroomde> nice :)
[06:54] <Upu> I think that was after burst
[06:54] <Upu> right I really should go to work
[06:54] <Upu> laters!
[06:54] <eroomde> see you
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[07:20] <daveake> fsphil The car PC rebooting was definitely temperature. Case fan wasn't running. With the fan off and the case on, it crashes in 30 mins. With the case off it ran overnight
[07:22] <griffonbot> Received email: John Underwood "Re: [UKHAS] uBlox 6 Breakout"
[07:23] <daveake> Video from Buzz just after the burst: http://www.flickr.com/photos/daveake/6259577425/in/set-72157627784758417
[07:24] <griffonbot> Received email: Mark Jessop "Re: [UKHAS] uBlox 6 Breakout"
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[08:30] <griffonbot> Received email: Anthony Stirk "Re: [UKHAS] uBlox 6 Breakout"
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[08:53] <griffonbot> Received email: "Re: [UKHAS] uBlox 6 Breakout"
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[09:07] <fsphil> buzz video is a bit blurry, but not bad considering the camera
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[09:08] <fsphil> hi daveake
[09:08] <fsphil> <fsphil> buzz video is a bit blurry, but not bad considering the camera
[09:09] <daveake> Yeah, the video is about what I was expecting, but the photos less good
[09:10] <daveake> I was expecting more, too, but the damn balloon burst too early :p
[09:10] <fsphil> yea I was a but surprised by the altitude
[09:10] <fsphil> I expected it to be still in the air by the time I got to the station
[09:11] <daveake> I was paying for petrol, came back to the car and it was on its way down!
[09:11] <griffonbot> Received email: "Re: [UKHAS] uBlox 6 Breakout"
[09:11] <daveake> Really, with a larger balloon and smaller payload than the last one, it should have got higher not lower!
[09:12] <daveake> My camera logic was to switch the camera on for 1 minute in 6, starting at 30km, and stopping on descent.
[09:12] <fsphil> a nice reminder that we'll never be able to predict these things 100%
[09:12] <daveake> And the "descent" cutdown logic only kicked in at 38km, which of course never happened!
[09:12] <fsphil> anything odd about the balloon?
[09:13] <daveake> Looked fine. Inflation was easy as we had very little wind.
[09:13] <daveake> rjharrison suggested it may have had ice crystals form on the way up. Certainly it went through cloud.
[09:14] <daveake> Anyway, I have another one :D
[09:14] <daveake> I'll probably do a flight with the 1600g Hwoyee plus a single Canon camera
[09:16] <daveake> Also I'll do a re-run of cloud2 with camera/video and 1000g Hwoyee. But this time without the sea landing, I hope :)
[09:16] <daveake> I quite fancy doing a launch from cambs with a landing on the continent
[09:23] <number10> those still were a little disapointing - do you think it frosted the lense?
[09:28] <daveake> yes
[09:37] <fsphil> you still got more detail than the logitech camera tim flew
[09:39] <daveake> I think that was V1 of the "808" camera. V3, which NigeyS has, uses a better sensor I believe
[09:40] <daveake> I might add one next time just to video the balloon bursting
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[09:41] <number10> I have an #8 I think
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[10:05] <WillDuckworth> Hey UpuWork - what capacitor do you reckon is needed in your breakout design? 100nF or something?
[10:06] <UpuWork> open to suggestions on that
[10:06] <Upu> Darkside suggested 10nF but felt it needed more I think
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[10:06] <Upu> back in asec
[10:07] <Darkside> wha?
[10:08] <Darkside> i use 100nF
[10:08] <NigelMoby> Boo
[10:08] <Darkside> boo
[10:08] <NigelMoby> Hey ds
[10:08] <NigelMoby> I built 2 neganuts yesterday
[10:08] <Darkside> meganuts
[10:08] <NigelMoby> Meganuts*
[10:08] <Darkside> you have big nuts?
[10:09] <NigelMoby> Lol
[10:09] <NigelMoby> 1 for ATS-1 and 1 for picochu-3
[10:09] <Darkside> heh ok
[10:09] <Darkside> how many PCBs do you have left?
[10:09] <NigelMoby> 7
[10:09] <Darkside> cool
[10:10] <WillDuckworth> they did the rounds at the conference
[10:10] <NigelMoby> Nice of them to send 12 instead of 10
[10:10] <NigelMoby> Hey will, did u get a look at it ?
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[10:11] <UpuWork> back
[10:11] <NigelMoby> Wb dude
[10:12] <NigelMoby> How many breakouts u getting done for the Ublox?
[10:13] <UpuWork> whatever fits on a 160x100 board
[10:13] <WillDuckworth> Yeah - NigelMoby, saw that, Upu's and rjharrison's boards aswell and has inspired me to investigate Eagle....
[10:13] <UpuWork> haha
[10:13] <UpuWork> Muhahahhahaha
[10:13] <NigelMoby> Lol oh dear
[10:13] <UpuWork> welcome to a world of pain
[10:14] <NigelMoby> Upu loves eagle
[10:14] <UpuWork> love hate
[10:14] <NigelMoby> Defo
[10:16] <UpuWork> there will be a few spare so if you want them
[10:16] <NigelMoby> 3 pls lol
[10:16] <UpuWork> lol
[10:16] <UpuWork> 3 breakouts ? :)
[10:16] <NigelMoby> Pls
[10:17] <UpuWork> why do you need 3 ?
[10:17] <NigelMoby> I got 3 modules...
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[10:17] <UpuWork> ah you're not mounting the chip on the board directly ?
[10:17] <NigelMoby> Nooo
[10:18] <UpuWork> ok
[10:18] <UpuWork> My next board is going to be small
[10:18] <NigelMoby> Although... For ATS-2 that might b a better option
[10:19] <UpuWork> conference was annoying got so many ideas now I don't think I can do them all myself
[10:20] <NigelMoby> Lol nice to see its inspired a lot of people
[10:22] <NigelMoby> Darkside, will u be back in the u.k next summer?
[10:22] <Darkside> yep
[10:22] <NigelMoby> Yey!!
[10:23] <NigelMoby> Same place?
[10:24] <UpuWork> so 100nF Darkside ? I've left a 0603 sized connector
[10:24] <NigelMoby> 0603 ... Oh boy
[10:25] <Darkside> Upu: well it works for me
[10:25] <Darkside> even with that it puts about a 30mW ripple on the 3.3v rail
[10:25] <Darkside> 30mV*
[10:25] <Darkside> but everything seems to handle that ok
[10:26] <NigelMoby> Epoxy on the antenna joint I'm guessing?
[10:26] <Darkside> araldite
[10:26] <NigelMoby> Ahh
[10:26] <UpuWork> hmm 3.3v...
[10:26] <UpuWork> all my stuff is 5v
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[10:27] <Darkside> Upu: fix that :P
[10:27] <UpuWork> Can I just connect the serial to an Arduno ?
[10:27] <NigelMoby> Those antenna pins really are tiny n fragile.
[10:27] <UpuWork> yeah they are
[10:27] <eroomde> can we swap, on the ukhas conf vids page, 'video' and 'alternative' to make the lower quality stream one the 'alternative'?
[10:27] <Darkside> Upu: incoming serial tothe arduino will work
[10:27] <UpuWork> sure switch it over
[10:27] <Darkside> outgoing needs to be divided down
[10:28] <UpuWork> ok
[10:28] <NigelMoby> 3.3 ftw :)
[10:29] <NigelMoby> Morning eroomde
[10:29] <UpuWork> The Alternatives were up up by fsphil
[10:29] <UpuWork> Do you have a login for wiki or shall I do it eroomde
[10:32] <UpuWork> back shortly
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[10:32] <eroomde> i think i did in 2006
[10:32] <eroomde> infact i'll do it as it'll prompt me to dig it up
[10:34] <GW8RAK> For those of you who complain about the high cost of energy "the annual costs per kW is 7100 Euros"
[10:37] <NigelMoby> I had my annual statement yesterday, 800 for electric, 1600 for gas, that's 18% more than the year before
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[11:05] <GW8RAK> A question about the fldigi tracker, can it read a WAV or similar file and then plot data?
[11:08] <NigelMoby> Upload data that's been read from a recording u mean?
[11:08] <GW8RAK> Yes, live data will be recorded and then plotted at a later date.
[11:09] <NigelMoby> Hm never tried, should be able to though?
[11:10] <Laurenceb_> yes it can
[11:10] <NigelMoby> :D .. hi Laurence.
[11:11] <GW8RAK> Thanks Laurenceb_
[11:11] <Laurenceb_> i added named pipe support
[11:11] <GW8RAK> May come back to you with details of how.
[11:11] <Laurenceb_> so it can open a wav file in fifo mode
[11:11] <Laurenceb_> as an easy way to get data in
[11:11] <NigelMoby> Ahh good work.
[11:12] <Laurenceb_> you can use Jack and stuff
[11:12] <Laurenceb_> but its rather more complex
[11:12] <GW8RAK> Excellent, that all sounds straightforward. Talking to someone about a remote balloon launch.
[11:13] <Laurenceb_> named pipes only work on a local system, i think fldigi supports newwork sound servers as well
[11:14] <GW8RAK> Real time plotting is theoretically possible, but it may have to be recorded data
[11:15] <Laurenceb_> i used a named pipe to get data off my CC1020 radio, as its simple
[11:33] <earthshine> o/
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[11:44] <eroomde> GW8RAK: 'remote'?
[11:44] <eroomde> i'm intrigued
[11:48] <Laurenceb_> yeah... do you have internet acress to the 'remote' machine?
[11:49] <Laurenceb_> seen jocoxons remote fldigi web interface?
[11:50] <Laurenceb_> *jcoxon
[11:51] <GW8RAK> eroomde, this is just a vague idea. I have someone going to Antarctica and they'll have some time on their hands
[11:52] <Laurenceb_> sweet
[11:53] <GW8RAK> Radio regulation should be pretty lax and we don't have to worry about it landing on someone's head
[11:53] <GW8RAK> HF datamode? Listen from the UK?
[11:54] <Laurenceb_> surely itd be _slightly_ easier to run fldigi on a machine over there
[11:54] <GW8RAK> It can be run over there, but getting the data out could be a problem
[11:56] <Laurenceb_> store it as a text log?
[11:57] <GW8RAK> Open to ideas
[12:06] <BrainDamage> can the crap actually withstand the polar temps? because they can reach like -90°C, which would be colder than what you'd get in the atmosphere
[12:06] <stilldavid> phew, it's early.
[12:06] <eroomde> it's after lunch actually
[12:06] <stilldavid> it's just 6am! grrrr
[12:07] <stilldavid> also: brrrrr
[12:07] <stilldavid> Colorado is cold, as it turns out.
[12:07] <eroomde> GW8RAK: how do you aquire someone going to Antarctica?
[12:07] <stilldavid> alright, off to rendezvous point, will be on in a bit.
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[12:08] <GW8RAK> One of my customers is going down there on an ESA project
[12:09] <fsphil> would be much easier to have fldigi run there
[12:09] <fsphil> then only the text strings need to be uploaded
[12:09] <fsphil> how's internet access down there?
[12:09] <GW8RAK> This is all being investigated
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[12:11] <GW8RAK> Darkside would be the nearest group member
[12:11] <Darkside> heh
[12:12] <Darkside> get them to fly HF >_>
[12:12] <fsphil> yea, Darkside will receive that
[12:14] <SpeedEvil> -90C sounds a bit too cold.
[12:14] <GW8RAK> But we need a scientific or educational purpose for it.
[12:15] <GW8RAK> -90C is a bit too cold
[12:15] <GW8RAK> But if it is -46 on the ground, does it get colder with altitude or is it already as cold as it gets?
[12:16] <BrainDamage> SpeedEvil: that was according to wikipedia in the winter
[12:16] <BrainDamage> and far from the shore ofc
[12:17] <SpeedEvil> If the pressure at which CO2 is a solid is 0.3 bar at -90C, that means that if the partial pressure of CO2 is under 30% in the atmosphere, it won't condense?
[12:17] <SpeedEvil> resublimate
[12:18] <SpeedEvil> So I guess it'd have to hit -160C to get CO2 snow.
[12:19] <GW8RAK> Concordia base hit -84.6C in 2010 and -70C is about normal for the winter
[12:21] <stilldavid> anyone know why the "Redownload data from server" button wouldn't work on OSX Lion?
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[12:23] <GW8RAK> From the Daily Mash "The gap between fictional robots, which are brilliant, and real robots, which are shit, is not shrinking, it's widening.
[12:24] <fsphil> stilldavid, are you in online mode
[12:24] <stilldavid> oh, no. does it have to be online to download?
[12:24] <fsphil> I think so
[12:24] <stilldavid> derp
[12:24] <stilldavid> that did it, thanks!
[12:25] <stilldavid> t minus 2.5 hours or so...
[12:25] <stilldavid> will be on intermittently throughout the day
[12:29] <Laurenceb_> wonder how hard itd be to do CO2 capture in Antarctica
[12:29] <Darkside> its probably been done
[12:30] <Darkside> there was a huge french experimental campaign
[12:30] <Laurenceb_> intersting
[12:30] <Darkside> using ZP's
[12:30] <GW8RAK> CO2 capture in the atmosphere?
[12:34] <Laurenceb_> Darkside: link?>
[12:34] <Darkside> cant remember
[12:34] <Darkside> they had a persistent notam a while back
[12:35] <Laurenceb_> CNES?
[12:35] <Darkside> again, no idea
[12:40] <UpuWork> eroomde can you PM me your postal addess for this NTX2
[12:40] <eroomde> UpuWork: ok
[12:54] <fsphil> anyone want to swap a 650 for a 075?
[12:54] <fsphil> I've got too many 650's
[12:55] <fsphil> (well, three)
[12:55] <number10> you'll be messing up those repeaters
[12:55] <eroomde> don't want to mess up those repeaters
[12:56] <eroomde> all that ailment chat that might have to be delayed
[12:56] <jonsowman> :P
[12:56] <eroomde> all that insight into 'the thing about the cortina gearbox was...'
[12:56] <jonsowman> fascinating i'm sure
[12:57] <fsphil> lol
[12:58] <Upu> *cough* secondary users *cough*
[12:59] <Upu> lol just read what you put eroomde
[13:00] <Upu> so damn true, my first listen in on the local repeater was two people on about the wing mirrors on the honda accrod
[13:00] <Upu> Accord
[13:00] <eroomde> all that argument over whether or not to take the newbury bypass between swindon and dullfarthampton
[13:01] <eroomde> i'm honestly disgusted when i tune in sometimes
[13:01] <fsphil> hehe, Oliver's talk is still encoding
[13:01] <eroomde> we stupidly tried to use a repeater to co-ordinate a chase once
[13:01] <eroomde> WRONG
[13:01] <Upu> what you trying to say fsphil that it over ran a little ? :)
[13:01] <eroomde> it was obviously just a local repeater for local people
[13:01] <Upu> lol
[13:02] <Upu> oh yeah me and Rob got "done" by the HAM police for doing SSTV on the SSTV calling channel
[13:02] <eroomde> oh?
[13:02] <fsphil> I should have went onto the repeaters when I was there, see if I got any reaction to a 2I0 callsign :)
[13:05] <fsphil> probably none at all
[13:05] <fsphil> hmm.. I'm getting adverts via twitter now
[13:09] <griffonbot> Received email: Oliver de Peyer Astrobiologist "[UKHAS] Re: Li-Ion and cold"
[13:17] <fsphil> the remains of that payload was impressive
[13:17] <Zuph> Morning, #highaltitude
[13:17] <fsphil> hiya Zuph
[13:17] <eroomde> yes very impressive
[13:17] <eroomde> i've been having a think about ways of sterilising
[13:18] <eroomde> and staying sterilised
[13:18] <Zuph> So 2M in the UK is just as bad as 2M in the US, is what I'm hearing.
[13:18] <eroomde> i also think you could probably get the mobile PCR lab (mighty impressive!!) down to about 2kg
[13:24] <eroomde> and do some UK flights
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[13:29] <Zuph> Anyone have a chance to play with the Linux ST-link software linked yesterday?
[13:30] <eroomde> jonsowman or Randomskk
[13:30] <eroomde> ping
[13:30] <jonsowman> hi eroomde
[13:32] <jonsowman> whats up
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[13:32] <stilldavid> wheee! on the road!
[13:33] <stilldavid> so does dl-fldigi just need anything that can NMEA to upload chase car data?
[13:34] <eroomde> jonsowman: copy of gatchan.mp4
[13:34] <eroomde> was on pip
[13:34] <eroomde> would like
[13:34] <jonsowman> ok will do
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[13:36] <fsphil> stilldavid, in theory. I think there may be an issue with one particular kind of gps
[13:36] <stilldavid> I grabbed a venus, think that'll work?
[13:36] <fsphil> that I can't say. the one I have worked but I can't tell what module is in there
[13:37] <stilldavid> heh, well one way to find out I suppose
[13:38] <eroomde> you have an entire sweetie shop (sorry, "candy store") of things at your disposal stilldavid
[13:38] <eroomde> you should be able to do function tests with everything
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[13:39] <stilldavid> definitely. if there's anything y'all want tested..
[13:39] <stilldavid> build a list, I guess
[13:40] <stilldavid> alright, gonna conserve battery. bbiab
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[13:52] <griffonbot> Received email: Oliver de Peyer Astrobiologist "[UKHAS] Re: Black polyethylene for solar balloons - bulk buying?"
[13:55] <griffonbot> Received email: Oliver de Peyer Astrobiologist "[UKHAS] Re: UKHAS 2011 Conference"
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[14:16] <stilldavid> Ugh, traffic.
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[14:18] <stilldavid> ETL looking closer to 16:00.
[14:25] <eroomde> UTC?
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[14:31] <Laurenceb_> http://www.economist.com/node/18897425
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[14:31] <Laurenceb_> epic flamebait is flamebait
[14:32] <stilldavid> Yes, eroomde
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[14:55] <eroomde> Randomskk or jonsowman ping
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[15:09] <priyesh> what is the official title for the altitude record?
[15:09] <priyesh> UK/World Amateur Altitude Record for ...
[15:09] <priyesh> unpowered flight?
[15:09] <priyesh> weather balloon?
[15:11] <costyn> priyesh: http://www.hobbyspace.com/NearSpace/index.html although that's not specifically amateur
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[15:17] <griffonbot> @kylehotchkiss: RT @LVL1WhiteStar: Dan Bowen's amateur superpressure improvement talk, video now on Youtube, based on prior meteo research- http://t.co/ ... [http://twitter.com/kylehotchkiss/status/126678395022082048]
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[15:19] <Laurenceb_> http://www.flickr.com/photos/esa_events/sets/72157627767903603/show/
[15:19] <Laurenceb_> nice
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[15:30] <UpuWork> priyesh http://ukhas.org.uk/general:uk_records
[15:30] <UpuWork> UK Record Horus 15.5 - 40575 m (133120 ft)
[15:30] <priyesh> UpuWork: i was looking for the official title
[15:30] <Laurenceb_> good luck beating that
[15:30] <UpuWork> thats official because we say it is :)
[15:30] <Laurenceb_> >41Km IIRC
[15:30] <priyesh> 40575m
[15:30] <UpuWork> Highest in the world was PBH-13 (LM/ Cornell U)
[15:31] <UpuWork> 135,030 ft
[15:31] <UpuWork> 41157 m
[15:31] <UpuWork> http://arhab.org
[15:31] <priyesh> UpuWork: no like what to call it
[15:31] <UpuWork> but these are Amateur
[15:31] <priyesh> e.g. UK Amateur Weather Balloon Altitude REcord
[15:31] <UpuWork> don't think there is any "official" Guiness Book of Records
[15:31] <UpuWork> oh in that case http://ukhas.org.uk/general:uk_records
[15:31] <UpuWork> no one else records them so thats it
[15:31] <priyesh> okay
[15:31] <priyesh> thanks UpuWork
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[15:32] <UpuWork> but in short only 2 balloons have exceeded 40km
[15:32] <UpuWork> though I suspect more will be to follow
[15:32] <UpuWork> normal is 30-38km
[15:32] <priyesh> what port does dlfldigi output on (tcp/ip)
[15:33] <eroomde> normal to about 3 sigma is 30-35
[15:33] <UpuWork> might be more if you do the last 6 months launches when Hwoyee came along
[15:34] <Laurenceb_> its pretty much impossible to exceed 37Km without Howyee balloons
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[15:34] <Laurenceb_> that was explored pretty well
[15:34] <eroomde> agreed
[15:34] <Laurenceb_> but we maybe harent explored Hwoyee performance as well, it might just be possible to hit 41Km
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[15:34] <eroomde> i think we got to 36km with a 3kg kaymont once
[15:34] <eroomde> that was about it
[15:35] <UpuWork> Laurenceb fill it with Hydrogen jobs done
[15:35] <Laurenceb_> haha
[15:35] <Laurenceb_> actually that might work
[15:35] <daveake> I thought my Hwoyee 1600 would get to ~40km, but it only managed 35 ish
[15:35] <Laurenceb_> wonder if it diffuses out
[15:35] <eroomde> well, that would probably only get you another couple of hundred m
[15:35] <Laurenceb_> hmm
[15:35] <Laurenceb_> need 600m more than Darkside to claim the title
[15:36] <UpuWork> Darkside was under a 1600g Hwoyee I think
[15:36] <eroomde> possible
[15:36] <UpuWork> so we have 2000g with Hydrogen to go yet
[15:36] <Laurenceb_> whats scale hight at 40Km?
[15:36] <eroomde> yes it was
[15:36] <daveake> Previous flight used a Hwoyee 1000 with heavier payload, and that got higher :p
[15:36] Action: Laurenceb_ works out the scale height
[15:36] <UpuWork> I don't think there is enough data on Hwoyee at the moment
[15:36] <daveake> nope
[15:37] <Laurenceb_> scale hight is about 6Km
[15:37] <eroomde> if everyone could collect good launch data
[15:37] <UpuWork> their website claims 1600g burst = 36km
[15:37] <eroomde> payload mass, free lift, ascent rate, burst alt
[15:37] <daveake> And there's alwats going to be some randomness with QC, ice on the envelope, launch conditions, etc
[15:37] <eroomde> then before long we just get a machine learning algo to tell us
[15:37] <Laurenceb_> exp(600/6000)=~1.1
[15:38] <eroomde> me wants data
[15:38] <UpuWork> I think we all do, Steve Randall especially
[15:38] <daveake> There is a data page on ukhas .... I'll update with mine
[15:38] <Laurenceb_> so you need to get to ~10% lower density
[15:38] <eroomde> we should probably work out what data we actually need
[15:39] <eroomde> i think it is: balloon size, neck load, ascent velocity
[15:39] <eroomde> oh and burst alt
[15:39] <eroomde> i think everything else is just linearly dependant on those 4
[15:39] <UpuWork> random speculation but if we can get ~ 4.5km more than rated out of a 1600g 42.5km should be feasable with a 2000g however I just made all this up and it should be take with sceptism
[15:39] <Laurenceb_> ok so hydrogen gives you~7% more lift
[15:39] <eroomde> indeed
[15:40] <Laurenceb_> which is <10% :(
[15:40] <eroomde> good atmospheric conditions needed
[15:40] <eroomde> i guess summer
[15:40] <UpuWork> you could ring up Hwoyee and ask them to make a one off 3000g designed to go very very high
[15:40] <Laurenceb_> but hydrgen + 2000g rather than 1600g, and an untra light payload + good filling control + right weather
[15:40] <Laurenceb_> may well give a world record
[15:40] <UpuWork> Payload weight doesn't seem to be playing a massive role at the moment *
[15:41] <UpuWork> *not enough data to validate this
[15:41] <Laurenceb_> no
[15:41] <Laurenceb_> launch over the sahara desert
[15:41] <Laurenceb_> lower gravity and lots of hot air
[15:41] <eroomde> Randomskk and or danielrichman - it would be super useful to log: balloon size, neck load in addition to ascent rate and burst alt which we get anyway
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[15:41] <eroomde> we should be able to 'learn' a burst predictor
[15:42] <Laurenceb_> actually.. hotter ground level weather will help you a lot
[15:42] <Laurenceb_> as will higher tropopause
[15:42] <DanielRichman> hmm so we could add metadata fields to the flight docs where people can put neck load/balloon size in beforehand or at launch
[15:42] <eroomde> hence launching in summer
[15:42] <DanielRichman> then have something trawl through the data
[15:42] <eroomde> yeah
[15:42] <Laurenceb_> looking at weather models to find tropopause hight would be sensible
[15:42] <SpeedEvil> What we really need is hard data on differential burst pressure.
[15:43] <DanielRichman> It might be interesting to have a statstics daemon that calculates 'things' from a completed flight and its data, perhaps to make a small info box on the currently selceted flight more interesting
[15:43] <DanielRichman> this could be one of its roles
[15:43] <SpeedEvil> And inferential pressure at burst diameter.
[15:43] <eroomde> i think that's just linearly dependant on the other things we already collect
[15:43] <DanielRichman> however, that's a bit of a way off
[15:43] <eroomde> i can't invert non-invertible matrices Speedevil, gimme a break
[15:43] <Laurenceb_> of course i bet you could get a world record more easily in Australia
[15:43] <priyesh> what port does dlfldigi output on (tcp/ip)
[15:43] <Laurenceb_> but that doesnt count
[15:43] <SpeedEvil> I mean actually measured with sensors.
[15:43] <DanielRichman> priyesh: 'output'? You mean, to talk to the listener servery thing?
[15:43] <DanielRichman> if so, that's just HTTP 80
[15:44] <priyesh> DanielRichman: no.. not listener
[15:44] <Laurenceb_> unfortunately this means Darkside might soon take a new world record
[15:44] <priyesh> does it not output on port 7XXX?
[15:44] <eroomde> DanielRichman: essentially, if you know the balloon size, neck load (i.e. payload mass), ascent rate and burst, and you have a bunch of historical data of these things, we can actually just use machine learning to make a burst predictor
[15:44] <eroomde> rather than explicitly giving the predictor a load of science
[15:44] <DanielRichman> priyesh: I don't know, I've never used that feature... but I think it exists
[15:44] <DanielRichman> eroomde: cool
[15:44] <eroomde> which might be the more web 2.0 way of doing things
[15:44] <NigeyS> priyesh, ask fsphil
[15:44] <priyesh> fsphil: ping :P
[15:45] <UpuWork> well Bello used a 2000g Hwoyee
[15:45] <Laurenceb_> its odd if you tried to make a world record balloon with the thinnest polythene sheet
[15:45] <UpuWork> and didn't have a particularly heavy payload
[15:45] <Laurenceb_> it wouldnt get very high
[15:45] <UpuWork> it didn't look that heavy anyway
[15:45] <eroomde> UpuWork: what alt?
[15:45] <Laurenceb_> Upuwork:but what was the free lift?>
[15:45] <UpuWork> http://ukhas.org.uk/general:flight_data
[15:45] <UpuWork> no idea
[15:45] <UpuWork> I'll mail him and ask
[15:46] <Laurenceb_> Horus16 is interesting
[15:47] <Laurenceb_> that should have got really high, but it superpressureised
[15:47] <Laurenceb_> enough to give overnight float too
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[15:47] <Laurenceb_> i wonder if there manufacturing tolerances that caused that, or maybe temperature
[15:48] <UpuWork> ok mailed Michael
[15:48] <Laurenceb_> the 1600 altitude record didnt pressureise nearly as much
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[15:48] <UpuWork> Darkside
[15:48] <Laurenceb_> iirc it went into a float around 40Km?
[15:48] <UpuWork> put your flight up http://ukhas.org.uk/general:flight_data
[15:48] <UpuWork> pls
[15:48] <daveake> yes, am about to
[15:49] <Laurenceb_> i wonder if the 2000gram balloons pressurise more?
[15:50] <Laurenceb_> does anyone know if they are larger, or use thicker material?
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[15:50] <Laurenceb_> if they use thicker latex that would be unfortunate
[15:50] <Laurenceb_> but would explain Horus16
[15:51] <eroomde> Laurenceb_: we (cusf) I guess will be flying some soon
[15:51] <eroomde> they'll be well instrumented
[15:51] <Laurenceb_> would be interesting to take some measurements of the envelopes non inflated
[15:51] <Laurenceb_> latex thinckness and non inflated size
[15:52] <Laurenceb_> arg spelling
[15:52] <Laurenceb_> also theres going to be an optimum free lift, to avoid premature burst or pressurization
[15:53] <eroomde> we really need this balloon neck flight computer innit
[15:53] <eroomde> ok
[15:53] <eroomde> let's build one
[15:53] <jonsowman> eroomde: hi
[15:53] <Laurenceb_> might be the shape of the 'burst hight function' has a narrowish peak you need to hit
[15:53] <Laurenceb_> with optimum free lift
[15:53] <eroomde> jonsowman: hi
[15:53] <eroomde> did I ping you?
[15:53] <jonsowman> you did
[15:53] <eroomde> oh
[15:53] <eroomde> mistake
[15:53] <Laurenceb_> bbl
[15:53] <eroomde> sorry
[15:53] <jonsowman> haha ok
[15:53] <jonsowman> np
[15:53] <eroomde> actually i just can't remember
[15:53] <eroomde> oh yes
[15:54] <stilldavid> filling now
[15:54] <stilldavid> http://spacenear.us/tracker/
[15:54] <eroomde> no don't worry, solved the problem
[15:54] <eroomde> was to do with installing older version with homebrew
[15:54] <jonsowman> ah ok
[15:55] <Randomskk> just got back
[15:55] <Randomskk> from sodding labs all day
[15:55] <Randomskk> hi eroomde
[15:55] <Randomskk> let me get you that video right away
[15:55] <eroomde> hello
[15:55] <Randomskk> also I got the book you <3
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[15:55] <Randomskk> it is not light reading by any stretch of the imagination
[15:55] <eroomde> yep was just asking about installing old version of homebrew packages
[15:55] <eroomde> but actually it's really easy
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[15:55] <eroomde> they now have a tool that tell you the tags and their commits
[15:55] <jonsowman> yeah
[15:55] <jonsowman> i had to use it once
[15:55] <eroomde> so you just checkout that commit then berew install as normal
[15:55] <robacarp> hey whats the name of that aprs viewing software?
[15:55] <jonsowman> i forget what for
[15:56] <jonsowman> heh homebrew is great
[15:56] <eroomde> robacarp: I don't know - we don't really use aprs here
[15:56] <jonsowman> robacarp: UIView perhaps?
[15:56] <eroomde> we have our own balloon flight viewing software at spacenear.us/tracker
[15:57] <robacarp> eroomde: well, that'll help. Watching KI6YMZ today
[15:58] <stilldavid> no aprs on ki6ymz
[15:58] <stilldavid> dl-fldigi, robacarp
[15:58] <stilldavid> 434.650
[15:58] <stilldavid> usb
[15:58] <stilldavid> we're just finishing filling
[15:59] <robacarp> stilldavid: I knew I could count on you
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[16:02] <daveake> UpuWork - flight data page updated
[16:02] <stilldavid> getting close!
[16:03] <NigeyS> hey stilldavid , almost ready? :D
[16:03] <eroomde> has anyone every tried reflecting sound off a balloon?
[16:03] <eroomde> just thinking that ultrasonics could be a nice way of getting balloon size from a balloon neck flight computer
[16:03] <NigeyS> URF ? .. would that work ?
[16:04] <eroomde> urf?
[16:04] <NigeyS> ultrasonic range finder
[16:04] <eroomde> yeah that's what i'm thinking
[16:04] <stilldavid> 2m
[16:04] <eroomde> not sure how well it would work at the low gas densities
[16:05] <NigeyS> hmm, not sure, worth looking at though
[16:05] <eroomde> could be useful data
[16:05] <NigeyS> although most ive seen have a fairly small range, 30cm ish .. wouldnt the balloons at max altitude be to big for them ?
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[16:05] <eroomde> i've seen one with higher range
[16:05] <robacarp> stilldavid: are you guys able to hit any repeaters from out there?
[16:06] <eroomde> and of course the speed of sound in helium is much faster
[16:06] <NigeyS> yup
[16:06] <NigeyS> i was thinking Ed..
[16:06] <x-f> seeedstudio ones have a range of a few meters
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[16:06] <NigeyS> back to dans talk about balloon stretch on the pico balloons..
[16:06] <NigeyS> would a flex sensor measure that ?
[16:06] <SamSilver> eroomde: Dan has video of some experiments he did with sound used for measuring
[16:07] <NigeyS> never used or seen them so not sure exactly how well they work
[16:07] <SamSilver> latex
[16:07] <stilldavid> OFF
[16:08] <stilldavid> it's goin' fast
[16:08] <stilldavid> like, really fast
[16:08] <NigeyS> lol
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[16:09] <NigeyS> nothing on the tracker yet ...
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[16:10] <WillDuckworth> yep - it's on the go - may need to 'filter' the flights as the newest tracker page can't scroll flight items by the looks of it
[16:11] <stilldavid> hit the tracker yet?
[16:11] <eroomde> stilldavid: yep
[16:11] <NigeyS> ahh got it tnx will
[16:11] <eroomde> it's there and live
[16:11] <stilldavid> col
[16:11] <eroomde> good stuff
[16:11] <stilldavid> nice
[16:12] <stilldavid> we're going to drive a bit to the expected landing site
[16:12] <stilldavid> might lost it
[16:12] <stilldavid> but we'll stay on the interstate
[16:12] <eroomde> predicted burst?
[16:12] <stilldavid> high? :P
[16:12] <stilldavid> 33km
[16:12] <stilldavid> http://share.findmespot.com/shared/faces/viewspots.jsp?glId=0OgO4KsSNqunjT1B9tWRD8fhbg456x1dF
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[16:16] <stilldavid> getting a lot of gibberish out of it now
[16:16] <stilldavid> not sure what's up
[16:16] <stilldavid> who *wrote* this code
[16:17] <stilldavid> grrrrr
[16:17] <eroomde> you?
[16:17] <robacarp> uh...
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[16:17] <stilldavid> hehe, you're right
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[16:19] <robacarp> so whats this green circle around the balloon icon at about 15mi out?
[16:20] <eroomde> the horizon
[16:20] <eroomde> and therefore, who should be able to hear it assuming line of sight comms
[16:21] <robacarp> I can just barely hear noise ...but I'm about 10mi outside the horizon
[16:21] <robacarp> (as last reported)
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[16:25] <eroomde> i'd be interested to see if your hearing it correlates with when the radius passes over you
[16:26] <eroomde> obviously there's a lot of variation in antenna height above the ground and so on
[16:26] <NigeyS> no positions in a while :|
[16:26] <stilldavid> yeah, it's just sending the carrier now for some reason
[16:26] <stilldavid> :(
[16:26] <stilldavid> spot is updating now, though
[16:28] <stilldavid> still just carrier :(
[16:28] <stilldavid> how sad
[16:28] <stilldavid> won't know the burst altitude either
[16:29] <NigeyS> gps might kick back in, weve seen this a few times
[16:29] <stilldavid> I sure hope so
[16:29] <stilldavid> I kind of remember this happening last time, too
[16:29] <stilldavid> it came back after 20m or so
[16:29] <NigeyS> in fact i think buzz had a gps drop for a while
[16:29] <robacarp> stilldavid: I can hear the carrier for sure
[16:29] <stilldavid> robacarp: awesome
[16:30] <stilldavid> we're on 434.649
[16:30] <robacarp> yea, same
[16:31] <stilldavid> robacarp: have dl-fldigi all set up to upload stuffs?
[16:32] Action: robacarp downloads dl-fldigi
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[16:39] <stilldavid> thing is bookin' it
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[16:47] <stilldavid> I'm really sad the gps isn't updating.
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[16:47] <stilldavid> I spent too much time messing with it yesterday
[16:47] <robacarp> :/
[16:48] <stilldavid> oh well.
[16:48] <stilldavid> at least there's spot
[16:48] <NigeyS> still just a carrier ?
[16:48] <robacarp> I'm getting gibberish into dl-fldigi
[16:48] <stilldavid> yeah
[16:48] <NigeyS> hm
[16:49] <stilldavid> I'm sure it's the gps
[16:49] <NigeyS> which module ?
[16:50] <robacarp> stilldavid: you're on RTTY right?
[16:50] <stilldavid> gs407 based on ublox 5
[16:50] <stilldavid> yeah, 425hz shift 8N2
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[16:51] <stilldavid> the carrier is on the right in the waterfall
[16:52] <robacarp> Yea, I can see it.
[16:52] <robacarp> this is cool...
[16:52] <stilldavid> coo'
[16:54] <robacarp> I wish I could hear the radio too.... :/
[16:57] <robacarp> hmm... also not sure how to set 8N2 on this thing...
[17:05] <stilldavid> configure->modems
[17:05] <stilldavid> rtty
[17:05] <robacarp> yea, I got that far...but whats 8n2?
[17:05] <robacarp> in limon yet?
[17:05] <griffonbot> @apexhab: Apex Alpha Press Release! http://t.co/EPLtRtRM #apexhab #ukhas [http://twitter.com/apexhab/status/126705633926975488]
[17:06] <stilldavid> yeah, just got gas and headed south on 71
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[17:08] <robacarp> stilldavid: I'm out to longmont for 2hrs...good luck
[17:09] <stilldavid> thanks! was hoping you could track if it came back online :(
[17:09] <stilldavid> enjoy class!
[17:09] <robacarp> oh I will
[17:09] <robacarp> I'm going to leave the dl-fldigi online
[17:09] <stilldavid> cool
[17:10] <Upu> ping cuddykid
[17:10] <Upu> 60 secs to decide if you want 434.650 or 434.075
[17:10] <stilldavid> 650 GO GO GO
[17:10] <Upu> 650 it is decision made
[17:10] <stilldavid> :-D
[17:10] <NigeyS> lol
[17:10] <stilldavid> sorry cuddykid
[17:11] <Upu> how many conference stickers in his envelope ?
[17:12] <NigeyS> 2
[17:12] <Upu> got some left so everyone is getting one :)
[17:12] <Upu> 2 it is
[17:12] <griffonbot> @b3noxley: RT @apexhab: Apex Alpha Press Release! http://t.co/EPLtRtRM #apexhab #ukhas [http://twitter.com/b3noxley/status/126707403684188160]
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[17:13] <griffonbot> @danielsaul: RT @apexhab: Apex Alpha Press Release! http://t.co/EPLtRtRM #apexhab #ukhas [http://twitter.com/danielsaul/status/126707550828769280]
[17:13] <cuddykid> sorry Upu
[17:13] <cuddykid> yay! 650 is the one I wanted :D
[17:13] <Upu> too late now
[17:14] <Upu> thank stilldavid
[17:14] <stilldavid> I got your back,cuddykid
[17:14] <cuddykid> thanks stilldavid lol!
[17:14] <griffonbot> @stilldavid: Tracking another balloon that's in the air right now! Follow along on the spot page! #ukhas http://t.co/U6UbZJj5 [http://twitter.com/stilldavid/status/126707844065136640]
[17:14] <stilldavid> wow, that was fast.
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[17:56] <Lunar_Lander> hello
[17:59] <Lunar_Lander> hi mattltm NigeyS nosebleedKT fsphil-laptop rjharrison
[17:59] <fsphil-laptop> yoyoyo
[17:59] <fsphil-laptop> one for hibby, www.ebay.co.uk/itm/290404910750
[18:06] <stilldavid> phew on the ground, about 15 mi away
[18:06] <Lunar_Lander> yay
[18:07] <x-f> how do you know it has landed?
[18:08] <fsphil-laptop> two positions the same?
[18:09] <x-f> right
[18:09] <fsphil-laptop> that's not a bad distance
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[19:10] <Upu> is there any way to "free draw" on Eagle to fill bits in ?
[19:19] <eroomde> like a copper polygon pour?
[19:23] <Upu> no not really
[19:23] <Upu> just like a paint brush
[19:23] <Upu> I have 2 things that are very wierd and I cna't seem to get rid
[19:25] <Upu> http://imagebin.org/179910
[19:25] <Upu> the annoying one is that line in the bottom circle
[19:26] <Upu> dunno what it is, can't click it but if fails DRC
[19:26] <Lunar_Lander> hi Paradoxial daveake
[19:26] <robacarp> Upu: where are you running drc?
[19:26] <Upu> in Eagle
[19:28] <Upu> http://imagebin.org/179911
[19:29] <eroomde> oh that red bit isn't copper
[19:29] <eroomde> it's a little warning showing the overlap from each edge
[19:29] <eroomde> on the copper pour, right clip
[19:29] <eroomde> go to properties
[19:30] <eroomde> increase the clearence in the drop-down box
[19:30] <Upu> ah
[19:30] <Upu> thx
[19:32] <Upu> clearance = spacing ?
[19:32] <eroomde> possibly yes
[19:33] <Upu> hmm its draw spaces round all my vias now
[19:33] <Upu> its not meant to do that
[19:33] <Upu> but has fixed the problem
[19:33] <eroomde> gnd vias?
[19:34] Action: Upu gets his coat
[19:34] <eroomde> yep :)
[19:35] <Upu> owe you a pint..
[19:35] <eroomde> eagle has its quirks
[19:35] <fsphil-laptop> you do realise this means I'll be hassling you with newbie eagle questions now Upu :)
[19:35] <Upu> lol
[19:35] <Upu> blind leading the blind
[19:37] <Upu> ok final question
[19:37] <Upu> http://imagebin.org/179911
[19:37] <Upu> see on there over on the left there is a red part far left
[19:38] <Upu> and a red wire running up to the top, those are both GND
[19:38] <Upu> that blue bit doesn't need to be there
[19:38] <Upu> how can I fill it in ?
[19:38] <eroomde> i think so
[19:38] <eroomde> that's the same photos as before right?
[19:38] <Upu> let me do a better screen shot
[19:38] <Upu> 1 sec
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[19:39] <Upu> http://imagebin.org/179914
[19:39] <Upu> red bits
[19:40] <Upu> circled should all be connected really
[19:40] <Upu> no need for gaps
[19:40] <eroomde> are the gps anetnna signals 'gnd' or something different like 'rfgnd'?
[19:40] <Upu> GPS Ground
[19:41] <Upu> which connected to ground plane on the board
[19:41] <eroomde> also, tip for rf design: put lots and lots of vias connecting top and bottom layer gnd planes to each other around the antenna line
[19:41] <Upu> yeah going to do that now
[19:41] <eroomde> erm, well in your schematic perhaps just run a line from gps gnd to gnd
[19:42] <eroomde> it *should* then connect up when you ratsnest
[19:42] <Upu> it already is connected
[19:42] <Upu> on schematic
[19:42] <eroomde> loose the track
[19:43] <eroomde> in the upper right section underneath the module
[19:43] <eroomde> see if it sorts itself out
[19:43] <eroomde> but actually my hunch is that eagle is genuinely not thinking they're connected for some reason
[19:46] <Upu> well its connected them ok everywhere else ddly
[19:46] <Upu> oddly
[19:47] <Upu> actually
[19:47] <Upu> it hasn't
[19:47] <Upu> brb
[19:47] <eroomde> are the grounds underneath the gps isolated or def connected to gnd?
[19:47] <eroomde> hmm no that wouldn't do it?
[19:47] <Upu> something is up
[19:47] <Upu> not sure what
[19:47] <Upu> its not automatically connected them
[19:47] <Upu> I'll go work out whats up
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[19:51] <eroomde> i'd throw some gnd vias around the place to encourage it
[19:52] <eroomde> oh in the schematic double check that the gps gnd and gnd are actually connected
[19:52] <eroomde> sometimes the schematic editor will put a wire down but not actually join it
[19:52] <eroomde> very annoyingly
[19:53] <Upu> just started again...
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[19:56] <zyp> use the eye tool, check that both the polygon and the traces are on the same net
[19:58] <NigeyS> evening RocketBoy
[19:58] <zyp> or type «show gnd»
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[19:58] <RocketBoy> hey NigeyS - I was just about to ping you
[19:59] <NigeyS> oo oki
[19:59] <RocketBoy> been doing some foil balloon testing
[19:59] <NigeyS> ahh, some data? :D
[19:59] <RocketBoy> this time with differential pressure sensor MPX5010
[19:59] <RocketBoy> and a data logger
[19:59] <NigeyS> oh awsome, interesting results ?
[19:59] <fsphil-laptop> science!
[19:59] <RocketBoy> burst pressure is about 1psi
[20:00] <RocketBoy> also 60fps video
[20:00] <NigeyS> dam, thats a bit more than we thought isn it, we were thinking .7 ?
[20:00] <fsphil-laptop> is that a lot?
[20:00] <RocketBoy> yeah about 7Kpi acording to the sensor
[20:01] <NigeyS> more than expected phil
[20:02] <RocketBoy> measurement is not totally foolproof - as each time the gas goes in the instantaneous pressure goes up
[20:02] <NigeyS> yup, gonna be some variation there
[20:02] <Upu> Evening Steve, just missed your house off this one : http://ava.upuaut.net/files/IMG_6594_stitch.jpg :)
[20:02] <RocketBoy> also the pressure droops when stop filling
[20:02] <Upu> on this one though : http://ava.upuaut.net/files/IMG_6636_stitch.jpg somewhere...
[20:02] Action: Upu goes back to Eagle
[20:03] <RocketBoy> upu - yeah thats close though
[20:03] <NigeyS> you think its still worth putting this bmp085 inside picochu-3 ?
[20:03] <Laurenceb_> how consistent was the burst pressure?
[20:04] <RocketBoy> Laurenceb: whell I have only done 2 balloons
[20:04] <RocketBoy> (pockets arn't that deep that I can test 10)
[20:04] <NigeyS> diagnol rips steve, or seams ?
[20:04] <RocketBoy> seem so(sic)
[20:04] <RocketBoy> just lookin at the video
[20:05] <RocketBoy> the stretch is very obvious
[20:05] <NigeyS> oo, do upload it for me to take a looksie :D
[20:05] <NigeyS> i was thinking about measuring the stretch in flight
[20:05] <NigeyS> with a flex sensor ?
[20:05] <fsphil-laptop> how goes it stilldavid?
[20:05] <RocketBoy> just editiing it
[20:07] <RocketBoy> NigeyS - I was thinking of working it out from pressure - if you know the internal and external pressures and tempreture you can work out the volume change and hence stretch
[20:07] <robacarp> fsphil-laptop: last he heard he had a location on it. from stilldavid's SPOT it looks like its on the move again so he probably just picked it up.
[20:07] <NigeyS> oh right, well if that works lets stick with that
[20:08] <fsphil-laptop> robacarp, excellent. thanks!
[20:08] <RocketBoy> doh - thats a shame the rip was round the back of the balloon and not in view of the camera
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[20:09] <NigeyS> dam :(
[20:10] <NigeyS> good news is ive managed to figure out a way to get a camera on to the next launch, so itll be pointing directly up at the balloon stack
[20:10] <fsphil-laptop> you need a couple of those cameras eroomde uses
[20:10] <NigeyS> how long its battery lasts though, im not sure
[20:10] <NigeyS> high speed ?
[20:11] <fsphil-laptop> very yea, 600fps I think
[20:11] <fsphil-laptop> just under vga resolution
[20:11] <eroomde> 600fps!?
[20:11] <eroomde> tell me more
[20:11] <fsphil-laptop> ooh my memory failing me again?
[20:11] <NigeyS> 300 wasnt it ?
[20:11] <eroomde> oh sorry i misread
[20:11] <eroomde> wasn't being sarky
[20:11] <eroomde> 300 yup
[20:12] <NigeyS> are they still available ed ?
[20:12] <eroomde> ebay
[20:12] <NigeyS> ahh
[20:12] <fsphil-laptop> well I was only 200% out :)
[20:12] <NigeyS> lol
[20:12] <fsphil-laptop> 100% .. ah n/m.. gtk threading makes my mind mushy
[20:12] <eroomde> casio ex-f1
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[20:13] <fsphil-laptop> everything looks better in slow motion
[20:13] <NigeyS> didnt realise the proper cameras were £20k + mind
[20:13] <Laurenceb_> video uploaded? sorry pc died
[20:13] <eroomde> well its an interesting q
[20:13] Action: Upu winds up the bots hamsters
[20:13] <NigeyS> think he's still editing it laurenceb
[20:13] <Laurenceb_> i need more ram
[20:14] <fsphil-laptop> if you had a monitor that can play back at 300fps, it would look super smooth
[20:14] <eroomde> if you can find something >= 300fps, ~VGA, onboard storage, not too physically massive
[20:14] <NigeyS> ddr3 ?
[20:14] <Laurenceb_> firefox ate all my swap
[20:14] <Laurenceb_> i dont think so
[20:15] <eroomde> but yes, if you can find alternatives to the ex-f1, i'd love to know
[20:15] <eroomde> they're nice cameras but very fiddly
[20:16] <eroomde> if there was a 'proper' high speed camera with just an slr lens mount, that would be a wonder
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[20:18] <NigeyS> hmm jus looking at a few, 500, and 1000 but heh no price, guessing ALOT
[20:22] <natrium42> Alot? did you just call me? http://hyperboleandahalf.blogspot.com/2010/04/alot-is-better-than-you-at-everything.html
[20:23] <robacarp> natrium42: well played
[20:23] <RocketBoy> this shot is when the balloon is just nicely full http://imagebin.org/179928
[20:24] <RocketBoy> the frame before burst http://imagebin.org/179929 - notice its much bigger
[20:24] <NigeyS> blimey, never had 1 that full !
[20:24] <RocketBoy> (I hadn't appreciated the stretch)
[20:25] <NigeyS> its very noticeable
[20:26] <RocketBoy> post burst frame 1 http://imagebin.org/179930
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[20:27] <NigeyS> thats awsome
[20:27] <fsphil-laptop> I saw alot once
[20:27] <RocketBoy> frame 2 http://imagebin.org/179931
[20:27] <Upu> http://www.dpreview.com/news/1002/10022002samsungwb2000.asp 1000fps @ £329
[20:27] <fsphil-laptop> (great link natrium42, hadn't seen that before :)
[20:27] <jenny> Hello, I been recommended to come here to get advice about what GPS to get for a high altitude balloon project, what ones have people used before?
[20:28] <Upu> evening Jenny
[20:28] <RocketBoy> frame 3 http://imagebin.org/179932
[20:28] <NigeyS> thats a hell of a rip
[20:28] <Upu> http://ukhas.org.uk/guides:gps_modules
[20:28] <jenny> Hiya Upu
[20:28] <NigeyS> cant get over the stretch though, its alot more than id have thought
[20:28] <Upu> uBlox 6 is the newest one
[20:29] <Upu> http://ukhas.org.uk/guides:gpsbee
[20:29] <jenny> I didnt see that page! I will take a look
[20:29] <Upu> http://ukhas.org.uk/guides:falcom_fsa03
[20:29] <Upu> etc :)
[20:29] <RocketBoy> NigeyS: yeah seems to go from one side to the other and round a but further
[20:29] <NigeyS> yeah, looks like a pacman kinda shape.. without sounding to silly..
[20:30] <fsphil-laptop> I've seen latex bursts described as like pacman
[20:30] <NigeyS> see im not loopy after all hehe
[20:30] <eroomde> Upu: wow
[20:30] <eroomde> thanks
[20:30] <RocketBoy> the stretch thing makes me think dan might be right about the run away effect
[20:30] <Upu> Also jenny http://www.arhab.org/ has a page under "The Science" "GPS Pass > 60k"
[20:30] <NigeyS> certainly that video adds weight to it
[20:31] <jenny> Looks useful thankyou
[20:31] <NigeyS> did a bulge ever form in the ballon just before burst steve ?
[20:31] <Upu> Generally uBlox based modules seem to be flavour of the day are you in the US or UK ?
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[20:32] <Upu> Oh btw those of you who won NTX2's at the conference posting them out tommorrow
[20:32] <eroomde> uspect it might be 1000fps at tiny slit resoltuion
[20:33] <eroomde> like the ex-f1
[20:33] <jenny> Based in the UK
[20:33] <eroomde> the ex-f1 will do 1200 fps but it's a tiny resolution
[20:33] <RocketBoy> upu: cheers
[20:34] <Upu> ok jenny in that case uBlox modules are probably going to be easier to get, Inventek ISM300 is an older module that is rated for high altitude but the uBlox are generally better on all aspects
[20:34] <Upu> RocketBoy that address for you correct ? (See PM)
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[20:35] <jenny> Are GPS generaly easy to connect to an Arduino board?
[20:35] <Upu> yeah NMEA is serial data
[20:35] <RocketBoy> Upu: yep fine
[20:35] <Hiena> Serial ones, yes.
[20:35] <Upu> just watch the voltages
[20:35] <Upu> certain GPS chips run at 3.3v
[20:36] <RocketBoy> NigeyS: its about 10% diameter increase - so assuming uniform stretch in all dimensions thats a 33% volume increase
[20:36] <RocketBoy> at burst
[20:37] <NigeyS> wow that's a huge amount
[20:38] <jenny> Ive just read about the voltages on the guide you posted, so if the voltage of the GPS doesnt match that of the Arduino board you need to be careful?
[20:39] <RocketBoy> just looking at the data ab=gain I'm going to revise my burst pressure estimate to 0.8psi
[20:39] <NigeyS> jenny, only if ure transmitting TO the gps from the arduino, if you're just recieving data to parse through from the radio, you can use the arduino's 3.3v line without any problems
[20:39] <Upu> yeah Arduino runs at 5V so outgoing needs to be divided down
[20:39] <RocketBoy> cant you run them at 3.3V?
[20:40] <RocketBoy> or lower?
[20:40] <Upu> Arduinos ? You can run the ATMEGA at 3.3 I think
[20:40] <NigeyS> i run mine at 3.3
[20:40] <Upu> Arduino is 5V though ?
[20:40] <NigeyS> with 16mhz xtal
[20:40] <NigeyS> 3.3 and 5
[20:40] <eroomde> atmegas in general will go to 1.8V
[20:40] <robacarp> Upu: there are several arduino clones that run at 3.3
[20:40] <NigeyS> however all the tx from the arduino is done via the 5v
[20:40] <eroomde> at 4Mhz iirc
[20:41] <Upu> there's enough vias on this board to sink a ship
[20:41] <NigeyS> lol upu
[20:42] <jenny> So.. the Arduino UNO board has a 3.3v Pin, soo if the GPS runs a 3.3v, do i simply connect it to this pin?
[20:43] <NigeyS> that will do fine, just dont connect the TX pin from the arduino to the GPS RX pin, it'll send it at 5v and fry the gps :)
[20:43] <Upu> http://imagebin.org/179934
[20:44] <Upu> too many ?
[20:44] <NigeyS> haha upu thats a work of art
[20:44] <robacarp> jenny: NigeyS is correct. You'll need to change the serial signals back and forth between 5/3.3
[20:44] <Upu> just need a voltage divider ?
[20:45] <Lunar_Lander> hello jenny, may I ask if you are new?
[20:45] <NigeyS> yup divider, or logic level converter from SF would do it
[20:45] <jenny> Yes, I am new to this kind of thing
[20:45] <Lunar_Lander> ah
[20:45] <Upu> you at university or is this a private venture ?
[20:45] <Lunar_Lander> don't worry, I have started from 0 alos
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[20:46] <Lunar_Lander> *also
[20:47] <jenny> I am at university, and there is a group of use working on the project. I have found a computer scientist to assit with the programming of the board when we get that far
[20:47] <RocketBoy> NigeyS: I have also been testing ascent rate against fill and free lift
[20:47] <Upu> ok welcome aboard you're probably in the right place
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[20:47] <Upu> may I ask which university just out of interest ?
[20:48] <NigeyS> ahh, how are we looking with regards to the aim of 0.5m/s ?
[20:48] <jenny> University of Birmingham
[20:48] <NigeyS> but in saying that steve, fridays launch was about 1.1m/s and we were still climbing at 7.2k ...
[20:49] <Upu> so you're the electronics side of things ?
[20:49] <Upu> p.s I've just beaten the final boss on Eagle
[20:49] <jenny> Im working on the tracking system, soo alot of electronics yeah
[20:49] <Upu> thats not aimed at you jenny..
[20:50] <RocketBoy> e,g, for 30g of neck lift then the free lift should be about 1.5g to get 0.5m/sec
[20:50] <jenny> haha ok
[20:50] <Upu> ok well we have some godo information on the Wiki
[20:50] <Upu> good
[20:50] <RocketBoy> thats for a single balloon
[20:50] <NigeyS> interesting
[20:50] <Upu> subscribe to the mailing list and hang about here you'll pick up loads
[20:50] <Upu> even if it is people swearing at Eagle CAD and bursting mylar balloons for teh science
[20:51] <NigeyS> friday we had 45g of neck lift perballon .. i think 1 went slightly over at 47g
[20:51] <NigeyS> balloon*
[20:51] <Lunar_Lander> jenny : what exactly are the goals you want to achieve?
[20:51] <RocketBoy> as it gets more full it tahes more free lift to achivee the same ascent rate (obviously )
[20:52] <NigeyS> yup
[20:52] <fsphil-laptop> would visual observation of the foil balloon(s) in flight be of any use?
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[20:52] <RocketBoy> yes
[20:52] <RocketBoy> at burst particulary
[20:53] <NigeyS> RocketBoy, fingers crossed the battery lasts long enough in this camera
[20:53] <fsphil-laptop> I'm considering launching from a small mountain, I should be able to watch it for a big part of the flight
[20:53] <RocketBoy> to work out what the h*ll is happening
[20:53] <NigeyS> i cant add a bigger battery, im overweight as it is :/
[20:53] <fsphil-laptop> with a small telescope
[20:53] <NigeyS> hm a 114mm scope would do nicely
[20:53] <Lunar_Lander> if I may ask jenny
[20:54] <fsphil-laptop> it'll have to be a 50mm :)
[20:54] <fsphil-laptop> though this one isn't a goto scope
[20:54] <fsphil-laptop> hmm
[20:54] <NigeyS> goto wouldnt be much good, balloon would be moving to fast for it to keep up
[20:54] <fsphil-laptop> don't fancy sitting outside for a few hours on the side of a mountain in november
[20:54] <NigeyS> lol
[20:55] <fsphil-laptop> once it travelled a bit of distance its relative motion should be pretty small
[20:55] <fsphil-laptop> +s
[20:55] <fsphil-laptop> apparent motion even
[20:55] <Lunar_Lander> hey NigeyS
[20:56] <NigeyS> hey kev!
[20:56] <Upu> right thats the PCB sent for manufacture
[20:56] <fsphil-laptop> that was too quick Upu, and you're still sane. something went wrong!
[20:56] <Upu> lol
[20:56] <NigeyS> upu seedstudio ?
[20:57] <Lunar_Lander> jenny is gone
[20:57] <jenny> sorry still here
[20:57] <Upu> Look over the last 17 and 1/2 nights I've been working on Eagle to make a 1"x1" board with 6 wires on it I've come to love Eagle
[20:57] <Upu> probably just reading Lunar_Lander
[20:57] <NigeyS> lol ill remind you you said that 1 day upu ;)
[20:57] <Lunar_Lander> yeah she just replied :)
[20:57] <Lunar_Lander> Upu : do you use Eagle free?
[20:57] <Upu> Yes
[20:57] <Lunar_Lander> ah
[20:57] <Upu> NigelMoby Olimex
[20:57] <jenny> It is the first time the group has tried anything like this, soo we are trying to keep it fairly simple. Hope to get to around 100,000ft and take pictures
[20:58] <Lunar_Lander> yeah
[20:58] <Lunar_Lander> keeping it simple sounds good
[20:58] <Lunar_Lander> same here, photos, getting it back, also sensors+datalogging
[20:58] <Upu> should be too hard thats what I did, try avoid the landing in the sea part and you're good
[20:58] <Upu> shouldn't
[20:58] <Lunar_Lander> lol Upu yea
[20:58] <Upu> Olivers presentation...161Mb...
[20:58] <fsphil-laptop> and bring a chainsaw :)
[20:58] <jenny> Im working on the tracking so and trying to create a simple tracking device based around an arduino board and an NTX2 tranmitter with antenna, and have got a 4th year computer scientist help help me with the programming
[20:58] <Lunar_Lander> yeah
[20:58] <fsphil-laptop> Upu, 2.9gb :)
[20:59] <Lunar_Lander> xD
[20:59] <Lunar_Lander> jenny : did he work with arduino before?
[20:59] <Upu> there is a howto connect an NTX2 to an Arduino on the wiki
[20:59] <Lunar_Lander> yeah
[20:59] <Lunar_Lander> wait
[20:59] <Lunar_Lander> jenny : one moment
[20:59] <Upu> letting me down Lunar_Lander
[20:59] <Lunar_Lander> here: http://www.youtube.com/watch?v=K1qhdsRyKW0
[21:00] <Lunar_Lander> Upu : well, that video wouldn't be there without your tutorial
[21:00] <Lunar_Lander> :)
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[21:01] <jenny> And im not too sure if he has prgrammed an arduino before, but he says he is experiance in a number of programming lanuages, which is not experiance than i have
[21:02] <Upu> Arduino is farily easy to get to grips with
[21:02] <stilldavid> just recovered ki6ymz-3 in a field!
[21:03] <NigeyS> yey nice 1 stilldavid
[21:03] <stilldavid> in case you were still wondering...
[21:03] <NigeyS> gps ?
[21:03] <NigeyS> didnt come loose or anything ?
[21:03] <jenny> Ive seen to guide how to connect the NTX2 to the arduino and and just working out the GPS now, what one to purchase and how to to connect it
[21:03] <stilldavid> nope. still velcroed and had power
[21:03] <fsphil-laptop> good news stilldavid !
[21:03] <NigeyS> very odd
[21:03] <stilldavid> will have to do a post mortem
[21:03] <NigeyS> but congrats on the recovery
[21:03] <stilldavid> both gopros recorded the whole thing, have high hopes for the video
[21:04] <NigeyS> awsome!
[21:04] <stilldavid> alright, spotty coverage. will have video up tomorrow or next day.
[21:04] <stilldavid> wheee!
[21:04] <NigeyS> schweet!
[21:05] <robacarp> stilldavid: finally...
[21:07] <stilldavid> robacarp: tell me about it, man.
[21:07] <robacarp> :D
[21:07] <robacarp> I've been watching your carrier on my screen for like 6 hours.
[21:07] <NigeyS> lol
[21:10] <stilldavid> OH YEAH
[21:10] <stilldavid> great pop
[21:10] <stilldavid> oh man
[21:10] <stilldavid> it's great
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[21:12] <jenny> A quick question about the GPS again, if the GPS runs at 3.3v i can connect it to the 3.3v pin on the board, and then the software serial pin? on the board not the TX, as i only want to transfer data from the GPS to the board this is fine?? Sorry if it is not worded well!
[21:14] <NigeyS> jenny, there is a hardware serial port on the arduino should be labeled rx0 and tx0, you want to have the gps tx pin to connect to the arduino rx0 pin
[21:14] <NigeyS> leave the gps rx pin totally disconnected
[21:16] <DanielRichman> some gps rx pins require a pull up or down
[21:16] <jenny> ok
[21:16] <DanielRichman> I believe the lassen iq spec wants one
[21:16] <NigeyS> yup, lassen needs 1, cant remember the value off hand
[21:17] <jenny> What do you mean by pull up or down? and is there a GPS that is simple to use?
[21:18] <DanielRichman> if it's not pulled and there is no internal pull up then the pin will be left floating
[21:18] <DanielRichman> meaning that it will randomly be a zero or one; so the gps receives garbage
[21:18] <DanielRichman> which could do bad things/confuse it/mess it up
[21:18] <DanielRichman> unintentionally create commands, etc.
[21:19] <griffonbot> Received email: Anthony Stirk "Re: [UKHAS] uBlox 6 Breakout"
[21:20] <eroomde> 10k pullup
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[21:24] <Lunar_Lander> jenny : I can tell you that the SkyTraq Venus seems to be not so good
[21:24] <robacarp> Lunar_Lander: what makes you say that?
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[21:25] <Lunar_Lander> well I mean mine didn't work up to now
[21:25] <Lunar_Lander> may be that mine is broken
[21:25] <eroomde> we've used the skytrac venus successfully
[21:25] <eroomde> you need to get the ones that are good for high altitude
[21:25] <eroomde> they don't have as good a dynamic perofrmance as ublox
[21:25] <robacarp> I've used the venus successfully
[21:26] <Lunar_Lander> ah OK
[21:26] <Lunar_Lander> maybe mine is just faulty?
[21:26] <Lunar_Lander> eroomde : do you know if the Sparkfun breakout for it has the correct chip?
[21:26] <eroomde> did you solder it yourself
[21:26] <eroomde> i got through about 3 by overheating them when soldering
[21:27] <eroomde> Lunar_Lander: not sure about the sparkfun one
[21:27] <Lunar_Lander> yeah I just got their breakout
[21:28] <Lunar_Lander> and even with the antenna seeing the sky, it gets only two sats and no lock
[21:29] <eroomde> we got very good locks
[21:29] <eroomde> inside
[21:29] <eroomde> you might have just got a dud
[21:30] <eroomde> but as i say, their dynamic performance was not nearly as good as the ublox
[21:31] <Lunar_Lander> yeah
[21:31] <Lunar_Lander> is the GPSBee good? it has a ublox
[21:31] <eroomde> guess it must be then
[21:31] <Lunar_Lander> yea
[21:32] <griffonbot> Received email: "Re: [UKHAS] uBlox 6 Breakout"
[21:37] <eroomde> right g'night
[21:38] <Lunar_Lander> gn8 eroomde
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[21:52] <Paradoxial> Hi lunar
[21:53] <Paradoxial> Lunar_Lander: *
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[22:00] <Lunar_Lander> hi Paradoxial
[22:00] <Lunar_Lander> I hope you are good?
[22:00] <Paradoxial> Yeah, wbu?
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[22:02] <Lunar_Lander> same here
[22:02] <Lunar_Lander> just have to shut down in a few moments as uni will be there tomorrow
[22:07] <Lunar_Lander> good night :)
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[22:15] <Laurenceb_> eroomde: does FASTSEEK help speed up SD cards with fatFS?
[22:15] <Laurenceb_> or does using lseek to the maximum file size work faster?
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[22:17] <Laurenceb_> https://github.com/Laurenceb/Dactyl/blob/master/main.c#L364
[22:21] <Laurenceb_> bbl
[22:25] <Upu> Hey rjharrison
[22:25] <Upu> Man Lab new series
[22:25] <Upu> next Tuesday 20:00
[22:25] <Upu> http://www.bbc.co.uk/programmes/b016mz66
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[22:30] <griffonbot> @AnthonyStirk: James May's Man Lab, Series 2 starts this Tuesday watch out for appearances by rjharrison & Rocketboy @G8KHW in coming episodes #ukhas [http://twitter.com/AnthonyStirk/status/126787206248538112]
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[22:49] <NigeyS> wb steve
[22:49] <NigeyS> hey juxta :D
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[23:51] <Alan_> Anyone using http://habhub.org/predict/ for launches in North America?
[23:51] <nickolai> I am
[23:52] <nickolai> Using the burst calculator too, and I just noticed that gravity has no effect on my ascent rate :)
[23:53] <nickolai> do u have a question Alan_?
[23:53] <Alan_> Great to hear Nickolai as I am comparing the results using EOS BalTrak but CU does not indicate where they are querying WX and FD and upper winds data
[23:53] <nickolai> do you need data from actual flights?
[23:54] <Alan_> We are preparing for a flight on Oct 28 above 120k feet using a 3000g Kamont
[23:57] <nickolai> 3000g, wow!
[23:58] <nickolai> I'm preparing a flight this weekend with a 1000g
[23:58] <nickolai> targetting ~31km
[23:58] <nickolai> although weather forecast doesn't look good, I think I'll have to move it to next weekend
[23:58] <nickolai> assuming my flight goes well i'd happily share the data with you if you'd like
[23:59] <nickolai> from where are you launching?
[23:59] <Alan_> Here is the web site showing last fall's 100+ using as 1500g http://shsballoonproject.pbworks.com/w/page/7672410/SHARP%20-%20Shaftesbury%20High%20Altitude%20Robotics%20Project
[00:00] --- Thu Oct 20 2011