highaltitude.log.20110712

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[02:03] <griffonbot> Received email: daveake "[UKHAS] Re: UKHAS Conference 2011"
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[04:45] <rjharrison> wow quite alot of people hanging out
[04:46] <rjharrison> juxta, natrium42 hope all is well. There will be a school launch tomorrow @ ~09:30 BST
[04:47] <rjharrison> There may well be some dummy data coming through on the tracker today
[04:47] <SpeedEvil> Is that in 4 or 28 hours?
[04:50] <rjharrison> oh sorry iain it's in 24 hours ish
[04:50] <rjharrison> well 28
[04:50] <rjharrison> :-)
[04:50] <SpeedEvil> :)
[04:50] <SpeedEvil> Not properly awake.
[04:50] <SpeedEvil> Unsure if I'm going back to sleep or not.
[04:51] <rjharrison> Yep I'm just coming too
[05:05] <rjharrison> any one know if there is a filter on call signs for the tracker
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[05:38] <rjharrison> natrium42 please can we set the tracker for Boston Spa School - Launch 2 Infinity 2011
[05:38] <rjharrison> And if possible have a clear down of the data
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[05:50] <Upu> morning
[05:57] <mattltm> morning Upu :0
[05:57] <Upu> hey there
[05:57] <mattltm> Hows it going?
[05:58] <Upu> very well thx
[05:58] <Upu> might leave the rig going today
[05:58] <mattltm> cool. Much to look forward to today?
[05:58] <Upu> launch tommorrow ?
[05:58] <mattltm> Whos?
[05:58] <Upu> Boston Spa School - Launch 2 Infinity 2011
[05:59] <mattltm> Ahh, Op' North
[05:59] <Upu> indeed :)
[05:59] <Upu> very close to me actually
[05:59] <mattltm> Nice.
[06:00] <mattltm> Well I guess I best get ready to go to work :(
[06:00] <Upu> yeah thats what I'm doing
[06:01] <mattltm> Got 24K worht of Cisco router being installed today.
[06:01] <mattltm> Need to do it without taking the DC offline. Thats going to be fun!
[06:01] <Upu> yeah they can be expensive :)
[06:01] <Upu> I saw Metronet UK's 1/2 million £ set up last week
[06:02] <mattltm> Lol. expensive aint the word!
[06:02] <mattltm> Upu: Very nice.
[06:02] <mattltm> Our DC was £1.2M
[06:02] <mattltm> Initial build from a bare room
[06:02] <Upu> whats the company name ?
[06:03] <mattltm> http://www.innovationcentremedway.co.uk/
[06:03] <Upu> ah managed offices ?
[06:04] <mattltm> Yup, with an N+1 DC slap bang in the middle
[06:04] <mattltm> We dont actualy sell the DC outside of the building but we have a tenant who does.
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[06:05] <Upu> very nice
[06:05] <Upu> morning jcoxon
[06:05] <jcoxon> morning Upu
[06:05] <Upu> [06:38] <rjharrison> natrium42 please can we set the tracker for Boston Spa School - Launch 2 Infinity 2011
[06:05] <Upu> [06:38] <rjharrison> And if possible have a clear down of the data
[06:05] <mattltm> Hi James
[06:05] <Upu> dunno if you can do that, need a list of people who can do what :)
[06:06] <jcoxon> yeah i can do it
[06:06] <jcoxon> when is the launch?
[06:06] <Upu> tommorrow
[06:06] <Upu> 0930 UTC ~
[06:06] <Upu> assuming its infinity in the tracker
[06:08] <jcoxon> done
[06:08] <jcoxon> rob does have the password though :-s
[06:08] <Upu> well ... :)
[06:08] Action: jcoxon sets up for another test for pico
[06:09] <Upu> dates wrong its tommorrow
[06:09] <Upu> not that its urgent
[06:09] <Upu> how long did the batteries last ?
[06:10] <jcoxon> well it was still running when i went to bed at 11
[06:10] <jcoxon> but it wasn't alive when i woke up
[06:10] <jcoxon> well it was alive but had reset suggesting a period of off
[06:10] <Upu> so what was the total "uptime" ?
[06:10] <jcoxon> grrr rain forecast today - better move it inside before work
[06:11] <jcoxon> at least 15 hours
[06:11] <jcoxon> but i suspect it would have done a few more
[06:11] <Upu> sound good - so when are you launching ? :)
[06:12] <jcoxon> well i want to get it to survive the night
[06:12] <jcoxon> even in a low power mode
[06:12] <jcoxon> my latest revison of the code should hlep
[06:12] <jcoxon> help*
[06:12] <jcoxon> and need to optimise the gps part - its only sending position every 10minutes
[06:12] <jcoxon> which isn't really enough
[06:13] <jcoxon> possibly next week though
[06:13] <Upu> busy month for launches
[06:19] <Upu> ok work bbl
[06:21] <mattltm> Yup same here. Work time.
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[06:58] <jcoxon> hey rjharrison
[06:58] <jcoxon> i've made those changes
[06:58] <rjharrison> Hi james
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[06:58] <rjharrison> thanks
[06:58] <jcoxon> did you know that you can filter using the url
[06:58] <rjharrison> Spoke with DM @ caa and he's confirmed notam for one launch during the rest of the month
[06:59] <jcoxon> e.g. http://spacenear.us/tracker/?vehicle=infinity
[06:59] <rjharrison> Thanks
[06:59] <rjharrison> Did steve tell you about the James May launch we're doing at the end of the month?
[06:59] <jcoxon> nope
[07:00] <jcoxon> anything special onboard?
[07:05] <staylo> James May
[07:19] <Elwell> so whole payload painted beige and wearing corduroys?
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[07:33] <Upu> morning rjharrison
[07:38] <rjharrison> Hey Upu
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[07:41] <Upu> I bet I can pick that up on the ground from my home
[07:41] <rjharrison> hehe I bet you can
[07:41] <rjharrison> It's going to be close
[07:42] <Upu> listening in anyway
[07:43] <rjharrison> Great I have set up infinity as the call sign and updated the listener
[07:43] <Upu> James May's plane registration number is G-OCOK
[07:43] <rjharrison> hehe how do you know that
[07:44] <Upu> read it somewhere, he got it becuase he likes saying oh cock on the TV alot
[07:44] <Upu> http://www.abpic.co.uk/photo/1133855/
[07:46] <rjharrison> lol
[07:46] <rjharrison> Cool pic
[07:50] <Upu> can't see anything on the notam info site for this launch tommorrow
[07:51] <rjharrison> I confirmed it DM yeasterday
[07:52] <Upu> ok
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[08:23] <russss> ah I didn't see these http://questforstars.com/wp-content/gallery/stratoshuttle-1/go-at-throttle-up.jpg
[08:23] <russss> they've done pretty well at reproducibility
[08:23] <russss> this one is crazy http://questforstars.com/wp-content/gallery/stratoshuttle-1/shuttle-trail-decay.jpg
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[08:40] <Upu> those pictures are great russss
[08:45] <SamSilver> if you zoom in on the last pic there is a bright speck near the swooping trail the big one on the left
[08:48] <SamSilver> my teacher learnt me funny english!! anyone else see the bright speck?
[08:50] <SamSilver> aah!! it is in the first pic as well though not as easy to see.
[08:52] <SamSilver> afk
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[09:17] <mixio_citizen> I just bought a parachute swivel and a 2mm static cord
[09:17] <mixio_citizen> http://slaros.blogspot.com/2011/07/anti-spin-solution-parachute-swivel.html
[09:20] <fsphil> morning all
[09:26] <mixio_citizen> hi :)
[09:30] <Elwell> http://www.meas-spec.com/downloads/MS5611-01BA01.pdf and http://embeddedadventures.com/shopdetails/pid/106 look interesting
[09:34] <Upu> thats a good idea mixio_citizen
[09:34] <Upu> I could get one of those from an old dog lead :)
[09:37] <mixio_citizen> upu i took them from a fishing shop
[09:37] <mixio_citizen> :)
[09:39] <mixio_citizen> I was lauging when i went into the shop. I said i need those things to drop a capsule on stratoshere. The guy looked at me strange and said we got fishing tools here.
[09:39] <mixio_citizen> :P
[09:39] <mixio_citizen> I said your fishing stuff is ok for space travel too :)
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[09:41] <mixio_citizen> http://www.networkworld.com/community/blog/billion-pixel-camera-set-snap-milky-way-shots
[09:49] <fsphil> it's interesting how much habing, amateur radio and fishing overlap.
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[09:50] <mixio_citizen> :)
[09:53] Action: fsphil is on holiday today
[09:53] <fsphil> shame that launch isn't today
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[10:08] <daveake_> I've uploaded 4 videos from CLOUD1's onboard camcorder - the launch, fup at about 98,000 feet, the burst and initial fall, and the landing.
[10:08] <daveake_> http://www.youtube.com/choccydonuts
[10:09] <daveake_> Sorry about the annoying whistle, but I decided to wire the piezo bleeper to its own battery for the flight, rather than add the code at the last minute to switch it on when it lands.
[10:11] <fsphil> lol, love the cheers at launch
[10:11] <daveake_> Ah, yes, I should explain ....
[10:12] <daveake_> ... I had 6 helpers who stayed on for the chase, plus another 10-ish along to watch the launch. You can hear that lot cheer and clap as I launched.
[10:13] <daveake_> After that you can hear all the teams from the cricket tournament who we shared the field with!
[10:22] <fsphil> love the smooth motion of it once it's up really high
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[10:37] <fsphil> did I just hear a phone ringing?
[10:39] <fsphil> (on the descent video)
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[10:44] <fsphil> did too -- at 1:30
[10:50] <mattltm> lol. Bring Bring! Erm hello?
[10:53] <daveake_> fsphil - no, I didn't put the phone in (was going to but ran out of memory in the Arduino when I added the code to talk to it)
[10:53] <jgrahamc> Love it daveake_
[10:53] <daveake_> I had a small Buzz Lightyear on board. Sounded like he was grunting a couple of times. I would have too with that motion LOL
[10:54] <daveake_> Oh, and why am I daveake_ not daveake? Don't think I typed it ...
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[10:55] <daveake_> mattlm LOL
[10:56] <daveake_> Reminds me of the reply I got from Kodak re the camcorder I used. It didn't like Lithiums so I thought I'd run on external cells in series connected to the DC IN socket
[10:56] <daveake_> So I asked them what the max and min DC IN voltages were
[10:57] <daveake_> I explained this was for a weather balloon going to about 100,000 feet
[10:57] <daveake_> The reply was "you should purchase the Kodak mains adapter and connect to the nearest mains socket" LMAO
[10:58] <Elwell> daveake_: yeah, but it makes recovery simpler -- just follow the cable
[11:00] <daveake_> LOL. Do they sell such cables in B&Q?
[11:01] <Elwell> oooh. tanker refilling the small tank in carpark
[11:02] <Elwell> wonder if its argon or helium (one of these days I'll read the label)
[11:07] <Elwell> http://www.flickr.com/photos/elwell/5929393517
[11:10] <fsphil> that's garbage
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[11:14] <fsphil> well, garbaga
[11:16] <Elwell> or carba even :-)
[11:16] <Elwell> carba gas
[11:17] <jgrahamc> I'm guessing it's carbonite :-)
[11:17] <fsphil> ooooooooooooooh http://www.flickr.com/photos/elwell/5707603520/in/photostream
[11:18] <Elwell> were nesting in rollershutter above window
[11:18] <fsphil> hehe, blue tits have a habit of nesting in weird places
[11:19] <fsphil> I always think the chicks look really grumpy
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[11:46] <WillDuckworth> cuddykid, do you think you'll be back off hols by sat 30th?
[11:47] <cuddykid> yeah, back on 27th I think :)
[11:47] <cuddykid> will be great if you could launch after, but if winds are good the sat before, launch!
[11:47] <WillDuckworth> cool - might need your patent balloon filling rig - fingers crossed
[11:47] <cuddykid> haha, yeah!
[11:47] <WillDuckworth> and your back garden tracking ability!
[11:48] <cuddykid> lol yeah
[11:48] <cuddykid> I was surprised how well the balloon filler worked!
[11:49] <cuddykid> managed to go from having a few kb of free space on my HD to 20gb of free space - that should do me for a few weeks!
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[12:09] <griffonbot> Received email: daveake "[UKHAS] CLOUD1 photos and videos"
[12:10] <cuddykid> 2 easyradio advanced just arrived in post - kindly donated by LPRS!
[12:18] <daveake_> nice :-)
[12:19] <cuddykid> they've been very helpful :)
[12:19] <daveake_> I have some and had a play ages ago
[12:19] <daveake_> This was for a different project. The rep came round to show me the stuff.
[12:20] <cuddykid> oh cool!
[12:20] <daveake_> These weren't the "advanced" ones - what have they added?
[12:21] <cuddykid> I think they're slightly better performance - I need to have a double check - checked a while ago, and I think they were a fair bit better than the others
[12:23] <daveake_> What do you want to do with them?
[12:23] <cuddykid> got a transmitter & transceiver - so was going to have a go at seeing how far up and uplink will work
[12:23] <cuddykid> *an uplink
[12:23] <Upu> hey
[12:23] <Upu> http://ava.upuaut.net/ukhastv/Untitled-1.html
[12:23] <Upu> can you click that
[12:23] <Upu> 1 or 2 of you
[12:24] <Upu> pls
[12:24] <cuddykid> yep, nothing there though Upu
[12:24] <Upu> not a virus :)
[12:24] <cuddykid> lol
[12:24] <cuddykid> oh no
[12:24] <Upu> give it a sec
[12:24] <cuddykid> my bad, yep!
[12:24] <cuddykid> see the radio :)
[12:24] <daveake_> ooer
[12:24] <cuddykid> live stream
[12:24] <daveake_> 'cor it's like being there :-)
[12:25] <Darkside> whats this?
[12:25] <Upu> its me testing live streaming for UKHAS conference
[12:25] <daveake_> no sound though LOL
[12:25] <Darkside> ooo
[12:25] <Upu> I turned it off
[12:25] <daveake_> :)
[12:25] <Darkside> link no loading here
[12:25] <Darkside> oh wait
[12:25] <Upu> I have a Adobe Media Streaming Server here on a 10Mb leased line
[12:25] <Darkside> nnow i see your FT817
[12:25] <Upu> my PC at home is upload to it
[12:26] <Upu> and you all connect in
[12:26] <Darkside> change the frequency!
[12:26] <Darkside> that is not right for HAB
[12:26] <Darkside> well, maybe for some
[12:26] <daveake_> We need remote control of your receiver :)
[12:26] <Upu> ah well
[12:26] <Upu> you can actually get that
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[12:27] <daveake_> Yeah, I have a webcam at home looking at the nice car :-). Can steer that X-Y
[12:27] <daveake_> The webcam, not the car LOL
[12:27] <Upu> I do have the audio streaming
[12:27] <Upu> as well
[12:28] <Randomskk> anyone have payload conf stuff for infinity/icarus payloads?
[12:29] <Upu> let me see if I can stream something more interesting
[12:29] <Upu> how do you mean Randomskk ?
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[12:38] <WillDuckworth> hey cuddykid - got a new balloon (ordered?) yet?
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[12:40] <cuddykid> Hi WillDuckworth - not yet, need to get one on order aSAP!
[12:41] <cuddykid> I was thinking about ordering 4 hwoyees direct - but the reduced cost is neglible
[12:41] <cuddykid> Will contact RocketBoy and see what he can do :)
[12:42] <WillDuckworth> stock looking low :( http://randomsolutions.co.uk/Random_Aerospace/Balloons.html
[12:42] <Randomskk> Upu: to add his payloads to habitat we need a flgith doc
[12:42] <WillDuckworth> if you do get one then i reckon a double launch could be on....
[12:43] <cuddykid> WillDuckworth: at the bottom - it says Hwoyees received on 7th! So hopefully
[12:44] <cuddykid> but - payload isn't ready yet (and doubt if I can get it ready in about 3 days) :(
[12:44] <WillDuckworth> ooo fingers crossed eh
[12:44] <cuddykid> now I've got these other radios, I'm going to try and set up uplink :D
[12:44] <cuddykid> If not a double, means more days of fun!! lol
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[12:52] <jgrahamc> I'd be surprised if you get much of an uplink at any level of altitude cuddykid
[12:53] <jgrahamc> Unless you are going to fly a gyro-stabilized Yagi that's pointing in the right direction :-)
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[12:53] <m0jsn> uplink is certainly possible at altitude, why wouldn't it work jgrahamc?
[12:53] <fsphil> getting there: http://i.imgur.com/2PxSL.png
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[12:54] <Darkside> jgrahamc: it would certainly work
[12:54] <m0jsn> looks good fsphil
[12:54] <m0jsn> :)
[12:54] <jgrahamc> I stand corrected.
[12:55] <Darkside> you'd just need to work on a different frequency to the telemetry
[12:55] <jgrahamc> I was assuming that using those tiny easyRadio modules you'd not manage to uplink using 10mW
[12:55] <m0jsn> oh you won't
[12:55] <Darkside> ahh
[12:55] <Darkside> yeah nah
[12:55] <Darkside> you'd want a good few watts on the ground, ideally into a yagi
[12:55] <m0jsn> yep
[12:56] <m0jsn> see graph at the bottom of http://www.srcf.ucam.org/~cuspaceflight/wiki/doku.php?id=nova_14
[12:56] <jgrahamc> cuddykid was talking about using two easyRadio modules for the uplink.
[12:56] <jgrahamc> Agree that a good transmitter on the ground + Yagi would be fine.
[12:56] <m0jsn> oh I see
[12:56] <Darkside> it would work if you had lots of processing power on the payload
[12:56] <Darkside> i.e. could demodulate RTTY just like we do on the ground
[12:57] <Darkside> if you wanted to make use of an existing demodulation solution (like the NRX modules), you'd need more power on the ground
[12:57] <m0jsn> we used an OOK demodulator on apex II on the balloon
[12:57] <fsphil> I think rtty could be done fairly simply, with the nrx2
[12:57] <Darkside> fsphil: i've been meaning to get a NRX to play with
[12:57] <jgrahamc> I would have thought that a microcontroller would have no trouble demodulating 50baud RTTY
[12:58] <Darkside> jgrahamc: i wouldn't do the demodulation in the micro
[12:58] <Darkside> i'd use an external PLL
[12:59] <daveake_> In testing I had NTX2 --> NRX2 --> Frequency Generator --> dl-fldigi. This was before I had a receiver. That worked fine.
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[12:59] <Darkside> oh nice
[13:00] <daveake_> I wanted to check I was Txing OK
[13:00] <Darkside> would be interesting to fly a NRX and do some fast sampling of the output on an analog input pin
[13:00] <daveake_> Actually I was 5% out on timing but it worked anyway
[13:01] <Darkside> i'd sample the RSSI voltage too
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[13:01] <daveake_> Yep, that would help find out how it's doing
[13:01] <Darkside> could just buffer samples and stream them to a SD card
[13:01] <Darkside> some interesting data to look at
[13:01] <daveake_> Then play back as a WAV into dl-fldigi ;-)
[13:01] <Darkside> well that wouldn't work
[13:01] <daveake_> Sorry no
[13:02] <Darkside> depends what you send i guess
[13:02] <daveake_> Need to generate the notes
[13:02] <daveake_> Like my freq gen
[13:02] <Darkside> if you send AFSK from the ground, it would work
[13:02] <Darkside> i.e. FSK modulated on top of FM
[13:02] <Darkside> but just sending RTTY on the groun wouldn't work
[13:02] <Darkside> you'd see something like a square wave
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[13:29] <daveake_> Darkside - not quite sure I'm understanding here. Maybe we're not talking about the same thing. NTX2 --> NRX2 simply takes the voltage fed to the NTX2 and feeds it out (at a lower level IIRC) out of the NRX2. So the shape of the waveform you send gets copied over the link. So if you send RTTY you receive RTTY, and it should just need puttnig through a comparator to give a square wave to poke into a UART. Am I being too s
[13:31] <Darkside> nah thts right
[13:31] <fsphil> you're basically feeding the NTX2 with a square wave, that's what you get out of the NRX2
[13:32] <daveake_> Thought so, 'cos that's another thing I did in testing :)
[13:33] <fsphil> you could feed the ntx2 with an audio signal too
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[13:34] <fsphil> HAB pirate radio :)
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[13:36] <daveake_> LOL
[13:36] <fsphil> that would really please ofcom
[13:37] <daveake_> Hmmm ... next time, put random audio messages in the gaps between packets ... LOL
[13:37] <fsphil> I'd like to make an audio repeater using an ntx2
[13:37] <daveake_> warble warble warble "Blimey it's high up here" warble warble warble ...
[13:38] <Darkside> warble warble warble SPAAAAAAAAAAAAAAAAAAAAACE warble warble
[13:39] <jgrahamc> Actually, I considered having GAGA-1 speak altitude while flying.
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[13:40] <Elwell> 'I can see the pub from here'
[13:43] <daveake_> LOL
[13:43] <daveake_> "I'm getting giddy"
[13:44] <fsphil> "Ah crap, I forgot to pad out the coordinates. I'm lost!"
[13:45] Action: fsphil presses the "Board" button in eagle and strange things happen
[13:45] <SamSilver> done in a helium voice lol
[13:45] <jgrahamc> Actually, the original idea was that I'd record video and have a voice reading out altitude so that it could be heard on the video. Perhaps I'll do that on babygaga.
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[13:59] <m0jsn> babygaga, haha
[13:59] <m0jsn> like it
[14:00] <jgrahamc> Yes, that's the name for GAGA-2 and the goal is to be as small as possible
[14:01] <jgrahamc> Going for altitude.
[14:02] <m0jsn> Good stuff
[14:03] <daveake_> helium voice LOL
[14:03] <m0jsn> when are you launching it?
[14:04] <jgrahamc> Who knows. I spent months on GAGA-1 because of family commitments. I expect babygaga will also take months because I'm going a bunch of experimenting with expanding foam to mold my own capsule.
[14:05] <jgrahamc> http://blog.jgc.org/search/label/babygaga
[14:05] <daveake_> Question about tracking ... if I put an aerial up on the house and run down into my AR8000 to help track other people's payloads, what sort of distance can I expect that to work to? Would it be worth getting a Yagi and maybe steering it?
[14:07] <daveake_> jgrahamc .. I like that :-). Maybe I should make an Apollo replica using a mould? ;-)
[14:07] <jgrahamc> Next experiments are using a party balloon as a mold and then a papier maché mold made from a rugby ball.
[14:07] <daveake_> :D
[14:08] <jgrahamc> Payload will use an Arduino Pro and the GAGA-1 flight computer board. No GSM backup.
[14:09] <jgrahamc> No still camera, but will use 'spy' video camera. I'm hoping I can film the balloon burst and the parachute open.
[14:09] <daveake_> I can't exactly re-use CLOUD1's capsule ....
[14:09] <daveake_> There's at least one YT video showing the balloon burst. Very pretty. I was thinking about trying that next time;
[14:10] <jgrahamc> I could just reuse GAGA-1's capsule, but I want small and high this time.
[14:10] <jgrahamc> Well, at least higher. I did get 32,086m with GAGA-1
[14:11] <jgrahamc> Also, my daughter got to launch GAGA-1 and I think my son would get a kick out of doing another flight.
[14:11] <jgrahamc> He's 3 and mentions "balloon. skies." every other day.
[14:12] <daveake_> LOL
[14:13] <fsphil> daveake_, depends on the antenna, coax used and the sensitivity of the receiver :)
[14:13] <daveake_> Yeah, I know that part ............. :-)
[14:13] <jgrahamc> When I was tracking your flight daveake_ I was just using a 5 element Yagi from my bedroom. I've tracked others using the same Yagi and my FT790R.
[14:14] <daveake_> ....... just wondering if I should just stick a uni-directional aerial up there and see how I get on, or use a Yagi straightaway
[14:14] <daveake_> Ah, OK, if a Yagi indoors works well then I'll do that
[14:14] <fsphil> I'm using a colinear (vertical) and it seems to work well over silly range
[14:14] <fsphil> a yagi will always be better though :)
[14:14] <daveake_> I thought we had a leak. The balloon inflated much quicker than I thought, then we had issues with the transmitter (we thought) so the balloon sat there for a while before it was needed. It looked like it deflated a bit in the 30 mins.
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[14:14] <daveake_> OK, I'll try next flight I can.
[14:15] <fsphil> this is with an FT817, but I suspect the AR8000 will be as good
[14:15] <daveake_> I guess the filler had a very slight leak. Anyway, to be sure, I over-inflated a bit.
[14:15] <daveake_> I was impressed how well it worked in a car with a magmount
[14:16] <SamSilver> jgrahamc: my wife "caught" me watching a video of a guy pounding foam with a big hammer and said "Well at least it is not porn but it just as worrying!!"
[14:17] <daveake_> LMAO
[14:17] <fsphil> coincidently the 70cm contest is tonight
[14:17] <fsphil> lol
[14:17] <daveake_> So who was the furthest away tracking CLOUD1?
[14:17] <jgrahamc> You well, SamSilver, imagine how my wife felt when she found out about me posting that video.
[14:17] <fsphil> either me or dutch-mill I suspect
[14:18] <jgrahamc> Definitely not me. CLOUD1 was coming straight at me.
[14:18] <daveake_> I thought it would be one of you ... can I guess that dutch-mill is somewhere in Holland? ;-)
[14:19] <jgrahamc> SamSilver: did you show her my video of ladybirds mating to the Benny Hill soundtrack?
[14:19] <fsphil> indeed :)
[14:19] <daveake_> fsphil - Whereabouts are you in NI?
[14:20] <jgrahamc> fsphil did a nice job on GAGA-1 of tracking from bloody miles away. You posted video IIRC?
[14:20] <fsphil> did indeed, http://www.youtube.com/watch?v=_Ua21FSnIXc
[14:20] <jgrahamc> http://www.youtube.com/watch?v=_Ua21FSnIXc&feature=player_embedded
[14:20] <daveake_> Yes - see the mailing list
[14:20] <fsphil> was up a mountain that day
[14:20] <fsphil> daveake_, little down called Cookstown
[14:20] <fsphil> down/town
[14:21] <daveake_> Ta
[14:21] <daveake_> Sorry jgrahamc answered the wrong question!
[14:21] <fsphil> I say little but I walked one end to the other once and nearly died ;-)
[14:21] <SamSilver> jgrahamc: aaahhh that would be way toooo much for her !
[14:22] <jgrahamc> lol
[14:22] <daveake_> fsphil - so that's 310 - 330 miles :)
[14:22] <fsphil> sweet
[14:23] <fsphil> it was a very nice signal
[14:23] <daveake_> I'd only tested to 1.5 miles on the ground!
[14:23] <daveake_> Must have got the antenna length just right LOL
[14:24] <jgrahamc> It's cool isn't it. I'd tested GAGA-1 over 5.5km using just a whip and the signal was really clear. Then fsphil picked it up with the Yagi when flying from 542km.
[14:24] <fsphil> I've a handy mountain to test from :)
[14:24] <fsphil> well, had - the car is still exploded
[14:25] <fsphil> After the failed antenna on the second flight, I tested the third one more than any other part
[14:25] <fsphil> it got range tests, swr tests and was made to survive being thrown about
[14:28] <jgrahamc> Testing is good. I tested GAGA-1 a great deal. Didn't want anything to go wrong on the day.
[14:28] <jgrahamc> Also, I spent a lot of time on self-testing in the GAGA-1 software so it would double check me.
[14:29] <jgrahamc> People seem to overlook the importance of making sure that the software really works.
[14:30] <jgrahamc> But then again I am a programmer.
[14:30] <fsphil> which reminds me, needa start that "do / don't" page
[14:31] <fsphil> the same padding and meridian error has cropped up a few times this year
[14:31] <m0jsn> nova19 for one
[14:32] <Upu> yeah fsphil that would help
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[14:35] <jgrahamc> Agreed.
[14:36] <daveake_> Yeah, I only changed the GPS code 2 days before launch, breaking my own rule about late changes!
[14:36] <jgrahamc> I think a do/don't page would be a good idea, but also maybe some standard libraries of functionality that have been flight tested. I wrote pretty much everything for GAGA-1, but would have been good to be able to use known code and not just something scavenged from the web.
[14:36] <daveake_> There's nothing like having a fairly public bug to remind me about that rule!
[14:36] <jgrahamc> That's a major no no. Don't change anything at all.
[14:36] <daveake_> Yep
[14:37] <daveake_> Testing time went down from weeks to hours right therre
[14:37] <jgrahamc> Also, you just know that an untested line of code is an incorrect line of code.
[14:38] <jgrahamc> It's also the case that the thing that did go wrong on GAGA-1 (the batteries coming out of the battery pack on landing) was not something I'd tested for.
[14:39] <fsphil> it's always something silly though
[14:39] <m0jsn> that's happened many times before
[14:39] <fsphil> like me putting the antenna on the bottom, and having it connected directly to the pcb so that all the force of landing went into the middle of the computer board :)
[14:40] <jgrahamc> It's obvious with hindsight that I should have drop tested the capsule.
[14:40] <jgrahamc> Whoops fsphil
[14:40] <m0jsn> fsphil: hehe I remember that
[14:40] <m0jsn> still worked afterwards didn't it?
[14:40] <jgrahamc> Someone needs to do a talk at the conference about 'tree detection and avoidance' :-)
[14:41] <m0jsn> lol
[14:41] <m0jsn> james hopefully
[14:41] <fsphil> it died on landing, but all the individual parts worked fine
[14:41] <m0jsn> fsphil: ah right
[14:41] <fsphil> it flew again as hadie:2 -- which ended even more badly lol
[14:42] <jgrahamc> Perhaps for GAGA-3 I'll put a propeller on top of the capsule and have it hover until it's commanded to land :-)
[14:42] <fsphil> oooh
[14:42] <fsphil> do that
[14:43] <fsphil> would be nice to be able to uplink a designated landing spot
[14:43] <fsphil> as it descended
[14:43] <fsphil> some steering with the parachute
[14:43] <jgrahamc> Yes, it would.
[14:44] <jgrahamc> But I'd settle for just hovering at 300m until I get there :-)
[14:44] <fsphil> mine landed in a tree at 350m ;-)
[14:44] <fsphil> which was a but of a surprise when we where watching it falling
[14:44] <jgrahamc> Ah yes. Was assuming East Anglia = flat
[14:45] <fsphil> "um.. it landed in a cloud"
[14:45] <fsphil> aah yes, no big hills
[14:45] <fsphil> must be nice lol
[14:46] <fsphil> I'll avoid any launches that predict it landing near a big forest like that
[14:46] <daveake_> fsphil - antenna - LOL! I put mine in a rubber grommet that in turn was fixed into the centre of the 4-wire ground plane. Some thick wire wrapped around the grommet (and insulated by tape from the ground plane) connected the antenna wire to the NTX2. A plastic straw meant that if the antenna got pushed up it couldn't hit anything inside the box.
[14:46] <fsphil> thankfully though it picked that one -- the others around it where HUGE
[14:47] <fsphil> aah see that's smart, I didn't think of that
[14:47] <fsphil> it was a real "Duh" moment when we opened the box
[14:47] <fsphil> at least the other payload survived and we where able to find it
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[14:48] <jgrahamc> My biggest duh moment on GAGA-1 was that I couldn't hear the transmitter on landing because of the battery problem and then I totally forgot about James' hellschreiber beacon that was attached and didn't bother listening for it.
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[14:49] <fsphil> aah
[14:49] <fsphil> I received that too -- really neat mode
[14:50] <jgrahamc> Silly of me, but in the excitement I forgot all about it.
[14:50] <jgrahamc> Also didn't get a location from the GSM backup because it was upside down and hence no GPS lock.
[14:52] <jgrahamc> Yes, fsphil hell is really cool.
[14:52] <jgrahamc> Of course, it didn't have a GPS in it but I could have followed the signal with the Yagi.
[14:52] <Elwell> fsphil: so we should take the hit on longer cable losses and make sure there's a big enough cable loop inside the payload to cope with antenna being 'fully retracted' inside
[14:55] <fsphil> or make the external part of the antenna more flexible
[14:55] <fsphil> I did both - there was a short loop inside the payload box too
[15:01] <perseus> exit
[15:01] <fsphil> say please
[15:02] <perseus> *sorry*
[15:02] <perseus> meant "/wc", lol
[15:02] <fsphil> at least there wasn't a password there :)
[15:02] <perseus> "/wc please?"
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[15:07] <daveake_> If you go to http://residentialsearch.savills.co.uk/property-detail/300137/list/houses-for-sale/england/oxfordshire/watlington/ox49/0/0/1000000000/5.0/hi/gbp/1, that's the property that CLOUD1 landed in.
[15:07] <daveake_> Then click on the 2nd picture from the right, showing a garden seat
[15:08] <daveake_> Then compare with this frame taken just before the video quit! http://www.flickr.com/photos/daveake/5926089755/
[15:09] <daveake_> Landing site here - http://maps.google.co.uk/maps?q=howe+hill,+watlington&hl=en&ll=51.616604,-0.992503&spn=0.006462,0.015643&sll=51.613008,-0.990786&sspn=0.10052,0.259724&t=h&z=17 quite close to lots of trees!
[15:09] <daveake_> 8 miles away from the prediction
[15:10] <daveake_> I did think about a self-retracting antenna ... pull it into the box before impact, but maintaining the electrical contact next to the ground plane.
[15:11] <daveake_> Upside down GSM backup - I had that too!
[15:12] <fsphil> making the antenna collapsible is probably the best bet
[15:12] <fsphil> or put it on the top
[15:12] <fsphil> or even designing it into the box
[15:12] <fsphil> the polystyrene shouldn't have an effect
[15:12] <daveake_> No, it won't
[15:13] <daveake_> The metal bits will .. cameras, computer, etc
[15:14] <daveake_> My degree is in electronics but I still regard radio and antennas as "magic". :)
[15:15] <fsphil> right there with you -- it's all voodoo to me
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[15:15] <fsphil> how you get from electrical current to EM waves is bonkers
[15:15] <daveake_> Yep. It can't work. Never has. LOL
[15:17] <SamSilver> daveake_: the picture above the word "hide" shows the roundness of the bench very well http://residentialsearch.savills.co.uk/property-detail/300137/list/houses-for-sale/england/oxfordshire/watlington/ox49/0/0/1000000000/5.0/hi/gbp/1
[15:19] <daveake_> yes, that's the one I meant :)
[15:19] <daveake_> Good job it wasn't occupied at the time !!!
[15:19] <SamSilver> oops from the right me silly
[15:19] <daveake_> :)
[15:19] <SamSilver> bonk!
[15:20] <SamSilver> then a whineing sound
[15:20] <daveake_> From the hitter or hittee? ;-)
[15:22] <daveake_> "The garden has a large number of mature trees" .... yes, and I was staring at those a lot especially when the Yagi picked up a stronger signal when I pointed it upwards!
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[15:33] Nick change: The-Comp1ler -> The-Compiler
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[15:40] Action: fsphil is tidying the room out, but will soon need a tardis to store everything in
[15:40] <SamSilver> Graham Norton had one a while back
[15:40] <SamSilver> Tardis that is
[15:42] <stl_drock> Hello. I'm getting ready for my first launch. One thing I'm not sure about is condensation on my cameras lens. Does anyone have some links or ideas? Should I use glass or plexiglass? Or just leave the lens exposed? Thanks.
[15:44] <SamSilver> exposed so that sublimation can take place
[15:45] <SamSilver> Sublimation (phase transition), the change from solid to gas, while at no point becoming a liquid
[15:45] <daveake_> Just leave it bare
[15:46] <SamSilver> think of it as low temp low preasure boiling
[15:50] <jgrahamc> Agreed. Leave it open to the sky.
[15:50] <jgrahamc> Where's your launch from stl_drock ?
[15:54] <stl_drock> St. Louis, Missouri USA. as part of our hackerspace.
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[16:08] <Dan-K2VOL> hi stl_drock
[16:09] Nick change: DanielRi1hman -> DanielRichman
[16:11] <stl_drock> Hello Dan.
[16:12] <Dan-K2VOL> stl_drock, I'm with the LVL1 hackerspace in Louisville KY, we're doing balloons too, how's it going?
[16:15] <stl_drock> Our hackerspace Arch Reactor is just getting started. We managed to get a $400 grant to do this. We're not really doing anything new this time, but getting our feet wet and hoping for some good pictures. Sadly, we don't have any HAM operators at this time, so we'll be using the i290 cell phone for tracking. We'll have APRS on the next flight.
[16:16] <stl_drock> That's "just getting start on this project. AR is on it's third year.
[16:17] <Dan-K2VOL> oh cool
[16:17] <Dan-K2VOL> it is a little costly!
[16:19] <stl_drock> It's actually cheaper than I thought.
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[16:20] <Dan-K2VOL> it's fun to do anything in balloons. we've bitten off a pretty big chunk with our balloon project, lured by having experienced members here from other balloon programs to guide things. LVL1 decided to strictly do what's not been done before - cheap 2-way satellite communication, and trying to break the world distance record for balloons in a trans-atlantic crossing
[16:21] <stl_drock> Awesome! What satellite communication hardware?
[16:21] <Dan-K2VOL> we're trying to make an open source arduino library for talking with the $150 sat modem, and publish plans for the gossamer 3-foot tall quadruple helix antenna that's a balloon-friendly 3oz in weight
[16:22] <Dan-K2VOL> it's a Digi m10 for the ORBCOMM network
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[16:23] <stl_drock> and I'm off and googling!
[16:24] <Dan-K2VOL> :-)
[16:25] <Dan-K2VOL> are you guys going to MakerFaire Detroit?
[16:27] <stl_drock> I'm sure someone will go. I can't make it this year. last year we ended up with 10 members going. It was a blast. And actually much better than the Bay Area one. The Bay one is way to big on people looking for capital inverstors.
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[16:27] <stl_drock> www.lvl1.org doesn't work?
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[16:32] <stl_drock> Now its working. Go figure.
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[16:54] <Dan-K2VOL> whitestarballoon.org is the balloon project
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[17:10] <NigelMoby> Meep
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[17:10] <Dan-K2VOL> moop
[17:10] <Dan-K2VOL> I'm sorry nigel, the card says moops
[17:10] <NigelMoby> Hey Dan
[17:10] <NigelMoby> Lol
[17:10] <Dan-K2VOL> did you guys get seinfeld tv show over ther?
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[17:10] <NigelMoby> Think so
[17:10] <NigelMoby> I don't watch tv much though
[17:10] <Dan-K2VOL> oh no problem, here's the "card says moops" episode script, one of my favorite scenes in the show - http://www.seinfeldscripts.com/TheBubbleBoy.htm
[17:11] <NigelMoby> Oo cheers ill take a look
[17:11] <Dan-K2VOL> just search for moops on there for a chuckle
[17:12] <NigelMoby> Lol good stuff!!
[17:14] <NigelMoby> Picochu launches a week Saturday
[17:14] <Dan-K2VOL> nice!
[17:15] <NigelMoby> Bout time I got a balloon in the air lol
[17:15] <NigelMoby> How high it goes is anyone's guess mind
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[17:18] <Dan-K2VOL> hehe
[17:21] <NigelMoby> As long as it stays under 18km I'm happy
[17:41] <fsphil> ooh a launch
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[17:48] <fsphil> evening rjharrison
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[18:00] <rjharrison> hey fsphil
[18:00] <rjharrison> Hows it going
[18:00] <rjharrison> Sorry bit slow here
[18:01] <rjharrison> Launching tomorrow
[18:01] <fsphil> good luck! I'll setup the radio and have a listen
[18:01] <fsphil> school launch isn't it?
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[18:05] <LazyLeopard> Got a prediction?
[18:10] <rjharrison> Yep launch at 10:30 BST 9:30 GMT
[18:10] <rjharrison> Yep one sec
[18:10] <rjharrison> opps must get the supper out
[18:10] <LazyLeopard> ;)
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[20:10] #highaltitude: mode change '+o jonsowman' by ChanServ!ChanServ@services.
[20:11] Topic changed on #highaltitude by jonsowman!jonsowman@kryten.hexoc.com: Welcome to #highaltitude - discuss anything to do with high altitude projects (balloons, gliders, etc) www.ukhas.org.uk
[20:11] #highaltitude: mode change '-o jonsowman' by ChanServ!ChanServ@services.
[20:20] <NigeyS> hey jonsowman
[20:21] <jonsowman> hi NigeyS
[20:21] <jonsowman> how are things
[20:21] <NigeyS> not to bad, and yourself ?
[20:21] <jonsowman> yep all good thanks :)
[20:21] <NigeyS> how did the exams go ?
[20:21] <jonsowman> not too bad, got a 2.I so I'm happy ;)
[20:21] <NigeyS> awsome, congrats
[20:22] <jonsowman> thanks :)
[20:22] <Upu> grats all the best people get 2.1's
[20:22] <jonsowman> haha yes, a lot of people I know have done so
[20:23] <Elwell> pfft, 2.2 takes more skill (well, alcohol...)
[20:23] <Elwell> well done tho
[20:23] <jonsowman> haha
[20:23] <jonsowman> :D
[20:24] <NigeyS> hehe
[20:24] <NigeyS> jonsowman, picochu launch is 23rd july
[20:24] <SpeedEvil> Congrats jonsowman
[20:24] <jonsowman> NigeyS: excellent :D
[20:24] <jonsowman> thanks SpeedEvil :)
[20:25] <jonsowman> NigeyS: where you launching from?
[20:25] <fsphil-laptop> yay good news :)
[20:25] <NigeyS> jonsowman, a friend of mine's garden! as its only the foil balloons and we're inflating fully i dont see there being a problem with a local launch
[20:26] <jonsowman> good stuff
[20:26] <jonsowman> sounds good to me
[20:27] <Dan-K2VOL> NigeyS, going for a very short flight?
[20:27] <NigeyS> hes right on the outskirts of cardiff to
[20:27] <NigeyS> Dan-K2VOL, its a test of how far the foil ballons will go when fully inflated, steve would like the data .. but i imagine it to be a short flight yup
[20:28] <Upu> good job I ran this data fsphil my code is total crap
[20:28] <Dan-K2VOL> cool
[20:28] <Dan-K2VOL> is it possible to record your lift and weight to the gram while indoors Nigey?
[20:29] <fsphil-laptop> eek!
[20:29] <Dan-K2VOL> that would be very useful for checking superpressure math
[20:29] <fsphil-laptop> spitting out bad data Upu?
[20:29] <Upu> tragic
[20:29] <Upu> http://pastebin.com/G5LfmSUC
[20:29] <NigeyS> Dan-K2VOL, yup, will have some very accurate scales, and a good regulator on the He so i can get fairly good measurements
[20:30] <fsphil-laptop> aah the old padding bug
[20:30] <Upu> off to pull the code apart :)
[20:30] <Dan-K2VOL> nice NigeyS
[20:31] <fsphil-laptop> you need to pad your integers with 0 .. so %04i instead of just %i
[20:31] <Dan-K2VOL> nigeys by inflating fully do you mean superpressurized or just full
[20:31] <fsphil-laptop> you're negative sign is working though!
[20:32] <NigeyS> Dan-K2VOL, just full, the balloons have a self sealer when fully inflated
[20:36] <daveake> Upu, join the club :-)
[20:37] <Upu> yeah I thought I'd checked this, but felt it was worth a double check :/
[20:37] <Upu> Going to write an article on how to check
[20:37] <Dan-K2VOL> cool nigeys
[20:37] <Upu> Learning from others mistakes best way :)
[20:37] <fsphil-laptop> lol
[20:38] <daveake> I think for the conf in October, those of us that have done the latitude bug thing should sit in the corner with dunce caps on :)
[20:38] <Upu> corners not big enough :)
[20:38] <daveake> LOL
[20:38] <daveake> I just looked at the remains of my payload, 'chute and balloon
[20:39] <daveake> The chute <--> payload lines are *completely* wrapped up by the latex
[20:39] <daveake> The 'chute could hardly open
[20:39] <Upu> is there any Arduino data type with more precision than float ?
[20:39] <LazyLeopard> Payload come down a bit hard?
[20:39] <daveake> Estimated 26mph
[20:39] <daveake> It did hit a tree though which must have helped
[20:40] <daveake> The impact stopped the video and rebooted the arduino
[20:40] <NigeyS> daveake, what was that awful squeal in the videos ?
[20:40] <daveake> GPS was lost probably because antenna was pointing down or sideways
[20:41] <daveake> NigeyS I put a piezo buzzer on. Due to lack of time to add code to switch it on at the right time, I just connected it to its own PP3 Duracell
[20:41] <daveake> So it whistled throughout the flight, but it was very very helpful in locating the payload in the forest!
[20:41] <Dan-K2VOL> ha you could save beeper power by exposing an alkaline battery to the cold so it won't drain while at altitude
[20:42] <NigeyS> ahhh
[20:42] <daveake> It did whistle throughout though!
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[20:42] <daveake> Quieter at altitude, presumably because of the thinner air but maybe the battery voltage dropped too
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[20:44] <daveake> Upu double
[20:44] <Upu> yeah seems to be an issue when I'm using strtod
[20:44] <daveake> Write your own :)
[20:44] <Upu> my coding abilities are weak at best
[20:45] <fsphil-laptop> Upu, it might be worth sticking to integers only
[20:46] <Upu> 00005.5754 is from the NMEA data which becomes 5.58
[20:46] <daveake> Yeah, I did that for my longitude/latitude code. Separate ints for before and after the decimal point.
[20:46] <daveake> Look where that got me LOL
[20:46] <Randomskk> daveake: today at work
[20:46] <daveake> Wow
[20:46] <Randomskk> I did the same thing you did
[20:46] <Randomskk> had the same problem
[20:46] <Upu> float LONGDITUDE= strtod(GPS_DATA_VALUES,NULL);
[20:47] <Randomskk> didn't zero pad my microseconds
[20:47] <daveake> I feel better now :)
[20:47] <fsphil-laptop> lol
[20:48] <Randomskk> it made my graph go a bit weird but happily I spotted it before the code was 30km high ;P
[20:48] <daveake> Yes, it was a bit public :)
[20:49] <fsphil-laptop> my code had the -0.5 = 0.5 bug
[20:49] <fsphil-laptop> though it was low risk as I'm nowhere near the meridian
[20:50] <daveake> A few weeks before I had some code running for the WRC in Greece, going live on TV for the first time. Glad that was better tested!
[20:50] <Dan-K2VOL> what was that daveake
[20:50] <daveake> Split Timing device
[20:50] <Dan-K2VOL> cool
[20:50] <fsphil-laptop> I've yet to have anything on TV that I know about anyway
[20:50] <fsphil-laptop> did sent in a hab picture to the local weather, they sometimes show pics
[20:51] <daveake> They now have a live TV stage where a helicopter follows each car along the stage. At the halfway point they get a split time put on the TV screen so the commentator can say how well the car is doing vs the previous best
[20:52] <SpeedEvil> I like the 'top gear' solution.
[20:52] <daveake> I designed some of the electronics and wrote all the firmware in the device that measures the timing and transmits over a radio modem link.
[20:52] <SpeedEvil> Show a split-screen horizontally, with this car, and the last car, synced
[20:53] <daveake> I *thought* we were *just* testing. We ran 2 tests during the day at 2 earlier stages, then ran as if it was live on TV during the final "live TV" stage.
[20:53] <SpeedEvil> :)
[20:53] <SpeedEvil> And it was actually live?
[20:53] <daveake> Nobody told me that the TV guys were confident enough it was working that they flicked the switch and put it live on TV
[20:53] <daveake> I found out afterwards.
[20:53] <daveake> I think they kept it quiet from me deliberately!
[20:54] <SpeedEvil> As long as the worst case is just going wrong, not playing out HD hardcore porn.
[20:54] <Dan-K2VOL> haha
[20:54] <daveake> lol
[20:54] <Dan-K2VOL> yes, never leave the porn in the ROM
[20:54] <Dan-K2VOL> number one rule of programming
[20:54] <daveake> 256kbytes ... not much action in that space
[20:54] <fsphil-laptop> ascii porn!
[20:54] <Dan-K2VOL> haha
[20:54] <daveake> lol
[20:56] <daveake> When I say "live", actually they had someone visually check the timings and press "OK to put on the screen" if he thought it was OK
[20:56] <daveake> When I watched the TV footage there was 10 seconds between when I pressed the button as the car came by, to when the time appeared on the screen
[20:56] <Dan-K2VOL> a good plan for a first use on air I'd say
[20:57] <daveake> Absolutely
[20:58] <daveake> The customer I wrote this for want to sponsor my next HAB launch, so it was a good result all round :)
[20:58] <Dan-K2VOL> oh interesting, no RFID auto-detection of the car? :-P
[20:58] <Dan-K2VOL> very nice!
[20:58] <daveake> They're thinking of that
[20:58] <daveake> I'd personally be surprised if RFID works far enough and quickly enough to do it
[20:58] <daveake> But apparently the RFID sales guy reckons it will
[21:00] <Dan-K2VOL> I regularly work with RFID designs at work, it can, if it's the right type of system, (proper antennas, correct frequency, etc)
[21:00] <daveake> good :)
[21:00] <fsphil-laptop> sales guys always reckon it works
[21:00] <fsphil-laptop> it's their job :)
[21:00] <daveake> I know!
[21:01] <daveake> You might be interested to know that the WRC cars have GPS tracking, sent at 458MHz-ish / 1W up to an aircraft repeater then down to the base station.
[21:01] <Dan-K2VOL> an AIRCRAFT??
[21:01] <Dan-K2VOL> lol
[21:01] <daveake> Yes, and aircraft
[21:01] <Dan-K2VOL> where's a balloon when you need it
[21:02] <daveake> Going the wrong way probably!
[21:02] <Dan-K2VOL> gtg all, have a nice night
[21:02] <fsphil-laptop> tethered
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[21:02] <daveake> They loop the plane round somewhere between the stages and the base
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[21:03] <daveake> It'd have to be a big balloon to carry all the repeaters - the teams have repeaters in the aircraft for speech, as well as the WRC tracking stuff.
[21:03] <fsphil-laptop> aah each team uses their own stuff?
[21:03] <daveake> Believe so. I'll ask.
[21:04] <daveake> We had a repeater for the split timing too
[21:04] <Laurenceb_> http://www.youtube.com/watch?v=hU0_tGHlR7g&feature=player_embedded
[21:04] <SpeedEvil> Well - a tethered balloon is a sane option
[21:04] <SpeedEvil> In some cases
[21:05] <SpeedEvil> Or a silly aerostat
[21:06] <SpeedEvil> love the second comment
[21:08] <SpeedEvil> Rattlesnake is cool.
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[21:27] <Laurenceb_> http://www.varesano.net/
[21:27] <Laurenceb_> yummmm
[21:28] <SpeedEvil> That's just a dumb thing with them all on an i2c bus - and no micro?
[21:31] <Laurenceb_> yes
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[21:31] <Lunar_Lander> hello
[21:31] <linear_shift_p4> No chipselect either?
[21:31] <Laurenceb_> ive heard back from st and measurement specialities, 12 euros for that pressure sensor and lsm303dlm samples are freeeee
[21:31] <fsphil-laptop> yo Lunar_Lander
[21:31] <SpeedEvil> Is a neat board
[21:32] <Lunar_Lander> how's life?
[21:32] <Laurenceb_> 10cm rms altitude error at 100hz sample rate isnt bad
[21:32] <fsphil-laptop> had a day off, weather was good :) you?
[21:32] <Laurenceb_> it works downt o really low pressure as well
[21:32] <SpeedEvil> Laurenceb: wow
[21:33] <Lunar_Lander> same here fsphil-laptop
[21:33] <Lunar_Lander> :)
[21:33] <Laurenceb_> they have nice differential sensors thatd be suitable for pitot, but not avaliable to buy yet
[21:34] <Laurenceb_> bare die sensors are avaliable :P
[21:34] Action: Laurenceb_ wonders if you could solder onto 100um square
[21:36] <SpeedEvil> Funky!
[21:36] <SpeedEvil> Bother azonberg over on ##electronics
[21:36] <SpeedEvil> :)
[21:37] <SpeedEvil> 100um with what spacing?
[21:37] <Laurenceb_> he runs varesano?
[21:37] <Laurenceb_> ~400um
[21:37] <Laurenceb_> die is 2.5mm square
[21:37] <SpeedEvil> No - he's the guy doing MEMs at home
[21:37] <staylo> Laurenceb_: Which meas-spec sensor?
[21:37] <Laurenceb_> MS5611-01BA
[21:39] <SpeedEvil> 'linear range of ADC' 10-1200.
[21:39] <staylo> Ah, nice. Just got a breakout board for the MS5611 from embedded adventures, haven't had time to play around with it yet but I hear it's really impressive.
[21:40] <SpeedEvil> Does that imply it's non-linear higher than that I wonder
[21:40] <SpeedEvil> lower
[21:40] <Laurenceb_> thats millibar?
[21:41] <Laurenceb_> im guessing maybe its the calibrated range?
[21:41] <SpeedEvil> perhaps
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[21:42] <Laurenceb_> of course there is a simple way to make a baro
[21:42] <Laurenceb_> two of them :P
[21:43] <Laurenceb_> suffers quite badly from offset tho
[21:43] <Laurenceb_> baro offset isnt an issue as weather is massively larger
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[21:57] <fsphil> lie .. lettuce is never nifty :)
[21:57] <niftylettuce_> :) was reading some IRC logs from this channel, interesting
[21:58] <fsphil> (hi btw ;) -- yea the discussion can be pretty deep sometimes
[21:59] <niftylettuce_> horus 7 looks nifty
[22:00] <niftylettuce_> it would be interesting to send up a scope along with a payload
[22:00] <niftylettuce_> has anyone done this?
[22:01] <fsphil> a telescope?
[22:03] <niftylettuce_> fsphil: yea
[22:07] <Lunar_Lander> I thought about that
[22:08] <Lunar_Lander> but you have loads of vibration and oscillation
[22:11] <fsphil> yea
[22:12] <fsphil> the really high up air is quite steady, but the payload doesn't tend to stay there very long
[22:12] <fsphil> and it will still have some motion
[22:13] <fsphil> (by high up I mean >30km)
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[22:17] <Lunar_Lander> yeah
[22:17] <Lunar_Lander> it might be better on a ZP or SP niftylettuce_
[22:17] <Lunar_Lander> and you'd need a stabilizer and a focus system and so on
[22:18] <fsphil> there have been telescopes on ZP balloons iirc
[22:18] <fsphil> blast was one wasn't it?
[22:19] <fsphil> if I ever make a floating balloon, I'm going to put a camera on it looking up and taking long exposures
[22:19] <fsphil> most will be blurry but there's got to be the odd sharp one
[22:19] <fsphil> would be nice to see the milkyway behind the balloon
[22:21] <Lunar_Lander> yeah, BLAST, SUNRISE, STRATOSCOPE I and II
[22:23] <Upu> Quick Q in Arduino
[22:23] <Upu> LONGDEC = 49/60; where LONGDEC is a float
[22:23] <Upu> why does that come out as 0.00
[22:24] <Upu> am I being really thick ?
[22:24] <Randomskk> 49.0 / 60.0
[22:24] <Randomskk> you're dividing two integers, the numerator smaller than the denominator, so it comes out to integer 0, then is cast to a float
[22:25] <Randomskk> put .0 after them to specify that the constants are floats
[22:25] <Upu> ah
[22:25] <Upu> thx
[22:25] <fsphil> that still gets me sometimes
[22:26] <Lunar_Lander> fsphil niftylettuce_ this is how stratoscope II looks like http://www.nasm.si.edu/collections/artifact.cfm?id=A19650085000
[22:26] <Upu> that works thanks
[22:28] <Lunar_Lander> http://www.unmannedspaceflight.com/index.php?showtopic=5002
[22:32] <Lunar_Lander> niftylettuce_ still there?
[22:35] Dan-K2VOL (~Adium@69.64.6.70) joined #highaltitude.
[22:36] <Lunar_Lander> well
[22:36] <Lunar_Lander> good night
[22:36] <niftylettuce_> Lunar_Lander: yea
[22:36] <Lunar_Lander> ah
[22:37] <Lunar_Lander> seen the Stratoscope II?
[22:37] <niftylettuce_> Lunar_Lander: looking at it now
[22:37] <Lunar_Lander> cool
[22:37] <niftylettuce_> Lunar_Lander: ZP or SP?? whats that
[22:38] <Lunar_Lander> zero-pressure and superpressure balloon
[22:38] <Lunar_Lander> one that doesn't burst
[22:39] <niftylettuce_> Lunar_Lander: wow Stratoscope II took those photos of Io? thats impressive
[22:39] <Lunar_Lander> yeah :)
[22:40] <NigeyS> hey Dan-K2VOL
[22:41] <niftylettuce_> Lunar_Lander: any where you might find out how to build one of those?
[22:41] <niftylettuce_> Lunar_Lander: blueprints or schemas?
[22:41] <Lunar_Lander> I can try to find the papers on the scope on the NASA Astrophysics serve
[22:41] <Lunar_Lander> *server
[22:42] <niftylettuce_> Lunar_Lander: that'd be great
[22:42] <hibby> Dan-K2VOL: ping
[22:42] <niftylettuce_> Lunar_Lander: is that an access only serve?
[22:42] <Lunar_Lander> no, free for all
[22:42] <niftylettuce_> r
[22:42] <niftylettuce_> Lunar_Lander: link?
[22:42] <niftylettuce_> Lunar_Lander: anonymous FTP or is it web based
[22:42] <Lunar_Lander> http://adswww.harvard.edu/
[22:42] <Lunar_Lander> web
[22:44] <Lunar_Lander> niftylettuce_ http://bit.ly/riAHxO
[22:45] <Lunar_Lander> PDF on uranus photos
[22:45] <niftylettuce_> Lunar_Lander: ty
[22:50] <griffonbot> Received email: daveake "[UKHAS] Re: CLOUD1 photos and videos"
[22:52] <Lunar_Lander> http://bit.ly/p9BppW
[22:52] <Lunar_Lander> one more
[22:53] <Lunar_Lander> you're welcome :)
[22:57] <fsphil> very impressive to get surface detail on IO
[22:57] <fsphil> Io even
[22:57] <Lunar_Lander> yeah
[22:57] <fsphil> a few amateurs managed surface detail on callisto
[22:58] <fsphil> but only just
[23:00] <Lunar_Lander> yea
[23:01] <Lunar_Lander> and now good night :)
[23:02] <niftylettuce_> Lunar_Lander: \o
[23:02] Lunar_Lander (~lunar_lan@p54A0709A.dip.t-dialin.net) left irc: Quit: Lunar_Lander
[23:09] <fsphil> ooh nice writeup
[23:14] <fsphil> eek, it's tomorrow
[23:15] <griffonbot> Received email: Colin Tuckley "Re: [UKHAS] Re: CLOUD1 photos and videos"
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[23:25] <NigeyS> fsphil, it's today!
[23:35] <niftylettuce_> any good video/streams you guys know of?
[23:35] <niftylettuce_> besides nasa tv
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[00:00] --- Wed Jul 13 2011