highaltitude.log.20081013

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[14:27] <Laurenceb> hello
[14:31] <SpeedEvil> Hello.
[14:31] <gordonjcp> hi
[14:38] <Laurenceb> I finished the radio code
[14:38] <SpeedEvil> :)
[14:39] <Laurenceb> almost ready to go, just need a radiometrix tx and maybe some FRAM if I can get it
[14:40] <SpeedEvil> np: Tatu - Not gonna get it.
[14:40] <Laurenceb> ?!
[14:40] <SpeedEvil> Farnell have them I think
[14:40] <Laurenceb> you come out with some weird stuff
[14:40] <Laurenceb> ereally oh
[14:41] <SpeedEvil> Or a microSD
[14:41] <SpeedEvil> though those are a bit harder to drive.
[14:42] <Laurenceb> well I'm using my SPI
[14:42] <Laurenceb> and dont want to setup complex resource sharing protocols
[14:43] <Laurenceb> hmm they dont have 512K, only 256
[14:45] <Laurenceb> http://uk.farnell.com/1210785/semiconductors-integrated-circuits/product.us0?sku=ramtron-fm24c04a-g&_requestid=5290
[14:45] <Laurenceb> ^ why do they call that 512Kx8bit ?
[14:45] <SpeedEvil> A lot of these things go through translators from one format to another.
[14:46] <SpeedEvil> People can screw up in the formatting.
[14:46] <SpeedEvil> (I assume you mean it's not)
[14:46] <Laurenceb> yeah, itsa 4KB
[14:46] <Laurenceb> Kb*
[14:47] <SpeedEvil> how big were you wanting?
[14:48] <Laurenceb> 512Kb
[14:57] <Laurenceb> does the Yaesu FT-720R do ssb ?
[14:57] <Laurenceb> I'm googling about but cant find any info... guess its too old
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[15:51] <Laurenceb> hmmm http://www.radioworld.co.uk/~radio/catalog/vr500-yaesu-scanner-p-429.html
[15:51] <Laurenceb> not bad ?
[15:52] <gordonjcp> depends what you want it for
[15:52] <gordonjcp> scanners are usually pretty deaf
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[17:39] <Laurenceb> http://www.radioamateur.eu/schemi/FT790R_user.pdf
[17:50] <edmoore> Laurenceb: are you on the market?
[17:50] <Laurenceb> on the market?
[17:50] <edmoore> for a radio
[17:50] <Laurenceb> indeed
[17:50] <edmoore> in the market*
[17:50] <edmoore> ic-7000 :)
[17:51] <Laurenceb> £££££
[17:51] <edmoore> stipends are there for spending
[17:51] <Laurenceb> I'm looking for <£200
[17:51] <Laurenceb> if that manual is to believed the sensitivity is amazing
[17:51] <Laurenceb> 0.16uV
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[17:52] <Laurenceb> or at least very good compared to some of the more modern stuff
[17:52] <edmoore> yes. - and the ic-7000 weighs in at 0.12
[17:52] <Laurenceb> I was looking at the Yupiteru MVT-7100
[17:52] <edmoore> I am already saving up
[17:52] <Laurenceb> it can be picked up very cheap
[17:52] <Laurenceb> <£100
[17:53] <Laurenceb> and all the reviews say very good sensitivity, but test data is 0.26uV
[17:53] <edmoore> can always get a pre-amp tbh
[17:53] <Laurenceb> yeah
[17:53] <edmoore> probably a much more economical solution
[17:54] <Laurenceb> sensitivity is proportional to range right?
[17:54] <Laurenceb> erm inversly :P
[17:56] <Laurenceb> power=v^2/50 and power goes with 1/distance^2
[17:56] <Laurenceb> it'd be nice to have something you can carry in your pocket
[18:06] <gordonjcp> Laurenceb: I'm quite impressed with my Kenwood TH-F7
[18:07] <gordonjcp> Laurenceb: also my Jingtong JT-308, which is quite clearly a bit cheap and crap but amazing value for 15 quid
[18:08] <Laurenceb> I'm looking for ssb
[18:09] Action: SpeedEvil passes Laurenceb a BFO.
[18:12] <gordonjcp> indeed
[18:13] <gordonjcp> Laurenceb: the receiver-only side of my Kenwood does ssb
[18:13] <gordonjcp> it transmits on 2m and 70cm, and will receive from 100kHz to 1300MHz
[18:13] <gordonjcp> not *quite* DC to light, but good enough for me ;-)
[18:17] <Laurenceb> just reading the manual
[18:17] <Laurenceb> 0.22uV
[18:17] <Laurenceb> but I cant find it for sale anywhere :-/
[18:21] Action: SpeedEvil has an actual ham shop 3 miles away.
[18:22] <SpeedEvil> http://www.jayceecoms.com/
[18:24] <Laurenceb> aha http://www.radioworld.co.uk/~radio/catalog/thf7e-kenwood-70cm-p-397.html?osCsid=9c544f5f7593c485d6677658fce3ff74
[18:24] <Laurenceb> rather pricey
[18:26] <SpeedEvil> http://www.google.co.uk/products?btnG=Search+Products&hl=en&show=dd&q=kenwood+transceiver
[18:27] <gordonjcp> Laurenceb: it's a lot of radio for the money
[18:28] <gordonjcp> SpeedEvil: that's where I got mine, a couple of weekends ago
[18:28] <gordonjcp> they had an open day on
[18:28] <gordonjcp> had some exhibitors in the hall nearby and stuff
[18:28] <SpeedEvil> gordonjcp: The largest radio shop (and vendor) I've seen.
[18:28] <gordonjcp> damn, I wish I'd known you were that nearby - I'd have swung past and said hi
[18:28] <Laurenceb> I'll see if I can pick up a Yupiteru on ebay
[18:29] <SpeedEvil> gordonjcp: I was probably in the attic at that point, drilling stuff.
[18:30] <Laurenceb> interestingly the yupiteru manual says 0.5uV, but apparently a magazine tested it and got 0.26
[18:31] <gordonjcp> Laurenceb: I wouldn't pay much attention to all that
[18:31] <gordonjcp> there's really very little difference
[18:31] <SpeedEvil> To double the range from 0.5uV, you've gotta get 0.125.
[18:31] <SpeedEvil> So...
[18:32] <Laurenceb> no, surely its proportional
[18:33] <Laurenceb> as power is proportional to 1/range^2
[18:33] <Laurenceb> and power down a transmission line is V^2/impedance
[18:33] <Laurenceb> so 0.25
[18:34] <Laurenceb> but it does depend upon the output bandwidth
[18:41] <Laurenceb> amirite?
[18:44] <Laurenceb> I'm off, cya
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[18:46] <SpeedEvil> err - voltage yes. I was thinking of power oops.
[18:47] <SpeedEvil> http://geotate.com/en/products
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[18:47] <SpeedEvil> interesting GPS
[18:47] <SpeedEvil> (though probably not very applicable)
[19:25] <natrium42> hi
[19:29] <jnd> http://www.youtube.com/watch?v=IvB-8CWw9eU watch from 2:30 :)
[19:36] <natrium42> no sound?!?
[19:36] <natrium42> j/k, cool video
[19:40] <rocketboy> thats always amazing - no matter how many times I see it - 3mis to space
[19:40] <rocketboy> mins
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[19:41] <Laurenceb> hello
[19:41] <Laurenceb> rocketboy: hi there
[19:42] <Laurenceb> I was looking at scanners for ssb
[19:42] <Laurenceb> what sort of sensitivity do you think is needed?
[19:43] <gordonjcp> Laurenceb: you're overthinking it
[19:43] <gordonjcp> it won't make much of a difference what you get
[19:43] <Laurenceb> how so?
[19:44] <gordonjcp> because unless you're in a very remote part of the Scottish Highlands, then all the QRM round about you will be hitting your receiver with several tens of microvolts
[19:44] <gordonjcp> what you're asking is if this microphone can pick up a mouse farting under the bonnet of my car
[19:44] <Laurenceb> hmm guess so
[19:45] <Laurenceb> but the superhet structure with IF filters solves that problem?
[19:45] <gordonjcp> life's a bitch, but all the cheap shiny that people buy pollutes the airwaves in a way that would be completely unacceptable if it was chemical pollution
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[19:45] <rocketboy> gordoncp - thats not the way we find it at all - most of the time we are in the countryside well away from QRM (radio noise)
[19:45] <gordonjcp> the average games console or TV or microwave oven is basically like a bus, trundling around belching out black smoke
[19:46] <Laurenceb> yes
[19:46] <rocketboy> most of the time we are in fields and open countryside
[19:46] <Laurenceb> but its not an effective radiator
[19:46] <gordonjcp> rocketboy: in which case, a few tenths of a microvolt sensitivity isn't going to make a difference anyway
[19:46] <Xenion> Gute Nabend / good evening folks :-)
[19:46] <Laurenceb> surely your range is proportional to the sensitivity (theoretically)
[19:47] <Laurenceb> hello
[19:47] <Xenion> greetings :D
[19:47] <rocketboy> I hate to disagree again - a good rig is say 0.15uV sensitivity - whereas a typical scanner is 0.5uV - thats a lot of dbs
[19:47] <gordonjcp> yes
[19:47] <gordonjcp> scanners are incredibly deaf
[19:47] <Xenion> can someone help me with the choice of my ballon ?
[19:47] <Laurenceb> yeah, that was the way I was thinking
[19:48] <gordonjcp> Laurenceb: the antenna is far more significant
[19:48] <Laurenceb> sure
[19:48] <gordonjcp> Laurenceb: you could have a receiver sensitive down to a few picovolts, but if you've got a shite antenna you wouldn't hear me keying up my 100W SSB transmitter at the end of the street
[19:48] <gordonjcp> (slight exaggeration)
[19:48] <Xenion> http://kaymont.com/pages/sounding-balloons.cfm im unsure about which one to buy 1200 1500 2000 or 3000
[19:49] <Xenion> except for the bust height im seing no difference :/
[19:49] <gordonjcp> Laurenceb: a good directional antenna will pick up the wanted signal and reject a lot of the crap from round about
[19:49] <Laurenceb> amount of helium?
[19:49] <Xenion> Laurenceb, right ok
[19:49] <rocketboy> payload weight?
[19:49] <Xenion> what is "recommended free lift"
[19:49] <rocketboy> desired altitude?
[19:49] <Xenion> rocketboy, all the same ( or ? )
[19:50] <Xenion> im wondering what free lift means
[19:50] <rocketboy> see the burst calculator on the wiki - it should give you some idea on which you need
[19:50] <Xenion> rocketboy, hm
[19:50] <Xenion> i know the calculator
[19:51] <rocketboy> free lift is the lift left after taking everything else into account
[19:51] <Xenion> hmm
[19:51] <Xenion> sorry rocketboy lift means ... the force which keeps the ballon rising ?
[19:51] <rocketboy> so lift - (payload weight + chute weight = balloon weight)
[19:52] <rocketboy> yep
[19:53] <rocketboy> the force left over to make the whole lot rise
[19:53] <Laurenceb> rocketboy: can you recommend anywhere to pick up a good rig?
[19:53] <Xenion> i see
[19:53] <Xenion> rocketboy, that helped
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[19:54] <Laurenceb> are the 2nd hand places other than ebay where hams congrigate?
[19:54] <rharrison1971> Evening all
[19:54] <rocketboy> see http://wiki.ukhas.org.uk/guides:balloon_data - burst1a.xls
[19:54] <rocketboy> mostly ebay these days
[19:54] <Laurenceb> I see
[19:55] <Laurenceb> rocketboy: http://www.radioworld.co.uk/~radio/catalog/thf7e-kenwood-70cm-p-397.html?osCsid=8e6a8b81e4ae7723235d94c5a8dc8377
[19:55] <Laurenceb> a good deal?
[19:56] <rharrison1971> between you and me Laurenceb I would go for a secondhand mobile radio
[19:56] <rharrison1971> Much better than a hand held
[19:56] <Xenion> ah cool
[19:56] <Laurenceb> that kenwood has good specs by the look of it
[19:58] <Laurenceb> + handheld is easier to transport
[19:59] <rharrison1971> Mobiles have more ports available and will serve you longer in your ballooning and ham life
[19:59] <rharrison1971> Laurenceb true
[19:59] <edmoore> Laurenceb: how easy does it need to be?
[19:59] <Laurenceb> ?
[20:00] <edmoore> well they're both easy to transport
[20:00] <edmoore> that one is easier than the other may not functionally mean much when they both will happily go in your rucksack
[20:01] <rharrison1971> the handheld have their ports overloaded it two functions at once and you may not wish for this in the future
[20:01] <gordonjcp> Laurenceb: the th-f7 has got a setting where you can put it into TNC mode, and it will bypass the audio filters
[20:01] <gordonjcp> Laurenceb: larger rigs would bring that out to a separate connector
[20:05] <Xenion> just a question to everyone else ... would it be of any help if i add up some germany specific notes to the wiki ( for example german helium reseller and so on
[20:06] <Xenion> <- does have quit a good understanding of the german laws regarding such things
[20:06] <rocketboy> A quick calc suggests 0.15uV is 10.5db better than 0.5uV - thtas about 3.5 x in terms of distance
[20:10] <rocketboy> So we have found the limit of communication for FT-790 is about 350 km
[20:11] <rocketboy> using rtty
[20:11] <gordonjcp> depending on the antenna
[20:11] <SpeedEvil> Moonbounce!
[20:11] <rocketboy> yeah using a 12.5dBi yagi
[20:11] <gordonjcp> also at 350km you're starting to get into the realms of the damn thing being over the horizon ;-)
[20:12] <rocketboy> so a similar setup using a scanner would be about 100km
[20:12] <SpeedEvil> Yeah - 350Km will be over the horizon usually.
[20:12] <SpeedEvil> Unless it's _very_ high
[20:12] <SpeedEvil> Or your reciever is on a balloon too
[20:12] <Laurenceb> balloon to balloon networking
[20:13] <Laurenceb> the radiometrix reciever doesnt look too bad
[20:13] <Laurenceb> if you sample the IF
[20:14] <Laurenceb> rocketboy: did you ever work out how to do that?
[20:14] <rocketboy> there is no real point in doing that IMO - just run more power on the ground - 400W ham licence is OK ground to air
[20:14] <Xenion> ballon meshing is something i'm definatly would like to do
[20:15] <rocketboy> so for simplicity use FM on the uplink
[20:15] <SpeedEvil> Or drop down to below the MUF
[20:15] <rocketboy> and 10W
[20:15] <edmoore> NOV and burn a hole in the balloon
[20:15] Action: SpeedEvil ponders laser-comms.
[20:15] <Laurenceb> it would need mirror stabilisation
[20:16] <SpeedEvil> yep.
[20:16] <Laurenceb> CD player style
[20:16] <Laurenceb> at least theres no clouds up there
[20:16] <Laurenceb> the problem is how to aquire the target
[20:16] <SpeedEvil> np: 808 state - Open your mind.
[20:17] <SpeedEvil> Paint teh balloon with a raster, use that as a pointing ref.
[20:17] <SpeedEvil> Though 808nm diodes are common, there is a lot of sun there.
[20:17] <Laurenceb> I doubt you'd be able to see the target balloon
[20:18] <SpeedEvil> Then again at these sorts of distances, you've got to use a pretty transparent bit of the atmosphere.
[20:18] <edmoore> bbl
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[20:18] <rocketboy> I think greg tracked a balloon using good binocs to about 25Km I worked out
[20:19] <SpeedEvil> I mean continually track the balloon with a laser, and the balloon points a laser at teh reciprocal.
[20:19] <Laurenceb> you could downlink coordinates over 434 then use ground comms to send coordinates
[20:19] <Laurenceb> then a very accurate IMU
[20:19] Action: SpeedEvil wishes for cheap MEMs about 10^6 better.
[20:20] <rocketboy> so - a 350km horizen at 10Km
[20:20] <rocketboy> 440km at 15km height
[20:20] <rocketboy> 500km at 20km
[20:21] <SpeedEvil> 800ish at 35?
[20:21] <Laurenceb> they use MEMS for satellite pointing - down to 2.5 meter resolution images
[20:21] <rocketboy> 620 at 30Km
[20:21] <SpeedEvil> Laurenceb: yeah - I mean actually available to mortals ones.
[20:21] <rocketboy> 670 at 35km
[20:21] <Laurenceb> problem is the gyros cost ~2K£ each
[20:21] <Laurenceb> from bae systems
[20:22] <Laurenceb> I was looking at the datasheet the other day, its really not much better than a melexis
[20:22] <SpeedEvil> quantity has a quality all of its own.
[20:23] <Laurenceb> the clever bit is in the kalman filter
[20:23] <SpeedEvil> If you're gonna make a hundred million of the things you can put a shitload more design into it than one that's gonna sell 10K.
[20:23] <SpeedEvil> Kalman++
[20:23] <Laurenceb> basically as your only doing very careful sweeps in a vacuum you can setup the filter so it integrates the gyro for longer
[20:24] <SpeedEvil> And you can make damn sure to keep the temp even.
[20:24] <Laurenceb> my parafoil code effectively trusts the gyro over 100s of ms
[20:24] <Laurenceb> ignore that
[20:25] <Laurenceb> sorry its just simple frequency filtering
[20:25] <SpeedEvil> As if you're doing a wingover, you're screwed anyway I guess.
[20:25] <Laurenceb> at least at the first stage
[20:25] <Laurenceb> so I have a bandpass below 14Hz
[20:25] <Laurenceb> they are a few times 10^-2 Hz
[20:27] <Laurenceb> then theres a star tracker comming in at a few Hz
[20:27] <rocketboy> I worked out the other day that at 30Km the earth horizen was about 5 degrees below the astronomical horizen
[20:27] <SpeedEvil> I've got bits for a star tracker.
[20:27] <SpeedEvil> I should try to get that completed some time.
[20:27] <Laurenceb> its not too hard really IMO
[20:27] <SpeedEvil> It got stalled waiting for a part that hasn't materialised.
[20:27] <Laurenceb> need to match the points to a database
[20:28] <Laurenceb> not sure of a good algorythm to do that....
[20:28] <SpeedEvil> Yeah - I was trying for the somewhat harder video startracker :)
[20:28] <rharrison1971> Laurenceb have you had any further thoughs on a radio
[20:28] <SpeedEvil> At 25Hz+
[20:28] <Laurenceb> not yet
[20:28] <Laurenceb> was looking around for good stuff
[20:31] <rharrison1971> I don't have that much experience but a mobile is probably the best way forward
[20:31] <Laurenceb> SpeedEvil: how do you match the image to the star database?
[20:32] <Hiena> Anybody has a suggestion for a good op.amp based AM modulator?
[20:32] <SpeedEvil> Laurenceb: http://focus.ti.com/docs/prod/folders/print/tx253spd-31.html was the CCD
[20:32] <rharrison1971> Laurenceb I brought this one but there are some on ebay closer to the price you indicated with the kenwood
[20:32] <rharrison1971> http://www.radioworld.co.uk/~radio/catalog/yaesu-ft45817nd-p-4323.html?osCsid=8e6a8b81e4ae7723235d94c5a8dc8377
[20:32] <SpeedEvil> Laurenceb: it diddn't look that hard on the face of it, so I diddn't go that far.
[20:32] <rharrison1971> I belive ICOM and YAESU are often seen as the leaders in the radio world
[20:33] <SpeedEvil> Laurenceb: I was looking at (IIRC) 60 degree lens that could see magnitude 5 stars.
[20:33] <Hiena> I have kind of problem to set the video gain for my transmitter.
[20:33] <SpeedEvil> Laurenceb: there weren't that many stars even in the densest fields.
[20:33] <Laurenceb> what processor wher eyou using?
[20:34] <SpeedEvil> Laurenceb: but then the above TI chip - which would have boosted the sensitivity by a couple of orders of magnitude came on the horizon, and I stopped the design to wait on it, and never got started.
[20:34] <SpeedEvil> Umm. It was a while ago.
[20:34] <SpeedEvil> I think ...
[20:34] <SpeedEvil> embedded AMD 486 of some sort
[20:35] <Laurenceb> intreaging
[20:35] <Laurenceb> on a SBC ?
[20:35] <SpeedEvil> Yes.
[20:35] <SpeedEvil> The TI CCD can do single phton pickup at video rates - which is nice.
[20:35] <SpeedEvil> But is unavailable.
[20:35] <Laurenceb> nice
[20:36] <SpeedEvil> single photoelectrons ratehr
[20:37] <SpeedEvil> I only got so far on the software side as to get xephem to spit out a list of all stars in 60 degree fields over the whole sky to specify the brightness required.
[20:38] <Laurenceb> right
[20:40] <SpeedEvil> Sun trackers are of course a good deal easier, and with magnetic field too, nearly as good.
[20:40] <rocketboy> The FT817 has a quoted sensitivity of 0.25uV on 430MHz SSB - so not bad - but not what I would call good
[20:41] <Laurenceb> the FT-790R is 0.16 ?
[20:41] <rocketboy> a good pre-amp is a way to improve sensitivity
[20:41] <Laurenceb> yeah
[20:41] <natrium42> rharrison1971, so... launch this weekend? :)
[20:41] <rocketboy> yep the new spec of the FT790 is 0.16uV
[20:43] <rocketboy> the IC7000 was an impresive 0.11uV
[20:44] <rocketboy> thats about 3dB better
[20:44] <rocketboy> (2.7dB actually)
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[21:04] <SpeedEvil> Wacky.
[21:04] <SpeedEvil> 'SR-71 development began using a coal slurry powerplant'
[21:06] <Hiena> It was Lippish idea.
[21:12] <SpeedEvil> 'The crews' pressure-suit helmets would sometimes bang on the cockpit canopies until the initial unstart motions subsided.'
[21:13] <SpeedEvil> Sounds like a fun ride.
[21:23] <jnd> natrium42: shuttles rocket boosters and main tank are with sound, srb complete from liftoff to sea landing about 7 mins
[21:24] <rharrison1971> Right, one for you experianced ones. I'm wondering what the best camera angle is for if its fixed for a flight
[21:24] <SpeedEvil> Those are pretty.
[21:24] <rharrison1971> I'm thinkning about 25 degrees
[21:24] <SpeedEvil> For pictures, or panoramas?
[21:25] <SpeedEvil> If panoramas, then portrait oriented, with the horizon at 75% up the picture.
[21:26] <SpeedEvil> For the ground, similar, but the bottom of the camera FOV not quite pointed down, as some wobbles will take it past down
[21:26] <natrium42> yah
[21:26] <natrium42> don't point it down
[21:26] <natrium42> something near horizon is good
[21:27] <SpeedEvil> For one-off pretty pictures straight out horizontally is pretty good.
[21:27] <SpeedEvil> But won't give the best panoramas.
[21:27] <SpeedEvil> From what I've seen anyway.
[21:27] <rharrison1971> Ok IF 0 degrees is horizon I'm thinking 20 deg down
[21:29] <natrium42> sounds good
[21:29] <natrium42> it's going to rock around a bit, anyway
[21:29] <rharrison1971> Well somewhere between 10 and 20
[21:29] <natrium42> with any luck, you will be able to stitch full panorama
[21:30] <rharrison1971> Short of getting a protractor out I'm not that fussed. There is going to be a fair amount of occilation from the balloon
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[21:30] <rharrison1971> natrium42 who did your stitching
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[21:31] <rharrison1971> Did you do it yourself or did you use james. ( I think that was his name )
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[21:35] <natrium42> rharrison1971, me
[21:35] <natrium42> well, the program
[21:36] <natrium42> http://www.autopano.net/
[21:36] <rharrison1971> natrium42 nice one
[21:37] <natrium42> the problem was that my pictures weren't optimal
[21:38] <natrium42> most were taken pointing down
[21:38] <natrium42> so i had to use video frames
[21:50] <Laurenceb> hmm I have a usb to uart bridge that wont dissapear from my system
[21:51] <Laurenceb> if I unplug the cable, its still appearing under device manager
[21:51] <Laurenceb> and its unresponsive, any ideas?
[21:51] <Laurenceb> now device manager has crashed :(
[21:53] <Xenion> good night sleep well :D
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[22:18] <rharrison1971> edmoore you're back
[22:18] <edmoore> only just
[22:18] <edmoore> yes
[22:18] <rharrison1971> Did you slip a beer in
[22:19] <edmoore> a cheeky one. Though it's still incredibly early. I think my body clock has mislaid about three hours somewhere today
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[22:34] <natrium42> jcoxon! the man with a plan
[22:43] <rharrison1971> Evening jcoxon
[22:44] <rharrison1971> Got the camera script working just nicely using some customisable prarameters
[22:45] <rharrison1971> I'm all set for the w/e now and I just need you all to organise the weather in the UK. Thinking the butterfly effect etc...
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[22:49] <Laurenceb> this is bad
[22:50] <Laurenceb> each time I try to run the bootloader to reflash my radio, I get a CRC error
[22:50] <Laurenceb> then my usb to uart bridge becomes unresponsive
[22:51] <edmoore> Laurenceb: I hereby declare you to have a magic aura
[22:51] <edmoore> that disables all bootloading
[22:51] <Laurenceb> if I unplug the usb cable, it doesnt dissapear from the system
[22:51] <Laurenceb> I have to restart my machine
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[22:51] <Laurenceb> any ideas?
[22:51] <natrium42> get a mac
[22:51] <natrium42> lul
[22:51] <natrium42> which bridge is it?
[22:52] <Laurenceb> cp2102
[22:52] <natrium42> i use that one too
[22:52] <natrium42> didn't have problems
[22:52] <Laurenceb> I'm stuck for solutions
[22:52] <natrium42> on winxp
[22:52] <Laurenceb> yes
[22:52] <natrium42> where did you download the driver from?
[22:52] <gordonjcp> Laurenceb: can you unload just the kernel module for the USB bridge?
[22:53] <Laurenceb> the silabs site
[22:53] <Laurenceb> gordonjcp: how?
[22:53] <natrium42> Laurenceb, i used the sparkfun one
[22:53] <gordonjcp> "sudo rmmod cp2102"?
[22:53] <Laurenceb> ok
[22:53] <Laurenceb> its xp !!
[22:53] <gordonjcp> xp?
[22:53] <natrium42> that billg OS
[22:53] <Laurenceb> I'll swap it for the sparkfun one
[22:54] <Laurenceb> hmm where is it?
[22:55] <natrium42> sec
[22:55] <Laurenceb> oh its ok think I found it
[22:56] <natrium42> http://www.sparkfun.com/commerce/product_info.php?products_id=198
[22:56] <natrium42> bbl
[22:56] <gordonjcp> Laurenceb: oh, I don't know then, never tried it
[22:56] <gordonjcp> how do you load and unload modules in xp?
[22:57] <Laurenceb> arggg
[22:57] <Laurenceb> why in the hell is it on a password protected ftp server
[23:00] <Laurenceb> no luck :(
[23:04] <Laurenceb> this is really weird it worked fine yesterday
[23:07] <jcoxon> rharrison1971, oooo sun morning is very nice
[23:12] <Laurenceb> hmm I could reboot again, but no reason for it to work
[23:13] <Laurenceb> oh well here goes
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[23:28] <Laurenceb> hello
[23:28] <Laurenceb> think I solved it :P its the dodgy USB voltage on the laptop
[23:28] <gordonjcp> dude, buy a powered hub
[23:28] <Laurenceb> hehe
[23:29] <Laurenceb> I put the cp2102 into 3.3v mode and it worked ok
[23:30] <Laurenceb> code is on the wiki - http://wiki.ukhas.org.uk/code:radio
[23:36] <rharrison1971> jcoxon i'm looking at sunday morning
[23:36] <rharrison1971> nigts
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[23:46] <jcoxon> night all
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[00:00] --- Tue Oct 14 2008