highaltitude.log.20090227

[00:00] <natrium42> tea time
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[04:50] <sYx66-> must of been one hell of a tea :)
[04:53] <natrium42> :p
[04:53] <natrium42> g'nite
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[08:17] <jcoxon> morning
[08:17] <jcoxon> ping natrium42
[08:28] <jcoxon> i'm happy with transatlantic halo
[08:40] <jcoxon> bbiab
[08:50] <rjharrison> cool tranatlantic halo it is them
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[09:07] <rjharrison> morning all
[09:18] <G8KHW> morning
[10:01] <jcoxon> bacj
[10:01] <jcoxon> back*
[10:01] <jcoxon> had to go and fix my grandparent's computr
[10:02] <jcoxon> http://spacenear.us/gfs/2009-02-27-2.png :-)
[10:02] <jcoxon> cool flight trajectory
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[10:03] <SpeedEvil> The forecast follows what?
[10:04] <SpeedEvil> A massless particle?
[10:04] <SpeedEvil> or a parcel of air rather
[10:04] <jcoxon> a parcel of air
[10:04] <SpeedEvil> what would be interesting would be a forecast that enabled the use of vertical manoevering.
[10:04] <jcoxon> the models were originally designed for things like pollution and fall out
[10:05] <jcoxon> yeah
[10:05] <SpeedEvil> say one that modelled dropping or rising by 1Km and doing nothing every 10% of the flight
[10:08] <jcoxon> it might be easier if we get some data from a flight
[10:09] <edmoore> morning all
[10:10] <edmoore> rjharrison: iain just put a few pics up of the first prototype carbon fibre rocket that should fly this weekend, everything permitting http://www.srcf.ucam.org/~cuspaceflight/Martlet0.php
[10:10] <jcoxon> hey edmoore, cool rocket
[10:11] <edmoore> iain has been burning the midnight oil
[10:11] <jcoxon> ground launch i assume
[10:11] <edmoore> i went to see him in the dept in the early hours of the morning a couple of days ago, he was wearing a protective mask and looked like he'd been down a coal mine
[10:11] <edmoore> lots of CF dust floating about
[10:12] <jcoxon> hehe
[10:12] <jcoxon> its impressive work
[10:12] <edmoore> ground launch initially yeah
[10:12] <edmoore> it's not going to go insanely high - too light
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[10:15] <jcoxon> its very exciting
[10:15] <jcoxon> we've made some progress, natrium42 has got the balloons and his pcbs
[10:16] <edmoore> awesome
[10:16] <edmoore> any pics of the pcbs?
[10:16] <edmoore> natrium42: pics pics pics pics
[10:16] <jcoxon> haha
[10:16] <jcoxon> i think its quite early in canada right now, and he drove to US and back yesterday
[10:17] <edmoore> wow
[10:19] <jcoxon> busy week?
[10:19] <edmoore> annoyingly so
[10:20] <jcoxon> busy weekend/week ahead or have you escaped?
[10:20] <edmoore> well, launch all day on Sunday probably, so I should probably do some work tomorrow
[10:21] <jcoxon> wish the JS would sort itself out
[10:21] <edmoore> the second half of this term is basically abitch
[10:21] <jcoxon> its been an impressive few weeks of rubbish weather
[10:21] <edmoore> it's the last 4 weeks of the BA
[10:21] <jcoxon> nearly there :-)
[10:21] <jcoxon> of course - engineers have early exams
[10:21] <jcoxon> then they laugh at everyone else
[10:22] <edmoore> i'm looking forard to the laughing bit
[10:23] <jcoxon> one of the engineers after his exams sat outside catz library with a crate of beer and just drank and laughed at people
[10:24] <SpeedEvil> Prolly less laughing this year :/
[10:24] <edmoore> did he get shot?
[10:25] <jcoxon> he should of been
[10:25] <edmoore> should HAVE
[10:25] <jcoxon> haha
[10:25] <edmoore> sorry i got possessed briefly by a grammar spirit
[10:25] <jcoxon> forgot that you take issue with grammer
[10:26] <edmoore> that's really the only bit of grammar i take issue with in public spaces
[10:26] <edmoore> the rest I just quietly seethe
[10:26] <SpeedEvil> u r p3d4nt!
[10:27] Action: SpeedEvil sighs at the lack of imprisonment for murder of the english language.
[10:27] Action: jcoxon doesn't
[10:27] <edmoore> :p
[10:27] <jcoxon> languages evolve - if people get sloppy then thats the way its going to go
[10:27] <edmoore> right, I'm going to get some breakfast
[10:28] <jcoxon> hehe
[10:32] <edmoore> bbl
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[11:59] <edmoore_> hi G8KHW
[12:00] <edmoore_> it's likely to be a J210 rather than a J380 as Malcolm isn't coming up
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[12:23] <G8KHW> edmoore: Ah OK - I'll ask about and see if anyone has a J380 if U want
[12:26] <jcoxon> hey G8KHW, any progress with your tuner?
[12:30] <G8KHW> not really - Im waiting fro a replacement capacitor as one of the two they supplied was crap
[12:32] <G8KHW> also the plastic case I got from rapid was broken - so thats go to go back too
[12:33] <G8KHW> on the positive front the MFSK-16 code is really comming along
[12:35] <jcoxon> G8KHW, excellent about the code
[12:35] <jcoxon> how does it work with the transmitter itself?
[12:36] <G8KHW> tis in a pic chip - and just modulates the frequency using a DAC
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[12:37] <jcoxon> oh right, so even though its a CW transmitter you can still modulate teh freq?
[12:38] <G8KHW> yeah -its got varicap frequency control
[12:38] <Laurenceb> hi
[12:38] <jcoxon> G8KHW, oh cool
[12:38] <Laurenceb> G8KHW: you working on the HF tx ?
[12:38] <G8KHW> yep
[12:39] <jcoxon> oooo what do you two think of transatlantic halo as a name?
[12:39] <G8KHW> ok by me
[12:40] <Laurenceb> will be bad on google
[12:40] <SpeedEvil> I dunno
[12:40] <Laurenceb> probably .lots of xbox stuff
[12:40] <SpeedEvil> halo balloon
[12:40] <SpeedEvil> hits natrium42s site as first
[12:40] <jcoxon> those two combined though doesn't bring anything up in particular
[12:41] <SpeedEvil> And even the third link on transatlantic halo is a balloon
[12:41] <SpeedEvil> fifth even
[12:41] <SpeedEvil> http://home.hiwaay.net/~bbrown/
[12:42] <jcoxon> there is no reason why we can't jump to the top
[12:42] <SpeedEvil> http://home.hiwaay.net/~bbrown/hiball8.htm
[12:42] <SpeedEvil> yeah
[12:42] <jcoxon> spirit of knoxville was an awful name google wise
[12:42] <SpeedEvil> We need a basic website with keywords _right_now_
[12:42] <SpeedEvil> which we can all link to from our personal websites
[12:42] <jcoxon> agreed
[12:42] <jcoxon> i was going to register it now
[12:43] <SpeedEvil> and then click the 'reindex website' on goodle for our own website
[12:43] <jcoxon> as natrium has said yes
[12:43] <SpeedEvil> so we have it indexed and up the rankings before stuff happens
[12:43] <jcoxon> the question is where to put hyphens
[12:43] <SpeedEvil> transatlantic halo
[12:44] <jcoxon> i mean as a website address
[12:44] <SpeedEvil> mention it as the transatlantic-halo project, by foo, is a transatlantic halo balloon <link>
[12:44] <SpeedEvil> ah
[12:44] <jcoxon> transaltantichalo looks wierd
[12:44] <Laurenceb> http://picasaweb.google.com/henry.hallam/SRV1X02#
[12:44] <Laurenceb> thats some pretty cool stuff
[12:44] <Laurenceb> just needs the open gps :P
[12:44] <jcoxon> its the 'tichalo' bit
[12:44] <SpeedEvil> yeah
[12:45] <jcoxon> www.transatlantic-halo.com
[12:45] <SpeedEvil> Hmm.
[12:45] <jcoxon> i think that looks best
[12:45] <SpeedEvil> Random thought.
[12:45] <SpeedEvil> Might halo.com be interested in sponsoring?
[12:45] <jcoxon> doubt it
[12:45] <SpeedEvil> Welcome to HALO/LEE WAYNE your source for promotional products, branded merchandise, logo merchandise, executive gifts, trade show giveaways, awards, premiums, incentives, and corporate apparel!! We offer the industry's most extensive selection of promotional marketing solutions
[12:46] <SpeedEvil> It seems like the sort of project they might be very interested in - it's a great article for a tech magazine.
[12:47] <SpeedEvil> which might give you a domain to transatlantic.halo.com - but of course you wouldn't have control of it.
[12:47] <jcoxon> hmm its probably best to have control
[12:47] <SpeedEvil> yeah
[12:47] <jcoxon> as we'll be doing some heavy loading on it potentially
[12:47] <jcoxon> with tracker etc
[12:48] <SpeedEvil> http://www.halocatalog.com/item_choose.cfm?ProductCategoryName=Balloons&listing=ProductCategory&MasterCategoryGUID=7f4c59be-6226-11d4-8976-00105a7027aa&MasterCategoryName=Outdoors%2C Sports%2C and Leisure&CatalogGUID=1d2fa4f3-bc8d-4ace-9e44-5ee351603155&ClearListOrder=true&strip=0
[12:49] <jcoxon> hehe, they are a little small
[12:50] <SpeedEvil> Yeah - I was thinking they might be willing to sponsor for a few balloons like http://www.halocatalog.com/item_information.cfm?ClearListOrder=true&strip=0&CatalogGUID=1d2fa4f3-bc8d-4ace-9e44-5ee351603155&SupplierItemGUID=6BAC6348-F8D0-4F14-9921-831BDF188951&SuplItemNo=11RZS&SuplDisplayNo=1 Color%2F1 Side Imprint&clear=1&AcctGUID=A0FB37F1-C7AE-11D3-896A-00105A7027AA&ProdNo=1&ProdName=1&Description=1 tied to the payload forex.
[12:51] <SpeedEvil> but I don't think the website link would be best, as we don't have control of it, which would be bad.
[12:51] <jcoxon> right need to speak with natrium about how he wants to do the domain, i think he has some servers he has access to
[12:51] <jcoxon> if not i can use my normal host but they aren't as flexible
[12:55] <SpeedEvil> I can offer ~120M of disk only.
[12:55] <SpeedEvil> and not many gig of traffic.
[12:58] <jcoxon> or we could use spacenear.uk for tracking
[12:58] <jcoxon> spacenear.us*
[12:58] <gordonjcp> jcoxon: what do you need hosting for?
[12:58] <jcoxon> and then use transatlantic-halo for website and wiki
[12:59] <jcoxon> for the transatlantic balloon attempt website
[12:59] <SpeedEvil> UI don't see a pressing need for a domain.
[12:59] <SpeedEvil> Unless we're hoping for in-print or media ads
[13:00] <gordonjcp> I've got some space you can use if you want
[13:00] <jcoxon> hehe i just want to get a wiki up in the right place (i can't be arsed to move things at a later date)
[13:00] <SpeedEvil> If we're just hoping for referrals from slashdot/'digg/random blogs, then is there any point?
[13:00] <SpeedEvil> as a link is easy enough to click wherever it is.
[13:00] <gordonjcp> any particular wiki software?
[13:00] Action: SpeedEvil is liking tiddlywiki.com
[13:00] <SpeedEvil> but that's possibly not very suitable for this case
[13:01] <SpeedEvil> (downloadable javascript wiki)
[13:01] <jcoxon> i personally like dokuwiki
[13:01] <SpeedEvil> (which functions as alocal wiki, when downloaded)
[13:01] <jcoxon> i find that wikis are easier to work with from scratch rather then trying to reorganising other ones etc
[13:01] <jcoxon> so i just wanted to get something in place so that i can kick people more coordinately
[13:02] <gordonjcp> got a domain name?
[13:02] <jcoxon> not yet
[13:02] <jcoxon> waiting for natrium to reappear
[13:02] <gordonjcp> okay
[13:03] <SpeedEvil> One minor point - natriums site is already top for halo balloon
[13:03] <SpeedEvil> if the atlantic halo was on the same website, it'd be probablyt pushed up immediately.
[13:03] <jcoxon> he might want to do that
[13:04] <jcoxon> and have tracking on spacenear.us
[13:04] <SpeedEvil> atlantic balloon looks unlikely to be easy to get
[13:04] <jcoxon> oh no chance of that
[13:05] <jcoxon> but you are right about most traffic coming via links
[13:05] <SpeedEvil> transatlantic balloon - maybe. With a bit of work.
[13:05] <gordonjcp> is it easy to change the domain for dokuwiki after it's set up?
[13:05] <gordonjcp> like, it doesn't hardcode the domain anywhere?
[13:06] <jcoxon> not to my knowledge but i'm happy to wait a little bit
[13:09] <gordonjcp> well if you need a wiki set up give me a shout
[13:09] <Laurenceb> jcoxon: docuwiki is nice
[13:09] <Laurenceb> but itd be good to have something better for code
[13:11] <jcoxon> Laurenceb, as in some form of svn? or perhaps a google code
[13:11] <jcoxon> as that gives a svn + websvn
[13:12] <Laurenceb> hmm yeah
[13:12] <jcoxon> google code is really good though i don't like their wiki function
[13:16] <Laurenceb> ok, I'll look into it
[13:17] <Laurenceb> I looked into a MIR balloon (again)
[13:17] <Laurenceb> http://www.katco.eu/mandm.htm
[13:17] <jcoxon> laurence!
[13:17] <Laurenceb> if we could get hold of 10um polythene and use the 23um mylar from there
[13:18] <Laurenceb> a 6m diameter one may work
[13:18] <Laurenceb> its awsome :D
[13:18] <Laurenceb> thats fairly buildable imo
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[14:14] <fergusnoble> edmoore: going to HoM?
[14:14] <edmoore> working
[14:14] <edmoore> i'm not having the happiest life at the moment
[14:15] <Laurenceb> HoM?
[14:16] Action: SpeedEvil passes edmoore a party hat. Everything is better with a party hat!
[14:16] <edmoore> Laurenceb: history of maths
[14:16] <edmoore> best lecture course in cambridge (maybe)
[14:17] <SpeedEvil> 'From zero to hero?'
[14:20] <edmoore> fergusnoble: how've u been?
[14:33] <fergusnoble> edmoore: not too bad
[14:33] <fergusnoble> just got loads of work?
[14:34] <edmoore> loads and loads. the 2nd half of this term is basically the last 4 weeks before the BA, and it's pretty relentless
[14:34] <edmoore> can't wait for the summer term though, examless
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[14:45] <edmoore> bbl
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[15:07] <Laurenceb> history of maths ?!
[15:07] <Laurenceb> who cares about the history
[15:07] <Laurenceb> :P
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[15:28] <Laurenceb> wb ed
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[15:55] <hallam> hey all
[15:56] <hallam> fergusnoble: Do you/we have any 2x5 pin IDC-IDC cables made up?
[15:57] <Laurenceb> hi hallam
[15:58] <Laurenceb> any CUSF launches coming up soon?
[15:58] <hallam> carbon rocket launch on Sunday
[15:59] <hallam> star tracker test ~2 weeks
[15:59] <Laurenceb> wow cool
[15:59] <Laurenceb> ground from ears?
[15:59] <hallam> yes
[15:59] <Laurenceb> nice, I might come over on the train
[15:59] <hallam> cool, I expect someone can pick you up
[16:00] <Laurenceb> hybrid?
[16:00] <hallam> nah, just solid
[16:00] <hallam> but very lightweight
[16:00] <Laurenceb> ok, what altitude are you expecting?
[16:00] <hallam> 9500ft (airspace at 10k)
[16:00] <Laurenceb> nice
[16:01] <Laurenceb> anything onboard for recovery?
[16:01] <hallam> it's got the smallest motor that will fit and a ton of ballast to stop it busting the airspace
[16:01] <Laurenceb> hehe
[16:01] <edmoore> J210 :(
[16:01] <hallam> I'm bodging together an old Nova tracker right now
[16:01] <Laurenceb> ok, chute?
[16:01] <jcoxon> hallam, does it bring back memories
[16:02] <hallam> yeah, using the radio board from the ill-fated UKHAS flight actually
[16:02] <jcoxon> the one with cosine instead of sine?
[16:02] <hallam> let's hope this one lands somewhere friendlier because, as Iain put it, it could make a nasty hole in your car floor. After going through the roof.
[16:02] <Laurenceb> oh that
[16:02] <Laurenceb> hehe
[16:02] <jcoxon> which we waited hours for you to debug on the fly :-p
[16:02] <hallam> is that what it was? probably :P
[16:03] Action: Laurenceb is no longer convinced pulse shaping is needed
[16:03] <hallam> yeah I tend to agree, I think it helps a little but you're better off goign to some kind of MFSK
[16:03] <jcoxon> steve has made lots of progress with MFSK apparently
[16:03] <jcoxon> which is exciting
[16:04] <Laurenceb> oh cool
[16:04] <hallam> as in better than DominoEX?
[16:04] <Laurenceb> yeah it has fec and is faster
[16:04] <hallam> sexy
[16:05] <edmoore> domino has fec
[16:05] <edmoore> if you want it
[16:05] <hallam> just not much of it, right?
[16:05] <edmoore> what value of M is steve doing?
[16:05] <hallam> or is it decent
[16:05] <Laurenceb> the only problem with mfsk is keeping the seperation correct
[16:05] <edmoore> basic convolutional codes
[16:05] <Laurenceb> DominoEX is slow enough with no fec
[16:06] <hallam> What's the char/sec throughput of DominoEX?
[16:06] <edmoore> depends on the speed
[16:06] <Laurenceb> its limited to about 10
[16:07] <Laurenceb> I want to write my own mode
[16:07] <edmoore> dominoex specs a number of baud rates up to 22 baud
[16:08] <Laurenceb> yeah
[16:08] <edmoore> at 22baud it's about 140 wrods per min iirc
[16:08] <edmoore> so yeah, just over 10 chars a sec
[16:08] <edmoore> the FEC is about R2 i think so about 5 chars per sec with fec
[16:10] <edmoore> depending on the RX, we could quite easily code something probably much faster
[16:10] <edmoore> but there's something to be said for sticking to standards
[16:11] <Laurenceb> yeah
[16:11] <hallam> 10cps ought to be enough for most balloon work though
[16:11] <edmoore> easily
[16:11] <edmoore> i'm not sure what the issue is
[16:11] <Laurenceb> not for UAVs
[16:11] <hallam> go to a more compact protocol if you really want faster updates
[16:11] <Laurenceb> yeah
[16:12] <edmoore> we can write a much more efficient symbol code too if we actually cared, I'm sure
[16:12] <Laurenceb> or just send binary data
[16:13] <edmoore> an optimised code should be better than just raw binary
[16:13] <edmoore> in theory
[16:13] <Laurenceb> I'd have something along the lines of binary data with 6 or 7 bit characters
[16:13] <Laurenceb> then a parity bit
[16:13] <Laurenceb> and reed solomon the hole thing
[16:14] <Laurenceb> then transmit at 300 baud
[16:14] <Laurenceb> with bit stuffing
[16:14] <Laurenceb> should be enough for downlink from a UAV at 1Hz
[16:15] <edmoore> how much data do you need?
[16:15] <Laurenceb> ~40 bytes
[16:15] <Laurenceb> if its raw data
[16:16] <hallam> GPS state vector, airspeed, attitude?
[16:16] <Laurenceb> yes
[16:17] <Laurenceb> temperature, bat voltage, checksum, ground control status
[16:51] <Laurenceb> what time is the launch?
[16:57] <Laurenceb> edmoore: ping
[17:00] <edmoore> yo
[17:00] <edmoore> Laurenceb: rocket?
[17:00] <Laurenceb> yes
[17:00] <Laurenceb> I'm thinking I'll come over to watch/spectate :P
[17:00] <edmoore> not sure
[17:00] <edmoore> probs lunchtimeish
[17:01] <Laurenceb> ok
[17:01] Action: Laurenceb checks train times
[17:01] <edmoore> it's weather/cloud base dependant
[17:01] <Laurenceb> yeah
[17:02] <Laurenceb> theres one getting in at 10:30
[17:02] <Laurenceb> too late?
[17:03] <edmoore> probably not
[17:03] <Laurenceb> ok cool
[17:03] <Laurenceb> if I can catxch everyone as they're setting off thats cool - no faff
[17:04] <Laurenceb> whats the plan for recovery?
[17:04] <edmoore> you probably can - will let you know tomorrow if that's ok
[17:04] <edmoore> coming from surrey?
[17:04] <Laurenceb> yeah
[17:05] <Laurenceb> thanks
[17:06] <Laurenceb> chute and pop off nose ?
[17:08] <edmoore> i think so yep
[17:08] <edmoore> usual stuff
[17:08] <Laurenceb> cool
[17:08] <Laurenceb> and you think you'll be needing a radio?
[17:09] <edmoore> we're well covered on that front
[17:09] <edmoore> :)
[17:09] <Laurenceb> hehe
[17:09] <Laurenceb> will it be flying with a gps?
[17:10] <Laurenceb> hmm £22 not too bad
[17:13] <edmoore> i think it will be yes
[17:13] <Laurenceb> that should be pretty exciting
[17:21] <hallam> Fergus and I are just soldering the GPS together
[17:21] <hallam> it's a bit of a hack job but it should work
[17:21] <hallam> note this is not the software GPS, just a regular module + RTTY transmitter
[17:22] <Laurenceb> which module?
[17:22] <hallam> GS405
[17:22] <Laurenceb> ok
[17:22] <Laurenceb> ew sirf3
[17:23] <Laurenceb> but the helix is cool
[17:26] <Laurenceb> so is the plan to fly the add on board for the surveyor on the rocket?
[17:26] <Laurenceb> srv1x
[17:31] <hallam> no
[17:31] <Laurenceb> ok
[17:31] <Laurenceb> seems sensible
[17:31] <hallam> this rocket = GS405 module + old tracker
[17:31] <Laurenceb> yeah I mean for the altitude attempt
[17:31] <hallam> next rocket flight = custom-designed software gps test board + SRV1 (no addon board)
[17:32] <hallam> altitude attempt = similar to that, but smaller gps board
[17:32] <Laurenceb> I took a look at using mems gyros for an n prize attempt - I think its possible
[17:33] <hallam> I've heard talk about problems with the vibrating bit sticking to the floor due g
[17:33] <Laurenceb> hmm yeah I couldnt find enough data on virbration effects
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[17:50] <Laurenceb> AD have some good data
[17:50] <Laurenceb> guess it really depends on the miotor ect
[17:51] <Laurenceb> anyway, cya all
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[18:05] <Hiena> Good evening for all!
[18:05] <Hiena> i have a question.
[18:06] <Hiena> We faced a trouble in the university with a GPS-MICE.
[18:07] <Hiena> These are simple POLSTAR GPS receivers, supported the basic NMEA operation, and working well on the airplanes.
[18:09] <Hiena> The problem is, the guys at the university bought a radiomodem module for the telemetry, but it's not support the 4800 baud speed. I offered my PIC serial burst schematic, but they don't want to waste time waiting for the PCB.
[18:12] <Hiena> The question is: There is a NMEA code to switch the receiver to the 9600 speed, but the guys says that didn't works. My guess is they has a problem calculating the checksum.
[18:13] <Hiena> $PSRF100,<protocol>,<baud>,<DataBits>,<StopBits>,<Parity>*CKSUM<CR><LF>
[18:33] <SpeedEvil> is it actually being sent? No flow control problems?
[18:48] <Hiena> Well, hey tried the $PSRF100,1,9600,8,1,0*0D<CR><LF>
[18:49] <Hiena> They checksum calculation seems valid, yet the GPS answered nothing.
[18:49] <hallam> Does the documentation for that particular receiver say that it will accept that NMEA message?
[18:50] <Hiena> The dcumentations says, the receiver accept all NMEA standard code.
[18:51] <hallam> I'm not sure, but I was under the impression that there are no real standards for NMEA messages instructing a receiver to change baud rate etc - they tend to be manufacturer-specific
[18:51] <hallam> Can you find out which chipset the receiver uses?
[18:54] <Hiena> The receiver POLSTAR PGM-248A and PGM-268. The 248A based on SonyCXD2951GA-4, the 268 based on SiRFstarIII
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[18:56] <Hiena> Both supports the NMEA0183 protocol.
[18:56] <hallam> not sure about the sony, bit the sirfIII can definitely be switched into 9600 baud by sending it a message in the sirf protocol
[18:57] <Hiena> Yup.
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[19:14] <hallam> fergusnoble: about?
[19:14] <fergusnoble> yup
[19:15] <fergusnoble> whats up?
[19:15] <hallam> trying to get fldigi to work
[19:16] <edmoore> hallam: which os?
[19:17] <fergusnoble> hallam: whats the problem?
[19:17] <fergusnoble> edmoore: windows of course
[19:17] <edmoore> he has ubuntu on his laptop. you never know
[19:17] <fergusnoble> edmoore: henry wouldnt use any of that free shit :p
[19:18] <hallam> windows, it loads fine, but I'm not having much luck doing the receiving
[19:19] <hallam> might just be the lack of audio cable
[19:19] <hallam> but it used to work okay on truetty
[19:19] <edmoore> audio cable? fr girls
[19:19] <edmoore> just put the readio speaker near the mic
[19:19] <hallam> actually Ferg, can you hear anything on 434.650?
[19:19] <hallam> right that's what I was doing
[19:21] <fergusnoble> hallam: 1 sec
[19:21] <fergusnoble> ok, try transmitting
[19:21] <hallam> it is
[19:22] <fergusnoble> got it, just seems to be pulsing
[19:22] <hallam> those are the zeros I think
[19:23] <hallam> should be 300 baud
[19:24] <fergusnoble> just looking for the audio cable
[19:25] <fergusnoble> 8bit ascii?
[19:26] <hallam> yes
[19:26] <fergusnoble> 8n1?
[19:26] <hallam> yes
[19:26] <hallam> how do you get fldigi to invert bits?
[19:27] <fergusnoble> the RTTY is USB option
[19:27] <fergusnoble> iirc
[19:27] <hallam> ok
[19:27] <hallam> and turn AFC off?
[19:28] <fergusnoble> sounds just like a constant tone now
[19:29] <fergusnoble> can you narrow the shitf by a tiny amount?
[19:29] <hallam> ok i'll try
[19:31] <fergusnoble> it went mental while you were turning it
[19:31] <fergusnoble> i think you made it wider
[19:31] <hallam> sorry I'll keep fiddling
[19:31] <hallam> it's a bit hard to tell
[19:31] <hallam> I'll have it transmit 0x55
[19:32] <fergusnoble> or RYRYRYRYRY
[19:32] <fergusnoble> is recognisable and standard
[19:32] <fergusnoble> old scool
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[19:32] <fergusnoble> i think i can hear you programming it?
[19:32] <Laurenceb> HELLO
[19:33] <fergusnoble> Laurenceb: HI!!!111
[19:33] <Laurenceb> OMG
[19:33] <Laurenceb> !!!111cos(0)
[19:34] <edmoore> Laurenceb: die
[19:34] <edmoore> over in the corner
[19:34] <edmoore> go on
[19:35] <Laurenceb> like omygod thats so nasty :(
[19:35] <edmoore> enthought python distribution = no more facking around with matplotlib dependancies. fergusnoble: I am going to force myself away from matlab
[19:36] <fergusnoble> hallam: i just have carrier atm
[19:36] <fergusnoble> edmoore: yeah, enthought is good
[19:36] <fergusnoble> thats what im using
[19:36] <hallam> hang on I think something is not quite right
[19:36] <hallam> lemme fiddle, I'll tell you when to try again
[19:37] <edmoore> fergusnoble: yeah, certainly seems easier than building absolutely everything, which has got a little tiresome I must admit, especially as I want it just to do some work rther than to mess about
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[19:38] <fergusnoble> well the most annoying thing is that macports requires you to build the entire gcc toolchain before you can install any python stuff
[19:38] <fergusnoble> even if you have xcode installed
[19:38] <edmoore> noticed that
[19:38] <edmoore> octave took about a month of fan whirring to get on
[19:38] <Laurenceb> zhehe
[19:39] <edmoore> i do now have the fortran compiler though
[19:39] <edmoore> lucky me
[19:39] <Laurenceb> yeah thats what sucks with octave
[19:39] <edmoore> had to get it for scipy
[19:39] <edmoore> man they have a sucky server
[19:39] <edmoore> 200kbps download
[19:40] <edmoore> fergusnoble: do you use safari?
[19:40] <fergusnoble> yeah
[19:41] <edmoore> have you tried 4 beta? it's more like chrome (tabs on top) and lets you look at histories/favs etc in a coverflow sort of way
[19:50] <fergusnoble> nope, might check it out
[19:53] <fergusnoble> hallam: will start cooking
[19:54] Action: Laurenceb tapes a chicken to his cpu
[19:55] Action: SpeedEvil bastes the chicken in lemon and herbs.
[20:00] <hallam> I think something is very wrong with my microphone
[20:02] <Laurenceb> do you guys have any spare balloons?
[20:02] <edmoore> a 1.5 i think?
[20:02] <Laurenceb> as in for sale
[20:02] <SpeedEvil> Post office survey. 'With regards to marketing messages, I no longer find receiving these by email exciting when compared to receiving items of Direct Mail.'
[20:02] <Laurenceb> just thinking for launching the mini rogallo
[20:02] <SpeedEvil> ...
[20:02] <edmoore> we're about to get a whole bunch from steve
[20:03] <Laurenceb> cool
[20:03] <Laurenceb> what size?
[20:03] <edmoore> various including 3kg
[20:03] <Laurenceb> ok - I only need something really small unless its going on some joint launch
[20:03] <edmoore> how much does the rogallo weigh?
[20:04] <edmoore> I'm not totally averse to the idea of giving people a hitch up
[20:04] <Laurenceb> ~500 grams
[20:04] <edmoore> it's cutdown data points if nothing else
[20:04] <Laurenceb> problem is its on 434.075 MHz
[20:04] <edmoore> no problem
[20:04] <Laurenceb> which seems to be what everyones going for
[20:04] <Laurenceb> ok
[20:04] <edmoore> we'll just go on 650
[20:04] <Laurenceb> cool
[20:04] <Laurenceb> thats legal?
[20:05] <Laurenceb> dont you mean 868?
[20:05] <edmoore> and also the radiometrix b/w is so wide anyway you can fit several streams down on the same module freq
[20:05] <edmoore> just centred on different IFs
[20:05] <edmoore> 434.650
[20:05] <Laurenceb> yeah, if you shift it
[20:05] <Laurenceb> cant do that on my board really
[20:05] <Laurenceb> ah got you
[20:05] <Laurenceb> sorry
[20:06] <hallam> my sound card just seems to be super lame
[20:07] <Laurenceb> interesting
[20:07] <hallam> fergusnoble: try now, at 50 baud
[20:07] <Laurenceb> whats the problem?
[20:07] <hallam> it's like something keeps adjusting the mic gain
[20:07] <Laurenceb> I cant get RTTY to work on my laptop
[20:07] <Laurenceb> hmm
[20:07] <Laurenceb> mines like a timing jitter
[20:17] Action: Laurenceb suspects the conversation has moved to RTTY
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[20:24] <hallam> yeah something on my PC is turning the mic gain down
[20:28] <fergusnoble> hallam: i can try again now iuw
[20:28] <hallam> ok
[20:28] <fergusnoble> hallam: but food in like 20mins
[20:28] <hallam> shall I come over then?
[20:28] <hallam> it seems to enormously suck on my computer for some reason
[20:29] <fergusnoble> iuw
[20:29] <hallam> I think something is trying to be clever
[20:29] <hallam> ok I'll be there in 5 mins
[20:29] <fergusnoble> oh right, like an agc type thin
[20:29] <fergusnoble> give the tracker a blast though
[20:30] <fergusnoble> hallam: its working
[20:30] <fergusnoble> but the spectrum looks fucked
[20:31] <fergusnoble> its like a solid band rather than two clear tones
[20:31] <fergusnoble> maybe its just because of the shift or something
[20:31] <fergusnoble> are you pulse shaping?
[20:31] <hallam> yeah
[20:32] <hallam> I'll change it not to
[20:32] <Laurenceb> how are you controlling the swing?
[20:32] <fergusnoble> ok, maybe thats it
[20:32] <hallam> is it sending NMEA strings?
[20:32] <fergusnoble> hallam: no, just RY
[20:32] <hallam> ok
[20:33] <fergusnoble> so did you say the dac is only 4 bit? because it does look like there are a series of bands in the spectrum
[20:35] <fergusnoble> my amp has turned up so just going to pick it up
[20:35] <Laurenceb> you using pic?
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[22:28] <Laurenceb> hello
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[00:00] --- Sat Feb 28 2009