highaltitude.log.20060424

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[01:48] <macfreak4> anyone still on?
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[10:08] <defy> hey :) so it works well huh
[10:08] <malgar> ?
[10:09] <defy> sorry, was asking jcoxon about his gps
[10:09] <malgar> ok
[10:12] <jcoxon> oh hey defy
[10:12] <jcoxon> and malgar
[10:12] <jcoxon> yes/no
[10:12] <jcoxon> it does work well
[10:12] <jcoxon> but as it has no aerial it doesn't actually get a position
[10:13] <defy> ah my next question was going to be what aerial are you using :P
[10:13] <jcoxon> but with gpsd it was a matter of directing it to the right port (ttyS2)
[10:13] <jcoxon> not sure what yet
[10:13] <defy> cool
[10:13] <jcoxon> its got one of those aerial socket plug thingys
[10:13] <defy> yea
[10:13] <jcoxon> but the small version
[10:14] <jcoxon> i'll keep looking
[10:14] <jcoxon> also whats cool is that it runs of the usb for power
[10:14] <jcoxon> and with a bit of adaption fits my waysmall case
[10:15] <defy> sweet
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[10:17] <jcoxon> hey phatmonkey
[10:17] <phatmonkey> hey
[10:17] <jcoxon> 6 people on the channel - not bad
[10:19] <malgar> :)
[10:19] <phatmonkey> yep!
[10:26] <jcoxon> hehe
[10:36] <borism> :)
[10:36] <jcoxon> hey borism
[10:36] Action: jcoxon has to stop saying hi to everyone
[10:38] <borism> hello hello
[10:40] <jcoxon> borism, i've forgotten - are you working on a project?
[10:43] <borism> not yet... i plan to order gumstix and some rc plane and to start experimenting with them...
[10:44] <jcoxon> ooo cool
[10:44] <jcoxon> will it be a high or low altitude project?
[10:45] <borism> :) low to begin with
[10:45] <borism> but it's inspired by pegasus which holds altitude record afaik
[10:46] <jcoxon> nah pegasus is low!
[10:46] <jcoxon> UTARC have got 115,942!
[10:46] <defy> whats your ideal alt jcoxon?
[10:46] <malgar> gasp
[10:46] <jcoxon> 75,000
[10:47] <defy> nice
[10:47] <jcoxon> oh everyone, could you sign up on UKHAS website
[10:47] <jcoxon> even if you aren't based in the UK
[10:47] <jcoxon> and that gives me an idea for a new page: Records
[10:49] <borism> oh, not pegasus but helios >(
[10:49] <jcoxon> aaarrrgghhh
[10:50] <jcoxon> didn't helios crash
[10:50] <borism> it did
[10:51] <borism> It sustained flight at above 96,000 feet (29,250 m) for forty minutes, and at one time it flew as high as 96,863 feet (29,524 m).
[10:51] <jcoxon> thats high
[10:51] <jcoxon> very high
[10:58] <jcoxon> thanks defy :-D
[11:03] <defy> :)
[11:14] <phatmonkey> jcoxon: how about we try and go as high as possible?
[11:14] <jcoxon> hehe
[11:14] <phatmonkey> really really light with really big balloon methinks
[11:14] <phatmonkey> or rocket of course........!
[11:14] <jcoxon> well i've been thinking about this
[11:15] <jcoxon> over the summer the cambridge nova project will be about long duration balloons
[11:15] <jcoxon> the plan is to get a 5 day flight by the end of the summer
[11:15] <jcoxon> but pegasus will still be going
[11:15] <jcoxon> parallele
[11:15] <jcoxon> and still needs an aim!
[11:25] <jcoxon> perhaps altitude is our aim
[11:35] <phatmonkey> yes
[11:36] <phatmonkey> we neeeed communication though
[11:36] <jcoxon> hmmmm
[11:36] <jcoxon> well you're not going to get it in the near future
[11:37] <jcoxon> though i do have a new idea for a little help in tracking a payload
[11:37] <phatmonkey> my friend is a pretty handy programmer in the mac cocoa stuff, and he's started coding a monitoring program
[11:37] <phatmonkey> but it would be a little pointless without communication, so he's stopped for now
[11:37] <jcoxon> try and pester ofcom
[11:37] <jcoxon> but they just won't change the rules
[11:37] <phatmonkey> we need to get backing
[11:38] <phatmonkey> loads of people together... maybe ukhas is the answer
[11:38] <jcoxon> well there are a suprisingly large amount of people interested
[11:38] <phatmonkey> and people who know about ham radio
[11:38] <phatmonkey> I know two people who are in to ham radio
[11:38] <jcoxon> the Nova project will join UKHAS when their leader gets back from uni
[11:38] <jcoxon> back to*
[11:38] <phatmonkey> one is this guy who tracks satellites.... I must ask him!
[11:38] <phatmonkey> I will send an email now
[11:38] <phatmonkey> nice
[11:38] <jcoxon> and Pete from Project SOAR said he will join
[11:39] <jcoxon> and he is a HAM expert
[11:39] <phatmonkey> yes, great
[11:39] <jcoxon> he is the guy pestering ofcom
[11:39] <jcoxon> but its just not enough
[11:47] <phatmonkey> whee, I would enjoy a speed record too
[11:47] <phatmonkey> have some sort of freefall payload
[11:47] <phatmonkey> with a deployable parachute
[11:48] <jcoxon> not sure they'll be happy over the UK
[11:48] <jcoxon> hehe
[11:48] <phatmonkey> just hope the parachute works though, or it'll make a big hole in the ground
[11:48] <phatmonkey> haha
[11:48] <phatmonkey> maybe in africa :o
[11:49] <phatmonkey> or a self destruct mechanism if the parachute fails! even better! :D
[11:49] <jcoxon> well perhaps when we get funding
[11:49] <jcoxon> hmmm explosions in the sky
[11:49] <phatmonkey> great fun
[11:49] <phatmonkey> nova is a cambridge project isn't it?
[11:49] <jcoxon> yup
[11:49] <jcoxon> backed by the uni as well
[11:49] <phatmonkey> one more reason to join cambridge I guess...
[11:50] <jcoxon> hehe
[11:50] <jcoxon> by the time you are here it should be very advanced
[11:50] <jcoxon> :-D
[11:51] <jcoxon> oooooooooooooooooooooooooooooooooooooooo
[11:51] <phatmonkey> I've got this book on how to get into oxbridge, it just looks like a bunch of things they look out for, and if you do all of it, you normally get it
[11:51] <phatmonkey> ... good grades is one of them :<
[11:51] <jcoxon> :-D
[11:51] <jcoxon> http://www.ofcom.org.uk/radiocomms/isu/ukfat/
[11:51] <jcoxon> download the freq allocation table pdf
[11:51] <jcoxon> page 80
[11:52] <phatmonkey> wowza
[11:52] <phatmonkey> I'm guessing those are orbital amateur satellites they're talking about though
[11:53] <jcoxon> yeah but go back 2 pages
[11:53] <phatmonkey> interesting...
[11:53] <phatmonkey> ashley will know a lot about this, I'll ask him
[11:54] <jcoxon> please do
[11:54] <phatmonkey> I really want to get some sort of glider up in the air these summer holidays
[11:54] <phatmonkey> it is a killer thing for getting into cambridge I guess
[11:54] <jcoxon> about time :-D
[11:54] <jcoxon> well if you are clever to which college you apply to it should be easy
[11:54] <phatmonkey> if I say I have sent a glider up to the edge of space on a weather balloon and written an autopilot for it to fly back to base
[11:54] <phatmonkey> they're not just gonna look over it...
[11:55] <jcoxon> e.g. my college St Catharine's one of the fellows is in charge of the Atmospheric Chemistry Department
[11:55] <phatmonkey> not every 16 year old does something like that o0
[11:55] <jcoxon> i'm going with him to Niger
[12:01] <phatmonkey> As you might know, I am working (slowly) on a high altitude balloon project ( http://glider.phatmonkey.org.uk/ ). I have been working with somebody else who has done a similar project ( http://www.srcf.ucam.org/~jac208/pegasus/ ) and we've just started a society in the UK for this sort of thing: http://www.ukhas.org.uk/ .
[12:01] <phatmonkey> We have been thinking about ways to communicate with the balloon while it is in the air so we can monitor its health and position for recovery. Sending a text message is terribly unreliable (see Pegasus II above!). It looks like using amateur radio in the air isn't a possibility, but there is a project to get the law changed ( http://www.soar.org.uk/ ). It looks like it hasn't been particularly successful though.
[12:01] <phatmonkey> Can you think of any ways we could communicate with our balloon? Any obscure frequencies we could use? Maybe directional antennas that could automatically track the balloon? We are almost out of ideas! Remember it needs to reach 20+ miles line of sight in the air, preferably with two way data transfer.
[12:01] <phatmonkey> Ben
[12:01] <jcoxon> yup
[12:01] <jcoxon> good
[12:02] <phatmonkey> sent!
[12:02] <phatmonkey> time to get on with coursework and revision, sigh
[12:02] <jcoxon> i've got to finish this damn essay
[12:02] <jcoxon> far to easily distracted
[12:03] <phatmonkey> tell me about it
[12:03] <phatmonkey> hah
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[12:17] Action: defy ponders running his gumstix from batteries for the first time
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[12:49] <jcoxon> bbl
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[14:13] <jcoxon> oooo 7 people now
[14:13] <jcoxon> and phatmonkey was here earlier
[14:13] <jcoxon> tis a good day :-D
[14:22] <mark_fiirestone> cool. i like good days.
[14:22] <mark_fiirestone> i'm trying to resist ordering a waysmall computer
[14:23] <mark_fiirestone> resist...resist...resist... credit card is calling me...
[14:24] <jcoxon> hhe
[14:25] <jcoxon> well i have my gumstix connex 200 with gpstix right in front of me
[14:26] <jcoxon> i'm debating whether to dump using digital cameras and move to film for pegasus III
[14:26] <jcoxon> i know that sounds made
[14:26] <jcoxon> but
[14:26] <jcoxon> its a hell of a lot cheaper potentially
[14:29] <mark_fiirestone> you'd get better pictures on film, i bet
[14:29] <defy> do both :P
[14:30] <mark_fiirestone> they like you, I have to pay $179
[14:30] <jcoxon> hmmm tis tought
[14:30] <jcoxon> tough*
[14:30] <mark_fiirestone> how much amps does that thing draw. there is a single chip/board pc on ebay for £5
[14:30] <mark_fiirestone> http://cgi.ebay.co.uk/Vortex86-6070-Micro-PC-Car-PC-Embedded-Computer_W0QQitemZ6872773513QQcategoryZ1244QQssPageNameZWDVWQQrdZ1QQcmdZViewItem
[14:31] <mark_fiirestone> it draws 850 milliamps (it says)
[14:31] <mark_fiirestone> be a damn sight cheaper...
[14:31] <jcoxon> wow, that is cool
[14:32] <mark_fiirestone> in fact, I think I will bid on it.
[14:32] <jcoxon> at that price you might as well
[14:33] <mark_fiirestone> oh ya, I patched bloggage, it no longer has a sql injection vulnerability... :)
[14:33] <jcoxon> well a gumstix is 80x35 with board
[14:33] <jcoxon> and i run mine off 3AAAs
[14:34] <jcoxon> i'm not sure what amps a gumstix draws
[14:34] <mark_fiirestone> really, i bet it uses a lot less than 880mA
[14:34] <jcoxon> probably
[14:35] <jcoxon> draws <250 mA at 400MHz without Bluetooth
[14:35] <jcoxon> draws <50 mA while waiting for input (not even sleep mode)
[14:36] <mark_fiirestone> that's far far less..
[14:36] <jcoxon> and for me at least most of the time its waiting for input
[14:36] <jcoxon> doesn't need to do much processing
[14:37] <mark_fiirestone> will have to think about it. i don't know how many / type batteries i'd need to power that thing with a 5v regulator.. hmmm...
[14:39] <jcoxon> i do think at 5 pounds and 99p p&p its pretty damn good
[14:39] <jcoxon> right i'll be back later
[14:44] <mark_fiirestone> okeydoke
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[17:59] <malgar> jcoxon,
[18:05] <jcoxon> hey
[18:05] <malgar> tomorrow i'll try an ultracheap launch... the classical balloon+mail
[18:06] <malgar> +tracking with binoculars
[18:06] <jcoxon> ooo cool
[18:06] <jcoxon> good idea
[18:07] <malgar> eheh old and simple
[18:07] <jcoxon> release say 2
[18:07] <malgar> 2 balloons? that is not a bad idea
[18:08] <jcoxon> interesting to see if they land in the same direction
[18:08] <jcoxon> don't forget to stick a stamp on the mail so that its easy to return
[18:08] <malgar> or thinking a way to release multiple mails after the burst
[18:08] <malgar> oh yes.. i put also my cell phone number and email
[18:09] <jcoxon> make a parachute out of a bin liner
[18:10] <malgar> but it should open itself when the balloon wil burst
[18:10] <defy> how high do you guys reckon they get before popping?
[18:10] <defy> just party balloons yea?
[18:10] <jcoxon> not that high
[18:11] <malgar> tomorrow yes, will be party balloons
[18:11] <defy> cool
[18:11] <jcoxon> good to see
[18:11] <malgar> jcoxon, how much do you think it can go high?
[18:12] <jcoxon> hmmm 1000ft
[18:13] <malgar> and still don't know what kind of balloon will be. Tomorrow i'll go to a festival near here and i will buy them there
[18:13] <jcoxon> don't go for foil
[18:13] <malgar> usually they are not latex ballons :\
[18:13] <jcoxon> doubt it'll stretch as much
[18:13] <jcoxon> well if you can
[18:14] <jcoxon> also do one where one balloon is linked to a less filled balloon
[18:15] <malgar> another question.. the festival is 200m above sea level.. but my home is 800m above sea level... is better that i will launch it from 200m eh?
[18:16] <jcoxon> not sure you'll get much difference
[18:16] <jcoxon> in theory the balloon will expand from 200 to 800
[18:16] <malgar> no, my fear is that could explode
[18:21] <jcoxon> not sure
[18:40] <defy> hrm, gumstix + netmmc + robostix lasted for about 2 hours on 4 semi charged AA's..not too bad
[18:42] <jcoxon> not bad at all
[18:43] <defy> you wouldn't know the maximum voltage these things can handle through their regulators would you?
[18:45] <jcoxon> http://www.gumstix.org/tikiwiki/tiki-index.php?page=Gumstix
[18:45] <jcoxon> though a robostix is 5v i think
[18:45] <defy> sweet, cheers
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[20:48] <robhouse> hi
[20:48] <jcoxon> hey robhouse
[20:48] <jcoxon> hows it going?
[20:48] <robhouse> good thanks
[20:49] <robhouse> I here you have your new gumstix :D
[20:49] <robhouse> *hear
[20:49] <jcoxon> yes :-D
[20:49] <jcoxon> very happy
[20:49] <robhouse> cool
[20:49] <robhouse> did you win that 500gm balloon on Ebay the other day?
[20:49] <jcoxon> yeah
[20:50] <jcoxon> its a funny colour
[20:50] <jcoxon> hehe
[20:50] <robhouse> is it any good?
[20:50] <jcoxon> haven't opened it but i'm sure it will be
[20:50] <robhouse> I see that gut has another for sell. Nobodys bid on it yet...
[20:51] <robhouse> *guy
[20:51] <robhouse> I really can't type this evening :(
[20:51] <jcoxon> hehe
[20:51] <jcoxon> hows your project going?
[20:51] <jcoxon> any rocket launches recently?
[20:52] <robhouse> I've not done too much, I was gonna give my GPS / Phone system a better test yesterday, but got rained off :(
[20:52] <robhouse> Hopefully I'll be able to get it in the air next weekend.
[20:52] <jcoxon> cool
[20:52] <jcoxon> is it still a demo?
[20:53] <malgar> robhouse, where do you live?
[20:53] <robhouse> I've got the full version of the software now and it seems to work pretty well. It sends me gps co-ordinates and seems to do a good job of logging NMEA0183 data to MMC card.
[20:53] <jcoxon> wow
[20:53] <jcoxon> no need for a gumstix
[20:53] <robhouse> I live in Hampshire, England, UK
[20:53] <robhouse> The gumstix has a lot of other advantages - GPIO for example
[20:53] <jcoxon> true
[20:54] <robhouse> plus its linux :D
[20:54] <jcoxon> yeah
[20:54] <jcoxon> need to find an aerial for hte gps
[20:54] <robhouse> oh right, what sort of connector does it need?
[20:55] <jcoxon> well its the small aerial type
[20:55] <robhouse> ok
[20:55] <jcoxon> with the central pin
[20:55] <robhouse> I see the GPSstix retails for $130!
[20:55] <jcoxon> yeah
[20:55] <jcoxon> well i guess its the cost of hte gps unit
[20:56] <robhouse> still, given the size of it, its actually not that badly priced.
[20:56] <robhouse> How many channels is it?
[20:56] <jcoxon> not actually sure
[20:56] <jcoxon> hehe
[20:57] <robhouse> Any indication what chipset it is?
[20:58] <jcoxon> its a ublox
[20:59] <robhouse> ok :s
[20:59] <robhouse> Ah, google has enlightened me
[20:59] <jcoxon> think its this one
[20:59] <jcoxon> http://www.u-blox.com/products/lea_la.html
[21:00] <jcoxon> which means 16 channels
[21:00] <robhouse> Looks pretty sweet
[21:00] <jcoxon> yeah
[21:00] <jcoxon> obviously they went for a good quality one
[21:01] <jcoxon> right i have to go
[21:01] <robhouse> yeah, it looks a good spec
[21:01] <jcoxon> will be back after watching sharpe :-D
[21:02] <robhouse> EUR 85.00 (Exclusive V.A.T.) for the GPS chipset
[21:02] <robhouse> ok
[21:03] <robhouse> http://cgi.ebay.co.uk/RARE-World-War-2-Meteorological-Weather-Balloon-boxed_W0QQitemZ6623356954QQcategoryZ585QQssPageNameZWDVWQQrdZ1QQcmdZViewItem
[21:03] <robhouse> A vintage weather balloon from December 1944!!!
[21:10] <malgar> loool
[21:10] <malgar> ehehe
[21:14] <robhouse> Malgar: where are you based ?
[21:14] <malgar> alps, nothern italy
[21:14] <robhouse> cool
[21:21] <malgar> i have to think a way to recover the payload of the balloon.. here there are high trees forests everywhere... :\
[21:21] <robhouse> :(
[21:22] <robhouse> I've had that issue recovering rockets before
[21:22] <malgar> any ideas?
[21:24] <robhouse> The trees I've had to deal with probably weren't as tall. I've used various different methods. I have a extending fibreglass pole, thats goes to about 8m. I've taped a single hook on the end and this can be useful for pulling stuff out at lower heights.
[21:25] <robhouse> Another alternative is to have a long length of string with a weight on 1 end. You have to through the weight over a branch and then try and shake the rocket loose or bend/break a branch until it comes into reach.
[21:25] <robhouse> Failing that I've known people give tree climbing a go.
[21:26] <malgar> here the trees can be even 40-50meters high
[21:27] <malgar> and very close each other
[21:27] <malgar> uhm
[21:27] <malgar> i have to think well these stuffs
[21:30] <robhouse> yeah :(
[22:27] <jcoxon> hey guys,
[22:27] <jcoxon> i'm back
[22:34] <robhouse> hi
[22:35] <robhouse> I was reading about a rockoon earlier today and apparently they launched the rocket straight through the balloon once it reached a certain altitude
[22:35] <jcoxon> yeah i've read that as well
[22:35] <jcoxon> best way of doing it?
[22:35] <robhouse> I was thinking about making a small tube-launched rockoon.
[22:36] <jcoxon> well if you need a flight to launch it on i'm very happy to help
[22:36] <jcoxon> this summer will be doing over 20 launches
[22:36] <robhouse> I thought I could use a timer or some timed-fuse to ignite the rocket at an altitude where it be visible
[22:36] <robhouse> cool
[22:37] <jcoxon> could launch it from the side of a payload
[22:37] <jcoxon> use the flight computer and a GPIO to set it off
[22:38] <jcoxon> (oh welcome to UKHAS)
[22:39] <robhouse> yeah
[22:39] <robhouse> hehe, thanks
[22:39] <jcoxon> oops
[22:39] <jcoxon> i sent an email to the gumstix mailing list asking about hte connector for the gpsstix
[22:39] <jcoxon> and got this in reply:
[22:39] <jcoxon> shhh. check the detail in our PR coming out tomorrow am.
[22:39] <jcoxon> Don
[22:39] <jcoxon> directly
[22:40] <robhouse> hehe
[22:40] <jcoxon> though it looks like he actually sent it to the whole list
[22:40] <jcoxon> (i'm actually allowed to talk about it - i asked in advance
[22:40] <jcoxon> )
[22:44] <robhouse> hehe, hopefully the PR will answer your questions
[22:44] <jcoxon> got my answer
[22:44] <jcoxon> hehe good old gumstix people
[22:44] <jcoxon> its an SMA
[22:45] <jcoxon> and hte module is a LEA-4H
[22:45] <jcoxon> apparently people said they would rather the extra sensitivity
[22:45] <jcoxon> guess its for high precision robotics
[22:46] <robhouse> cool
[22:48] <robhouse> A sample LEA-$H is EUR 85, so the gumstix seems pretty good value
[22:49] <jcoxon> yeah
[22:49] <jcoxon> for what you get gumstixs are good value
[22:49] <jcoxon> and the fact you can buy single ones
[22:49] <robhouse> yeah
[22:49] <jcoxon> unlike most embedded systems that require bulk buying
[22:50] <robhouse> I'm currently trying to put an idea together for my dissertation next year. Gonna see if I can incorporate a gumstix into it - any excuse to buy new stuff, hehe
[22:50] <jcoxon> hehe
[23:00] <jcoxon> i'm liking this gpsstix more and more
[23:00] <jcoxon> it brings out the BTUART
[23:00] <jcoxon> which has more pins
[23:00] <jcoxon> and also VCC so i can easily wire up the phone cable
[23:00] <jcoxon> unlike my dodgy hacks last time
[23:02] <robhouse> cool
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[23:09] <macfreak4> hey
[23:09] <jcoxon> hey macfreak4
[23:09] <jcoxon> gosh #highaltitude has been busy today
[23:09] <jcoxon> hows the project going?
[23:09] <macfreak4> its coming along...
[23:10] <robhouse> hi
[23:10] <macfreak4> i'm assembling the payload
[23:10] <jcoxon> cool
[23:10] <jcoxon> excellent
[23:10] <macfreak4> i *could* upload some pics ;)
[23:10] <malgar> jcoxon, it's because they are all exicted about my hyper complex project of tomorrow
[23:10] <jcoxon> heh
[23:10] <jcoxon> e
[23:10] <robhouse> lol
[23:10] <jcoxon> well malgar i'll put your launch on the UKHAS website
[23:11] <jcoxon> macfreak4, go for it!
[23:11] <malgar> what is the ukhas website?
[23:11] <jcoxon> malgar, do sign up for UKHAS if you want
[23:11] <jcoxon> its the UK High Altitude Society
[23:11] <jcoxon> but
[23:11] <jcoxon> its open to anyone
[23:11] <macfreak4> i'm going to try to get a technician ham license and go the ham route
[23:11] <jcoxon> just with a focus on the UK
[23:11] <malgar> url?
[23:11] <robhouse> http://www.ukhas.org.uk
[23:11] <jcoxon> macfreak4, yeah if you can do ham its best
[23:11] <malgar> wow! is this new?
[23:12] Action: jcoxon wishes that HAM route was allowed in the UK
[23:12] <macfreak4> wha?
[23:12] <macfreak4> i didnt know that
[23:12] <jcoxon> yeah phatmonkey and i set it up
[23:12] <jcoxon> yeah
[23:12] <jcoxon> not allowed
[23:12] <jcoxon> thats why we use mobiles
[23:12] <robhouse> :(
[23:12] <macfreak4> they're not part of the treaty?
[23:12] <jcoxon> oh HAMs are allowed
[23:12] <jcoxon> but not as unattended stations
[23:12] <macfreak4> but not data transmissions or something?
[23:12] <macfreak4> ah
[23:12] <jcoxon> such as a balloon
[23:13] <macfreak4> that's discouraging :(
[23:13] <jcoxon> we are trying to change the law
[23:13] <macfreak4> well for data transmitting I'm using RTTY at ~45 baud and still images using SSTV
[23:13] <jcoxon> in the US ham is fine for balloons
[23:13] <jcoxon> cool
[23:13] <macfreak4> yea
[23:14] <macfreak4> I just want to see what's going on as it happens -- for added 'coolness' :P
[23:14] <jcoxon> well also all is not lost if you get some data
[23:14] <jcoxon> with pegasus we have communciation blackout for the flight
[23:14] <macfreak4> this is true
[23:14] <jcoxon> so like Pegasus II if it fails you lose everything
[23:15] <macfreak4> :(
[23:15] <macfreak4> how about Australia?
[23:15] <macfreak4> do they allow unattended stations?
[23:15] <jcoxon> no sure
[23:15] <jcoxon> probably
[23:15] <jcoxon> we have archaic laws
[23:15] <macfreak4> lol
[23:15] <robhouse> right, i'm gonna have to call it a night. I've got a meeting with the rest of Europe at 9am :(
[23:16] <jcoxon> night robhouse
[23:16] <macfreak4> cya
[23:16] <jcoxon> good to speak to you
[23:16] <robhouse> night
[23:16] <robhouse> you too
[23:16] <robhouse> cya
[23:16] robhouse (n=rob@cpc2-port4-6-1-cust34.cos2.cable.ntl.com) left irc:
[23:17] <macfreak4> I'm trying to figure out what size balloon I should get...
[23:17] <jcoxon> what the payload weight?
[23:17] <macfreak4> hmmm...
[23:17] <jcoxon> (oh and if you want to sign up to UKHAS you are very welcome to)
[23:18] <macfreak4> oh whats the url? i didnt catch it the 1st time
[23:18] <jcoxon> http://ukhas.org.uk
[23:18] <jcoxon> its mainly uk based but we should really spread out
[23:18] <macfreak4> kk will do ;)
[23:18] <macfreak4> the weight will b approximately 2.7kg
[23:18] <macfreak4> (thats 6lbs converted to metric)
[23:19] <jcoxon> well i used a 200gm for a payload of 1kg
[23:19] <macfreak4> ooh o.O
[23:19] <jcoxon> so 500gm might just do
[23:19] <jcoxon> if not 1000
[23:19] <macfreak4> hmm
[23:19] icez (n=icez@ip68-3-56-121.ph.ph.cox.net) joined #highaltitude.
[23:19] <macfreak4> well have you seen the "Balloon v1.0"?
[23:20] <jcoxon> yeah
[23:20] <macfreak4> he used a 1500gram for 8lbs
[23:20] <macfreak4> got to 80,000ft
[23:20] <jcoxon> yeah
[23:20] <jcoxon> thats about right
[23:20] <macfreak4> man im horrible w/ metric -- i should be better, after living in Aus
[23:21] <macfreak4> there seems 2 b a lack of balloons on ebay currently
[23:21] <jcoxon> hehe i keep buying them
[23:21] <jcoxon> there is a guy in the UK selling 500gm
[23:21] <macfreak4> lol
[23:21] <macfreak4> k
[23:22] <macfreak4> yea i saw that 1
[23:22] <jcoxon> aww burnt myself
[23:22] <macfreak4> o wait 800 gram in Canada
[23:22] <jcoxon> on my soldering iron
[23:22] <macfreak4> oww
[23:22] <jcoxon> perfect]
[23:22] <macfreak4> happens often...
[23:22] <macfreak4> theres a friggin reserve >:o
[23:23] <macfreak4> and someone's already bidding on it
[23:23] <jcoxon> hmmm
[23:23] <jcoxon> rubbish
[23:23] <macfreak4> "one has just been used on the Pegasus High Altitude Project it reached 20,000mtrs altitude and travelled over 63 miles !!"
[23:23] <macfreak4> thats what he said
[23:23] <jcoxon> yeah]
[23:23] <jcoxon> i told him
[23:23] <jcoxon> thought it would be nice
[23:24] <macfreak4> oh i thought yours was of a different size
[23:24] <jcoxon> oh it was
[23:24] <jcoxon> perhaps he stole it from someone else
[23:24] <jcoxon> whats the link?
[23:24] <macfreak4> o lol
[23:24] <macfreak4> http://cgi.ebay.com/weather-brand-new-balloon-in-bag-with-original-box_W0QQitemZ6274344125QQcategoryZ414QQssPageNameZWDVWQQrdZ1QQcmdZViewItem
[23:25] <macfreak4> yeah he quoted someone else
[23:25] <jcoxon> yeah he stole it from the guy in the UK who supplies 200gm
[23:25] <macfreak4> its obvious, because he uses non-Canadian terms
[23:25] <macfreak4> (pounds, 'mates', etc)
[23:25] <macfreak4> :P
[23:26] <jcoxon> hehe good point
[23:27] <macfreak4> what's the danger of getting a larger balloon and not filling it up all the way?
[23:27] <macfreak4> wont you get a higher altitude?
[23:27] <jcoxon> no no
[23:27] <jcoxon> it'll go higher
[23:27] <jcoxon> as the balloon will have futher to stretch
[23:27] <jcoxon> therefore higher burst altitude
[23:27] <macfreak4> so it would be better to get a larger one if higher altitude is preferable?
[23:28] <jcoxon> yup
[23:28] <jcoxon> so for Pegasus II
[23:28] <jcoxon> the payload was 2kg
[23:28] <jcoxon> but i used 1200gm
[23:28] <jcoxon> to get altitude
[23:28] <jcoxon> (probably was the reason for failing)
[23:28] <macfreak4> but farther drift distance
[23:28] <macfreak4> gotcha
[23:28] <jcoxon> yup
[23:29] <jcoxon> its all about weighing up the pros and cons
[23:29] <macfreak4> well not too much danger of oceans, im smack in the middle of North America
[23:29] <macfreak4> land-locked
[23:29] <jcoxon> perfect
[23:29] <jcoxon> then go for altitud
[23:29] <jcoxon> e
[23:29] <macfreak4> k, i plan to :D
[23:29] <jcoxon> http://cgi.ebay.com/weather-brand-new-balloon-in-bag-with-original-box_W0QQitemZ6274344125QQcategoryZ414QQssPageNameZWDVWQQrdZ1QQcmdZViewItem
[23:29] <jcoxon> oops wrong link
[23:29] <jcoxon> one sec
[23:30] <jcoxon> http://showcase.netins.net/web/wallio/ARHABrecords.htm
[23:30] <macfreak4> 118,352ft is the record of '05?
[23:30] <jcoxon> yup
[23:31] <jcoxon> i'm sure thats breakable
[23:31] <macfreak4> yea
[23:31] <macfreak4> brb
[23:34] <macfreak4> bak
[23:35] <jcoxon> am at the moment wiring up my gumstix to the mobile phone
[23:35] <macfreak4> o cool
[23:36] <malgar> well.. good night
[23:36] <jcoxon> night malgar
[23:36] <macfreak4> cya
[23:36] <jcoxon> good luck with the launch tomorrow
[23:36] <malgar> ciao
[23:36] <malgar> :)
[23:36] <malgar> heh
[23:36] <malgar> tnx
[23:36] <macfreak4> ive got a problem w/ this webcam -- the p2 laptop I'm using can't seem to record at any decent framerate...
[23:36] <macfreak4> very frustrating
[23:37] <jcoxon> processor not fast enough
[23:37] <macfreak4> maybe... but i've recorded full-framerate video on pentium II's before, this shouldn't be anything new
[23:37] <macfreak4> and its 400mhz for crying out loud grr
[23:38] <macfreak4> i am suspicious of the cf card
[23:40] malgar (n=malgar@adsl-ull-44-217.47-151.net24.it) left irc: "*** E' solo l'urto con un iceberg, che vuoi che sia, questa è una nave inaffondabile. *** 75$/barile"
[23:45] <macfreak4> i was wondering about a RAM disk
[23:46] <jcoxon> hmmmm
[23:46] <macfreak4> the system's got 192mb pc100 ram, which is probably heaps faster than the 1GB 40X CF card
[23:46] <macfreak4> then transfer the video from the ram to the CF after recording
[23:46] <jcoxon> oh a hell of a lot faster
[23:46] <jcoxon> possibly
[23:46] <jcoxon> not a big fan of CF systems
[23:47] <macfreak4> oh?
[23:47] <jcoxon> limited read write
[23:47] <jcoxon> etc
[23:47] <macfreak4> hmm well extremely low power and high storage to cost ratio
[23:48] <macfreak4> 40x = about 6MB/sec
[23:49] <jcoxon> true
[23:49] <jcoxon> right i'm off to bed
[23:50] <jcoxon> will chat soon
[23:50] <jcoxon> good luck with the webcam
[23:50] <jcoxon> cya
[23:50] jcoxon (n=jcoxon@jac208.caths.cam.ac.uk) left irc: "Leaving"
[00:00] --- Tue Apr 25 2006