highaltitude.log.20120612

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[02:12] <smrtz> Is anyone still awake?
[02:13] <Darkside> nope
[02:13] <Darkside> (australia )
[02:13] <Randomskk> well
[02:13] <Darkside> oh hi Randomskk
[02:14] <Randomskk> hiya
[02:15] <smrtz> I'm about to start soldering my flight computer together, but before I do, can someone check my circuit?
[02:15] <smrtz> http://imgur.com/aQfhl
[02:15] <smrtz> sorry it's not in eagle, but it confused me, and it's been a long day.
[02:18] <smrtz> today was my first day in the working world, I just worked a 9 to 6 shift, doing tech support...
[02:19] <Randomskk> looks believable. I don't know the pinout of the gps
[02:20] <smrtz> Randomskk, I'm pretty sure that parts right.
[02:21] <Randomskk> I think it should be safe to put together and try out :P
[02:21] <smrtz> the 4.7k resistor there is to make sure the arduino is getting input from the programmer, and not the GPS, during compiling/uploading.
[02:21] <smrtz> Thanks.
[02:21] <Randomskk> sleep time for me too now, though
[02:21] <Randomskk> good luck!
[02:22] <smrtz> heh, thanks.
[02:22] <smrtz> later
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[06:27] <eroomde> morning
[06:28] <Darkside> hey eroomde
[06:28] <jonsowman> morning
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[06:31] <eroomde> all well?
[06:32] <Darkside> i'm doing marking
[06:32] <Darkside> fun fun fun
[06:32] <Darkside> i've found my 'reference' report though
[06:32] <Darkside> the best report of the bunch, which i'll be comparing everything else to
[06:32] <nosebleedkt_> hello everybody
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[07:36] <fsphil> local sonde just landed, tracked it down to 216m
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[07:47] <UpuWork> close enough to go get it ?
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[07:48] <fsphil> about an hour away
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[07:49] <fsphil> at the speed I drive :)
[07:49] <fsphil> 54.437942 -6.172018
[07:49] <fsphil> in a field, easy to get
[07:49] <Darkside> go go go
[07:49] <UpuWork> go get it
[07:49] <UpuWork> screw work
[07:49] <Darkside> its an RS92SGPW?
[07:50] <fsphil> SGP of some kind
[07:50] <Darkside> cool
[07:50] <Darkside> prolly an RS92
[07:50] <UpuWork> you'll have to tell me how you track them sometime
[07:50] <Darkside> UpuWork: Sondemonitor
[07:50] <fsphil> sondemonitor
[07:51] <Darkside> its worth the money
[07:51] <fsphil> I'm trailing it, again
[07:51] <fsphil> (sssh)
[07:51] <Darkside> >_>
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[07:51] <fsphil> gonna write a little program to tail the log and upload to the tracker
[07:51] <Darkside> Bev is a good bloke
[07:51] <Darkside> heh cool
[07:51] <fsphil> I don't use it enough to buy it yet
[07:51] <Darkside> fsphil: theres also a COM/OLE output interface
[07:51] <Darkside> i did a hack to tie it into our tracking system
[07:52] <UpuWork> http://www.coaa.co.uk/sondemonitor.htm ?
[07:52] <Darkside> by making it produce telemetry sentences
[07:52] <Darkside> UpuWork: yes
[07:52] <UpuWork> ta
[07:52] <Darkside> i basically impersonated the fldigi ARQ server
[07:52] <Darkside> and produced valid sentences
[07:52] <Darkside> used that a few times to chase digisondes
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[07:55] <fsphil> I'm using the funcube dongle to receive them
[07:55] <fsphil> I've got a low pass filter to get rid of the broadcast FM noise, and just need something now to get rid of TETRA
[07:56] <UpuWork> Darkside super filter 2000 ?
[07:56] <fsphil> I think that might be too high frequency for these
[07:56] <fsphil> the sondes are at 402 mhz-ish
[07:56] <Darkside> yeah that SAW filter won't work
[07:56] <Darkside> we have a filter out of a vaisala receive station
[07:56] <Darkside> nice chunky cavity filter
[07:57] <Darkside> thats mounted unter the back seat of the landcruiser
[07:57] <fsphil> you raid the met office? :)
[07:57] <Darkside> fsphil: the mt gambier sonde site got upgraded
[07:57] <Darkside> we got all the old gear
[07:57] <fsphil> sweet
[07:58] <fsphil> from what I can tell the local site here got moved in the last few months
[07:58] <fsphil> it's on the shore of the lough now
[07:59] <fsphil> well near the shore
[07:59] <WillDuckworth> do they have more than 10mW to play with?
[08:01] <Darkside> yes
[08:01] <Darkside> the radiosondes do about 50mW
[08:02] <fsphil> what sort of data rate do you know?
[08:03] <Darkside> 1200 i think
[08:07] <fsphil> it does well
[08:08] <Darkside> yeah
[08:08] <Darkside> its FM modulated FSK iirc
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[08:40] <eroomde> a silly but preposterously-virtuosic arrangement of mozart's turkish march, just for fun: http://www.youtube.com/watch?v=0qG9PZNJI_k&feature=related
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[08:44] <Darkside> now thats just showing off
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[09:08] <schofieldau> and after the longest ever server downtime and general lathargy I'm back :P
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[09:11] <staylo> Hurrah, there was a delivery of free helium sometime this morning.. pity it's one of those disposable party balloon canisters that appears to have literally fallen off the back of a lorry
[09:16] <gonzo_> just wondering what use you can make from those disposable bottles, when empty?
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[09:20] <UpuWork> a small castle ?
[09:24] <gonzo_> could be a bit fcramped in there
[09:24] <gonzo_> I've made a few things from calorgas bottles over the years, so these little He bottles just look like they should be useable for something.
[09:24] <gonzo_> seems wrong to chuck them away
[09:26] <daveake> R2D2 replica
[09:26] <fsphil> diving bell for hampsters
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[09:27] <number10> mini ozpig? http://www.ozpig.co.uk/
[09:27] <UpuWork> hampster ?
[09:27] <gonzo_> repro oversized ARP helmet?
[09:27] <fsphil> only without the p
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[09:28] <gonzo_> you taking the P then?
[09:28] <fsphil> the hamster did, not me
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[09:28] <gonzo_> new sawdust needed
[09:30] <number10> someone mad a bbq out of larger ones - http://forum.downsizer.net/archive/reusing-gas-cylinders__o_t__t_51914.html
[09:31] <number10> +e
[09:31] <daveake> -e
[09:31] <number10> mind you looking at the pictures I think mad was correct
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[09:42] <gonzo_> yep, mad
[09:42] <gonzo_> www.g0nzo.co.uk/misc/DSCF2866.JPG
[09:42] <gonzo_> that's mine
[09:43] <gonzo_> did think of a small bbq for making bacon butties on HAB days. But those disposables are too thin to last long
[09:44] <zamabe> BACON
[09:44] <eroomde> gonzo_: that's rather nice
[09:44] <gonzo_> (I wonder how many chat clients on here have that word as a trigger/alert?)
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[09:44] <gonzo_> christened it a few weeks ago. Woerks excellently
[09:45] <fsphil> someone mention bacon?
[09:45] <eroomde> i have a lite disposable-sized but robust bbq
[09:45] <zamabe> bacon.
[09:45] <eroomde> made out of one of those stainless steel trays that canteen servery's use to keep food warm
[09:45] <gonzo_> there is now a mass dribbling outbreak in HAB land
[09:46] <gonzo_> Think metal is the key, hence the gas bottle
[09:46] <eroomde> with some holes drilled in the bottom and some thick chicken wire tack welded to lift it 1" off the holey base
[09:46] <gonzo_> thick
[09:46] <eroomde> really good for steaks actually as the charcoal is quite near the meat
[09:46] <eroomde> you get some awesome maillard action
[09:46] <eroomde> without wishing to descend into food nerdery
[09:47] <gonzo_> would we get our botties spanked for getting OT ?
[09:50] <eroomde> it's fine when i do it
[09:50] <eroomde> no one else is allowed though
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[09:51] <bambi> ~Good Evening~ every one
[09:51] <eroomde> Darkside: ^
[09:51] <UpuWork> morning bambi
[09:51] <eroomde> must be for you surely
[09:51] <UpuWork> Darkside meet bambi
[09:51] <eroomde> that sounds like disney has lost its way
[09:51] <UpuWork> lol
[09:52] <bambi> well met Darkside *smiles*
[09:52] <eroomde> a collaboration with disney and george lucus
[09:52] <UpuWork> locust ?
[09:52] <eroomde> lucas
[09:52] <bambi> hey its not bashing bambi day today :)
[09:52] <staylo> canadian national holiday?
[09:53] <bambi> I have a question... how do the tracking vehicles upload their position etc to thye spacenear.us website?
[09:53] <UpuWork> various apps
[09:54] <UpuWork> it can be done via dl-fldigi in the car if it has a GPS plugged into the laptop
[09:54] <eroomde> via radio hams who decode the telemetry radios
[09:54] <UpuWork> tracking vehicles eroomde
[09:54] <Darkside> wat
[09:54] <Darkside> bambi: what state
[09:54] <eroomde> ah yes
[09:54] <eroomde> like it says
[09:54] <UpuWork> http://ukhas.org.uk/general:chase_car_trackers
[09:54] <eroomde> .
[09:54] <bambi> oh dl-fldigi will go that too?
[09:54] <bambi> < looks
[09:54] <UpuWork> Android and Iphone apps
[09:55] <UpuWork> Queensland Darkside
[09:55] <Darkside> ahh
[09:55] <Darkside> right
[09:55] <bambi> hello Darkside
[09:55] <Darkside> you'll be wanting to go inland to launch
[09:55] <Darkside> bambi: hsve you contacted terry yet?
[09:55] <bambi> yes indeed from what I plan about 300km it seems
[09:56] <bambi> Darkside> I have but he seems a little busy
[09:56] <Darkside> yeah he is
[09:56] <Darkside> we all are
[09:56] <Darkside> had a lot of launches recently
[09:56] <bambi> yes I watched the 2 a week ago on spacenearus
[09:56] <bambi> and all the UK ones just past
[09:57] <bambi> UK winds are er intereesting - you dont have to travel far for recovery it seems
[09:57] <daveake> lol
[09:57] <daveake> Varies
[09:57] <Darkside> depends on the launch
[09:57] <Darkside> depends on so any things
[09:57] <Darkside> bambi: are you an amateur radio operator?
[09:57] <bambi> well all my prfedictions seem to say it will travel about 250km
[09:57] <bambi> Darkside> I am not :(
[09:57] <daveake> I had one land in Belgium; some have gone much much further
[09:58] <Darkside> bambi: ok
[09:58] <bambi> yikes Belgium
[09:58] <Darkside> well, the ISM band beacons are legal to use in australia
[09:58] <bambi> I have purchased a receiver (2000 year) vintage s
[09:58] <Darkside> eh?
[09:58] <Darkside> what receiver
[09:59] <bambi> Yaesu VR-500
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[09:59] <Darkside> ok
[09:59] <gonzo_> prob is in UK, we are so small, that nat tarveling far still puts you in the sea
[09:59] <Darkside> i don't know how sensitive that is
[09:59] <Darkside> but probably good enough
[09:59] <bambi> Darkside> I will find out I guess
[09:59] <gonzo_> frightening that 2000 is now vintage!
[10:00] <Darkside> 0.5uV, that should be ok
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[10:00] <gonzo_> can always put a preamp on
[10:00] <Darkside> might be worth getting hold of a yagi or something to use
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[10:00] <gonzo_> though can cause probs with other local strong sigs
[10:00] <Darkside> gonzo_: tbh no point
[10:00] <Darkside> we can usually receive ours without a preamp fine
[10:01] <gonzo_> antenna gain is the best option
[10:01] <Darkside> yep
[10:01] <bambi> Darkside> The manual says 370~520MHz SSB/CW 0.5uV (10dB S/N)
[10:01] <gonzo_> is 0.5uV for FM?
[10:01] <Darkside> yes thats what i saw too bambi
[10:01] <gonzo_> aha, ok
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[10:01] <bambi> I am considering making a 4 el yagi
[10:02] <Darkside> yeah that woudl heolp
[10:02] <Darkside> help*
[10:02] <Darkside> bambi: you can get the radio modules from RFMA
[10:02] <bambi> I will buy some 50 ohm cable Wednesday
[10:02] <Darkside> http://rfma.com.au/
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[10:02] <bambi> < looks..
[10:02] <Darkside> no online store there
[10:02] <Darkside> you'll have to ask for a quite
[10:02] <Darkside> quote
[10:03] <Darkside> i wouldn't go too far in all this before getting authorization from casa
[10:03] <gonzo_> good for DFing on reciovery
[10:03] <Darkside> yep
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[10:04] <bambi> Darkside> I received contact crom CASA and it seems the project would be classified as a 'light' balloon as under 4kg
[10:04] <Darkside> yes
[10:04] <Darkside> you still need to get a launch site authorized
[10:04] <Darkside> and get NOTAMs issued
[10:04] <bambi> Yes I read that too
[10:04] <bambi> thank you it will all be offical
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[10:05] <Darkside> good, just making sure
[10:05] <bambi> I notice from photos that the SA group (you?) have radar reflectors on your launches - is that a requirement or...?
[10:05] <Darkside> not really sure actually
[10:05] <Darkside> i'd check with casa
[10:05] <bambi> I will ask CASA
[10:06] <bambi> also I read that in the US they require a flight ending device (apart from the balloon burst) do you know if that is the case for Australia?
[10:06] <Darkside> not sure on teh regulations on that
[10:06] <bambi> I will ask CASA
[10:06] <Darkside> we do have one now
[10:07] <bambi> as you are radio enthousiasats I guess that is controlled by a radio signal?
[10:07] <Darkside> yes, we are amateur radio operators
[10:07] <Darkside> and use high power uplink radios
[10:08] <Darkside> you need a license to use more than 25mW on that band
[10:08] <bambi> such a device for my project might be handy if run of a timer or something other wise it may land in the Coral Sea if the flight goes too long
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[10:09] <bambi> yes I have already contacted the TAS store re transmitters - thanks anyway
[10:10] <bambi> ok another question if its OK... is theer a pressure sensor that will read the low values at height available? or is it not a necessaty?
[10:10] <Darkside> well we don't fly a pressure sensor normally
[10:10] <Darkside> most don't go low enough
[10:10] <bambi> OK thanks - yes I am finding that too
[10:10] <Darkside> we have flown a BMP085 in the past, that died at about 38km i think
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[10:12] <bambi> tomorrow I buy the Foamular insulation to build the capsule
[10:15] <bambi> anyway thanks for chatting - its dinner time - see you all next time
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[10:27] <griffonbot> Received email: David Bowkis "Re: [UKHAS] Brightwalton Launches 9th or 10th June"
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[11:30] <griffonbot> @cuspaceflight: Pop team at launch site, 15 mins until filling. #cusf [http://twitter.com/cuspaceflight/status/212507148180144129]
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[11:50] <Elwell> UpuWork: looks like you have a customer - "There is an interesting glitch at 18,270.6m. The system stops updating the GPS coordinates and we have a flat-top." followed by "Ok guys... Mark 5 will be done with an arduino, a compact camera and this guy:
[11:50] <Elwell> http://ava.upuaut.net/store/index.php?route=product/product&path=59_60&product_id=68
[11:51] <UpuWork> cool where was that ?
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[12:04] Nick change: UpuWork -> M0UPU
[12:07] Nick change: number10 -> M0MDB
[12:07] <M0UPU> :)
[12:07] <M0MDB> get on with some work M0UPU ;)
[12:07] <M0UPU> tbh
[12:07] <M0UPU> its dead quiet here today
[12:08] <M0MDB> here as well. I wonder if anyone will ask what the long pipe is sticking out of the office window
[12:08] <M0MDB> not the best antanna in the world but should work
[12:08] <M0MDB> -a +e
[12:12] <The-Compiler> when will POP1 be launched? Class is boring :P
[12:12] <fsphil> boo, it's busy here :p
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[12:15] <jdtanner1> Are we due a launch today?
[12:15] Nick change: junderwood -> M0JCU
[12:15] <M0MDB> yes
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[12:15] <Laurenceb> great
[12:16] <Laurenceb> now ill get even lkess work done
[12:17] <M0UPU> you can't divide by zero anyway Laurenceb so don't worry about it :)
[12:17] <jdtanner1> lol
[12:17] <SamSilver> is there streaming video from POP?
[12:17] <jdtanner1> What time is it due up? I'm off out in a bit but I can setup my radio beforehand if needed.
[12:18] <M0UPU> about 11 O'Clock this morning
[12:18] <griffonbot> @cuspaceflight: 10 mins away from launch #cusf [http://twitter.com/cuspaceflight/status/212519220259467264]
[12:18] <M0UPU> ----/\
[12:18] <jdtanner1> Ah... lol ... :)
[12:18] <Daviey> location?
[12:19] <Daviey> Cambridge ?
[12:19] <The-Compiler> yep
[12:19] <jdtanner1> Cambridge...Probably a bit of a stretch for my equipment tbh...but you never know ;)
[12:19] <The-Compiler> http://spacenear.us/tracker/
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[12:25] Nick change: eroomde -> The-Pre-Processo
[12:25] Nick change: The-Pre-Processo -> The-PreProcessor
[12:26] <The-Compiler> The-PreProcessor: hi.
[12:26] <M0UPU> what happens if you 2 have babies ?
[12:27] <griffonbot> Received email: David Akerman "Re: [UKHAS] Brightwalton Launches 9th or 10th June"
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[12:28] <The-Compiler> M0UPU: I presume he is male, so that's gonna be hard.
[12:30] <fsphil> they don't have babies, they have objects
[12:30] <Laurenceb> I presume he is male, so that's gonna be hard.
[12:30] <fsphil> and are compilers not all female? they complain enough
[12:30] <Laurenceb> that sounds so wrong
[12:31] <The-Compiler> Laurenceb: language-wise?
[12:34] <The-Compiler> hmm, seems launched
[12:34] Nick change: jdtanner1 -> jdtanner
[12:38] <griffonbot> @cuspaceflight: Launch #cusf [http://twitter.com/cuspaceflight/status/212524186634174466]
[12:41] <M0UPU> whats the dial M0JCU
[12:41] <M0UPU> ?
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[12:41] <M0JCU> 434649751
[12:41] <M0JCU> (ish)
[12:41] <M0MDB> 434.0744 for astra
[12:41] <M0UPU> lol
[12:42] <M0UPU> can't see it yet
[12:42] <M0JCU> 300baud
[12:42] <M0JCU> (mainly_
[12:42] <M0JCU> It's a bit worrying that POP is ascending 2m/s faster than ASTRA
[12:44] <M0UPU> I see POP weakly
[12:44] <The-Compiler> M0MDB: My classmate likes your callsign :P
[12:45] <M0MDB> why?
[12:45] <M0UPU> is POP1 50 baud ?
[12:45] <M0UPU> or are they both 300 ?
[12:45] <The-Compiler> I find the predicted landing point worrying :P
[12:45] <The-Compiler> M0MDB: because it sounds like mom-database
[12:46] <M0MDB> ic - not that I know what one of those is :)
[12:46] <M0UPU> both payloads 300 baud ?
[12:46] <M0MDB> astra
[12:46] <M0MDB> is dual 300/50 M0UPU
[12:46] <M0UPU> whats POP ?
[12:46] <M0JCU> POP1 alternates between 300 and 50
[12:46] <M0UPU> grrr
[12:47] <M0JCU> S5 here
[12:50] <M0UPU> one day...
[12:50] <M0UPU> does seem a strong signal
[12:51] <M0JCU> Still using the Yagi which I put up to listen to the lingering death of Buzz
[12:51] <M0MDB> it was also put to good use tracking ANU-3 M0JCU - thanks
[12:52] <M0JCU> That was just the discone I usually use. You're welcome, though.
[12:52] <M0JCU> Pleas track my next flights :)
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[12:53] <M0UPU> As long as the weather holds off I'm putting a Yagi up on Thursday
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[12:53] <M0MDB> will do. what is the project name M0JCU ?
[12:54] <M0JCU> Helios & Vortex
[12:54] <M0JCU> The next flight will have 3 transmitters on 2 payloads.
[12:54] <M0JCU> The first payload with two transmitters will descend separately
[12:55] <M0MDB> that will kepp us busy
[12:57] <fsphil> ah, launch
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[13:09] <benoxley> afternoon
[13:11] <M0MDB> hi
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[13:14] <gonzo_> astra/pop is a single balloon?
[13:17] <griffonbot> Received email: Oliver De Peyer "[UKHAS] Airborne AM valve transmitter?"
[13:18] <M0UPU> yes
[13:18] <kokey> looks like it
[13:18] <M0UPU> hi Ben
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[13:19] <M0UPU> someone want to explain the gag to Oliver ? :)
[13:21] <M0MDB> mmm, I knew that would happen as I wrote it
[13:23] <griffonbot> Received email: Oliver De Peyer "Re: [UKHAS] Brightwalton Launches 9th or 10th June"
[13:24] <daveake> LOL
[13:25] <fsphil> xD
[13:25] Action: daveake tries to think of a polite/unoffensive/non-piss-taking reply
[13:25] Action: daveake fails
[13:25] <fsphil> you couldn't
[13:25] <fsphil> it's not possible
[13:25] <M0MDB> oh, thats not good daveake - I have no idea either
[13:26] <M0UPU> jsut reply with farts r funnea lollol
[13:26] <M0MDB> maybe I will do auto reply out of orifice
[13:26] <M0MDB> opps you know my spellings bad
[13:27] <Laurenceb> Oliver de Peyer PhD
[13:27] <fsphil> the wind in the pillows
[13:27] <Laurenceb> PhD?!
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[13:29] <M0MDB> sorry I have got to stop tracking for a while
[13:29] <M0UPU> should be ok Dave
[13:30] <M0MDB> ok
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[13:38] <griffonbot> Received email: John Graham-Cumming "Re: [UKHAS] Airborne AM valve transmitter?"
[13:41] <M0JCU> Hmm. So the backup transmitter on Astra is bust?
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[13:43] <M0UPU> not sure is anyone on it ?
[13:45] <gonzo_> poss only half the balloon has burst?
[13:46] <griffonbot> Received email: David Akerman "Re: [UKHAS] Brightwalton Launches 9th or 10th June"
[13:47] <daveake> resistance was futile
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[13:48] <benoxley> seems to be completely bust....
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[13:49] <daveake> pop
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[13:53] <benoxley> wtf
[13:55] <The-PreProcessor> it's living up to its name
[13:57] <M0UPU> "wtf" - burst too early ?
[13:59] <M0UPU> odd the prediction has changed rather dramatically
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[14:00] <benoxley> way too early
[14:01] <benoxley> that was a 1600g howyee
[14:01] <daveake> wow, worse result than mine
[14:01] <griffonbot> Received email: Oliver de Peyer "Re: [UKHAS] Brightwalton Launches 9th or 10th June"
[14:01] <M0UPU> Akerman ....
[14:02] <daveake> can't tell if serious ....
[14:02] <M0UPU> I know
[14:02] <griffonbot> Received email: Oliver de Peyer "Re: [UKHAS] Airborne AM valve transmitter?"
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[14:04] <griffonbot> Received email: Ed Moore "Re: [UKHAS] Brightwalton Launches 9th or 10th June"
[14:07] <M0UPU> 22km from a 1600g Hwoyee
[14:08] <M0UPU> wierd
[14:08] <The-PreProcessor> poor old oliver de payloader
[14:08] <M0UPU> Astrobiologist PhD
[14:08] <gonzo_> valve am on 27meg is doable though...... (Waits for boot to ricocket of nut)
[14:09] <M0UPU> I'm sure he'd launch a washing machine complete with concrete block if he could
[14:09] <griffonbot> Received email: David Akerman "Re: [UKHAS] Brightwalton Launches 9th or 10th June"
[14:10] <M0UPU> lol
[14:10] <daveake> I'm ooot
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[14:10] <WillDuckworth> lol
[14:10] <gonzo_> only a sterile one
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[14:11] <WillDuckworth> well done dave
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[14:14] <fsphil> going down already?
[14:15] <M0UPU> for a while now
[14:15] <M0UPU> burst early
[14:15] <M0UPU> very early
[14:15] <fsphil> eek
[14:15] <benoxley> bad ablloon, very bad balloon
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[14:17] <benoxley> can anyone give me a predicted landing postcode please?
[14:18] <kokey> SW1A 2AA
[14:18] <kokey> (joking)
[14:19] <benoxley> seriously, cant load the tracker too well in the car
[14:20] <WillDuckworth> something near CB80DX
[14:20] <gonzo_> CB8 0PH
[14:21] <kokey> that's a good point, should have a feed for post codes of predicted landing location
[14:22] <WillDuckworth> CB8 0PH
[14:23] <M0UPU> gone for me
[14:25] <The-PreProcessor> yeah the tracker is definitely not a mobile friendly website
[14:25] <griffonbot> Received email: Oliver de Peyer "Re: [UKHAS] Brightwalton Launches 9th or 10th June"
[14:25] Last message repeated 1 time(s).
[14:25] <M0UPU> Safari explodes on iThings when you point it at the tracker
[14:26] Nick change: M0UPU -> UpuWork
[14:26] <The-PreProcessor> UpuWork: yes
[14:26] <The-PreProcessor> crashes mine while trying to load all the points
[14:26] <UpuWork> yup
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[14:29] Nick change: M0JCU -> junderwood
[14:35] <gonzo_> is m6two in a chace car?
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[14:41] <craag_work> I believe it's benoxle_
[14:41] <craag_work> so yes
[14:43] <number10> mmm wonder what happened there
[14:47] <UpuWork> swinging from a power line ?
[14:47] <UpuWork> landed on an angry cow which is running up and down the field as we speak
[14:48] <gonzo_> thought someone was trying to start their ballpoint pen on the map
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[14:53] <number10> just had to drive mrs10 home -journey home went very near to landing point
[14:58] <The-PreProcessor> the sat view of the landing field is pretty cool
[14:58] <The-PreProcessor> i wonder what used to be there
[14:59] <The-PreProcessor> you can never be sure if those markings at 50 years old or 2000
[14:59] <Laurenceb> does the pre processor remove water from the air prior to cooling?
[15:00] <Laurenceb> /troll
[15:01] <The-PreProcessor> no
[15:01] <The-PreProcessor> i remove # signs and replace them with other shit
[15:01] <The-PreProcessor> usually lots of it
[15:02] <Laurenceb> heh
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[15:03] <Laurenceb> of course the trick is the water isnt removed until after the cooling, thats the reason for the dyson style device
[15:03] <Laurenceb> ok ill shut up now
[15:04] <Laurenceb> James Dyson caught me raiding his kit out of a skip once, he was surprisingly cool about it :P
[15:04] <jdtanner> Afternoon. Is there a better way to use the tracker on an IPhone other than visiting the spacenear.us site?
[15:05] <Laurenceb> - id snuck around the back of a trade show where stuff was being chucked away
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[15:05] <UpuWork> not currently jdtanner
[15:05] <jdtanner> Cheers UpuWork
[15:05] <jdtanner> I'm finding mobile Safari is crashing
[15:06] <UpuWork> it does when it gets alot of points on there
[15:06] <SpeedEvil> Laurenceb: :)
[15:06] <SpeedEvil> Laurenceb: Get anything?
[15:06] <jdtanner> Hmm, perhaps there is room for a dedicated app? #cunningplan ;)
[15:07] <Laurenceb> lots of pneumatics
[15:07] <SpeedEvil> :)
[15:07] <fsphil> ihabhound :)
[15:08] <Laurenceb> he said they werent going to bother reusing it anyway, and his girlfriend was bored
[15:08] <Laurenceb> so he had to get back to the hotel asap :P
[15:08] <SpeedEvil> Heh. :)
[15:09] <WillDuckworth> how is habhound doing these days fsphil?
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[15:09] <gonzo_> most of the dyson kit I've seen is so plastic, it's only one crack away fromn the skip anyway
[15:11] <fsphil> WillDuckworth: stable but needs some UI work
[15:11] <fsphil> or indeed a UI
[15:12] <WillDuckworth> cool - will have to have an investigate
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[15:12] Nick change: jdtanner_ -> jdtanner
[15:12] <fsphil> I need to try a win32 build again
[15:14] <The-PreProcessor> all switching regs seem to have shit efficiency for low vouts like 3.3V
[15:14] <The-PreProcessor> i guess it must be a diode drop having a bigger effect or something
[15:14] <Laurenceb> not true
[15:14] <Laurenceb> you need one with all FET switching
[15:14] <Laurenceb> check linear tech
[15:14] <The-PreProcessor> but it seems impossible to get much above 80% with say vin = 12, vout = 3.3 and lowish current (100mA)
[15:15] <The-PreProcessor> yeah i know about all fet and it still doesn;t seem to help much
[15:15] <Laurenceb> 80% is goodish
[15:15] <The-PreProcessor> i want 90+ if poss
[15:15] <Laurenceb> hmm
[15:15] <Laurenceb> i think there is a linear tech one that almost gets that
[15:15] <The-PreProcessor> it's quite a big deal for this app, might buy an extra day of life
[15:15] <Laurenceb> i linked it a few days ago
[15:16] <The-PreProcessor> do you have it to hand?
[15:16] <Laurenceb> no
[15:16] <Laurenceb> oh
[15:16] <Laurenceb> i didnt see 12v in
[15:16] <Laurenceb> ok, i use ltc3467a for something similar
[15:16] <Laurenceb> and get about 87%
[15:17] Action: Laurenceb read it as 1.2v in
[15:18] <Laurenceb> ltc3467a sepic
[15:18] <The-PreProcessor> sure that's the right part number?
[15:18] <The-PreProcessor> doesn;t reyurn anything on the linear website
[15:19] <Laurenceb> hmm
[15:19] <Laurenceb> http://www.linear.com/product/LT3467A
[15:20] <The-PreProcessor> yup got there
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[15:20] <The-PreProcessor> you had a stray c
[15:20] <The-PreProcessor> a
[15:20] <The-PreProcessor> ta
[15:20] <SpeedEvil> 90% is easy for buck with sync rect
[15:20] <The-PreProcessor> ah but that's a boost
[15:21] <Laurenceb> they lie
[15:21] <Laurenceb> you need to play in spice :P
[15:21] <The-PreProcessor> SpeedEvil: show me
[15:21] <The-PreProcessor> specs are
[15:21] <The-PreProcessor> 3.3V out, about 50-100mA current draw, 12V in
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[15:21] Nick change: jdtanner_ -> jdtanner
[15:21] <Laurenceb> check my github
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[15:21] <The-PreProcessor> ride forth and bring me back the part i need
[15:21] <Laurenceb> the dactyl project - its under in the schematics
[15:22] <Laurenceb> *used
[15:23] <Laurenceb> but its just sepic really
[15:23] <SpeedEvil> Go to national.com - on the right-hand-side of the page is 'power architect' - enter 12v in, 3.3V out. (you need to register)
[15:23] <The-PreProcessor> a) you don't need to reister
[15:23] <The-PreProcessor> b) already done it
[15:24] <SpeedEvil> Gives a TPS54061 based converter - 1000m^2, $3
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[15:30] <SpeedEvil> You need quite large inductors for high efficiency. Do you care about weight?
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[15:32] <Laurenceb> mouser stock some nice inductors
[15:32] <Laurenceb> TDK stuff
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[15:35] <SpeedEvil> 'only' 100mA is a bit problematic - as you tend to run into fixed losses
[15:35] <SpeedEvil> hmm
[15:35] <fsphil> aaah simple pleasures. pressing eject on 16 dvd drives in one go
[15:35] <SpeedEvil> I wonder if the national website is not bogosity.
[15:35] <SpeedEvil> As I'm now wondering if it does not properly model discontinous mode in inverters
[15:36] <SpeedEvil> Because it's optimising heavily for 50kHz designs
[15:36] <SpeedEvil> err
[15:36] <SpeedEvil> not discontinuous in terms of inductor currents.
[15:36] <SpeedEvil> I mean discontinuous in terms of bursts of operating
[15:37] <natrium42> tracking on the new macbook pro will be awesome
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[15:37] <natrium42> 2880x1800 res
[15:38] <The-PreProcessor> SpeedEvil: yes exactly
[15:38] <The-PreProcessor> i'm glad we're on the same page now
[15:38] <The-PreProcessor> re: 100mA being the problematic bit
[15:38] <The-PreProcessor> i wasn't making it up for fine saying that they weren't efficient for my scenario
[15:38] <The-PreProcessor> for fun*
[15:39] <SpeedEvil> Ok - let's do this another way.
[15:39] <The-Compiler> we're missing someone called The-Linker here :P
[15:39] <The-Compiler> also, hi natrium42
[15:40] <The-PreProcessor> and the assembler
[15:40] <SpeedEvil> Right - we need half an amp at least switch current.
[15:40] <The-PreProcessor> and given people's uController prferences on this channel, maybe also The-Dude
[15:41] <SpeedEvil> And sync rect, and supply max of 15v
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[15:43] Nick change: priyesh_ -> priyesh
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[15:47] <Laurenceb> anyone know a dxf editor for ubuntu?
[15:47] <russss> qcad
[15:47] <russss> or draftsight
[15:49] <Laurenceb> thanks
[15:56] <Laurenceb> qcad looks nice... if i can work out how to move something
[15:59] <craag_work> Any word on recovery today?
[16:01] <SamSilver> craag my runny nose is much better thanx and i should be able to smell by the weekend
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[16:02] <craag_work> ?
[16:06] <SamSilver> the flu meds are making me think i am recovering and am funny
[16:06] <SamSilver> last i heard was that benoxly was on his way to uplift the payload
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[16:12] <fsphil> *woosh* :)
[16:12] <fsphil> there's been a lot of wooshing today
[16:15] <The-PreProcessor> and popping
[16:15] <The-PreProcessor> why would you call a payload POP?
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[16:15] <The-PreProcessor> that's like calling a boat SINK
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[16:21] <fsphil> it certainly lived up to its name
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[16:37] Action: Laurenceb is starting work on soldering his SDr-gps dongle
[16:37] <Laurenceb> *SDR-GPS
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[16:37] <Laurenceb> should have some results in a couple of days hopefully
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[16:51] <Upu> ping cuddykid
[16:51] <cuddykid> Upu: hiya
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[17:04] <The-PreProcessor> preprocessor tip for the day, will saves you hours of grief
[17:06] <The-PreProcessor> when doing the pcb schemeatic in eagle, with your farnell window open, add the farnell part number as an attribute to the part (right click, attribute). saves you having to hunt down that specific cap with specific footprint with specific ESR that you found 2 weeks ago but can't find now when it comes to making the order
[17:06] <The-PreProcessor> you'll thank yourself later
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[17:50] <griffonbot> @b3noxley: "@PhysocOutreach: Success!! http://t.co/lepvEv1M" #UKHAS [http://twitter.com/b3noxley/status/212602678520451072]
[17:51] <griffonbot> @jonsowman: RT @b3noxley: "@PhysocOutreach: Success!! http://t.co/lepvEv1M" #UKHAS [http://twitter.com/jonsowman/status/212602946427437057]
[17:52] <The-PreProcessor> Upu: have you ever played with the SL1300 antennas? the ones that you can integrate into cases and run near pcb
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[18:04] <Upu> nope Eroomde not used those
[18:04] <jonsowman> evening all
[18:04] <Upu> evening
[18:04] #highaltitude: mode change '+o jonsowman' by ChanServ!ChanServ@services.
[18:04] 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
[18:04] <Upu> well you can run a payload from a single AAA
[18:04] #highaltitude: mode change '-o jonsowman' by ChanServ!ChanServ@services.
[18:05] <Upu> note AVA the temperature is actually the battery voltage
[18:06] <Upu> in mV
[18:06] <number10> did you go on recovery of pop/astra jonsowman
[18:06] <Upu> its actually about 1.17v needs calibrating
[18:07] <jonsowman> number10: yep
[18:07] <number10> was it easy... looking at the track - Upu sugested it was being dragged up the field by a cow :)
[18:07] <Upu> :)
[18:07] <Upu> angry cow :)
[18:08] <number10> oh yea forgot that
[18:08] <jonsowman> it was quite difficult to get to but fine once we reached the field
[18:08] <The-PreProcessor> 18:04 < Upu> nope Eroomde not used those
[18:08] Last message repeated 5 time(s).
[18:08] <jonsowman> The-PreProcessor: ?
[18:08] <The-PreProcessor> 18:04 < Upu> nope Eroomde not used those
[18:08] Last message repeated 2 time(s).
[18:08] <Upu> hello ?
[18:08] <The-PreProcessor> 18:04 < Upu> nope Eroomde not used those
[18:08] Last message repeated 1 time(s).
[18:08] #highaltitude: mode change '+o jonsowman' by ChanServ!ChanServ@services.
[18:08] <Upu> Its Ed
[18:08] <The-PreProcessor> woah
[18:08] <The-PreProcessor> sorry
[18:09] <The-PreProcessor> middle button failed
[18:09] <Upu> lol
[18:09] <Upu> back down jonsowman
[18:09] <jonsowman> this is why you should change that assignment in putty :P
[18:09] <Upu> :)
[18:09] <number10> processor failure
[18:09] #highaltitude: mode change '-o jonsowman' by ChanServ!ChanServ@services.
[18:09] <The-PreProcessor> putty?
[18:09] <jonsowman> different client?
[18:09] <The-PreProcessor> just terminal
[18:09] <jonsowman> i thought middle-button-paste was a PuTTY thing
[18:09] <The-PreProcessor> 18:04 < Upu> nope Eroomde not used those
[18:09] <jonsowman> never mind
[18:09] <The-PreProcessor> wowza
[18:09] <jonsowman> anyway number10 it was easy enough really
[18:09] Nick change: The-PreProcessor -> eroomde
[18:10] <jonsowman> had to DF with the yagi a bit
[18:10] <eroomde> sorry about the flood
[18:10] <jonsowman> massive blue chute helped a lot
[18:10] <number10> great, was it far off the last telemetry location jonsowman
[18:11] <jonsowman> number10: we actually kept it all the way to the ground in the car
[18:11] <jonsowman> we happened to be at the top of a hill with a clear view south as it landed
[18:11] <number10> thats good
[18:11] <jonsowman> disappointed with the balloon
[18:11] <number10> I drove not far off the landing site on way home - but left early
[18:12] <jonsowman> 1600g hwoyee filled for 5m/s, predicted 35km
[18:12] <jonsowman> burst at 23km
[18:12] <jonsowman> must have been one of the bad batch I guess
[18:12] <number10> thats three 1600s this weekend that have failed ealy
[18:12] <jonsowman> hmm
[18:12] <jonsowman> it failed in a really weird way as well
[18:12] <number10> but three a few weekends before got recors
[18:12] <number10> +d
[18:12] <jonsowman> yeah
[18:13] <jonsowman> very odd
[18:13] <number10> steve was assured they were from same batch
[18:13] <jonsowman> yeah
[18:13] <jonsowman> never mind
[18:13] <nick_> (middle button paste is a general linux thing - it screws me over when I use windows machines)
[18:13] <eroomde> we gots a whole loada ozone
[18:14] <jonsowman> the pictures were still good so the physoc group were happy
[18:14] <jonsowman> threw us off on the chase though :)
[18:14] <eroomde> oh yes i missed that/ middle button paste is systemwide linux
[18:15] <nick_> Will we hear anything about the things the kids launched?
[18:15] <jonsowman> nick_: no idea, i should think so
[18:15] <jonsowman> i guess that's up to the school really
[18:15] <jonsowman> their stuff is just being posted back to them
[18:15] <jonsowman> hopefully they publicise it a bit
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[18:16] <nick_> Is there a list somewhere of the various things they launched?
[18:16] <jonsowman> not that i know of
[18:17] <jonsowman> i was only involved in the launching, you'll have to speak to one of the soton group when they're back
[18:17] <jonsowman> they're still on the M25 at the moment according to latitude
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[19:08] Nick change: number10_ -> number10
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[19:13] <thecduck> hi guys!
[19:13] <jonsowman> good evening
[19:14] <thecduck> what's up?
[19:15] <jonsowman> not a lot, another launch, chase and recovery done
[19:15] <thecduck> neat
[19:15] <jonsowman> yourself?
[19:15] <thecduck> is it on spacenear.us?
[19:15] <jonsowman> yep
[19:16] <thecduck> POP1?
[19:16] <jonsowman> yep
[19:17] <thecduck> sweet
[19:18] <Laurenceb__> http://www.3mselect.co.uk/p-2415-3m-pocketprojector-mp160.aspx
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[19:19] <fsphil> still quite expensive
[19:19] <thecduck> i'm doing some research for our first launch. we've got a 800 gram payload. how big a balloon do we need for proper uplift? we're aiming for the 30-40.000km mark
[19:20] <jonsowman> 1kg totex will get you to about 31km
[19:20] <jonsowman> at 5m/s
[19:21] <jonsowman> 800g totex will get you 31.7km at 4.3m/s
[19:21] <jonsowman> play around with this: http://www.cusf.co.uk/calc/
[19:23] <thecduck> ah, great. thanks!
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[19:26] Nick change: Laurenceb__ -> Laurenceb_
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[19:50] Nick change: danielsaul -> M6DSA
[19:51] <thecduck> where do you guys purchase balloons?
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[19:58] Nick change: M6DSA -> danielsaul
[19:59] Nick change: danielsaul -> M6DSA
[20:01] <fsphil> you're very efficient today jonsowman
[20:02] <jonsowman> haha
[20:02] <jonsowman> i'm part speccing and it's boring
[20:03] <jonsowman> parts for a new joey :)
[20:04] <fsphil> have you built the first one yet?
[20:04] <jonsowman> yeah the first one flew on Nova 21
[20:04] <jonsowman> and then again on Martlet 1
[20:04] <jonsowman> and is now lost in scotland :(
[20:04] <fsphil> aah
[20:05] <jonsowman> never mind
[20:05] <jonsowman> new one with new xtal anyway
[20:06] <fsphil> there are worse places for it go get lost in
[20:06] <fsphil> and you get many points for the method it used to get lost
[20:07] <jonsowman> haha
[20:07] <jonsowman> true
[20:07] <number10> amy launches planned jonsowman
[20:07] <number10> n
[20:07] <jonsowman> number10: this new joey once i've built it :)
[20:08] <jonsowman> number10: http://www.cusf.co.uk/2012/03/joey-m-hardware-complete/
[20:09] <number10> that looks nice - just reading
[20:11] <number10> hope I am around for launch - will it be a weekday?
[20:11] <jonsowman> most probably
[20:12] <jonsowman> hopefully next week
[20:12] <number10> if I could escape from work for an hour or so would you mind if I came over to the launch?
[20:12] <jonsowman> of course not
[20:13] <jonsowman> you're very welcome
[20:13] <number10> great - thanks
[20:13] <jonsowman> i'll be emailing the ukhas list
[20:14] <jonsowman> remind me nearer the time if I forget :)
[20:16] <number10> will do
[20:16] <jonsowman> might get the hardware soldered up tomorrow
[20:16] <jonsowman> hopefully it'll work
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[20:17] <number10> :)
[20:19] <jonsowman> you got any more planned number10?
[20:19] <riddermark> Hi all, me and 3 friends are planning to launch a balloon, but were completely new to the field, we're currently researching balloon options and the law surrounding the launch of high altitude balloons from the uk, can anyone provide us with links that might help?
[20:19] <riddermark> p.s. the website has been really useful!
[20:19] <number10> I have baloon and tracker, nothing planned just yet
[20:19] <number10> l
[20:20] <jonsowman> :)
[20:20] <jonsowman> riddermark: pretty much everything should be ok the ukhas site
[20:20] <jonsowman> but please do ask if you have any specific questions
[20:20] <jonsowman> where are you based?
[20:20] <riddermark> were based in essex
[20:21] <jonsowman> cool
[20:21] <riddermark> we've looked at the website but am unsure on the cost of getting permission to fly
[20:21] <jonsowman> it's free to apply for permission
[20:21] <riddermark> i think the closest site to launch from is in cambridge
[20:21] <riddermark> ah awesome
[20:21] <jonsowman> but yes, i'm part of the cambridge team
[20:21] <jonsowman> so if you want to come and launch from here, that's something we can probably arrange
[20:21] <riddermark> im right in saying there are restrictions on where to launch from yeah?
[20:21] <SpeedEvil> It's probably easiest to launch on a site with permission already.
[20:22] <riddermark> speedevil: thats what we thought
[20:22] <Upu> as long as you have permission of the land owner and a NOTAM from the CAA you can launch
[20:22] <riddermark> jonsowman: that would be amazing if we could one day!
[20:22] <jonsowman> riddermark: that shouldn't be a problem, what sort of timeframe are you looking at?
[20:22] <Upu> Cambridge has the pleasure of a permanent one :)
[20:22] <riddermark> upu: notam's are always required yes?
[20:23] <Upu> absolutely yes unless your balloon stays within a 2meter sphere which it won't if its latex
[20:23] <Upu> you can get away with foil party balloons
[20:23] <Upu> but anything latex / weather balloon is going to expand
[20:24] <riddermark> jonsowman: we're looking at launch early next year, due to current time restrictions and wanting to develop our project
[20:24] <jonsowman> riddermark: yep that sounds fine
[20:24] <Upu> Sounds a reasonable time scale
[20:24] <riddermark> The plan is to launch a latex/weather balloon and hopefully achieve 60-100,000ft, ideally 80,000ft minimum
[20:25] <riddermark> so even if we launched from Camb i'm guessing we would need a NOTAM?
[20:25] <jonsowman> no, we have a NOTAM at this site permanently
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[20:25] <jonsowman> so we would sort all that out for you
[20:25] <riddermark> ah perfec
[20:25] <Upu> really the best place to get information is here and the UKHAS wiki
[20:26] <riddermark> so i dont need to worry about licensing :)
[20:26] <Upu> NOTAM's aren't hard to apply for, to actually get is another matter :)
[20:26] <jonsowman> riddermark: correct
[20:26] Action: fsphil mumbbles something
[20:26] <jonsowman> lol fsphil
[20:26] <Upu> :)
[20:27] <riddermark> Upu, i've had a look and found the website really useful, but just wanted to chat with people to clarify :)
[20:27] <riddermark> lol
[20:27] <Upu> however as a few pointers try keep the payload below 1kg and avoid pokey sharp stabby bits
[20:27] <daveake> fsphil: you need to be called fsdave
[20:27] <jonsowman> "spears of death" is the cusf term
[20:27] <daveake> then there's no problem
[20:27] <Upu> :)
[20:27] <riddermark> our plan is to minimise pauload weight
[20:27] Nick change: fsphil -> fsdave
[20:27] <fsdave> "You've got mail"
[20:27] <Upu> you'll go higher on less gas
[20:27] <fsdave> ooh
[20:27] <fsdave> that was quick
[20:28] Nick change: fsdave -> fsphil
[20:28] <daveake> here have a notam :D
[20:28] <jonsowman> riddermark: lowering payload mass is always a good idea
[20:28] <jonsowman> what are you planning to launch?
[20:28] <riddermark> our background is working on the manufacture of components for satellites, this seemed like the perfect hobby to get into
[20:28] <Upu> might have a head start...
[20:28] <jonsowman> sounds like you know what you're doing then
[20:29] <riddermark> we're hoping to launch a payload to do high altitude photography whilst monitoring temp,pressure,alt,etc.
[20:29] <Upu> I wouldn't bother with pressure
[20:29] <riddermark> hopefully we will! we're aware of the conditions 100,000ft presents
[20:29] <Upu> its low up there
[20:29] <riddermark> we want to see it fall off and be geeky lol
[20:30] <riddermark> 1% at 100,000ft if i recall correctly?
[20:30] <Upu> the BMP085 sensor tends to give up above a certain altitude
[20:30] <jonsowman> riddermark: pressure sensors are a bit of a pain for this sort of application
[20:30] <jonsowman> the small MEMS type tend to bottom out at about 100mb
[20:30] <jonsowman> if you want one that goes lower they get expensive
[20:30] <Upu> btw talking of light : https://dl.dropbox.com/u/63720513/Images/HAB/IMG_0653.JPG
[20:30] <jonsowman> try Honeywell if you're interested
[20:30] <jonsowman> Upu: :D
[20:31] <Upu> needs an antenna and some wires but thats it
[20:31] <jonsowman> is there an NTX2 on the bottom?
[20:31] <Upu> RFM22B and a boost that runs from 1.5V battery
[20:31] <jonsowman> ah ok
[20:31] <Upu> all works
[20:31] <jonsowman> nice
[20:31] <jonsowman> :)
[20:31] <riddermark> that looks cool
[20:31] <Upu> going to do some tests to see how long it lasts tomorrow
[20:32] <Upu> https://dl.dropbox.com/u/63720513/Images/PCB%20Pictures/2012-06-12%2010.33.43.jpg thats the flip side
[20:32] <Upu> thx to fsphil for soldering that Boost converter on
[20:33] <jonsowman> nice
[20:33] <jonsowman> looks great
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[20:34] <Daviey> a
[20:34] <Upu> hello :)
[20:34] <riddermark> from first glance that look like a gps positioning chip with a wireless transiever onboard, will this broadcast your position over radio then?
[20:34] <jonsowman> that's the idea
[20:34] <riddermark> nice
[20:34] <jonsowman> we generally do tracking with narrowband FM telemetry links
[20:34] <riddermark> i thought there were restrictions with wireless downlink
[20:34] <jonsowman> there are indeed, we operate in the ISM band
[20:34] <jonsowman> so the limit is 10mW ERP
[20:35] <Upu> riddermark technically its just a customised Arduino Pro with a uBlox 6 GPS Chip, 70cms (434Mhz) radio module and a DC-DC boost converter
[20:35] <riddermark> which is unlicenced :)
[20:35] <riddermark> nice
[20:35] <jonsowman> licence-exempt, yeah
[20:35] <riddermark> sweet
[20:35] <Upu> The most commom radio transmitter is the Radiometrix NTX2
[20:35] <Upu> quite easy to use
[20:36] <Upu> and very well proven, though the RFM22B is more flexible
[20:36] <Upu> but there are other solutions out there just keep it legal :)
[20:36] <fsphil> I do still like the ntx2 vs the rfm22b
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[20:36] <riddermark> guessing the radio reciever units cost a little tho!
[20:36] <Upu> The NTX2 is a more consistent bit of kit
[20:37] <Upu> amateur radio gear I'm afraid
[20:37] <jonsowman> riddermark: mm, you need an SSB receiver
[20:37] <Upu> you can get a second hard FT-790R for £100 sometimes
[20:37] <Upu> hand even
[20:37] <Upu> it
[20:37] <Upu> http://www.ebay.co.uk/itm/YAESU-FT-790R-70cm-MULTIMODE-PORTABLE-TRANSCEIVER-/230806606836?pt=UK_Mobile_Phones_Communication_Ham_Radio_Receivers_Transceivers&hash=item35bd2553f4#ht_500wt_1413
[20:37] <Upu> 370
[20:37] <Upu> damn typing this evening £70
[20:38] <fsphil> speaking of typing, I'm glad linux doesn't lock the root password after three tries...
[20:38] <riddermark> thanks for the link!
[20:38] <jonsowman> bargain Upu
[20:38] <jonsowman> 7 days left though
[20:38] <Upu> yeah
[20:38] <jonsowman> still you should be able to get them for around £100
[20:39] <jonsowman> riddermark: alternatively, borrow one from a local radio club
[20:39] <jonsowman> are you amateur licensed?
[20:39] <riddermark> nope, unfortunately completely new to the field
[20:39] <jonsowman> it might be worth asking anyway
[20:40] <jonsowman> they're often very helpful
[20:40] Action: Upu raises an eye brown
[20:40] Action: Upu raises an eye brow
[20:40] <jonsowman> lol
[20:40] <jonsowman> okay, sometimes they're not
[20:40] <riddermark> lol
[20:40] <Upu> depends on the club
[20:40] <riddermark> cant hurt to ask!
[20:40] <Upu> being blunt sometimes they can be full of old gits who think if its not voice its not work bothering with
[20:41] <Upu> however alot of clubs are quite active and want new blood
[20:41] <jonsowman> they hold their value well anyway, so if you buy one you could sell it on with little or no loss
[20:41] <riddermark> thats a good shout
[20:41] <Upu> and don't forget when you come to launch theres every chance you'll have 20+ receivers listening in assisting
[20:42] <riddermark> we were thinking of hooking a 3g dongle and gps locator and transmitting the location via the net once it regains signal
[20:42] <riddermark> lol, so a few then :)
[20:42] <riddermark> seeing its our first outing
[20:42] <Upu> GSM doesn't work above 5km and 3G is sketcy at the best of times
[20:42] <jonsowman> if you come and launch at cusf we'll bring radios
[20:42] <Upu> use GSM as a backup
[20:42] <riddermark> good advice
[20:42] <Upu> but have the radio as the primary
[20:42] <Upu> its not hard to do
[20:43] <Upu> oh yeah baby
[20:43] <jonsowman> especially not for someone as experienced with this kind of thing as yourself
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[20:43] <jonsowman> you won't find it hard i'm sure
[20:44] <jonsowman> parts ordered for joey
[20:44] <jonsowman> woo
[20:44] <Upu> reminds me I need to place an order with Farnell
[20:44] <MrScienceMan> awww yeah
[20:45] <riddermark> awesome, well thanks for the info tonight guys, nice to meet you all - unfortunately i'm getting nagged by the mrs to watch the movie we have on lol
[20:45] <Upu> enjoy riddermark
[20:45] <jonsowman> riddermark: shout on here for info on launching from cam
[20:45] <riddermark> thanks all
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[20:47] <Lunar_Lander> hello
[20:49] <Upu> evening Lunar_Lander
[20:49] <Lunar_Lander> how are you?
[20:49] <Upu> very well thanks
[20:50] <Upu> hows the project coming along ?
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[20:54] <Lunar_Lander> today I made little progress, I wanted to test the 808 GPS jamming but because it rained I couldn't take the equipment out
[20:54] <Lunar_Lander> and without prior GPS lock, a test for jamming doesn't really work
[20:54] <Upu> it does jam it I can confirm that for you
[20:54] <Lunar_Lander> OHHHH
[20:54] <Upu> just wrap it in foil and keep it away from the GPS
[20:54] <Lunar_Lander> yea
[20:54] <Upu> I tested it last night
[20:55] Nick change: RobotCal1b -> RobotCaleb
[20:55] <Lunar_Lander> yeah
[20:55] <Lunar_Lander> what exactly did you do?
[20:56] <Upu> got a lock
[20:56] <Upu> read this : http://ava.upuaut.net/?p=306
[20:56] <Upu> :)
[20:56] <Lunar_Lander> cool thx :)
[20:56] <Lunar_Lander> give me a minute
[20:57] <Lunar_Lander> ah you got that AEE camera?
[20:57] <Upu> yeah
[20:58] <Lunar_Lander> ah
[20:58] <Lunar_Lander> but it's not the keyfob that they call 808?
[20:58] <Upu> its similar and has the same effect
[20:59] <Upu> I would assume it jams until proven otherwise
[20:59] <Lunar_Lander> yeah
[21:00] <Upu> afk dog walk
[21:01] <MrScienceMan> the camera jams the gps
[21:01] <MrScienceMan> how the....
[21:01] <teebnis> ./part
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[21:01] <fsphil> it generates RF in the wrong parts of the spectrum
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[21:02] <fsphil> shouldn't be putting out much RF at all, but they've so little shielding
[21:02] <Lunar_Lander> yea
[21:02] <MrScienceMan> where is the RF coming frmo?
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[21:02] <MrScienceMan> i mean, whats making it?
[21:03] <fsphil> high frequency circuits in the camera
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[21:03] <MrScienceMan> so unshielded they have the potential to distrupt gps signal
[21:03] <fsphil> yep
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[21:04] <fsphil> the tracks on the circuit board can act just like antennas
[21:04] <MrScienceMan> yeh, i just didnt think that it would be that powerful
[21:04] <MrScienceMan> or is the gps simply very sensitive
[21:04] <fsphil> doesn't have to be - gps signals are very faint
[21:05] <fsphil> yep
[21:06] <Lunar_Lander> oh
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[21:16] <Lunar_Lander> may I shout a random word?
[21:17] <Upu> no
[21:17] <Upu> :)
[21:17] <Lunar_Lander> xD
[21:17] <jonsowman> Upu: do you have any SL1202s around?
[21:17] <Upu> yeah loads
[21:18] <jonsowman> might need a few, will check tomorrow
[21:18] <jonsowman> how much are you after for them?
[21:18] <Upu> I have 40+
[21:18] <Upu> http://ava.upuaut.net/store/index.php?route=product/product&path=59_65&product_id=54
[21:18] <jonsowman> ta
[21:18] <Upu> £6.73 less 10%
[21:18] <Upu> use coupon code UKHAS
[21:18] <jonsowman> ta :)
[21:18] <jonsowman> will check if there are any in the lab tomorrow
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[21:19] <Upu> I bought 50 as they were really iffy as to when they are going to replace them
[21:19] <Upu> and I don't want to end up with a pile of PCB's I can't get antennas for
[21:19] <jonsowman> yeah that'd be bad
[21:19] <jonsowman> where do you get them from?
[21:19] <Upu> RS
[21:19] <jonsowman> oh ok
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[21:38] Nick change: M6DSA -> danielsaul
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[21:53] <griffonbot> @b3noxley: @notch Creeper up in near space! There's no-where they can't attack.... http://t.co/h2GyeuqL #creeper #minecraft #UKHAS http://t.co/AB7g27aQ [http://twitter.com/b3noxley/status/212663834127773697]
[21:53] <fsphil> wot
[21:53] <jonsowman> haha :D
[21:53] <jonsowman> i wasn't allowed to say
[21:56] <thecduck> hahaha!
[21:56] <thecduck> nice.
[21:56] <benoxley> :P
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[21:58] <Lunar_Lander> XD
[21:59] <benoxley> surprised it hadn't been done already...
[21:59] <jonsowman> me too
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[22:59] <RocketBoy> only in cambridge: http://www.youtube.com/watch?v=tXayNZqSygo
[22:59] <jonsowman> hahah
[23:00] <RocketBoy> you cambridge lads are smart
[23:00] <RocketBoy> no feeder loss!
[23:00] <jonsowman> :D
[23:01] <jonsowman> dear me
[23:01] <RocketBoy> made me smile
[23:01] <RocketBoy> nights
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[23:08] <Lunar_Lander> good night!
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[00:00] --- Wed Jun 13 2012