[00:00] <Vaizki> http://www.taivaanvahti.fi/images/uploads/201503/34620_1d2309338c63dc3d0ca5bee9c5a26672.jpg
[00:00] <Vaizki> well it's a bit ridicilous outside
[00:00] <Vaizki> unfortunately must really sleep
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[00:31] <SpacenearUS> New vehicle on the map: 03HENRY_chase - 12http://tracker.habhub.org/#!qm=All&q=HENRY_chase
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[00:45] <fsphil> rather fantastic aurora earlier
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[04:25] <sloopjb11> Free Floater Balloon Calculators for H and He to download....
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[08:15] <SpacenearUS> New vehicle on the map: 03KRYTEN - 12http://tracker.habhub.org/#!qm=All&q=KRYTEN
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[08:36] <tweetBot> @nerdsville: All set for tonights talk/demonstration of HAB tracking and decoding of SSDV images at SKARS http://t.co/SqoGCe8z9y #ukhas #hab
[08:39] <fsphil> ooh
[08:40] <fsphil> good idea. we'll need lots of receivers
[08:44] <daveake> s/ack/ak/
[08:45] <jcoxon> fsphil, did you get some aurora pics?
[08:47] <fsphil> only a few sadly, camera packed in
[08:47] <fsphil> took some more on a friends camera, will get a copy of those today
[08:47] <fsphil> pretty amazing
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[08:53] <fsphil> https://www.flickr.com/photos/fsphil/16229880824/
[08:54] <jcoxon> oh wow
[08:54] <fsphil> it got a lot better abour 30 minutes after that. silly battery
[08:54] <jcoxon> haha
[08:54] <fsphil> found a nice dark site
[08:54] <fsphil> and it seemed to disappear, thought we'd not see any more
[08:54] <fsphil> then within a few seconds the sky just lit up
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[08:54] <jcoxon> i wish it wasn't cloudy here, the beach is good for sky watching (e.g. meteor showers)
[08:55] <fsphil> yea coasts are perfect for that
[08:55] <jcoxon> had a good view of the geminid's
[08:56] <infaddict> forecast is lots of cloud here in UK for Friday ;-(
[08:56] <fsphil> I missed a meteor in one of those photos by a few seconds too. ah well
[08:56] <fsphil> it was the fastest moving aurora I've seen so far
[08:57] <jcoxon> ooo i'm 'partially' cloudy here for friday
[08:57] <jcoxon> if its cloudy on friday i'll just track daveake's balloon
[08:57] <fsphil> heh, "Light Rain Shower"
[08:58] <fsphil> I don't mind, last night makes up for it
[08:58] <infaddict> yep we are all relying on daveake if the weather is bad
[08:58] <fsphil> no pressure daveake
[08:59] <infaddict> ok guys, i'm about to order my first PCB. After feedback I've made some small changes: http://gerblook.org/pcb/Xc5SnWFyvZwUG9sVBZFo39#front
[08:59] <daveake> I'm feeling no pressure whatsoever
[08:59] <infaddict> if anybody can spot anything wrong or that could be improved please shout ;-)
[08:59] <daveake> </lie_mode>
[08:59] <infaddict> lol
[08:59] <jcoxon> daveake, 0 pressure?
[09:00] <fsphil> hah
[09:00] <fsphil> daveake is currently in equilibrium with his environment
[09:00] <jcoxon> infaddict, i appreciate its a little late, but experience tells me that breaking out as many pins as you can from the micro helps in the future
[09:01] <infaddict> ah right, so even if not using them today, break them out to a pad?
[09:01] <infaddict> for future
[09:01] <jcoxon> i've still got old boards that i use for other projects as the pins are easy to access
[09:01] <fsphil> are you soldering an arudino board to your board?
[09:02] <infaddict> yes fsphil i am creating a kinda motherboard to solder on a mini pro board, a gps board and sdcard board.
[09:02] <Vaizki> hehe Mathias Rust just signed on as a member of the Friends of Malmi Airport society, that's the airfield here in Helsinki from where he flew to the Red Square in 1987
[09:02] <infaddict> plus components like temp sensors, ntx2b etc
[09:03] <Vaizki> and now that airport is under threat of closure & demolition
[09:03] <jcoxon> infaddict, does the ntx2b radio vcc pass through R3?
[09:04] <fsphil> good spot
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[09:04] <infaddict> the trace on bottom feeds VCC
[09:04] <infaddict> but let me check
[09:04] <Vaizki> yes that's bad.. but you should pull NTX2 voltage straight from the 6V battery,
[09:05] <Vaizki> no need to run it regulated through the arduino mini
[09:05] <jcoxon> infaddict, one wire sensors are particularly fickle
[09:06] <infaddict> in what sense jcoxon? been working well for me including in my freezer.
[09:06] <jcoxon> okay good, i find that if there is an issues it takes down the whole set
[09:07] <jcoxon> but i stil use them :-)
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[09:07] <infaddict> Vaizki: so ntx2b can take 2.9V through 15V. what are advantages of using 6V battery (unreg) vs a 3.3V (reg)?
[09:08] <fsphil> less load on the 3.3v reg
[09:08] <Vaizki> putting load on the 3.3v
[09:08] <Vaizki> and each regulation loses power
[09:08] <infaddict> ok thx, i can reroute than no problem
[09:08] <fsphil> how is the DS1820 wired to the arduino?
[09:08] <fsphil> is it sharing the data line with the ntx2 power?
[09:08] <infaddict> middle pin is the data pin
[09:08] <infaddict> going to digi pin on arduino
[09:09] <infaddict> and then to external plug
[09:09] <infaddict> for external sensor
[09:09] <fsphil> oh that's the EN pin
[09:09] <Vaizki> EN and VCC are tied together
[09:09] <infaddict> correct
[09:10] <fsphil> yes. EN is wired to the DS
[09:10] <Vaizki> that won't work though
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[09:10] <fsphil> I don't see where else it's connected, other than through R3
[09:10] <fsphil> unless there's a trace underneath?
[09:11] <Vaizki> something is wonky there yes
[09:11] <fsphil> R3 is your pullup resistor
[09:11] <fsphil> I'm guessing?
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[09:11] <Vaizki> yea there is no power to either DS18b20 or NTX2B now
[09:13] <infaddict> the power runs from VCC on arduino to GPS then up to the DS18b20
[09:13] <infaddict> last leg is a bottom trace
[09:13] <infaddict> but i will be fixing the resistor part anyway based on prev feedback
[09:13] <infaddict> and ntx2 will now get raw from battery
[09:13] <Vaizki> oh ok right yes.. was a bit of a long way :)
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[09:14] <infaddict> sadly with the U shape of the arduino board no way to get out unless i route between 2 very close pins
[09:14] <infaddict> so have to go around
[09:14] <fsphil> you could drop the arduino and just put in an atmega328p
[09:15] <infaddict> yep fsphil if my soldering experience was more than 25 mins ;-)
[09:15] <Vaizki> move the arduino down a bit
[09:15] <infaddict> hence me using boards for first attempt
[09:15] <fsphil> infaddict: the chip would have fewer pins than the arduino board :)
[09:15] <infaddict> but arent they teeny?
[09:15] <Vaizki> no
[09:15] <fsphil> there are large through hole versions
[09:15] <Vaizki> same pin spacing as mini
[09:16] <fsphil> though you'd have to add your own regulator. not hard though
[09:16] <infaddict> ok that might be my path for V2 then
[09:16] <fsphil> worth trying for the next version
[09:16] <infaddict> yep thx
[09:16] <fsphil> you're using i2c for the gps?
[09:16] <Vaizki> but you need voltage regulator, 4 capacitors, crystal etc as aux components
[09:16] <infaddict> yes fsphil
[09:17] <infaddict> also, i'm mounting ntx2b vertically to same space. any reason to fold it down horizontally?
[09:17] <Vaizki> does ublox or mini board have i2c pullup resistors integrated?
[09:17] <infaddict> yes
[09:17] <fsphil> not really. I suppose it does shield it a bit more
[09:17] <Vaizki> infaddict, it's quite unprotected on one side that's all
[09:17] <fsphil> but that's not important for this
[09:18] <infaddict> unprotected from what? moisture? interference?
[09:18] <Vaizki> or fat fingers and esd?
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[09:18] <Vaizki> I dunno. didn't look too robust so I put it on its side :)
[09:19] <infaddict> ok some great feedback guys, really appreciate it. will rework it today!
[09:19] <Vaizki> also if you have NTX2B vcc and en hardwired to battery, even if your arduino dies from moisture or something you will have a carrier signal to direction find
[09:20] <infaddict> very true, hadnt thought of that
[09:20] <infaddict> as you say i will move arduino down to allow VCC routing around top too
[09:21] <Vaizki> also as said, add header pads to unused pins
[09:22] <infaddict> yep. finally getting hang of basic Eagle stuff so shouldn't take too long. sadly have to work today but will do this tonight.
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[09:23] <Babs____> Are upu and daveake doing the eclipse launch tomorrow?
[09:23] <infaddict> i believe daveake is doing one Friday for BBC stargazing live
[09:24] <Vaizki> here is my current design, unchanged from 3 weeks or so ago
[09:24] <Vaizki> http://gerblook.org/pcb/oJbG7erTU4z7XmYwbL47Y8
[09:24] <Babs____> Cool - very media
[09:24] <daveake> Eclipse is Friday
[09:24] <Vaizki> it's a bit too tightly packed though because I used wrong size resistors originally
[09:25] <Vaizki> aaaand it's my first PCB ever :)
[09:25] <Babs____> I got a birthday card from
[09:25] <Babs____> Brian cox
[09:26] <Babs____> (Genuinely)
[09:26] <Vaizki> any comments welcome also, I will be changing the power connector when I figure out what I will be using..
[09:26] <infaddict> wow Babs____ impressive!
[09:27] <Babs____> Did you get the pointy thing working daveake?
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[09:27] <daveake> Nah not had time
[09:27] <Babs____> I know the feeling
[09:29] <SpacenearUS> New vehicle on the map: 03RIMMER - 12http://tracker.habhub.org/#!qm=All&q=RIMMER
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[09:31] <Darkside> i sense a theme with this launch
[09:31] <daveake> haha
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[09:32] <Babs____> He didn't put a lot of effort into it to be fair http://flic.kr/p/rFcjv6
[09:32] <daveake> Well it's for the beeb I thought I might as well use some of their scifi characters :)
[09:32] <Darkside> but it was on Dave!
[09:32] <Darkside> well, the new series
[09:32] <daveake> True!
[09:32] <daveake> Perfect then :)
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[09:34] <infaddict> so RIMMER and KRYTON to come then ;-)
[09:34] <infaddict> sry LISTER
[09:35] <Vaizki> KRYTEN is on the map...
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[09:35] <daveake> LISTER is the 869.5MHz one
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[09:36] <jcoxon> daveake, do you have details of your planned freqs etc?
[09:36] <daveake> mailing list :)
[09:36] <jcoxon> no mention of 869!
[09:37] <jcoxon> :-)
[09:37] <daveake> Might not happen - I'll add it if it does
[09:37] <jcoxon> is it lora?
[09:37] <daveake> yes
[09:37] <jcoxon> okay will be interesting to see what happens to ukhasnet
[09:37] <daveake> 250Hz bandwidth
[09:38] <Darkside> KHz*
[09:38] <daveake> oops
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[09:39] <fsphil> may as well call mine CAT
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[09:39] <daveake> :)
[09:39] <daveake> The other tracker is all HHGTTG stuff
[09:39] <SpacenearUS> New vehicle on the map: 03Monster_chase - 12http://tracker.habhub.org/#!qm=All&q=Monster_chase
[09:41] <Vaizki> 250kHz bandwidth will have all the FCD pro+ people scratching their heads :)
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[09:41] <daveake> It'll be pretty weak
[09:42] <jcoxon> daveake, can't persuade you to fly a ukhasnet node then...
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[09:43] <daveake> Not if I get everything finished ... I want to send 1920x1080 images
[09:43] <jcoxon> oh wow
[09:43] <edmoore> that's quite big
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[09:44] Action: jcoxon gets the yagi out to setup on the beach on friday
[09:44] <edmoore> presumably you work to a filesize rather than a resolution?
[09:44] <jcoxon> edmoore, ssdv would be per pixel though
[09:44] <jcoxon> oh wait its not is it
[09:45] <daveake> It's jpeg compression
[09:45] <edmoore> i don't think so, otherwise no point doing compression
[09:45] <fsphil> it's still jpeg
[09:45] <daveake> I fix the image sizes
[09:45] <daveake> (in pixels)
[09:45] <fsphil> nice picture
[09:46] <jcoxon> i feel i should provide a public service to local people to see the eclipse from above the clouds
[09:46] <edmoore> fsphil, with your intuition about jpeg, is it better/worse/equivalent to have a smaller image with less compression resampled up to resolution XYZ, or a native XYZ image with higher compression?
[09:46] <edmoore> i.e. assuming you are constrained by the filesize you can send
[09:47] <edmoore> they're equivalent in an information theory sense but everything to do with how your brain/eyes perceives image quality seems to not respect information theory, in my experience
[09:47] <fsphil> I'd prefer starting larger. jpeg compression artifacts look pretty bad enlarged
[09:48] <fsphil> yea it should be the same but definitly isn't
[09:48] <edmoore> :)
[09:48] <fsphil> the jpeg artifacts are quite high frequency, you don't notice them unless you zoom in
[09:48] <edmoore> well it'll be cool to Tx HD images down from a hab
[09:49] <edmoore> sure, though i was assuming you'd do fairly smooth interpolation
[09:49] <edmoore> to resample
[09:50] <fsphil> the one thing you can't get away from with jpeg is blocking artifacts
[09:50] <fsphil> the edges of the 8x8 blocks always stand out unless the quality is very high
[09:52] <edmoore> they're better in jpeg2000
[09:52] <edmoore> because it uses wavelets rather than DCT
[09:52] <fsphil> the guys making the Daala video codec have some interesting (complicated) tricks to reduce the effect
[09:52] <Darkside> hrm
[09:53] <Darkside> wavelets
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[09:53] <Darkside> dont remember much about wavelet transforms
[09:53] <edmoore> https://www.dropbox.com/s/jvcndfc558cb1gx/Screenshot%202015-03-18%2009.52.37.png?dl=0
[09:53] <Darkside> i presume its doing something like reconstructing the image from a bunch of basis functions?
[09:53] <edmoore> yes
[09:53] <edmoore> but so is normal jpeg
[09:54] <Darkside> mmk
[09:54] <edmoore> all i really remember about wavelets is that they professor who ran our research group invented the duel-tree complex wavelet transform, which was super awesome but no one really knew what to do with it
[09:54] <edmoore> so it was a running joke that you could try and use the DTCWT if you had a problem to solve, regardless of the problem
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[09:55] <Darkside> i remember someon ementioned this a few years ago
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[09:55] <edmoore> adamgreig might mention it because he's in the same research lab
[09:55] <fsphil> the trouble with jpeg is that it was quite well designed, for its age
[09:55] <fsphil> the potential replacements are not dramatically better
[09:55] <edmoore> but i think jpeg2000 is jpeg but s/DCT/wavelet and s/huffman_coding/arithmetic_coding
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[09:57] <edmoore> hi ejcweb
[09:58] <Geoff-G8DHE-M> Upuwork, Tks received the chip and splitter, so sufficient time to solder it in for Friday :-)
[09:58] <edmoore> we had to implement jpeg for a signal processing lab once, it was quite a useful exercise
[09:58] <edmoore> especially as it made you consider all the engineering practicalities
[09:58] <Darkside> yeah i did that
[09:58] <Darkside> was good fun
[09:58] <Darkside> we also did CDMA IS-95
[09:58] <edmoore> like when convolving an image with a kernel, what do you assume all the imaginary pixels to the left of the image are
[09:59] <edmoore> do you assume they're 0, do you assume they're a mirror image of the actual image, do you assume they wrap
[10:00] <Darkside> mm
[10:00] <Darkside> man wtf am i doing
[10:00] <Darkside> was about to start doing a pcb design for work
[10:00] <Darkside> no no no
[10:00] <edmoore> it's after work for you right?
[10:00] <Darkside> yes
[10:00] <Darkside> and i have altium designer available at work
[10:00] <edmoore> yeah don't do that
[10:00] <Darkside> yeah
[10:01] <Darkside> its just a breakout
[10:01] <Darkside> but still no
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[10:31] <SpacenearUS> New position from 03MTG003 after 033 days silence - 12http://tracker.habhub.org/#!qm=All&q=MTG003
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[12:03] <SpacenearUS> New vehicle on the map: 03MARVIN - 12http://tracker.habhub.org/#!qm=All&q=MARVIN
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[12:04] <SpacenearUS> New vehicle on the map: 03ZAPHOD - 12http://tracker.habhub.org/#!qm=All&q=ZAPHOD
[12:14] <henryplumb> Afternoon all
[12:14] <henryplumb> Quick question
[12:14] <henryplumb> How much line from balloon -> parachute and parachute -> payload ?
[12:15] <edmoore> 5m - 10m
[12:15] <henryplumb> for both lengths?
[12:15] <craag> 5m, 10m. respectively.
[12:16] <henryplumb> so balloon -> parachute 5m and parachute -> payload 10m ?
[12:16] <craag> yep
[12:16] <Geoff-G8DHE> Remmenants of balloon then don't foul the payload
[12:16] <henryplumb> ah, excellent, thanks guys :)
[12:17] <henryplumb> and also, attaching line to the foam/polystrene box - what method do you use?
[12:20] <craag> You want some kind of cradle around the box.
[12:21] <craag> You can either do this outside the box, or through the corners and re-inforce the holes with straws.
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[12:26] <henryplumb> sorry, i was on the phone :P
[12:26] <henryplumb> so i should put the lines through the box walls?
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[12:27] <craag> I'd start with just a cradle outside the box.
[12:27] <henryplumb> so what should i make this cradle from?
[12:28] <craag> I had sensors at the midpoints of several sides, so that didn't work for me.
[12:28] <craag> The same cord.
[12:28] <craag> (seperate bit, to tie onto the main line though)
[12:28] <henryplumb> so the main line comes down to the payload then i split into four lines which form a cradle around the payload?
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[12:32] <craag> Taking one piece of cord
[12:33] <craag> Something like this: http://www.animatedknots.com/parcel/
[12:33] <craag> But loose so the box hangs from it
[12:34] <craag> Other may be a lot better at explaining this...
[12:34] <henryplumb> Ah right, I see and then just duct tape the lines to the box to secure?
[12:34] <craag> Yeah
[12:35] <henryplumb> Okay, I think I'll try that - cheers for your help craag :)
[12:35] <craag> Try something, shake it around a lot, retry until you're happy it's secure.
[12:35] <henryplumb> ^ right, will do
[12:35] <craag> :)
[12:39] <PE2G> henryplumb: Morning. The Netherlands met-office want parachute redundancy for their ozone sondes and use a dual parachute train:
[12:39] <PE2G> This is their train: Balloon -- 5 meter -- upper chute -- 7 meter -- lower chute -- 15 meter -- payload.
[12:40] <PE2G> Parachutes are Aeromet PC110
[12:40] <PE2G> http://www.aeromet.de/Produkte/Fallschirme/Tech__Spezifikationen_Fallschi/tech__spezifikationen_fallschi.html
[12:46] <PE2G> If you wish, I can send you a couple of PC110s, used but in good condition.
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[12:52] <henryplumb> My apologies, I'm at work so I didn't see your message originally - never seen a dual parachute system before
[12:52] <henryplumb> ^ PE2G
[12:55] <henryplumb> 6
[12:55] <henryplumb> oops - not sure how i sent that 6 lol
[12:56] <PE2G> Met-office started using two chutes a couple of months ago, after a pedestrian was nearly hit by a crashing ozone sonde with a single malfunctioning parachute
[12:59] <henryplumb> PE2G - probably a good idea then lol
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[13:01] <SpacenearUS> New vehicle on the map: 03CALLSIGN123_chase - 12http://tracker.habhub.org/#!qm=All&q=CALLSIGN123_chase
[13:02] <SpeedEvil> http://xkcd.com/ genius
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[13:03] <henryplumb> PE2G - how much do you want for the PC110 parachutes?
[13:04] <prog> he should swap africa and the americas
[13:04] <PE2G> henryplumb: Postage only is OK with me.
[13:05] <henryplumb> Really? That would be great - how much would postage to me in the UK be rougly?
[13:05] <henryplumb> * roughly?
[13:06] <PE2G> Standby for that, I have to look that up. The parachutes are light of course
[13:06] <henryplumb> righty, thanks - you can email me at henry.plumb@gmail.com if that would be easier for you :)
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[13:08] <PE2G> henryplumb: Ok, I´ll mail you. Postage with Track & Trace is 13 euro, without T&T 9 euro
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[13:09] <henryplumb> That sounds great, if you mail me, we can sort it out there :)
[13:09] <henryplumb> ^ PE2G
[13:09] <PE2G> henryplumb: OK
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[15:20] <tweetBot> @AnthonyStirk: Live images from the eclipse part of BBC Star Gazing live on Friday come receive the transmissions and join in #ukhas #hamr @AMSAT_UK
[15:21] <jcoxon> i'll be tracking from whitstable beach
[15:22] <Upu> awesome
[15:22] <Upu> I think there is going to be 5 SSDV payloads up
[15:22] <jcoxon> i'll get out the yagi then
[15:23] <fsphil> we need all the receivers
[15:23] <Upu> you have @ in here fsphil ?
[15:23] <fsphil> don't think so
[15:23] <tweetBot> @SUSpaceflight: @AnthonyStirk @AMSAT_UK anyone positioned near the South coast there will be SSDV heading over the channel too #ukhas http://t.co/b1xpQppzJh
[15:23] <Babs____> Are you doing all five Anthony?
[15:23] <henryplumb> i'll be tracking from Cambridge
[15:23] <craag> SUSF will be doing 2x, flying South from Salisbury.
[15:24] <jcoxon> i think we might need a coordination wiki page
[15:24] <craag> Making for the french coast.
[15:24] <infaddict> where is the launch site for the bbc?
[15:24] <fsphil> good idea jcoxon
[15:24] <infaddict> did daveake say leicester?
[15:24] <Upu> 2 Babs____
[15:24] <henryplumb> infaddict Leicester Racecourse
[15:24] <Upu> with daveake
[15:24] <infaddict> thx henryplumb
[15:24] <Upu> fsphil is doing a floater
[15:24] <henryplumb> :)
[15:24] <infaddict> its gonna be busy!
[15:25] <infaddict> hope no overlapping frequencies
[15:25] <Babs____> Cool - and just a rely on general slow spinning to make sure you get one in the right direction? I like the law of averages
[15:25] <fsphil> hoping anyway. the CAA are doing their dramatic last minute thing again
[15:25] <craag> infaddict: Not so far :)
[15:25] <Babs____> Man - he approved BABSHAB the day before it was due to go up
[15:25] <Babs____> Application went in 2 months previously
[15:26] <mattbrejza> did you poke him or did it just turn up?
[15:26] <Babs____> Although I think at the time he was overrun with applications
[15:26] <Babs____> I poked him incessantly in the last week
[15:26] <mattbrejza> oh ok
[15:27] <Babs____> Turned out I was launching in a fairly busy area for air traffic though
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[15:27] <Babs____> So I probably wasn't making his job easy
[15:28] #highaltitude: mode change '+o jcoxon' by ChanServ!ChanServ@services.
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[15:31] <infaddict> looks like due South predictions from Leicester on Friday morning
[15:32] <daveake> Yes, I've been following predictions quite closesly :p
[15:32] <daveake> closely
[15:32] <infaddict> hehe
[15:33] #highaltitude: mode change '+o fsphil' by ChanServ!ChanServ@services.
[15:34] #highaltitude: mode change '-o fsphil' by ChanServ!ChanServ@services.
[15:34] Action: jcoxon is compiling dl-fdligi in preparation
[15:34] <jcoxon> not the first time i've compiled it...
[15:35] <Babs____> Adherence to International Standard HAB time will be interesting
[15:35] <mattbrejza> our notam will probably say 7am
[15:35] <mattbrejza> so is kinda critical
[15:35] <mattbrejza> on monday we were on time though
[15:36] <Babs____> Mine was 7am - was a very early start
[15:36] <fsphil> I'm trying to hack dl-fldigi atm, to receive the udp stream from gqrx
[15:36] <fsphil> and bypass pulseaudio
[15:36] <craag> gonna be about as early as monday :P
[15:36] <fsphil> I have it receiving the audio but the samplerate is all wrong
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[15:40] <Geoff-G8DHE> Its going to be Manic Friday AM!
[15:40] <mattbrejza> any lora?
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[15:41] <daveake> Yes, RIMMER and ZAPHOD
[15:42] <mattbrejza> cool, ill see how my handheld ones
[15:43] <Geoff-G8DHE> I'll be receiving two channels worth of LoRa here and 4+ RTTY channels
[15:43] <daveake> excellent
[15:44] <daveake> We'll have Yagis and Pi gateways up on the balcony at the racecourse grandstand
[15:44] <daveake> which, handily, faces south
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[15:46] <infaddict> is there a record for number of receivers?!
[15:46] <mattbrejza> tbh lora was working from insdie a building, not sure youll need that balcony :P
[15:46] <craag> jcoxon: A wiki page with info about all the flights would be ideal.
[15:47] <craag> Frequencies, prediction screenshots, schedule, and link to tracking guides + webirc
[15:47] <craag> Then we can just spam that out to ham clubs and the like.
[15:48] <infaddict> daveake: are they filming the chase/recovery?
[15:48] <Geoff-G8DHE> Can people try to make sure they get the RIGHT frequency on the Flight docs as well!
[15:48] <craag> We're supposed to put frequencies on the flights docs?? :P
[15:49] <Geoff-G8DHE> Payloads as well then ;-)
[15:49] <craag> Yeah that's what I meant.
[15:49] <craag> We're using ntx2s, so it won't change for us.
[15:50] <Geoff-G8DHE> I just use what appears on the Calendar! I don't fill them out ;-)
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[16:17] <jcoxon> dl-fldigi compiled
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[16:20] <fsphil> which version are you using?
[16:21] <jcoxon> the one off my github
[16:21] <jcoxon> will that do?
[16:22] <fsphil> should do. there was a version that had a newer rtty decoder
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[16:22] <fsphil> it might have had some issues but I've lost my notes
[16:25] <jcoxon> yes i remember that fun
[16:26] <jcoxon> i seem to remember we never updated the repo with that code
[16:27] <fsphil> there have been several new fldigi releases since then. might be worth trying those
[16:27] <jcoxon> eek
[16:27] <jcoxon> :-)
[16:27] <jcoxon> bbiab
[16:28] <craag> Building 3.1 tag should be safest?
[16:33] <Laurenceb> is anyone launching in scotland?
[16:42] <nickjohnson> Upvotes greatly appreciated: https://news.ycombinator.com/item?id=9226763
[16:43] <SpacenearUS> New position from 03STBAL2 after 033 days silence - 12http://tracker.habhub.org/#!qm=All&q=STBAL2
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[16:44] <jcoxon> Laurenceb, not that i'm aware of
[16:45] <infaddict> Laurenceb: I'm starting to feel left out up North ;-)
[16:46] <craag> infaddict: Where are you based?
[16:47] <infaddict> South Shields on mouth of River Tyne
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[16:47] <craag> Ah, the proper north :)
[16:47] <infaddict> ha!
[16:47] <infaddict> cant get much further north without being in Scotland
[16:47] <infaddict> about 40-50 miles
[16:48] <craag> Yep, only been up there twice. Once by coach, once by bicycle. Not sure which felt longer ;P
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[16:56] <Vaizki> nick, can we get 3d printer model for case gratis? ;)
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[17:45] <SpacenearUS> New vehicle on the map: 03BUZZ - 12http://tracker.habhub.org/#!qm=All&q=BUZZ
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[17:54] <nickjohnson> Vaizki: It's a stretch goal!
[17:54] <nickjohnson> Vaizki: So, if you want it for free, make sure as many people back it as possible ;)
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[17:54] <Vaizki> ah
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[18:40] <TT7> Hello everybody
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[18:45] <TT7> I am currently running some tests on my tracker after I updated the code based on your tips. Meanwhile, I have one more question. I came across a couple of people saying that their 1600g Hwoyee ballons burst prematurely and did not reach the targeted altitude (40km). Is it something that happens a lot (like 1 out of 3) or was that just a bad luck?
[18:46] <amell> sounds like you need every listener you can get on friday morning - im not around unfortunately, but I could leave my gqrx etc running if someone wants to take an internet stream?
[18:46] <amell> is there a websdr type package available for the mac? happy to expose my radio etc for friday
[18:48] <Upu> TT7 1600g's are only meant to get to 37km
[18:48] <Upu> however occasiuonally they go much higher
[18:48] <Upu> not so much these days
[18:49] <TT7> Upu I thought that these were the ones used in the record flights
[18:49] <Upu> they were
[18:49] <Upu> there was a period back in 2011 (?) where they were cracking 44km
[18:50] <Upu> however they don't do that these days
[18:50] <amell> they stopped putting special sauce on them?
[18:50] <Vaizki> amell: if you find one let me know... what radio do you have?
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[18:51] <amell> high end plastic RTL dongle. atomically calibrated.
[18:51] <Vaizki> ok what does that mean.. :)
[18:51] <Vaizki> you keep saying that!
[18:51] <Upu> £10 cheap job
[18:52] <amell> well, £7 - it works. and the frequency is correct.
[18:52] <TT7> Upu you mean because the manufacturer makes them differently or because of the weather conditions?
[18:52] <Upu> manufacture
[18:53] <Upu> they don't make 'em like they use too
[18:53] <Upu> used
[18:54] <TT7> Upu hmm, that is a shame. I'd like to get above 40km. Well, I guess I'll have to be picky about the weather conditons and hope for the best.
[18:54] <Upu> if you are very light (<50g)
[18:54] <Upu> use H2
[18:55] <Upu> pray to the diety or dieties of your choice you still might get 40km
[18:55] <Vaizki> amell: if you have gqrx and a rtl-sdr, you can maybe use the rtl_tcp server to stream it over the internet
[18:55] <amell> Has anyone actually launched a durex HAB yet?
[18:55] <Vaizki> some older versions of gqrx had it bundled but the new one doesn't seem to
[18:55] <amell> Vaizki: that is an option, but frequency control is problematic.
[18:56] <Ian_> only as training wheels amell , Jumbo unlubricated :)
[18:56] <Vaizki> doesn't rtl_tcp allow a remote gqrx to change the frequency?
[18:57] <amell> yes it does, but it doesnt follow the correct standards from what i could see.
[18:57] <Ian_> Cheap and very cheerful puff, puff
[18:57] <Vaizki> ah after mac port building gqrx I have rtl_tcp under /opt/local/bn
[18:57] <Vaizki> bin
[18:57] <Vaizki> what do you mean doesn't follow standards hmm
[18:58] <TT7> it'll be about 150g and it'll be helium. If the burst diameter still remains 10-11m for the 1600g, my predictor shows it should be enough to get to 40km on some days.
[18:58] <Vaizki> I have to test this
[18:58] <Upu> I think you'll make it
[18:58] <Upu> IF you use H2
[18:58] <Upu> and 3m/s ascent
[18:58] <amell> Vaizki: where are you located? we can try it if you are out of range of the eclipse balloons
[18:58] <Vaizki> I am in Finland :)
[18:58] <Vaizki> so quite out of rage
[18:58] <Vaizki> raNge
[18:59] <Vaizki> rage-finn reporting for duty
[18:59] <amell> ok. so if we test gqrx control. you can see if you can remote control my gqrx for the eclipse balloons?
[18:59] <TT7> I'll try my best :-)
[19:01] <Vaizki> I will try locally how rtl_tcp works first
[19:01] <amell> do you have a static ip?
[19:02] <Vaizki> no
[19:02] <Vaizki> but I will be at work Friday morning and there I have a static IP
[19:02] <amell> will move to pm and see if we can get this working.
[19:02] <Vaizki> ok so at least on my local network this rtl_tcp works somewhat
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[19:13] <gartmann> Upu: Hi upu! I have ordered a Pi In the Sky Kit and an Airspy a few days ago and yesterday as I was chatting they recommended my to buy a HABAmp 434Mhz/70cms Filter & Preamp For Dongles
[19:14] <gartmann> and I was wondering if you could tell me what other related product should I buy in order to make it work
[19:14] <gartmann> cables... power supply... etc
[19:14] <Upu> hey gartmann
[19:15] <Upu> I think just the joiner
[19:15] <gartmann> could you send me the link
[19:15] <gartmann> please
[19:15] <Upu> http://ava.upuaut.net/store/index.php?route=product/product&path=71_66&product_id=75
[19:15] <Upu> anything you order won't ship until Mon/Tue sorry
[19:15] <Upu> Launches :/
[19:15] <gartmann> no problem
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[19:16] <henryplumb> Evening :)
[19:17] <Upu> evening
[19:18] Action: amell observes Vaizki interfering with his radio via rtl_tcp
[19:19] <gartmann> Upu: But I also need a power supply for the HABAmp
[19:19] <gartmann> Upu: do you sell any?
[19:19] <gartmann> Upu: sorry about my n00b questions but I am pretty new into the subject ;)
[19:20] <craag> It'll take any 6-9V PSU with a DC jack.
[19:20] <craag> NOT 12V I believe
[19:20] <Upu> I don't
[19:20] <Upu> it will take 5-25V now
[19:20] <Upu> people wanted to use them in cars
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[19:21] <craag> :D
[19:21] <Upu> I don't sell power supplies
[19:21] <craag> Yep, twas a bit of pain :)
[19:21] <Upu> however I am considering a USB power cable
[19:21] <Upu> have one here
[19:21] <Upu> I supply a plug
[19:21] <Upu> you can solder onto something
[19:21] <Upu> anyway
[19:21] <Upu> airspy does biast ?
[19:22] <Upu> open, flick switch to biast, close. Enable bias t on airspy
[19:22] <Upu> job jobbed
[19:22] <gartmann> Upu: what does it mean "airspy does biast"?
[19:22] <Upu> don't ask me how to do the last bit my airspy hasn't arrived
[19:22] <gartmann> Upu: mine neither... can't wait to get it
[19:23] <Upu> stuff like the fun cube dongle and I think the air spy have the ability to provide power up the antenna line using a bias -t
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[19:23] <Upu> if you turn it on 5V is stuck up the antenna line
[19:23] <Upu> which the habamp can use to power
[19:23] <Upu> so no external power needed
[19:23] <gartmann> Upu: ok so I don't need any power supply
[19:23] <Upu> as long as you put the switch in the correct position
[19:23] <Upu> if airspy does bias-t
[19:23] <Upu> I think it does but check
[19:24] <TT7> Upu since you're talking business.. If I buy a couple of JTI antennas and an Ublox Max module, do you send it in a letter or a parcel? I am looking at the Royal Mail shipping
[19:24] <Upu> well I normally do recorded
[19:24] <Upu> but the shop can't differentiate so most stuff is small packet
[19:25] <Upu> order it and put collect in shop I'll work out the postage for you
[19:25] <Upu> afk food
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[19:26] <amell> should we rename this channel to #habsupplies?
[19:26] <gartmann> Upu: that's what I found about the Airspy: The Bias-Tee option: 4.5v @ 50mA In some cases, one may need a very low noise figure. For example, some satellite communication systems require a front end with a noise figure as low as 0.2dB. In such case, using an external preamplifier near the antenna system can improve the overall operation. The Bias-Tee option allows powering such a preamplifier directly from Airspy by injecting
[19:26] <gartmann> are the requirements ok for the HABAmp?
[19:27] <Upu> yep fine
[19:29] <gartmann> cool thx
[19:29] <gartmann> is that correct how I want to connect alll those devices: laptop---micro usb--->Airspy---SMA cable--->habamp---SMA Male to SMA Male Joiner--->Antenna
[19:29] <gartmann> ?
[19:30] <gartmann> Upu: or am I missing something
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[19:35] <TT7> Upu the shop estimates the shipping to £10.56 (Czech Republic). I am not ordering just yet.
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[19:38] <gartmann> Upu: what antenna to you recommend?
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[19:40] <Lunar_Lander> evening
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[19:47] <amell> great, sorted so vaizki will remote control my radio on friday morning :)
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[19:50] <amell> I cant actually see any planned launches on snus calendar.
[19:51] <craag> I don't think any of the flight docs have been approved yet
[19:51] <craag> I've just made ours, won't be approved til we've finished tweaking
[19:51] <amell> any frequency conflicts?
[19:52] <craag> nope, we've been co-ordinating
[19:52] <craag> 6x trackers so far iirc
[19:52] <daveake> well I have 3 trackers 5 transmitters
[19:52] <daveake> fsphil 1/1
[19:53] <craag> ok, 8x then
[19:53] <craag> :)
[19:53] <craag> (2x here)
[19:53] <daveake> :)
[19:53] <daveake> And none on 650
[19:53] <daveake> Progress :)
[19:53] <craag> *hams everywhere cheer*
[19:53] <daveake> till barc launch anyway
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[19:54] <myself> Hm. I have access to a very fancy GPS/GNSS signal simulator for the next few weeks. (SMBV100A, fyi). I'm planning to cook up some "interesting" scenarios and record them with my SDR, for later use (with a hackrf, or later demodulating from wav, etc) in testing receivers an' such.
[19:54] <myself> Curious if anyone has a library of KML files or something, hypothetical scenarios that I could just drop in, or if I'll have to write my own.
[19:55] <craag> Upu: ^^
[19:55] <edmoore> yeah upu might bite your arm off
[19:55] <edmoore> i told him to rent a R+S
[19:55] <edmoore> exactly what you have
[19:55] <myself> Heh. Yup. they just dropped one in $employer's lab to try to convince $employer to buy it.
[19:55] <edmoore> yes
[19:55] <edmoore> i had one for a couple of weeks
[19:55] <edmoore> same scenario
[19:55] <edmoore> didn;t buy it
[19:56] <edmoore> was about £50k+ with the options i wanted
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[19:57] <myself> I'm gonna bug my manager about after-hours access so I can stop getting the stinkeye from the guard at 9pm. ..
[19:57] <edmoore> lol
[19:57] <edmoore> i'm lucky to get away b4 9 atm :)
[19:57] <gartmann> what is better for balloon tracking an Airspy or a Funcube Pro+?
[19:58] <edmoore> don't know but i i have never known anyone use an airspy and have known loads of people use a funcube with excellent results
[19:59] <gartmann> because I saw that they have similar price range
[20:00] <edmoore> i'd go with the FCD+ but that's based on not knowing a great deal about the airspy
[20:00] <gartmann> Upu: Do you recommend an Airspy or a Funcube Pro+?
[20:00] <edmoore> lol
[20:00] <gartmann> edmoore: sorry didn't see your answer!
[20:01] <gartmann> well I have to admit that I have no clue yet about radio stuff
[20:01] <Vaizki> yea so I will stram I/Q data at 7Mbps from amell's super atomic avenger dongle to Finland and see what I can catch...
[20:01] <gartmann> but I want to learn it with sending a balloon into the stratosphere :)
[20:04] <Ian_> A bit like learning atomic theory by making a bomb ;(
[20:04] <gartmann> Ian_: ahaha yeah!! My colleagues at work also think that I am mad
[20:05] <gartmann> Ian_: as I told them about my plan
[20:05] <amell> Vaizki is quite impressed by how noisy the radio spectrum is round these parts :)
[20:05] <Vaizki> indeed
[20:06] <mikestir> you should hear it round here :(
[20:06] <amell> I guess all you hear in finland is russian military radio...
[20:09] <gartmann> id there anybody who has experience with FCP+ and Airspy who could tell me which one is better for what?
[20:10] <Vaizki> https://dl.dropboxusercontent.com/u/367935/Espoo-144MHz.png
[20:11] <Vaizki> sooo busy on 2m here...
[20:12] <mikestir> gartmann: I'd expect FCD to have better dynamic range which means it will tolerate nearby strong signals better, and since you don't need the Airspy's wide bandwidth for hab then the FCD would be a better choice
[20:13] <gartmann> mikestir: ok thx a lot
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[20:14] <gartmann> mikestir: last day I was chatting on the airspy channel and they where clashing the FCD+
[20:14] Nick change: fl_0|afk -> fl_0
[20:14] <gartmann> that's why I wanted a second opinion
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[20:17] <Geoff-G8DHE> I use a Airspy, but never used an FCD :)
[20:18] <Vaizki> same here
[20:18] <Vaizki> they are quite different in design so can't say which is universally better
[20:18] <gartmann> Geoff-G8DHE: and are you happy with it?
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[20:18] <Upu> I think both will suffice your needs
[20:18] <Vaizki> FCD has more bits on the ADC but airspy oversamples etc
[20:18] <Geoff-G8DHE> WThe Airspy uses a 12bit ADC whch I think is better than an FCD ? And hence gives the better dynamic range ?
[20:19] <SpacenearUS> New position from 03NERDTEST after 033 days silence - 12http://tracker.habhub.org/#!qm=All&q=NERDTEST
[20:19] <Upu> you're only decoding RTTY
[20:19] <Vaizki> and if Upu sells you a hab amp for the front-end which will take care of filtering
[20:19] <gartmann> what is the minimum amount of stations you recommend in order to track a balloon?
[20:19] <Vaizki> one? :)
[20:19] <Geoff-G8DHE> Very happy with it, have used the Bias T to run the HabAmp as well no problem.
[20:19] <Upu> one gartmann you
[20:19] <Vaizki> https://dl.dropboxusercontent.com/u/367935/Espoo-70cm-ISM.png
[20:19] <Upu> the rest are just a bonus
[20:19] <gartmann> Vaizki: I just ordered it a few minutes ago :)
[20:19] <Vaizki> just to tick you guys off..
[20:20] <Vaizki> Airspy on 70cm ISM here
[20:20] <Upu> don't even want to show you 70cms here
[20:20] <Vaizki> not too busy
[20:20] <Vaizki> oh I saw it
[20:20] <Upu> I didn't go down past 434.000
[20:20] <Vaizki> from operating amell's rtl-sdr remotely
[20:21] <Vaizki> the bright blip on my waterfall is my own clas ohlson wireless temperature monitor
[20:21] <Upu> http://i.imgur.com/JYQSg7R.jpg
[20:21] <Upu> check 433.900
[20:22] <Vaizki> hehe
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[20:22] <Vaizki> here be dragons
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[20:27] <prog> Geoff-G8DHE: can you share an IQ recording at 625ksps ?
[20:28] <Geoff-G8DHE> Probably, let me look
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[20:28] <edmoore> busy here today
[20:31] <Geoff-G8DHE> prog, Any particular sort of signal, not much around here at present
[20:31] <Upu> yeah suspect it may get busier over the next 2 days
[20:33] <Vaizki> Geoff-G8DHE: now you HAVE to find an fm channel playing rick astley...
[20:33] <Geoff-G8DHE> Hehe :)
[20:33] <edmoore> there are some pretty major astronomical events taking place in the next 48 hrs, it's true
[20:33] <Vaizki> you ain't been rickroll'd if it wasn't 12bit i/q
[20:34] <edmoore> mostly the first firing of a subscale sabre rocket engine
[20:34] <edmoore> and also something about the moon being somewhere
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[20:34] <prog> Geoff-G8DHE: any balloon signal
[20:35] <Geoff-G8DHE> No balloons at present Rick Astley on FM ?
[20:36] <prog> I just want to see how clean is the spectrum with your setup
[20:38] <Geoff-G8DHE> OK well an image here http://360.g8dhe.net/hab_flights/HABAMP_and_DONGLE/index.php?ind=6 and recording at the moment
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[20:39] <Geoff-G8DHE> Should add that the FM modulator is a cheap and nasty device stereo but just gives me covearge of the house!
[20:40] <Geoff-G8DHE> Now questiuon is where did it put the recoding!
[20:42] <Geoff-G8DHE> right foubd the record button!
[20:42] <gartmann> Does anybody use a HackRF to track the ballons? Is it any good?
[20:44] <Upu> I use a BladeRF
[20:44] <Upu> which is excellent
[20:46] <gartmann> Upu: which one of all those radios has the better value / money?
[20:47] <Upu> neither for what you want
[20:47] <Upu> I understand the Airspy to be extremely good value
[20:47] <Upu> the HackRf and BladeRF can transmit too
[20:48] <prog> excellent. thanks.
[20:48] <prog> Upu: did you see Leif's shootout?
[20:48] <Upu> may have done
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[20:49] <prog> just saying. when it comes to RX, we're far better ;-)
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[20:50] <edmoore> we?
[20:50] <Upu> define we ?
[20:50] <prog> the "airspy guys"
[20:50] <Upu> ah
[20:50] <edmoore> /nick ;)
[20:50] <prog> this is my nickname since ages
[20:51] <prog> before even knowing a shit about SDR hehe
[20:52] <Upu> well
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[20:52] <Upu> if you represent Airspy
[20:52] <Upu> my advise is as follows
[20:52] <Upu> ship the god damn product :)
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[20:52] <Upu> but yes I've heard its very good
[20:53] <prog> We're about to sign a contract with pjm for distributing the spies in the UK
[20:53] <gartmann> prog: yes hurry up I can't wait to get mine too ;o)
[20:53] <prog> no more waiting
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[20:54] <gartmann> prog: I was wondering how big are the batches?
[20:54] <Upu> so how "we" are you ? Do you work / represent / design Airspy ?
[20:54] <prog> 400 to 500
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[20:55] <prog> we're two guys doing the design, our partner Itead studio is doing the manufacturing
[20:55] <Upu> ah ok
[20:55] <Upu> quick pm then if you don't mind
[20:55] <prog> np
[20:56] <Geoff-G8DHE> Right they've all been Rick Rolled Vaizki ;-)
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[21:09] <SpacenearUS> New vehicle on the map: 03NACNUD - 12http://tracker.habhub.org/#!qm=All&q=NACNUD
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[21:12] <Vaizki> Geoff-G8DHE: you deserve to be knighted
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[21:16] <SpacenearUS> New vehicle on the map: 03OLAF - 12http://tracker.habhub.org/#!qm=All&q=OLAF
[21:16] <Reb-SM0ULC> olaf.... is it frozen?
[21:16] <daveake> set it free
[21:18] <fl_0> what is meant bei "LoRa"?
[21:19] <craag> It will be set free
[21:19] <craag> On friday morning at 7am :)
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[21:19] <craag> s/It/He/
[21:20] <Geoff-G8DHE> fl_0, Its these chips http://www.hoperf.com/rf/lora/RFM98W.htm there being used for telemetry
[21:21] <fl_0> Geoff-G8DHE: ah nice. LoRa = Long Range Modem :)
[21:21] <fl_0> can that be decoded with hams equipment?
[21:21] <craag> Not currently
[21:22] <Geoff-G8DHE> http://360.g8dhe.net/hab_flights/LoRa/ propriety design for the protocol
[21:22] <fl_0> so one would need some of their chips for decoding?
[21:22] <craag> exactly
[21:22] <fl_0> kk
[21:22] <fl_0> :(
[21:23] <Laurenceb_> someone needs to make a decoder
[21:23] <craag> People are working on it
[21:23] <Laurenceb_> has anyone grabbed it with an SDR in IQ mode?
[21:23] <Laurenceb_> ok
[21:24] <Laurenceb_> apparently its FEC + chirp modulation
[21:24] <craag> the packet structure and symbol mapping is mostly known I believe
[21:24] <Laurenceb_> ok
[21:24] <Laurenceb_> tbh im not convinced its the best idea
[21:24] <craag> next step is the fec parameters
[21:25] <Laurenceb_> you can get almost equivalent performance out of an si446x
[21:25] <craag> It's performance for us on monday was extremely impressive
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[21:27] <Laurenceb_> im getting 156dB link budget with a si446x at 200bps
[21:29] Nick change: fl_0 -> fl_0|afk
[21:30] <SpeedEvil> That is insane.
[21:30] <Laurenceb_> well LoRa claims >160dB
[21:30] <Laurenceb_> but its vulnerable to narrowband jamming
[21:30] <Laurenceb_> Semtech have a poor LNA on the front of their LoRa ICs, its ~12dB NF
[21:31] <Laurenceb_> silabs are down around 2 or something really good
[21:32] <Laurenceb_> but yeah, its enough for a 200bps picoballoon -> cubesat uplink
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[21:37] <infaddict> prog, any timeline for uk distro?
[21:37] <prog> It's really imminent. I'll publish it on the website and here on IRC when done.
[21:38] <infaddict> ok thx
[21:39] <infaddict> whats the uk price do u know?
[21:39] <amell> any truth to the airspy lite rumour?
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[21:39] <amell> I need an excuse to get rid of this shitty £7 SDR.
[21:40] <infaddict> haha me too amell
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[21:40] <amell> perhaps airspy could have a built in LoRa decoder? lolz
[21:40] <prog> it costs $199 shipped from China.. I don't know what's the limit of viability in the UK
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[21:40] Nick change: maounis_ -> maounis
[21:41] <amell> $199 is more than what most people are willing to pay for SDR
[21:41] <amell> so i guess you must be targeting the high end.
[21:42] <prog> well. It was designed with urban environment in mind
[21:42] <prog> strong pagers etc.
[21:42] <prog> there will be a cheaper version in the end of the year
[21:42] <amell> if it was $140 or so I think you will sell a lot more.
[21:42] <prog> I hope it will be ready for christmas
[21:43] <amell> is that 2015 or 2016?
[21:43] <amell> <sorry, couldnt resist>
[21:43] <prog> Q4 2015
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[21:44] <prog> it won't have the "expert goodies" of airspy, but will work just for people wanting to upgrade from the el cheapo dongles
[21:44] <amell> thats what most people here are likely to be looking for.
[21:44] <Laurenceb_> http://photoshopscaresme.com/tutorial-powering-a-gopro-for-days-with-external-power-and-an-intervalometer/
[21:45] <Laurenceb_> eeek horror stories
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[21:46] <tweetBot> @philcrump2: Assembling SUSF payloads for Friday morning launch. #ukhas http://t.co/wpsWUkBt2n
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[21:49] <Laurenceb_> shrug i like to live dangerously
[21:49] <Lunar_Lander> good news
[21:49] <Laurenceb_> I'm going to try external power to a gopro
[21:49] <Lunar_Lander> egg and heart
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[21:55] <SpacenearUS> New vehicle on the map: 03SEBA-9 - 12http://tracker.habhub.org/#!qm=All&q=SEBA-9
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[22:03] <infaddict> made some changes to my PCB so any feedback or problems you spot would be great: https://www.dropbox.com/s/zge7j81uey5ofuy/HAB1.zip?dl=0 or http://gerblook.org/pcb/jXkj7ZkE4gTNc7ZJZPu4FX#front
[22:04] <Upu> getting better infaddict
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[22:05] <Upu> but I would still hang that chip antenna off the side of the board
[22:05] <SP9UOB-Tom> evening all
[22:05] <infaddict> ok, even tho no copper under
[22:07] <Reb-SM0ULC> SP9UOB-Tom: evening tomasz
[22:08] <SP9UOB-Tom> evening Reb-SM0ULC
[22:10] <SP9UOB-Tom> please approve : 9eea3832ef1a379e4624a12491a11dfc
[22:11] <SpeedEvil> http://aurorawatch.lancs.ac.uk/
[22:11] <SpeedEvil> sigh
[22:11] <SpeedEvil> (nothing tonight, when it's clear here)
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[22:43] <amell> infaddict: you are using 6V - what battery is that?
[22:43] <infaddict> amell: its a 4 x 1.5V AA pack wired to a 2 pin connector
[22:45] <amell> arduino mini daughter board?
[22:45] <infaddict> yep mini pro 3.3V board
[22:45] <amell> why have you drill holes and pads for the end? surely that will have pins pointing up for the FTDI connection
[22:46] <Lunar_Lander> good night
[22:46] <infaddict> yer i dont need the holes, as you say i will solder 90 degree headers onto the arduino
[22:47] <amell> im just thinking that they may interfere with the underside of the board.
[22:47] <Vaizki> sleep for me too, nite&
[22:47] <infaddict> night Lunar_Lander and Vaizki
[22:49] <infaddict> not sure on any interference amell. would a pad/hole cause that? its not wired to anything (not even gnd)
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[22:49] <amell> i mean, like shorts. because that is where the soldered side will be.
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[22:55] <myself> Upu: Hey, I hear you might be the person to talk to about GPS testing ideas. I don't know if I'm gonna be able to bring a bunch of receivers into the lab at work, but what I *can* do is generate a scenario with the simulator, and *record* it with my HackRF or some such, for later playback into receivers under test. My immediate need is for useful scenarios -- KML files seem the obvious way to do things. Are you aware of a HAB-relevant ...
[22:55] <myself> ... library of synthetic or actual KML files, to exercise things like speed/altitude limits, mathematical limits, etc?
[22:57] <Upu> I don't think its quite as easy as that
[22:57] <myself> I'm specifically *not* interested in things like signal sensitivity, temperature and power, all that stuff. Strictly numbers, cocom limits, that sort of thing. I'm confident I can figure out how to work the SDR side of things to inhale a few hours of RF samples. What I need are the KMLs to feed into the satellite simulator to make it spit out the hilarious RF traces.
[22:57] <Upu> I'll be interested if you think you can make it work
[22:57] <Upu> you can download old flights as kml's
[22:58] <amell> you have a GPS sat simulator?
[22:58] <Upu> no was considering one but just got a repeater instead
[22:59] <amell> didnt know they existed. interesting
[22:59] <Upu> they are over £4000
[22:59] <amell> rig up to an amp and big antenna. confuse all the sat nav systems
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[23:00] <Upu> only slightly illegal
[23:00] <amell> definately.
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[23:00] <myself> I have a GPS sat simulator at work. And several others have made their way around the lab recently..
[23:00] <Upu> pm
[23:00] <myself> I can't stand to see 'em go by without making use of 'em :)
[23:01] <myself> And I figure it's easier to ask the silly thing to pretend we've just ascended to 200,000 feet, than to actually build a balloon to do that :P
[23:01] <theRealSIbot> In real units: 200,000 ft = 61 km
[23:03] <myself> (plus with the actual take-things-up scenario, a failure MIGHT be a math overflow in the GPS chip, or it might be temperature or power or who knows whatever else. Doing it on the bench in controlled conditions lets me test one limit at a time.
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[23:04] <infaddict> night all
[23:04] <amell> i guess it will catch all those new payloads who forget to set flight mode.
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[23:47] <SpacenearUS> New vehicle on the map: 03EAGLE - 12http://tracker.habhub.org/#!qm=All&q=EAGLE
[23:48] <daveake> Tranquility base ?
[23:48] <fsphil> well, it's a base
[23:49] <fsphil> all seems to be working. just needs lots of bubbewrap filler and duct tape
[23:49] <daveake> ofc
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[23:53] <myself> roger that, twanq... tranquility, we copy you on the graound.
[23:54] <myself> You got a bunch of guys about to turn blue, we're breathing again.
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[00:00] --- Thu Mar 19 2015