highaltitude.log.20160130

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[03:04] <Laurenceb_> UBSEDS has a magic self recharging cell
[03:05] <SpeedEvil> you mean solar?
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[07:15] <R34lB0rg> morning
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[07:59] <SM0ULC-Reb> morrn!
[07:59] <SM0ULC-Reb> UBSEDS13 still alive!
[08:01] <R34lB0rg> and PS-58 too
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[08:08] <R34lB0rg> PS-58 has arrived over sierra leone
[08:13] <Oddstr13> Isn't UBSEDS13 powered by a single AA cell or some such?
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[08:23] <Oddstr13> oooh, it might pass straight over my head
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[08:38] <SA6BSS-Mike> if battery holds out, it should travel over icelnad and come throught over aprs
[08:39] <SA6BSS-Mike> and then it comed you/our way Oddstr13 :)
[08:49] <Oddstr13> estimated timeframe on that?
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[10:30] <HAB360> Good morning humans
[10:31] <daveake> you might be in the wrong room :)
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[10:33] <HAB360> Hello daveake
[10:34] <daveake> morning
[10:37] <SM0ULC-Reb> Oddstr13: qth?
[10:37] Action: SM0ULC-Reb goldfish
[10:37] <SA6BSS-Mike> central Norway
[10:44] <HAB360> www.hab360.space
[10:44] <HAB360> This is my current project
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[10:58] <SM0ULC-Reb> SA6BSS-Mike: central nowary.. trondheim.. ;)
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[11:05] <SM0ULC-Reb> HAB360: how many cameras ?
[11:06] <HAB360> 6
[11:07] <HAB360> https://twitter.com/hab360
[11:07] <HAB360> www.facebook.com/hab360
[11:08] <R34lB0rg> *following*
[11:08] <HAB360> fab
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[11:18] <SM0ULC-Reb> HAB360: how many in the team?
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[11:20] <HAB360> well mainly myself I have got some great help from edmoore
[11:22] <eroomde> speak of the devil and he doth appear
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[11:22] <eroomde> i help with balloon advice and i shall pobably help with launch and chase
[11:23] <HAB360> fantastic, hello Ed
[11:23] <eroomde> yo
[11:24] <eroomde> quiet here on sat mornings
[11:24] <SM0ULC-Reb> HAB360: oki, is it 6 in a ring or aiming for up/down views also?
[11:25] <HAB360> thats fine, been up all night configuring the camera setup and stitching test footage. still a long way to go but almost there editing wise
[11:25] <HAB360> 1 each side of a cube
[11:26] <HAB360> so all directions
[11:28] <HAB360> images can be seen here: https://www.instagram.com/hab360/
[11:28] <SM0ULC-Reb> >90 degree views from the cameras?
[11:30] <R34lB0rg> 360° of view
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[11:31] <eroomde> R34lB0rg: i think he's asking per-camera
[11:32] <SM0ULC-Reb> HAB360: nice "enclosure"
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[11:37] <HAB360> each camera should have a field view of around 180degrees to compensate for stitching
[11:38] <HAB360> gopro have fisheye lenses
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[11:40] <SM0ULC-Reb> ah
[11:41] <SM0ULC-Reb> HAB360: i guess it's live and with 4k?
[11:42] <HAB360> eroomde - the new GoPro BacPac arrived today and so far so good
[11:42] <eroomde> they all fit?
[11:42] <HAB360> unfortunately only ground use will be highest resolution as I need 3 hours of battery and recording time
[11:43] <HAB360> yeah, i have made a small extension arm for each mount
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[11:51] <SM0ULC-Reb> HAB360: will be cool to see the result :)
[11:52] <HAB360> will keep you all posted
[11:53] <SM0ULC-Reb> HAB360: spent about 10 years at the land survey of sweden so have seen a bit of stiching of pics :)
[11:55] <HAB360> ahh thats fantastic! self teaching myself to stitch all 6 video files is proving quite challenging! especially as i didn't know which camera position was correct to start with but i'm getting there
[12:00] <SM0ULC-Reb> HAB360: you have a bit of a challenge since i guess you will stitch lossy compressed data but maybe is not tah big of a problem when running video
[12:02] <SM0ULC-Reb> HAB360: a bit easier when shooting with 70% overlapping and handling raw data
[12:03] <HAB360> time will tell. Off to film a music concert tonight in 360. Will keep you posted
[12:03] <SM0ULC-Reb> HAB360: sensors for detecting the spin / 3d movement?
[12:04] <HAB360> no, but the end result will be viewed wearing an oculus rift virtual reality headset
[12:04] <R34lB0rg> HAB360, can you feed a time signal to the cameras?
[12:05] <R34lB0rg> you'll always have a reference to the horizon but sensor data would make it easier
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[12:06] <SM0ULC-Reb> HAB360: just thought since the payload normally have a tendency to spin. would be cool to at least have some data to stabilize the view
[12:06] <SM0ULC-Reb> R34lB0rg: i thought most of the spinning
[12:06] <HAB360> ahh I see what you are saying. the software i will be using uses the horizon as the edit point
[12:07] <HAB360> I'm not sure how I could do that as the cameras are sealed off in waterproof diving housings
[12:08] <R34lB0rg> if you have 360° of view you want to be able to look around - right?
[12:08] <HAB360> yeah
[12:09] <SM0ULC-Reb> HAB360: you the time within/from the videos right? use some external thing to record movement and then use when processing afterwards. you it's possible to get usable spin-data..
[12:09] <R34lB0rg> now are looking down the balloon bursts and you are suddenly looking to the heaven
[12:09] <R34lB0rg> i think you will want to do some spin stabilization postprocessing
[12:10] <SM0ULC-Reb> HAB360: electronic compass / gyro.. compass does not have to be calibrated to north, just record angles over time
[12:10] <HAB360> interesting, this is something to look into
[12:11] <R34lB0rg> adding a compass log now will cost some $
[12:11] <R34lB0rg> post-processing everything with reference to the horizon would be a hard job
[12:11] Action: SpeedEvil throws a kalman filter at R34lB0rg.
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[12:14] <HAB360> all noted and will investigate further. thanks for your thoughts. sleep is calling.
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[12:18] <fsphil> sleep?
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[12:40] <SM0ULC-Reb> LordKalma: worst case $5 gone..
[12:46] <eroomde> fsphil: i think he's been experimenting with it for gigs and firedancers and stuff
[12:46] <eroomde> nightowl
[12:47] <fsphil> ah ha
[12:49] <fsphil> it's a good idea. would love to see the results through the headset
[12:50] <eroomde> yeah
[12:55] <g0hww> think i must have pulled the belling-lee type coax adapter out of the rtl dongle when i was up the loft
[12:55] <eroomde> they are hateful things
[12:55] <g0hww> gr-air-modes fires it up ok, but no detects
[12:56] <g0hww> indeed
[12:57] <g0hww> good job i only use it for adsb which i mostly ignore anyway
[12:58] <fsphil> I can forgive the inventor, just not everyone who kept using it long after better plugs appeared
[12:58] <g0hww> which is almost any plug
[12:59] <g0hww> the good news is that the trip to the loft installed a pair of notch filters between my discone and my preamp, so now i can cure all the intermod at the receiver end
[12:59] <fsphil> nice
[13:00] <g0hww> and i have 5 other receivers so i can forget the rtl dongle for a bit, which was connected to its own L-band antenna
[13:00] <g0hww> just need some balloons to listen to now :)
[13:01] <g0hww> i got a sniff of the welsh one last weekend
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[13:22] <Ian_> eroomde, as hab360 is abed, questionable wisdom of gopro sealed in waterproof cases? I hope that your mentee is an attentive listener to all your advice.
[13:23] <Ian_> Some of the cameras won't have a horizon ref of course.
[13:25] <eroomde> mentee is probably a bit strong, i helped with a shopping list of balloon stuff. i'll mention it to him
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[13:39] <Ian_> It would certainly be a shame if fogging was a problem in an otherwise successful flight, even if 35k isn't quite reached . . . :)
[13:47] <Ian_> Sometimes advice needs to be stressed - a 2' length of 2"x2" juggled whilst delivering advice may give cause for thought/concern! As is compulsory reading of the HAB project fail modes and wisdom of having the courage to delay for a day if all is not correct.
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[13:49] <eroomde> if he lauches from churchill he will be suitable marinated in it
[13:49] <eroomde> suitably*
[13:50] <astrobiologist> afternoon all
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[13:56] <garymortimer> Watching UBSEDS13 coasting out from Newfoundland, splendid job. Well done all involved if they are hanging out here
[13:57] <mattbrejza> !track UBSEDS13
[13:57] <SpacenearUS> 03mattbrejza: Here you go - 12http://tracker.habhub.org/#!qm=All&q=UBSEDS13
[13:57] <mattbrejza> (thats the only way i know to get the full trace of just one balloon
[13:59] <astrobiologist> somebody ought to fly a balloon called RAVEN$
[13:59] <astrobiologist> and when it transmits for the last time somebody can say "thus spoke the RAVEN nevermore"
[14:00] <astrobiologist> I had a sort of garymortimer - Joan Aitken segue take over me there. apols
[14:04] <garymortimer> I wish I understood that!
[14:05] <garymortimer> I wonder if V01QU realises what his APRS setup is forwarding at the minute
[14:09] <garymortimer> Perhaps folks should send thank you QSL cards to the far flung stations
[14:11] <mattbrejza> what balloon is on ubseds13?
[14:12] <Ian_> Lol ed - safe hands.
[14:15] <SpacenearUS> New vehicle on the map: 03KD0SCM - 12http://tracker.habhub.org/#!qm=All&q=KD0SCM
[14:15] <Geoff-G8DHE-Lap> mattbrejza, http://www.bristol-seds.co.uk/hab/flight/2016/01/20/ubseds13.html
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[14:15] <mattbrejza> ah :)
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[14:29] <Laurenceb_> UBSEDS13 continues t magically recharge
[14:31] <SpacenearUS> New vehicle on the map: 03ON3PCB_chase - 12http://tracker.habhub.org/#!qm=All&q=ON3PCB_chase
[14:31] <lz1dev> must be one of those perptual battries
[14:33] <SA6BSS-Mike> still 1.42V as good as new :)
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[14:38] <fsphil> I must get my radio ready, could head this way
[14:39] <Laurenceb_> this is interesting
[14:39] <Laurenceb_> http://www.theregister.co.uk/2016/01/29/google_fcc_internet_balloons_approval/
[14:39] <mattbrejza> how often does it transmit spra?
[14:39] <mattbrejza> aors>
[14:39] <mattbrejza> er aprs
[14:39] <Laurenceb_> sounds like they finally went off their drugs and went for mm wave backhaul
[14:39] <Laurenceb_> every 4 minutes
[14:40] <mattbrejza> and gps sleeps inbetween tx?
[14:40] <Laurenceb_> lol 1.483v wtf
[14:40] <Laurenceb_> yes
[14:40] <mattbrejza> AAA?
[14:40] <Laurenceb_> AA
[14:40] <mattbrejza> k
[14:40] <craag> lolwat
[14:40] <fsphil> EH
[14:40] <fsphil> it's in canada
[14:41] <fsphil> .hysplit UBSECS13
[14:41] <SpacenearUS> 03fsphil: No HYSPLIT for that callsign
[14:41] <fsphil> .hysplit UBSEDS13
[14:41] <SpacenearUS> 03fsphil: HYSPLIT for 03UBSEDS13 - 12http://spacenear.us/tracker/hysplit_cache/160130-10_158282_UBSEDS13.gif
[14:41] <fsphil> too far north for me
[14:42] <fsphil> not often that happens
[14:43] <Laurenceb_> hmm looks like loon uses 630mW mm wave with 0.5 degree beamwidth
[14:43] <Laurenceb_> probably good enough for just yaw axis pointing
[14:44] <Laurenceb_> thats going to use quite a few watts for mesh networking
[14:44] <mattbrejza> what were they using previously?
[14:45] <Laurenceb_> nothing :P
[14:45] <SpeedEvil> 0.5 degree beamwidth to another balloon at high altitude is going to have fuck all footprint on the ground
[14:45] <SpeedEvil> even neglecting the power
[14:45] <Laurenceb_> SpeedEvil: this is the backhaul
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[14:45] <Laurenceb_> balloon to ground uses off the shelf LTE/4G
[14:45] <SpeedEvil> oh
[14:46] <mattbrejza> oh
[14:46] <Laurenceb_> aiui they havent tested the backhaul yet
[14:46] <Laurenceb_> but their previous patent was all optical
[14:46] <Laurenceb_> with optical amplification etc
[14:46] <Laurenceb_> highly mental
[14:47] <Laurenceb_> this mm wave system should be capable of >10Gb/s per link, seems way saner to me
[14:49] <SpeedEvil> It might arguably be pointed not at now, but 10 years out
[14:49] <SpeedEvil> when optical might be usable
[14:49] <Laurenceb_> but it sounds like they'll have some work cut out to make it anything but a power eating monstrosity
[14:53] <astrobiologist> in a recent radcom there was a guy showing how you could illuminate dust in the atmosphere using a 1W LED and a big lens from Poundshop, and detect it using another lens and a LCD and a sensitive transistor amplifier
[14:53] <astrobiologist> Obviously not the same thing but would be fun on a HAB!
[14:54] <russss> it would be exceedingly neat, and quite difficult
[14:54] <astrobiologist> 30km range or so... he'd turn on the transmitter, drive some way away, set up the sensor to point to the same area of sky, and he could pick up the morse pulses from the transmitter
[14:55] <astrobiologist> I was interested in the detector for molecular biology applications to avoid using PMTs etc.
[14:56] <astrobiologist> but would also make a good hab com link.
[14:56] <astrobiologist> but it's all LORA these days now...
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[15:34] <gonzo_> I byuild an optical systrem liuke you described. But it would not be feasable for hab
[15:35] <gonzo_> the TX used a quite high gain antenna (lens) poinred at the RX station
[15:35] <SpacenearUS> New vehicle on the map: 03SP9UOB - 12http://tracker.habhub.org/#!qm=All&q=SP9UOB
[15:36] <gonzo_> at quite high accuracy. And you woudl be limited to launching at night with zero cloud
[15:37] <fsphil> you built one for data?
[15:37] <gonzo_> nope, analiogue
[15:37] <russss> need a geostationary ukhas relay satellite
[15:38] <gonzo_> you launch it, we will use it!
[15:38] <russss> and some infeasibly accurate stabilisation system
[15:38] <russss> and the moon on a stick
[15:39] <fsphil> SDR on the moon
[15:39] <gonzo_> we tested it by pointing the TX and RX at a surface across a field, just using reflection. And played music #
[15:39] <fsphil> I've send music over a laser, it sounded a bit crap
[15:40] <gonzo_> =you could probably get data down the links, but yoru snr is going to limit that
[15:40] <Vaizki> fsphil: well they read LPs with lasers so must be your modulation :)
[15:40] <fsphil> it wasn't modulated :)
[15:40] <gonzo_> also, the detectoprs most use are photodiodes, anbd they are used with a high Z amp. So the sensor C limits the max freq
[15:40] <fsphil> well, AM modulation in the thz range I guess
[15:41] <gonzo_> I modulested AM with some music from a cd player
[15:42] <gonzo_> some people use a sub carrier at a few 10'sof khz
[15:42] <fsphil> yeah that's where I went wrong, just send it baseband. amplified the voltage out of the receiver sensor
[15:42] <gonzo_> mine is pure baseband
[15:42] <chris_99> why does using a carrier help out of interest?
[15:43] <gonzo_> some use FM or ssb on a 22/25kHz centre
[15:43] <fsphil> the lighting here is quite noisy
[15:43] <chris_99> ah
[15:43] <fsphil> monitors and things too will create noise
[15:44] <gonzo_> can't remember the whole reason, but apparentlky it gets you out of some of the noise, 50/100Hz etc
[15:44] <fsphil> I've changed to LED lighting since then, not sure what effect that will have
[15:44] <gonzo_> I have pointed mine down the road, out of the window. You can listen to all the street lights. And some quite different notes from them
[15:44] <chris_99> haha interesting
[15:45] <gonzo_> and at peopl's windows, you hane hear the tv backlight inverters
[15:45] <chris_99> what are you using for the sensor?
[15:45] <gonzo_> I have a burr borwn opto op-amp
[15:45] <fsphil> I used a bpw34
[15:45] <gonzo_> a dpi8 package cast in clear plastic with a photodiode and op amp in there
[15:46] <fsphil> and before that a small solar cell stolen from a calculator
[15:46] <chris_99> neat!
[15:46] <gonzo_> I have a pack of those too phil. Haver got around to making a mk2 rx
[15:46] <chris_99> never heard of an opto op-amp
[15:46] <gonzo_> the photodiodes are just tuiny solar cells
[15:47] <gonzo_> OPT211
[15:48] <fsphil> discontinued
[15:48] <chris_99> alas
[15:48] <gonzo_> yep they were when I built moine, but ebay had some
[15:49] <gonzo_> that with 4" lens from a desk magnified lamp, stuffed in a bit of soil pipe, excellent
[15:49] <chris_99> what do you mean by 'you hane hear the tv backlight inverters' - you mean from the flicker of light?
[15:50] <gonzo_> and some 1/2" ali box section screwed to the top, to clamp a rifle scope, for aiming
[15:50] <gonzo_> yep, some of the inverters run at a few kHz, so you hear the note from the pulsing of the backlight
[15:51] <gonzo_> interesting, CFL lamps are 50Hz though. I thought they would be hiugh freq, but they are just an electronic ballast at 50hz
[15:51] <gonzo_> my pc monitors are a nice 2kHz though
[15:51] <chris_99> aha cool
[15:52] <chris_99> http://www.cl.cam.ac.uk/~mgk25/ieee02-optical.pdf -- i thought this was very clever, using a PMT to 'decode' reflections from a CRT
[15:52] <gonzo_> the TX was a 3Wred LED and a simple current feedback regulator, with a modulate input
[15:52] <fsphil> oh that's sneaky
[15:53] <gonzo_> I had one of the old bat and ball thype TV video games in the early 8-0's
[15:54] <gonzo_> that had a pistol shooting game, where they used a photodiode to detect the raster of the TV to makesure you were pointing at the target
[15:55] <gonzo_> (actually, it was an LDR, and I remember thinging at the time, that it should not be fast enough to work that way!. What a boring little git I was as a 10yo)
[15:56] <gonzo_> I made a little light pen with a photodiode in a ball poiiunt pen, when I was at school. But that used a slow scanninmg of the screen to find the point
[15:56] <gonzo_> good old bbc micro
[15:59] <daveake> I remember doing that on my Lynx
[15:59] <daveake> 6845 video chip, iirc
[16:00] <daveake> I don't remember the details but it was really simple to do and didn't need any slow scanning
[16:00] <fsphil> I've never seen a Lynx before. cool looking machine
[16:00] <daveake> nice but slow
[16:00] <fsphil> why could nobody in the 80s get cursor keys in the right place
[16:01] <fsphil> https://en.wikipedia.org/wiki/Camputers_Lynx#/media/File:Camputers_Lynx_48k_%28white_background%29.jpg
[16:03] <fsphil> the " is in the right place though, apple still haven't fixed that
[16:07] <Vaizki> what do you mean.. my " is right there.. :)
[16:08] <Vaizki> then again for @ I have to press Alt-2
[16:09] <Laurenceb_> the elephant in the room with optical is sky brightness
[16:09] <Laurenceb_> thats why the loon optical backhaul was basically a non starter
[16:10] <Laurenceb_> during the day you need very good aiming and a large scope to get the background noise down to ok levels
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[16:19] <SpacenearUS> New position from 03URKHAB after 032 days silence - 12http://tracker.habhub.org/#!qm=All&q=URKHAB
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[16:36] <garymortimer> UBSEDS13 is going to be at the limits of APRS I would have thought shortly
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[16:36] <garymortimer> whats the best guess for seeing it again?
[16:37] <Laurenceb_> late this evening over iceland
[16:37] <garymortimer> Thanks, I shall probably wake up to it
[16:42] <SA6BSS-Mike> nah late tomorrow night over icelnad
[16:49] <fsphil> Vaizki: an apple keyboard?
[16:49] <SpacenearUS> New vehicle on the map: 03K5ARB-1 - 12http://tracker.habhub.org/#!qm=All&q=K5ARB-1
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[17:17] <Oddstr13> SM0ULC-Reb: JP52aq
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[17:28] <SM0ULC-Reb> Oddstr13: :)
[17:30] <gonzo_> I had an oric atmos in the 80's
[17:30] <gonzo_> https://en.wikipedia.org/wiki/Oric#Oric_Atmos
[17:30] <Oddstr13> SM0ULC-Reb: I wendt to bed earlier here, hehe
[17:30] <gonzo_> I liked the red/black keyboard
[17:31] <fsphil> it's very bright
[17:31] <Laurenceb_> PS-58 is back
[17:31] <fsphil> again with the cursor keys :)
[17:31] <gonzo_> and that the manual had an introcuction to mc programming, full schgematics and doc all the basdic rom routine calls
[17:31] <Laurenceb_> we need WSPR import already :P
[17:32] <gonzo_> it had no serial port, so I had to make one on vero.
[17:33] <gonzo_> but the simple term prog I wrote in basic was not fast enough
[17:33] <gonzo_> so had to learn mc progranning
[17:34] <Laurenceb_> lol these guys got trolled https://www.reddit.com/r/spacex/comments/438oho/were_rloop_the_redditoriginated_team_entering_the/
[17:35] <Laurenceb_> hyperloop is a troll, theres no other explanation
[17:37] <eroomde> what did we say about wasting time on there and nasaspaceflight and then posting here about how people don;t understand what they're talking about
[17:37] <eroomde> this is the internet, there is a bottomless pit of that
[17:37] <eroomde> there is no need to tell us here when you find more of it
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[17:41] <SM0ULC-Reb> Oddstr13: ah, cloeset I've been is Röros
[17:43] Action: LazyLeopard cues up "Someone on the Internet is Wrong" on the jukebox...
[17:43] <Oddstr13> ^^
[17:44] <Laurenceb_> LazyLeopard: I fear that argument is recursive if made on the internet
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[17:45] <LazyLeopard> ;)
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[19:06] <SpacenearUS> New position from 03WB8ELK-1 after 035 days silence - 12http://tracker.habhub.org/#!qm=All&q=WB8ELK-1
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[19:07] <Evidlo> Is it worth adding an oscillator and filter to my HAB circuit to avoid doing AFSK in software?
[19:07] <SpacenearUS> New position from 03KJ4TDM-1 after 035 days silence - 12http://tracker.habhub.org/#!qm=All&q=KJ4TDM-1
[19:10] <Geoff-G8DHE-Lap> Evidlo, You could fit a chip ... http://www.cmlmicro.com/products/MX_FX614_Bell_202_Compatible_Modem/
[19:12] <Geoff-G8DHE-Lap> not really sure why you would though!
[19:12] <Evidlo> I know that modulating is really easy to do in software
[19:12] <Evidlo> the hard part is demodulating
[19:13] <mattbrejza> do it in software
[19:13] <mattbrejza> oh you want to avoid that
[19:13] <Geoff-G8DHE-Lap> If your using APRS you don't have to decode!
[19:13] <Evidlo> I need two way comms with the balloon
[19:13] <Geoff-G8DHE-Lap> LoRa ?
[19:13] <Evidlo> So APRS is out
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[19:14] <Evidlo> I'm planning on using a 1W FM transceiver module
[19:14] <Evidlo> DRA818V
[19:14] <mattbrejza> whats wrong with one of the bell202 modem ics?
[19:15] <Evidlo> Nothing, just another part I need to buy
[19:16] <mattbrejza> 1W is overkill though
[19:16] <Geoff-G8DHE-Lap> Why not reduce the weigth and battery requirements and Helium costs and use a LoRa chip http://www.daveakerman.com/?p=1913
[19:16] <Evidlo> I've already purchased and tested the DRA818V
[19:17] <SM0ULC-Reb> Evidlo: what will you encode on afsk? ax25?
[19:18] <Geoff-G8DHE-Lap> What about designing before buying / building ?
[19:18] <Evidlo> I was going to go with ax25, but since I need two way communication I decided to just send my own data
[19:18] <SpacenearUS> New position from 03N4XWC-1 after 035 days silence - 12http://tracker.habhub.org/#!qm=All&q=N4XWC-1
[19:19] <SM0ULC-Reb> Evidlo: hu? ax25 is twoway..
[19:19] <Evidlo> Why use ax25 if you're not using aprs?
[19:19] <Evidlo> The spec looked really complicated
[19:20] <Geoff-G8DHE-Lap> maybe for a reason - reliability ?
[19:20] <SM0ULC-Reb> Evidlo: ax25 is a standard for packetencoding. i can run ax25 between my compupters heter with IP ontop at 1200 baud. no so fast though :)
[19:21] <SM0ULC-Reb> Evidlo: for example, http://www.george-smart.co.uk/wiki/AX25_Soundmodem
[19:21] <SM0ULC-Reb> Evidlo: don't get fooled by the aprs-mentioning..
[19:22] <Evidlo> What about the code on the mobile end? Isn't ax25 a lot of overhead for a little avr?
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[19:23] <SpacenearUS> New vehicle on the map: 03n4xwc_chase - 12http://tracker.habhub.org/#!qm=All&q=n4xwc_chase
[19:24] <SM0ULC-Reb> Evidlo: maybe, it's just a "L2" standard, was just sying ax25 is the transport layer
[19:25] <SM0ULC-Reb> Evidlo: or data/network is more accurate.. :)
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[19:29] <gonzo_nb> Evidlo, what country are you flying in?
[19:29] <Evidlo> US
[19:38] <SM0ULC-Reb> Evidlo: ax25 encode/decode on avr, http://garydion.com/projects/whereavr/
[19:39] <fsphil> how much data are you uplinking?
[19:40] <Evidlo> I think 1200bps should be plenty
[19:40] <Evidlo> Although I might need more later on
[19:41] <fsphil> was thinking like DTMF if you only need a few short codes
[19:44] <Evidlo> Is Bell 202 too slow or something?
[19:45] <fsphil> just thinking of keeping it easier :)
[19:45] <Geoff-G8DHE-Lap> Well if your only trying to signal say "Cut-down" then it might be overkill!
[19:46] <Evidlo> fsphil: why is that easier?
[19:48] <SM0ULC-Reb> not many bits.. :)
[19:49] <Evidlo> No, I mean how is modulating with DTMF easier than Bell 202
[19:49] <fsphil> don't have to worry about timing
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[19:50] <fsphil> and you can get radios that have keypads built in
[19:51] <fsphil> what is your receiver?
[19:52] <Evidlo> A baofeng UV-5R with micro attached
[19:56] <fl_0> daveake: redesigned voltage divider works now :)
[19:56] <fl_0> jfyi
[19:57] <fl_0> https://github.com/phl0/pits/commit/d8ddcf4f996066b82945df9ccccf07f84000d1e3
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[21:03] <SpacenearUS> New position from 03CLIFTON1 after 032 days silence - 12http://tracker.habhub.org/#!qm=All&q=CLIFTON1
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[21:04] <SpacenearUS> New position from 03PS-58 after 0311 hours silence - 12http://tracker.habhub.org/#!qm=All&q=PS-58
[21:05] <amell> So, i hear someone is about to circumnavigate on a single AA? is it true?
[21:05] <mattbrejza> yep
[21:05] <amell> goddamn. awesome.
[21:05] <Vaizki> fsphil: yes an apple keyboard.. with Finnish layout ;)
[21:06] <fsphil> oh great, just the UK one then. bah :)
[21:06] <amell> no receivers in iceland? I thought we had someone up there.
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[21:09] <amell> looking at this telemetry data, battery voltage appears to be rising, presumably due to warming. But how the hell do you get that long out of an AA?
[21:11] <mattbrejza> its only on every 4 mins
[21:11] <mattbrejza> dunno how long the gps takes toget lock
[21:11] <mattbrejza> and dunno what its idle current is
[21:11] <amell> but doesnt the gps take a while to lock?
[21:11] <mattbrejza> persumably the answer to both is not much
[21:11] <mattbrejza> if the gps is in 'sleep' or whatever its c alled then itll still have the satellite orbit data and itll know how long has passed
[21:12] <mattbrejza> i think richard said someting about the gps taking longer to get lock when the tcxo is colder
[21:12] <mattbrejza> dunno how much longer though
[21:12] <amell> ok. id be surprised if this is a ublox.
[21:12] <mattbrejza> its not
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[21:15] <Laurenceb_> yeah ublox sucks somewhat from a power use pov
[21:17] <amell> 1.5v on the telemetry. This is really 1xAA??!
[21:18] <SpacenearUS> New vehicle on the map: 03KE0GIQ-11 - 12http://tracker.habhub.org/#!qm=All&q=KE0GIQ-11
[21:18] <R34lB0rg> maybe its 1xD
[21:19] <R34lB0rg> is it "normal" for ublox to place you 70km from your location before finally loosing signal?
[21:21] <Laurenceb_> amell: yeah its 1 AA
[21:21] <amell> other question i had was difference between max7c and max8q - is there any reason why tracker code that works on max7c would not work on max8q? im not doing anything fancy. it just wont give me a position.
[21:21] <Laurenceb_> its hard to see any voltage loss so far, mental
[21:21] <amell> laurenceb_: hows the rockoon coming on?
[21:22] <Laurenceb_> I'm busy with work atm :-/
[21:22] <amell> yeah, know the feeling
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[21:25] <R34lB0rg> https://www.youtube.com/watch?v=7M0i4x0HtLs <- Dr. Who visits UNHCR
[21:25] <Laurenceb_> I got as far as getting a working spin system running using an Estes motor
[21:25] <amell> yeah, i saw the spin video on top of a ladder or something
[21:26] <Laurenceb_> cool
[21:27] <Laurenceb_> I've also got ignition working now, but I swapped from Cesaroni to Klima D motor
[21:27] <Laurenceb_> which turns out to be harder to stabilise :S
[21:27] <amell> oh. thats a surprise
[21:27] <Laurenceb_> I need to work on some better sim stuff
[21:27] <amell> why swap?
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[21:27] <Laurenceb_> smaller and lighter, more in the spirit of the original idea
[21:27] <Laurenceb_> super cheap and light, <£4 per launch
[21:28] <amell> ah, you just dont want to lose your cesaroni casing :)
[21:28] <obo4> new vehicle on the map!
[21:28] <obo4> http://aprs.fi/#!call=a%2FKE0GIQ-11&others=1&timerange=3600&tail=3600
[21:28] <Laurenceb_> heh I think I've just replace the casing with CF tube
[21:28] <obo4> several mylar balloons - we're hoping to get to east coast US
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[21:29] <amell> well, that would be a big no no on the ground, but seeing as its a few miles up im sure its fine
[21:29] <Laurenceb_> >mach 4 aerodynamic sims make my head hurt
[21:30] <Laurenceb_> I'm going to have to get back to it when I am less stressed
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[21:32] <amell> does anyone know russian? need something translating.
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[21:35] <Lunar_Lander> evening
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[22:24] <Ian_> Google Translate speaks Russian, better than no-one, although Vaiski might speak a little Russian. Finns tend to be polyglots :)
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[22:25] <Ian_> Sorry Vaizki not Vaiski
[22:26] <Ian_> Probably busy polishing recently purchased test gear at the moment though :)
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[22:36] <amell> yeah, trying to identify a 50s rocket from a picture, its got cyrillic on the side.
[22:37] <amell> and i cant type cyrillic into google translate :)
[22:42] <R34lB0rg> amell, try to transliterate https://en.wikipedia.org/wiki/Russian_alphabet
[22:43] <lz1dev> amell: throw it at google image search
[22:44] <amell> lz1dev: tried that one too :) no luck
[22:44] <R34lB0rg> amell, where is the pic?
[22:44] <amell> ill put it on imgur
[22:45] <R34lB0rg> i'm listening to tchaikovsky right now, i'm in the mood for a bit russian ;)
[22:55] <Vaizki> Ian, I am arranging bits & bobs and throwing stuff away... lab corner looks a mess right now :). http://imgur.com/a/c76Sw
[22:56] <Vaizki> and I dont do russia. sorry
[22:57] <amell> http://imgur.com/a/hw2JX
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[22:58] <Vaizki> I found a grocery bag full of various molex connectors but I seem to have only one gender and no pins for them...
[22:58] <amell> annoying the heck out of me, cant ID it.
[22:58] <Vaizki> amell, your lab corner looks more interesting!
[22:58] <amell> im guessing its a SAM or AGM, 50s maybe early 60s.
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[23:02] <Vaizki> I dont think its a sam
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[23:04] <amell> the bracket above the bell seems to indicate its launched from something else.
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[23:12] <Vaizki> or maybe it's a JATO type thing
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[23:12] <amell> hmm. seems a bit heavy
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[23:23] <R34lB0rg> ">B<5B:0 A=0@O65=85" means "marker equipment"
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[23:25] <amell> thanks hmm
[23:29] <R34lB0rg> "70@O4" means "charge"
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[00:00] --- Sun Jan 31 2016