highaltitude.log.20160213

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[02:35] <bvjf> zuitz
[02:35] <bvjf> jkoi
[02:35] <bvjf> k
[02:35] <bvjf> hi
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[08:57] <GTO> Any news on UON1?
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[09:21] <MikeUoN> Hi everyone, it looks like the NOTAM hasn't come through in time for Uon1 today, therefore the launch is called off.
[09:21] <MikeUoN> Sorry about that.
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[09:29] <SpeedEvil> :/
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[09:37] <garymortimer> Morning all, the Nottingham balloon still going??
[09:40] <AndyEsser> garymortimer: if that's UON1, then no
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[09:43] <SpeedEvil> 09:21] <MikeUoN> Hi everyone, it looks like the NOTAM hasn't come through in time for Uon1 today, therefore the launch is called off.
[09:43] <SpeedEvil> 09:21] <MikeUoN> Sorry about that.
[09:44] <garymortimer> Oh dear, sorry about that
[09:44] <garymortimer> next question....
[09:45] <garymortimer> rfm98s LoRa can they be configured to just send an address or name value without an arduino attached??
[09:46] <jcoxon> they need a micro unfortunately
[09:46] <garymortimer> thought so just checking
[09:47] <garymortimer> arduino project on single chip
[09:47] <garymortimer> blast that was for googlw
[09:47] <garymortimer> e
[09:47] <garymortimer> !
[09:47] <garymortimer> but thats what you could do I think
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[09:48] <jcoxon> garymortimer, there are lora+micro chips out there i think
[09:48] <jcoxon> in one package
[09:48] <garymortimer> One of them is the rn2483 I think
[09:55] <garymortimer> Are there any simple ish tracking from time of reception projects out there?? Trying to get a non gps tracker down around 2g if I can
[09:56] <SpeedEvil> Laurenceb at least is interested in this, me too.
[09:56] <SpeedEvil> I don't think anyone has actually done this.
[09:57] <SpeedEvil> The 'simple' solution at the moment would be one transmitter in-band transmitting its position with GPS.
[09:57] <SpeedEvil> And then you pick up in-band at teh same time one or more beacon transmitters
[09:58] <SpeedEvil> Using the GPS transmitter as a clock to keep the receivers synced.
[09:58] <SpeedEvil> this would require little extra hardware
[09:58] <SpeedEvil> Just collecting the audio signals from more than two recievers.
[09:59] <SpeedEvil> To do it 'right' you need decent clocks at the recievers.
[10:00] <garymortimer> I guess you have to knwo exactly when the transmission was sent so either via clock on the board or its own power hungry gps!
[10:00] <R34lB0rg> 1ms accuracy = 299792m precision
[10:01] <garymortimer> humm
[10:01] <R34lB0rg> garymortimer, you would only need a beacon sending a short signal
[10:02] <R34lB0rg> you could even boost the sensitivity by using the same pseudorandom code as in gps
[10:02] <garymortimer> I have successfully mapped RSS when driving around using an SDR and it worked very well but of course we were moving. Yeah but the GPS is teh limiting factor as these is for potentially small fish
[10:02] <garymortimer> Almost thinking just rfid readers
[10:02] <R34lB0rg> but you need at least 3 receiving station with precise clock synchronization
[10:03] <garymortimer> yeah, would have many stations that would not be an issue
[10:04] <R34lB0rg> I wonder how they do clock sync at ligo
[10:04] <SpeedEvil> you need two recievers if you are tracking phase, and know where the launch is
[10:04] <SpeedEvil> (and don't care about height)
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[10:05] <garymortimer> These look teh job https://en.wikipedia.org/wiki/Acoustic_tag
[10:06] <SpeedEvil> garymortimer: how up for adventures in positioning are you?
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[10:07] <SpeedEvil> oh
[10:07] <SpeedEvil> bugger
[10:08] <SpeedEvil> https://en.wikipedia.org/wiki/Loran-C#United_Kingdom_eLORAN_implementation
[10:08] <SpeedEvil> Despite these plans, in light of the decision by France and Norway to cease Loran transmissions on 31 December 2015, the UK announced at the start of that month that its eLoran service would be discontinued on the same day.[46]
[10:08] <SpeedEvil> Nooooooooooooooooooooooo
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[10:10] <R34lB0rg> LIGO has a paper about their time sync solution: https://dcc.ligo.org/public/0027/T070218/000/T070218-00.pdf
[10:10] <garymortimer> Wow I did'nt know anyone still used Loran
[10:11] <SpeedEvil> garymortimer: yeah
[10:11] <SpeedEvil> garymortimer: it (was) in principle an interesting solution for HAB
[10:11] <garymortimer> It was all the rage back in the day
[10:11] <R34lB0rg> i don't think loran was actually "used" lately
[10:11] <SpeedEvil> As it was squarely in the low-power DIY SDR range
[10:12] <garymortimer> OIC!
[10:18] <Darkside> older vaisala sondes used to use it iirc
[10:18] <Darkside> RS80s or something
[10:18] <Darkside> they'd receive the lora signal, and modulate it on the WFM downlink
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[10:21] <R34lB0rg> garymortimer, inertial navigation is not an option?
[10:28] <SpeedEvil> R34lB0rg: no
[10:28] <SpeedEvil> R34lB0rg: MEMs accellerometers have errors - very optimistically - in the 1cm/s^2 range.
[10:28] <SpeedEvil> This means that after 10 minutes, you're 6m/s out, and 2km
[10:30] <R34lB0rg> I played around with MEMS and it looks like they suffer from 1) constant drift 2) temperature dependency 3) different sensitivity in xyz axis
[10:31] <R34lB0rg> but these can be corrected in software and early rocket and plane navigation systems worked fine on that principle
[10:31] <SpeedEvil> that's all unimportant
[10:31] <SpeedEvil> that can all be calibrated out
[10:31] <SpeedEvil> the problem you can't get away from is the noise
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[10:37] <PE2BZ> !flights
[10:37] <SpacenearUS> 03PE2BZ: Current flights: 03UON1 10(3cc3), 03UON1b 10(1be6)
[10:37] <PE2BZ> !dial UON1
[10:37] <SpacenearUS> 03PE2BZ: Latest dials for 03UON1 10(3cc3): none
[10:37] <PE2BZ> Good morning everyone !
[10:38] <DL1SGP> heel goeden dag PE2BZ
[10:38] <DL1SGP> UON1 has been canceled due to lack of NOTAM
[10:46] <PE2BZ> Thanks Felix ! Than I go back to my L-band antenna experiment ;-)
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[10:54] <DL1SGP> heh keep me posted on that one PE2BZ :)
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[14:13] <LunarMobile> Hello
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[14:24] <LunarMobile> GPS error is not nice
[14:24] <SpacenearUS> New vehicle on the map: 03hr_v_chase - 12http://tracker.habhub.org/#!qm=All&q=hr_v_chase
[14:26] <craag> Yo LunarMobile
[14:26] <craag> How are you?
[14:26] <LunarMobile> Quite good thanks and you?
[14:26] <craag> Good :)
[14:26] <craag> How's the data looking?
[14:27] <LunarMobile> Yay
[14:27] <LunarMobile> Eugen sent me the log earlier but am on train home now
[14:28] <LunarMobile> Excited to check it out
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[14:29] <LunarMobile> Video extends to about 15 min post burst
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[14:35] <Ben-AstroSoc> were you using a gopro?
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[14:36] <LunarMobile> Yes gopro hero
[14:37] <LunarMobile> The simple one
[14:38] <craag> Looking forward to seeing it LunarMobile
[14:38] <LunarMobile> Yea :)
[14:39] <LunarMobile> Hope to be able to show something later
[14:39] <LunarMobile> Like not too far in the future
[14:39] <Ben-AstroSoc> one of the guys on teh team cycles semi-professionally so we're stealing one of his gopros for ours :)
[14:40] <LunarMobile> :)
[14:40] <LunarMobile> I was told on landing that the people in celle usually use a battery pack with their gopro
[14:40] <Ben-AstroSoc> yeah there's an extension thing for the case
[14:41] <Ben-AstroSoc> we were going to build a mount to try and take panoramas so idk if we can fir it
[14:41] <Ben-AstroSoc> fit*
[14:41] <Ben-AstroSoc> cos we're using the body of an fpv wing so there's a nice big dome at the bottom of our hab
[14:41] <LunarMobile> Yea
[14:44] <LunarMobile> Physics just works :)
[14:44] <LunarMobile> A cent dropped onto the train floor
[14:45] <LunarMobile> Just reached down with my phone to let the case magnet lift it up :)
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[14:53] <LunarMobile> Now's not the time to cry, now's the time to find out why!
[14:58] <SpacenearUS> New vehicle on the map: 03KD0HIP-7 - 12http://tracker.habhub.org/#!qm=All&q=KD0HIP-7
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[15:22] <SpacenearUS> New vehicle on the map: 03KD5GOM-11 - 12http://tracker.habhub.org/#!qm=All&q=KD5GOM-11
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[15:36] <SpacenearUS> New vehicle on the map: 03W5LCY-7 - 12http://tracker.habhub.org/#!qm=All&q=W5LCY-7
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[16:40] <SpacenearUS> New vehicle on the map: 03SP9UOB-12 - 12http://tracker.habhub.org/#!qm=All&q=SP9UOB-12
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[17:30] <SpacenearUS> New position from 03KF7RCV-11 after 03a day silence - 12http://tracker.habhub.org/#!qm=All&q=KF7RCV-11
[17:52] <Lunar_Lander> scrolling through the log of F2
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[18:23] <SP9UOB-Tom> /msg NickServ identify asdqwe
[18:23] <SP9UOB-Tom> oops ;-)
[18:24] <db_G6GZH> hey, how did you know my password? 8-)
[18:25] <SP9UOB-Tom> db_G6GZH: hahahahhaa :-)
[18:25] <SP9UOB-Tom> /msg NickServ help commands
[18:26] Last message repeated 1 time(s).
[18:26] <SP9UOB-Tom> stupid commandline client ;)
[18:26] <db_G6GZH> I only recently upgraded it from qwerty
[18:26] <SP9UOB-Tom> 123qwe also does the job ;-)
[18:27] <db_G6GZH> I'll use that next time, thanks for the tip.
[18:27] <SP9UOB-Tom> db_G6GZH: np
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[18:58] <R34lB0rg> Lunar_Lander, i'm looking forward to your video
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[19:02] <Brian> hello world!
[19:02] Nick change: Brian -> Guest72337
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[19:08] <SpacenearUS> New position from 03WB8ELK-1 after 037 days silence - 12http://tracker.habhub.org/#!qm=All&q=WB8ELK-1
[19:09] <SpacenearUS> New position from 03KJ4TDM-1 after 037 days silence - 12http://tracker.habhub.org/#!qm=All&q=KJ4TDM-1
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[19:10] <Guest72337> hey!
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[19:17] <Lunar_Lander> R34lB0rg, thanks :)
[19:18] <Lunar_Lander> hoping to put something out in the not too distant future
[19:19] <SpacenearUS> New vehicle on the map: 03N4XWC-1 - 12http://tracker.habhub.org/#!qm=All&q=N4XWC-1
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[19:26] <SpacenearUS> New vehicle on the map: 03N4XWC-1 - 12http://tracker.habhub.org/#!qm=All&q=N4XWC-1
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[19:41] <SpacenearUS> New vehicle on the map: 03N4XWC-1 - 12http://tracker.habhub.org/#!qm=All&q=N4XWC-1
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[20:11] <SpacenearUS> New vehicle on the map: 03N4XWC-1 - 12http://tracker.habhub.org/#!qm=All&q=N4XWC-1
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[20:15] <SpacenearUS> New vehicle on the map: 03N4XWC-1 - 12http://tracker.habhub.org/#!qm=All&q=N4XWC-1
[20:21] <mfa298> hmmm, has the bot seen some glitch in the matrix.
[20:21] <lz1dev> its an old bug
[20:21] <lz1dev> not sure whats causing it
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[20:23] <chris_99> this sounds interesting - http://ucrtoday.ucr.edu/34932 'GPS Tracking Down to the Centimeter'
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[20:27] <chris_99> ah, at first i thought you could use their technique with GPS+IMU, but it looks like you do need DGPS
[20:28] <cm13g09> mfa298: ping
[20:31] <SpacenearUS> New vehicle on the map: 03N4XWC-1 - 12http://tracker.habhub.org/#!qm=All&q=N4XWC-1
[20:33] Last message repeated 1 time(s).
[20:33] <mfa298> cm13g09: pong
[20:34] <cm13g09> mfa298: PM
[20:39] <Geoff-G8DHE_> Does anyone have a link to theHAB photo with a jet passing by ?
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[20:40] <Upu> which one
[20:40] <Upu> https://dl.dropboxusercontent.com/u/63720513/Images/Planes/5a1706180e74753d.png
[20:40] <Upu> https://dl.dropboxusercontent.com/u/63720513/Images/Planes/iG9flXwN4oY0E.JPG
[20:40] <Upu> https://dl.dropboxusercontent.com/u/63720513/Images/Planes/vlcsnap-2012-07-16-20h10m50s44.png
[20:40] <Upu> https://dl.dropboxusercontent.com/u/63720513/Images/Planes/vlcsnap-2015-09-11-16h02m51s812.png
[20:41] <Geoff-G8DHE_> Oh right didn't clock there were so many!
[20:41] <Geoff-G8DHE_> Tks UPU
[20:41] <jarod> last one :O
[20:41] <chris_99> cool :)
[20:41] <Upu> https://dl.dropboxusercontent.com/u/63720513/Images/Planes/close_shave.mpg
[20:41] <chris_99> whats the thing attached to a rod in vlcsnap-2015-09-11-16h02m51s812.png
[20:41] <Upu> dunno
[20:42] <Upu> tbh having just looked at that its not the one I thought it was
[20:42] <Upu> unsure where I got that one
[20:42] <arko> gives you a good idea of how fast planes travel
[20:42] <Upu> possibly shouldn't have shared that
[20:42] <Upu> don't spread that video one pls
[20:42] <arko> narp
[20:42] <Geoff-G8DHE_> Nope OK
[20:42] <Upu> thought it was mine
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[20:43] <Lunar_Lander> thanks for the object movie again Geoff-G8DHE_ :)
[20:43] <arko> i remember reading the FAA rules, and technically, HABs have right of way
[20:44] <Geoff-G8DHE_> No problems, its semi-automated now!
[20:46] <Lunar_Lander> nice
[20:46] <Lunar_Lander> GPS lock dropout is really irritatnig
[20:51] <SpacenearUS> New vehicle on the map: 03AE0SS-13 - 12http://tracker.habhub.org/#!qm=All&q=AE0SS-13
[20:51] <SpacenearUS> New vehicle on the map: 03KE0BMV-11 - 12http://tracker.habhub.org/#!qm=All&q=KE0BMV-11
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[20:54] <SpacenearUS> New vehicle on the map: 03N4XWC-1 - 12http://tracker.habhub.org/#!qm=All&q=N4XWC-1
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[20:59] <Lunar_Lander> light sensors stopped working at 7 km
[20:59] <Lunar_Lander> just flatline, nothing
[20:59] <Lunar_Lander> came back at 3 km during descent
[21:04] <mattbrejza> what else was on there?
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[21:06] <nick_> Lunar_Lander: did they get too cold or something?
[21:06] <nick_> What sensors were they?
[21:06] <Lunar_Lander> good question or condensation in there
[21:06] <Lunar_Lander> VTB8840BH from excelitas
[21:07] <Lunar_Lander> one moment
[21:08] <Lunar_Lander> they were on their own board with an attiny841 that collected the voltages from the amplifiers and https://www.pololu.com/product/2468 this one
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[21:10] <Lunar_Lander> http://s.gullipics.com/image/j/9/0/5yv6n4-l5znyv-t4rh/PayloadBox.jpeg
[21:10] <Lunar_Lander> the copper one on top, it broke off from the fan platform
[21:12] <Lunar_Lander> don't have the circuit handy, will look for it in a moment
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[21:36] <Lunar_Lander> http://s.gullipics.com/image/2/l/6/5yv6n4-l5zo5q-1ckf/HarrisonRadiometer.png
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[21:51] <Lunar_Lander> there is one thing we could have done
[21:51] <Lunar_Lander> monitor the A23 12V battery we used
[22:03] <Lunar_Lander> Ian_, are you there?
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[22:10] <Ian_> Here Lunar_Lander
[22:10] <Lunar_Lander> I recalled something
[22:10] <Ian_> ping Lunar_Lander
[22:11] <Ian_> Ah, what did you recall?
[22:11] <Lunar_Lander> eugen actually wrapped the batteries with clear tape and then tacked the pack to the wall with double-sided tape
[22:11] <Lunar_Lander> when you look at the picture zoomed, you can see it http://s.gullipics.com/image/j/9/0/5yv6n4-l5znyv-t4rh/PayloadBox.jpeg
[22:12] <Ian_> That's good. It is always best to not tempt fate when the burst happens or even on launch. Glad that it went well. I bet you are dead chuffed!
[22:14] <Lunar_Lander> yea :)
[22:14] <Ian_> Do I understand that the cutdown worked, but still gave a software error status.
[22:15] <Lunar_Lander> it also seems to have work physically
[22:15] <Lunar_Lander> worked
[22:15] <Lunar_Lander> like the loop was out of the servo lock and the other end was scorched and cut at the wire coil
[22:15] <Lunar_Lander> I assume something then was stuck
[22:15] <Ian_> Ah, I see.
[22:16] <Lunar_Lander> yeah
[22:16] <Lunar_Lander> have to look at the things once more again
[22:18] <Ian_> I guess that the cutdown path needs to be well clear and as simple as possible to prevent that.
[22:18] <Lunar_Lander> I agree
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[22:20] <SpacenearUS> New vehicle on the map: 039w2bws_chase - 12http://tracker.habhub.org/#!qm=All&q=9w2bws_chase
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[00:00] --- Sun Feb 14 2016