highaltitude.log.20180202

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[00:19] <SpacenearUS> New position from 03HORUS after 035 days silence - 12https://tracker.habhub.org/#!qm=All&q=HORUS
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[00:45] <SpacenearUS> New vehicle on the map: 03CT5IPX_chase - 12https://tracker.habhub.org/#!qm=All&q=CT5IPX_chase
[01:00] <SpacenearUS> New vehicle on the map: 03N1730344 - 12https://tracker.habhub.org/#!qm=All&q=N1730344
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[05:33] <SpacenearUS> New position from 03U3S21 after 0314 hours silence - 12https://tracker.habhub.org/#!qm=All&q=U3S21
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[05:36] <SpacenearUS> New vehicle on the map: 031234_chase - 12https://tracker.habhub.org/#!qm=All&q=1234_chase
[05:37] <SpacenearUS> New vehicle on the map: 03Rouse_chase - 12https://tracker.habhub.org/#!qm=All&q=Rouse_chase
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[05:40] <SpacenearUS> New position from 03HORUSLORA1 after 03a day silence - 12https://tracker.habhub.org/#!qm=All&q=HORUSLORA1
[05:50] <SpacenearUS> New vehicle on the map: 03N1710207 - 12https://tracker.habhub.org/#!qm=All&q=N1710207
[06:00] <SpacenearUS> New position from 03icarusIV after 037 hours silence - 12https://tracker.habhub.org/#!qm=All&q=icarusIV
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[07:03] <SpacenearUS> New position from 03LU1ESY-3 after 0316 hours silence - 12https://tracker.habhub.org/#!qm=All&q=LU1ESY-3
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[07:14] <SpacenearUS> New position from 03M2033542 after 035 days silence - 12https://tracker.habhub.org/#!qm=All&q=M2033542
[07:18] <Darkside> >_>
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[07:55] <SpacenearUS> New position from 03HORUS after 037 hours silence - 12https://tracker.habhub.org/#!qm=All&q=HORUS
[07:58] <Darkside> sorry about the spam...
[07:58] <Darkside> testing a bunch of payloads...
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[08:11] <qyx> hi there, anyone investigated those IoT cubesats?
[08:12] <qyx> I was browsing some sat databases and found several for "IoT/IoM connectivity and M2M applications"
[08:12] <qyx> also there are more planned to be launched this year
[08:12] <Darkside> are any of them actrually working?
[08:12] <Darkside> i know of a few startups doing that kind of stuff, but none of them have anything much to show for it yet
[08:15] <qyx> idk, I didn't find anything mature
[08:15] <qyx> nor any service plan to purchase
[08:16] <qyx> there is one UK company afaik, they have 3 or so sats on the orbit providing testing services for their investors
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[08:54] <_Jordan> GM guys
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[10:52] <SpacenearUS> New vehicle on the map: 03SHSSP1 - 12https://tracker.habhub.org/#!qm=All&q=SHSSP1
[10:53] <Darkside> well that was a fun bog
[10:53] <Darkside> bug
[10:53] <Darkside> a bug that only happens if the camera takes an image of black
[10:53] <Darkside> and of course one alwyas has the camera completely covered when attempting to test an image payload...
[11:03] <daveake> nice :)
[11:03] <fsphil> too few packets? :)
[11:03] <Darkside> the SSDV encoder bombs out
[11:04] <Darkside> thankfully i already had code written to detect that (return code is not 0)
[11:04] <Darkside> its just i wasnt acting on that returned data properly
[11:04] <fsphil> it shouldn't die
[11:04] <Darkside> >_>
[11:05] <Darkside> crap i dont have the test image anymore
[11:05] <daveake> Sounds easy to make one ....
[11:05] <Darkside> yeah it means getting the payload back out of its box again
[11:05] <Darkside> and on the wifi
[11:05] <Darkside> and im in the middle of writing some code to check the IMU log file output
[11:17] <SpacenearUS> New vehicle on the map: 03MMU - 12https://tracker.habhub.org/#!qm=All&q=MMU
[11:17] <SpacenearUS> New position from 03BRUCE after 0317 hours silence - 12https://tracker.habhub.org/#!qm=All&q=BRUCE
[11:18] <Darkside> BRUCE
[11:18] <Darkside> oh wait thats bruce mccandless, not anything australian
[11:18] <Darkside> boo
[11:18] <daveake> lol sorry :)
[11:18] <SpacenearUS> New vehicle on the map: 03M2353057 - 12https://tracker.habhub.org/#!qm=All&q=M2353057
[11:19] <daveake> s/MMU/SHEILA/
[11:19] <Darkside> here come the sondes!
[11:22] <Darkside> well
[11:22] <Darkside> that was underwhelming
[11:23] <daveake> It#s the sonde of silence
[11:23] <Darkside> facepalm
[11:26] <vaizki> flight of le ballon-sonde no good?
[11:31] <SpacenearUS> New vehicle on the map: 03M4413479 - 12https://tracker.habhub.org/#!qm=All&q=M4413479
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[11:44] <fsphil> not so many midday lanuches here
[11:45] <daveake> mmm lunch
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[11:52] <SpacenearUS> New vehicle on the map: 03N4620541 - 12https://tracker.habhub.org/#!qm=All&q=N4620541
[11:57] <fsphil> good thinking
[12:05] <Darkside> almost bedtime here
[12:05] <Darkside> just playing with the predictions
[12:05] <Darkside> http://rfhead.net/horus/nextlaunch/nextlaunch_gfs20180202-06z.kml
[12:05] <Darkside> theres our 'prediction grid' for sunday
[12:07] <Darkside> more like a prediction parallelogram but anyway..
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[12:21] <Laurenceb> !whereis HIRFW-6
[12:21] <SpacenearUS> 03Laurenceb: 03HIRFW-6 was over 03Division No. 18, SK, Canada 10(54.48107,-107.03785) at 0311999 meters about 0313 hours ago
[12:25] <SpacenearUS> New position from 03IV3SRD-11 after 0310 hours silence - 12https://tracker.habhub.org/#!qm=All&q=IV3SRD-11
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[12:32] <Laurenceb> https://www.researchgate.net/publication/322530755_Analysis_and_Qualitative_Effects_of_Large_Breasts_on_Aerodynamic_Performance_and_Wake_of_a_Miss_Kobayashi%27s_Dragon_Maid_Character?channel=doi&linkId=5a5ef35a458515c03ee11245&showFulltext=true
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[13:38] <Ian_> Finally some research to get excited about Laurenceb :) Soon it will be so very un-PC.
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[13:40] <SpacenearUS> New vehicle on the map: 03EVA - 12https://tracker.habhub.org/#!qm=All&q=EVA
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[14:15] <SpacenearUS> New position from 03HIRF-6 after 0315 hours silence - 12https://tracker.habhub.org/#!qm=All&q=HIRF-6
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[15:36] <arjunnaha> daveake: how are you streaming to YouTube from the Pi, are you using the avconv lib?
[15:36] <daveake> ffmpeg
[15:38] <arjunnaha> Great, thanks
[15:40] <craag> We're migrating to the new batc streamer on the 7th, else I'd offer you an rtmp stream :)
[15:40] <craag> well old one will be running on for a while actually
[15:43] <daveake> heh
[15:43] <daveake> My membership lapsed ... need to sort that
[15:45] <craag> give it a week or so... guys are currently migrating the member database.
[15:47] <SpacenearUS> New position from 03HIRFW-6 after 0317 hours silence - 12https://tracker.habhub.org/#!qm=All&q=HIRFW-6
[15:47] Action: fsphil imagines it being moved by horse and cart
[15:47] <arjunnaha> What language are you using to set ffmpeg up?
[15:48] <craag> close. sql->excel-mangling->sql.
[15:48] <daveake> You can just run it from the shell
[15:48] <fsphil> haha, oh dear
[15:48] <fsphil> well as long as it works I suppose
[15:48] <daveake> In this case it's Python that decides if 3G is connected
[15:48] <craag> old system makes some erm *interesting* use of columns
[15:48] <arjunnaha> Ah great
[15:48] <daveake> and checks the altitude to see if 3G should be connected or not
[15:49] <arjunnaha> Was looking to do something similar to yours checking the altitude
[15:49] <arjunnaha> I assume you can get the altitude from PITS somehow?
[15:49] <daveake> Yeah you can set it to open a named pipe
[15:50] <daveake> Then listen to that from Python or whatever
[15:50] <arjunnaha> Ill have a look at that now!
[15:51] <daveake> So for this flight I have:
[15:51] <daveake> pipe_payload=STS41B
[15:51] <daveake> Then PITS builds a UKHAS string for that payload ID
[15:51] <daveake> sends it to the pipe
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[15:52] <arjunnaha> So, are all of the 3G things running on Python?
[15:53] <arjunnaha> If so, otherwise I need to learn C!
[15:53] <daveake> Yes
[15:53] <daveake> Here's a script that listens to the pipe, and pokes the telemetry into habhub:
[15:53] <daveake> https://github.com/PiInTheSky/pits/blob/master/tracker/habitat.py
[15:53] <arjunnaha> Is that file dormant in normal use of PITS?
[15:54] <daveake> yup
[15:54] <daveake> Commented out in startup script
[15:54] <arjunnaha> Nice, I'll get to work building that Python script
[15:55] <arjunnaha> Is there too much detriment (power wise) in having a 3G modem, and a Canon connected?
[15:56] <daveake> Well I use 4AAs there's plenty of capacity left
[15:57] <arjunnaha> Yeh, I think with our last flight, it kept transmitting until the next morning
[15:57] <daveake> modem shouldn't be using much when disconnected - I don't try to connect unless below 2000m anyway
[15:57] <daveake> yeah it's 20+ hours normally
[15:57] <arjunnaha> Will have to try and build a payload where the GoPro's won't overheat this time!
[15:59] <arjunnaha> https://www.amazon.co.uk/Huawei-Unlocked-Portable-Dongle-Genuine/dp/B01DML8GOK/ - will this do? Out of interest, which modem are you using? (sorry for so many questions!)
[16:00] <Ian_> I guess that your ffmpeg command lines evolve during various developments. Defo not a trivial endeavour :) Very powerful as the video Swiss Army Knife though. What with Imagemagick also in your toolbox it's an excellent strategy.
[16:01] <daveake> Evolve? More like "woo it works at last that'll do" :)
[16:05] <Ian_> Not simple and good to have examples to start from I guess. Developing your own book of cribs that work. I've used it a few times, but never really in earnest, just single tasks either needed or being inquisitive.
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[16:10] <gb73d> [16:08] <gb73d> 130.167 NFM Ru talk hrd last pass
[16:10] <gb73d> [16:09] <gb73d> EVA
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[18:03] <gb73d> iss uk oh pass coming up in <5 mins approx
[18:04] <rawles> my uncle was asking about that. Assuming you time it right, what is the standard impress-your-uncle thing to do?
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[18:06] <rawles> (the ISS)
[18:19] <gb73d> [18:18] <gb73d> yes im rec the freq
[18:19] <gb73d> [18:19] <gb73d> just watched it going over head
[18:20] <gb73d> next pass will be good too
[18:22] <Alex_> how long is it between passes?
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[18:33] <gb73d> 90mins
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[18:52] <Alex_> what sort of a dB difference is the HABAmp meant to make?
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[19:14] <gb73d> next iss pass 10-15 mins
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[19:43] <gb73d> ANOTHER ISS UK OVERHEAD PASS IN <5 MINS APPROX.
[19:50] <gb73d> 130.167 FADING up
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[20:30] <PE2BZ> Alex the habamp I use at work (400 - 406 MHz version) does about 18 dB gain.
[20:32] <PE2BZ> I do use however a separate bandpassfilter on the input of the habamp also, because of the antenna height (27 m asl) and the fact that my Receiver antenna is less than 200 m away from police tetra (390 MHz) and commercial tetra (428 MHz) and paging (169 MHz with around 1 kW power)
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[20:45] <Alex_> Hmm my HABAmp doesn't seem to be doing anything like that (2/3dB if that - its hard to tell if theres a substantial increase with the fluctuation)
[20:45] <Alex_> Is it something that only really makes a difference when the PITS is far away? Or should you still see a big difference when it is close by?
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[20:53] <Alex_> PE2BZ?
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[21:11] Nick change: Steffann -> Steffanx
[21:11] <fsphil> Darkside: wenet has FEC now? I think I missed that or did it always have it?
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[21:30] <Alex_> Hi I'm trying to set up the payload document for my PITS but from the logtail it appears that the error is that my PITS is sending 11 fields when the document is expecting 9
[21:30] <Alex_> I 'set up the PITS payload document from an existing document' and I used the most recent PISKY (9) template
[21:30] <Alex_> What are the 2 extra fields I should add to my payload document/should I just make a new one?
[21:31] <Alex_> An example update from my PITS is $$AGSBHAB,626,21:31:04,13.37951,-2.32752,00017,0,0,12,24.5,1.1,0.137"56A0
[21:31] <fsphil> does the manual say what the fields are?
[21:32] <Alex_> In the manual it just says use the 'template at the bottom' which seems to mean the most recent PITS template
[21:32] <Alex_> although in the guide screenshot the most recent one is from 2014
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[21:46] <Alex_> What sort of value would 0.137*B9FF represent?
[21:46] <Alex_> the end field of my PITS sentences..
[21:48] <Oddstr13> the *XXXX would be the checksum
[21:49] <Alex_> oh ok so I'm only trying to figure out what the 0.137 is
[21:49] <Oddstr13> yep
[21:49] <Alex_> its goes up from 0.134 to 0.137 and down again
[21:50] <Alex_> possibly pressure, more likely than external temperature
[21:50] <Alex_> although i'm not sure if the PITS or raspberry has a built in pressure sensor
[21:51] <Oddstr13> I don't have a clue of what it is to be honest - I recognize the timestamp and lat,lon, but that's it
[21:51] <Alex_> actually i'm guessing for testing purposes it doesnt really matter, so long as I input that it is a float
[21:51] <Alex_> anyway lets see I guess
[21:53] <SpacenearUS> New vehicle on the map: 03AGSBHAB - 12https://tracker.habhub.org/#!qm=All&q=AGSBHAB
[21:56] <Alex_> looks like it worked
[22:01] <Alex_> does anyone know how to remove it from the habhub tracker now or is that not possible?
[22:03] <Oddstr13> https://github.com/PiInTheSky/pits/blob/8d6dde8bfdbbb92f240b363786946a18353c5edd/tracker/misc.c#L783
[22:05] <Oddstr13> looks like it might be current
[22:05] <Oddstr13> not sure why voltage would read 1.1 tho
[22:07] <Alex_> actually except for that one line, the voltage seems to read 5.1V (and gradually decreasing as batteries run out)
[22:07] <Alex_> but yes current makes a lot of sense
[22:08] <Alex_> thanks
[22:08] <Oddstr13> I'm guessing unit is amps then :P
[22:08] <Alex_> yeah
[22:08] <Alex_> do you know about removing the payload from habitat?
[22:09] <Oddstr13> no clue
[22:09] <Oddstr13> I guess it just stops displaying on the map without data for some while?
[22:11] <Oddstr13> otherwise there's #habhub, which is the channel for getting payloads approved
[22:14] <daveake> This might help http://www.pi-in-the-sky.com/index.php?id=getting-on-the-map
[22:15] <daveake> You can change the voltage multiplier to make that accurate
[22:15] <daveake> I shall now mutter under my breath about the resistor values changing between batches ...
[22:18] <Alex_> Cheers
[22:19] <Alex_> Also do you know how the predicted 'path' on habitat is produced. I haven't input any data about ascent/descent rate or burst height anywhere so why is it predicting the payload will land in Cambridge?
[22:20] <daveake> ignore it
[22:20] <daveake> Until you launch and it measures the ascent rate, it's not useful
[22:21] <Ian_> I understand that a lot of test data is recognised as such and disappears from the map after around 24 hours.
[22:21] <daveake> I believe it assumes 30km burst but that can be changed by an admin. It also assumes 5m/s landing speed but it will update that during descent.
[22:23] <Alex_> Ah ok wow so its dynamic and updates on the fly thats pretty cool
[22:24] <Ian_> The Pisky manual is quite fantastic too, recommended reading :)
[22:25] <Alex_> yeah i've just finished reading it
[22:25] <Ian_> Was it the butler?
[22:25] <Alex_> it was very good except I had some troubles with setting up dl-fldigi which are now fine, and just this issue with it not listing the default fields in the sentence
[22:25] <Alex_> The butler?
[22:26] <Ian_> Yeah, traditionally, the butler did it!
[22:27] <Alex_> ah yep
[22:27] <daveake> It's not a whodunnit it's a whereissit
[22:31] <Alex_> do you guys know what sort of a dB gain the HABAmp should provide close range?
[22:31] <Alex_> because at the moment the PITS is only a few metres away, but the HABAmp seems to make no difference when i turn power on/off to it
[22:31] <Ian_> Close range it is likely to overload the rx
[22:32] <daveake> this ^
[22:33] <Alex_> how will you know if its overloaded, with my HABAmp on the SDR console says '-57dBm' is that a lot? I have no experience
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[22:50] <Alex_> Also wouldnt the HAB only overload the rx when it is supplied with power?
[22:50] <Alex_> The power seems to make no difference to mine, could it be broken?
[22:55] <Ian_> Some things have obviously been assumed, like it was powered. With no power, then it has 'insertion loss', not gain.
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[22:56] <Ian_> So it's likely to attenuate to a greater or lesser degree. Doubtless the band pass filter will still be operative - if it's passive; as assumed.
[22:57] <daveake> You should check that it's set to be powered the same way that you're powering it. i.e. external socket vs bias-t
[22:57] <Alex_> ok could you guys please define what 'insertion loss' and 'bias-t' mean?
[22:58] <Ian_> If you stack a lot of coaxial adaptors together, each pair represent an insertion loss of around 0.5dB. Does that put the phrase into context?
[23:00] <Ian_> Bias T https://en.wikipedia.org/wiki/Bias_tee
[23:04] <Ian_> See at [12:57] bias-t http://habhub.org/zeusbot/logs/highaltitude.log.20160326
[23:05] <Ian_> Having successfully tested without the Habamp, then remove the signal to a distance where it becomes very weak, then connect the Habamp and power it correctly to check the results.
[23:06] <Mike-SA6BSS> bias-t = you insert power into the coax from your radio to power the amplifier at the antenna
[23:06] <Mike-SA6BSS> ususly 15-20m away
[23:08] <Ian_> The bias-t saves you from borking equipment that is connected at one or other end of the coax. It provides DC blocking from the equipment signal path, while allowing legitimate RF signals through. The DC is inserted into the coax and tapped off from it through via a bias-t
[23:18] <SpacenearUS> New vehicle on the map: 03N1650485 - 12https://tracker.habhub.org/#!qm=All&q=N1650485
[23:19] <SpacenearUS> New vehicle on the map: 03M4433173 - 12https://tracker.habhub.org/#!qm=All&q=M4433173
[23:24] <SpacenearUS> New vehicle on the map: 03M2353004 - 12https://tracker.habhub.org/#!qm=All&q=M2353004
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[23:35] <Ian_> Is that understood Alex_ ?
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[00:00] --- Sat Feb 3 2018