highaltitude.log.20141119

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[00:43] <Laurenceb_> wow
[00:43] <Laurenceb_> http://uk.mathworks.com/matlabcentral/newsreader/view_thread/61961
[00:43] <Laurenceb_> Ken Davis is a genius
[00:44] <Laurenceb_> thats some brainmelting stuff
[00:53] <myier> In case anybody's interested, here is a preliminary report for the STELLA-2 flight that took place this summer, the one with the chase plane. SD card log says it went to 26.186 km in altitude, there's a link to the full log with pressure and partial temperature data (1-Wire sensors failed below -16) and a small picture
[00:53] <myier> http://theta.vinvin.tf/index.php/Stella-2
[00:53] <myier> but it's in french.
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[04:10] <arko> http://www.nasa.gov/press/goddard/2014/november/nasa-computer-model-provides-a-new-portrait-of-carbon-dioxide/#.VGwYFfnF98G
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[06:26] <SpacenearUS> New vehicle on the map: 03money1992_chase - 12http://habhub.org/mt/?focus=money1992_chase
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[07:08] <Lunar_LanderU> hello
[07:10] <ulfr> hi
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[07:49] <Rebounde1> morrn
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[07:59] <SA6BSS-Mike> morn
[08:05] <jededu> EDUPIC8 will launch at about 9:00
[08:05] <jededu> 434.225
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[08:14] <Rebounde1> UTC?
[08:15] <Maxell> HAB-ISH
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[08:18] <ok1cdj> gm all
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[08:19] <Maxell> hello ook
[08:19] <Maxell> ok1cdj:
[08:19] <SA6BSS> cafe morning
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[09:11] <SpacenearUS> New vehicle on the map: 03EDUPICM8 - 12http://habhub.org/mt/?focus=EDUPICM8
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[09:23] <SpacenearUS> New vehicle on the map: 03MM2 - 12http://habhub.org/mt/?focus=MM2
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[09:33] <DutchMillbt> Good morning is there a 'ish' time for EdupicM8
[09:33] <jededu> EDUPIC8M is up 434.225Mhz
[09:34] <DutchMillbt> hi jededu ...yep i seen thankz
[09:34] <DutchMillbt> i see...
[09:36] <fsphil> is this a foil?
[09:39] <jededu> It is a foil :)
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[09:41] <fsphil> heading my way, though probably turning before it gets here
[09:41] <SpacenearUS> New vehicle on the map: 03VK3YT - 12http://habhub.org/mt/?focus=VK3YT
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[09:45] <fsphil> well that was a big drop
[09:46] <SpeedEvil> https://www.indiegogo.com/projects/jolla-tablet-world-s-first-crowdsourced-tablet#home - oooh
[09:46] Action: SpeedEvil ponders purchase.
[09:47] <fsphil> it'll end badly
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[09:48] <jededu> It has very little lift Maybe 1g
[09:49] <fsphil> ah yes going back up
[09:49] <fsphil> getting kicked about by the wind
[09:49] <jededu> But then as always just a little more tape
[09:49] <jededu> :)
[09:50] <jededu> It should make 8-9k if it gets that far
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[09:51] <PB0AHX> !flights
[09:51] <SpacenearUS> 03PB0AHX: Current flights: 03EDUPICM8 duration test 10(29b3), 03EDUPIC8 duration test 10(61ac), 03B-64 434.500 Contestia 64/1000 10(3afe)
[09:52] <PB0AHX> !dial EDUPICM8
[09:52] <SpacenearUS> 03PB0AHX: Latest dials for 03EDUPIC8 10(29b3): 03434.2245 MHz
[09:52] <junderwood> PB0AHX, thanks. I was trying to remember that command
[09:53] <jededu> bad checsum its at 1156
[09:53] <junderwood> Now I just need it to get a bit higher, turn around and come this way
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[09:54] <PB0AHX> no problem
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[09:55] <PB0AHX> i wil trying listening via websdr here
[09:58] <PB0AHX> yes green lines via websdr nice
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[10:37] <junderwood> !dial EDUPICM8
[10:37] <SpacenearUS> 03junderwood: Latest dials for 03EDUPIC8 10(29b3): 03434.2241 MHz, 434.2245 MHz, 434.2238 MHz, 434.224 MHz
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[10:40] <zjztgj> does somebody know wich kind of foil the B-64 balloon is made of? When calculating with unmetalized 15 µm PET there should be more than 5% helium loss per day...
[10:41] <UpuWork> not even sure Leo knows exactly what its made of
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[10:42] <daveake> It's made of magic
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[10:42] <Geoff-G8DHE-Lap> Can we import DHL tracking info to SNUS ? So I can see where my Airspy has got to ?
[10:42] <zjztgj> but it's not metalized right?
[10:43] <Geoff-G8DHE-Lap> http://leobodnar.com/balloons/B-64/B-64-envelope.jpg
[10:43] <zjztgj> looks quite transparent
[10:43] <gurgalof> isn't Leo using hydrogen?
[10:44] <Geoff-G8DHE-Lap> http://leobodnar.com/balloons/B-64/
[10:44] <daveake> no
[10:44] <gurgalof> B-64 is magic
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[10:48] <SpeedEvil> zjztgj: it is metallised.
[10:48] <SpeedEvil> Leo uses transparent aluminium envelopes.
[10:48] <zjztgj> ok, very thin layer that is is still quite transparent?
[10:49] <craag> SpeedEvil: I didn't think B-64 was a metallised - I thought it was one of his custom ones?
[10:49] <SpeedEvil> err - star trek joke.
[10:50] <SpeedEvil> nvm
[10:52] <zjztgj> sry, don't get it
[10:52] <fsphil> how quaint
[10:52] <SpeedEvil> Transparent aluminium was a material from the future, with near-magical properties.
[10:53] <Darkside> didnt spock trade the recipe for a whale?
[10:53] <Darkside> or something
[10:54] <SpeedEvil> yes - vulcans love whale-meat
[10:54] <fsphil> mccoy and scotty give the 'inventer' the instructions to build it
[10:54] <Darkside> ahh
[10:54] <fsphil> they needed a sheet of it to hold in the weight of the water+whales
[10:54] <fsphil> </nerd>
[10:56] <zjztgj> ...so its obvious the best balloon material as well
[10:56] <gonzo_> picks up mouse and says 'computer....'
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[11:00] <Geoff-G8DHE-Lap> http://en.wikipedia.org/wiki/List_of_Star_Trek_materials
[11:02] <PH3V> Leo's balloon is made of Mylar
[11:02] <zjztgj> assuming 10 g payload and 13km floating altitude with 20µm foil made of a non-coated extra low permable polymehr will hardly reach a flight time of 100d
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[11:04] <Geoff-G8DHE-Lap> So what are you trying to say ?
[11:04] <daveake> aliens
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[11:04] <zjztgj> :D
[11:04] <PH3V> Sheets of Mylar (Polyester) that are meld together
[11:05] <Geoff-G8DHE-Lap> No mind melds were used in its making ;-)
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[11:06] <PH3V> melt ... haha
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[11:16] <jcoxon> unusual flight path for edupic
[11:16] <jcoxon> don't see that direction that often
[11:17] <daveake> "up"?
[11:17] <daveake> That is unusual for edupic :p
[11:17] <jcoxon> anyone experience with 3d printers - can suggest a starter one (happy to make a kit)
[11:20] <daveake> Early Xmas pressie for yourself? :)
[11:21] <jcoxon> well planning my own xmas present
[11:21] <mfa298> I've used a flash forge creator at work (makerbot clone) and it seems to do ok.
[11:21] <myier> maybe it has a magical topping up device that extracts the He from the atmosphere to top up the balloon
[11:21] <mfa298> about £450 on ebay for new
[11:23] <mfa298> although ebay prices seem to have gone up recently for them :(
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[11:24] <jcoxon> i was looking at hte printrbot
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[11:28] <mfa298> one thing to consider is which filaments you want to use. You need a heated bed for ABS (and it might help with PLA)
[11:29] <cm13g09> mfa298: ping
[11:29] <mfa298> cm13g09: pong
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[11:55] <Geoff-G8DHE-Lap> !dial edupicm8
[11:55] <SpacenearUS> 03Geoff-G8DHE-Lap: Latest dials for 03EDUPIC8 10(29b3): 031.101 MHz, 434.2241 MHz, 434.224721 MHz, 434.224 MHz, 434.224799 MHz, 434.2245 MHz, 434.2238 MHz
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[12:54] <M6XIMan> jcoxon: Griffin Delta
[12:54] <M6XIMan> I have an MendelMax but it's a pain in the pass that requires regular calibration
[12:55] <M6XIMan> jcoxon: http://griffinprinter.org/Griffin%20OS/index.php?board=6.0
[12:56] <M6XIMan> It's a scalable design made from parts that are easy to acquire
[12:56] <M6XIMan> You just need someone with a 3D printer to print out the 3D parts for you
[12:57] <x-f_> [possible endless loop detected]
[12:57] Nick change: x-f_ -> x-f
[12:59] <M6XIMan> I still have that pulsing transmission at 434.225 exactly where EDUPIC is
[13:00] <M6XIMan> 50KHz of it
[13:03] <M6XIMan> http://imgur.com/FGW0Dhn
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[13:04] <craag> M6XIMan: Ouch
[13:04] <mfa298> that's quite some qrm
[13:05] <M6XIMan> To put it mildly
[13:05] <craag> is it there 24/7?
[13:05] <M6XIMan> Lots os harmonics up and down the band too
[13:05] <M6XIMan> Yes, 24/7
[13:05] <M6XIMan> For the past week or so
[13:05] <craag> might be worth dfing
[13:06] <M6XIMan> I need a yagi and portable radio to try and get a fix on where it is coming from
[13:06] <craag> snap ;)
[13:06] <M6XIMan> I have quite a few 433MHz devices around the house, but nothing up at that frequency, and everything I have is behaving
[13:18] <M6XIMan> And then at 434.476 I have this monster: http://imgur.com/dMDZvvC
[13:21] <Upu-> !hysplit run EDUPICM8
[13:21] <SpacenearUS> 03Upu-: You need to be an admin to do that.
[13:22] Nick change: Upu -> UpuWork
[13:22] Nick change: Upu- -> Upu
[13:22] <Upu> !hysplit run EDUPICM8
[13:22] <SpacenearUS> 03Upu: Your job has been added to the queue. Check in a few minutes
[13:22] <mattbrejza> !ping b-64
[13:22] <SpacenearUS> 03mattbrejza: Last contact with 03B-64 was 032 days ago
[13:22] <mattbrejza> :(
[13:24] <Ian_> The b-64 envelope, I believe, is constructed from Ethylene vinyl alcohol (EVOH) is a formal copolymer of ethylene and vinyl alcohol and is helium filled.
[13:24] <UpuWork> lol
[13:24] <UpuWork> check Hysplit for EDUPCIM8
[13:24] <UpuWork> looks like its just going explode
[13:24] <UpuWork> Hysplit : Could go anywhere
[13:25] <Ian_> Seems game playing was rife. Probably Magic was an anagram :)
[13:26] <cm13g09> UpuWork: got the hysplit link?
[13:26] <cm13g09> !hysplit EDUPICM8
[13:26] <SpacenearUS> 03cm13g09: HYSPLIT for 03EDUPICM8 - 12http://spacenear.us/tracker/hysplit_cache/141119-13_154505_EDUPICM8.gif
[13:26] <cm13g09> AH
[13:26] <UpuWork> http://habitat.habhub.org/mobile-tracker/?filter=EDUPICM8
[13:26] <UpuWork> click Hysplit link
[13:27] <cm13g09> hah
[13:27] <cm13g09> that's a good one
[13:27] <UpuWork> thats going to give my rotator a good work out
[13:28] <mattbrejza> only 7 sats? how about glonass ones?
[13:28] <mattbrejza> or gps only antena?
[13:28] <UpuWork> if you use power saving you have to turn Glonass GNSS off
[13:29] <mattbrejza> oh right
[13:29] <jededu> Yes its off
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[13:39] <fsphil> just slightly out of range
[13:40] <fsphil> ooh I can see it
[13:40] <fsphil> aah not continous
[13:42] <lz1dev> !doa; edupicm8
[13:42] <lz1dev> derp
[13:42] <lz1dev> !dial edupicm8
[13:42] <SpacenearUS> 03lz1dev: Latest dials for 03EDUPIC8 10(29b3): 031.101 MHz, 434.2241 MHz, 434.224721 MHz, 434.2245 MHz, 434.2238 MHz
[13:43] <fsphil> a few characters out that time
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[13:43] <lz1dev> i should i add fat fingers detection
[13:43] <lz1dev> sigh
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[13:51] <fsphil> got one
[13:52] <fsphil> oh I guess that makes jededu a runner up in the fsphil challange :)
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[14:02] <jededu> fsphil close shame it turned
[14:04] <jededu> One of the predictions put it right over your head then dissapearing over iceland no good for tracking
[14:05] <jededu> Did anybody else get that dodgy checksum
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[14:06] <nigelp> $$EDUPICM8,133,14:04:24,5343.37771,-00156.86228,06,7655.0,0,0,6.75,1.49*6
[14:06] <jededu> MM need to fix that
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[14:55] <prog> hello
[14:57] <edmoore> hello prog
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[14:57] <nats`> plop prog
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[15:07] <luteijn> <nigelp> $$EDUPICM8,133,14:04:24,5343.37771,-00156.86228,06,7655.0,0,0,6.75,1.49*6 --> I guess the real CRC should be 0006 and the printf is not putting in the 0 padding?
[15:10] <jededu> No printf its written in basic its the timing
[15:11] <luteijn> same thing seems to have been wrong with edupic7 though, it was missing the occasional character in the checksum, e.g. 3 characters of checksum: <UpuWork> $$EDUPIC7,48,11:06:44,5315.80868,-00035.55189,08,5526.7,0,0,8.5,1.44*B3A
[15:12] <jededu> Yes I need to put some delays in
[15:12] <luteijn> and there I think the crc would have been 0x0B3A so again a zero in front missing, not something at the end..
[15:12] <daveake> You're not helping the general opinion of BASIC here :p
[15:12] <luteijn> do you ever see checksums with leading zeroes?
[15:12] <jededu> Lol
[15:13] <jededu> Its hard enough as it it daveake
[15:14] <luteijn> could still be the same kind of issue, if there's no 'printf' where you can use %0x maybe need to make sure the basic code is putting in leading zeroes...
[15:16] <luteijn> might need to add something like while len($crc)<4 :: $crc="0"&$crc :: wend (depending on dialect of basic used ;)
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[15:37] <adamgreig> I enjoyed reading http://letsmakerobots.com/blog/bdk6/picaxe-and-parallax-crimes-against-humanity recently
[15:37] <adamgreig> on the topic of BASIC :P
[15:38] <mattbrejza> post in on the picaxe forum
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[15:44] <luteijn> looking at Maxell's backlog of edupic1 strings at http://paste.sigio.nl/prvngwxrt/lnbqeg/raw , none of the checksums start with zeroes, and there's quite a few that seem to be missing leading zeroes, so although there might also be an issue with the final character being chopped off, I guess there also is a leading zeroes issue.
[15:45] <mattbrejza> i dont think it would make it to that log if the checksum failed
[15:45] <mattbrejza> so ...*FFF = ...*0FFF
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[15:48] <luteijn> dunno if *FFF would be considered 'right' by dl-fldigi or it would need *0FFF.
[15:48] <mattbrejza> i dont think fldigi checks checksum
[15:49] <luteijn> anyway thee backlog also has some obvious crapped up strings like $$$$EDUPIC1,1137,13:52:56,5143.49643,142.827,08,23141.9'&VFF ...
[15:49] <mattbrejza> it uploads anything that matches $$......\n
[15:49] <adamgreig> (yea it does? that's how it does the green decode bar?)
[15:49] <luteijn> green or red is diceded by the checksum afaik
[15:49] <adamgreig> (it uploads anything that matches $$....\n but also checks checksums itself)
[15:49] <mattbrejza> well only for the sake of the highlighting
[15:51] <luteijn> Is there an (easy) way to check backlog on the server side of 'accepted' strings to figure out if the leading zeroes are needed there for it to accept them?
[15:51] <adamgreig> http://habitat.habhub.org/logtail/
[15:52] <mattbrejza> http://habitat.habhub.org/ept/
[15:52] <mattbrejza> http://habitat.habhub.org/habitat/_design/ept/_list/csv/payload_telemetry/flight_payload_time?include_docs=true&startkey=[%22415cff8124b0bb7b5c441519ce2e29b3%22,%22415cff8124b0bb7b5c441519ce2a586f%22]&endkey=[%22415cff8124b0bb7b5c441519ce2e29b3%22,%22415cff8124b0bb7b5c441519ce2a586f%22,[]]&fields=_sentence
[15:52] <adamgreig> [2014-11-19 15:33:51,581] INFO habitat.parser MainThread: Parsing [ascii] '$$EDUPICM8,170,15:31:24,5400.62393,-00143.65217,05,7507.7,0,0,-5,1.47*EF6\n' (940f2299cb1643f084f0a2704b648b9974d9ad34c5ec87c9c31937596ad5b376) from G3ZGZ
[15:52] <adamgreig> [2014-11-19 15:33:51,598] DEBUG habitat.parser MainThread: Selected payload_configuration 415cff8124b0bb7b5c441519ce2a586f from flight 415cff8124b0bb7b5c441519ce2e29b3 for 'EDUPICM8'
[15:52] <adamgreig> [2014-11-19 15:33:51,598] DEBUG habitat.parser MainThread: Exception in UKHAS main parse: ValueError: No checksum found but config specifies one.
[15:52] <adamgreig> [2014-11-19 15:33:51,598] DEBUG habitat.parser MainThread: CantExtractCallsign exception in simple_binary: CantExtractCallsign
[15:53] <adamgreig> [2014-11-19 15:33:51,599] INFO habitat.parser MainThread: All attempts to parse failed
[15:53] <mattbrejza> so i cant find '*0' in ept
[15:53] <adamgreig> error from parser ^
[15:53] <adamgreig> saying "can't extract callsign" from one that's *EF6
[15:53] <mattbrejza> lol luteijn looks like you found a bug in edupic
[15:53] <adamgreig> uh
[15:53] <adamgreig> no checksum found* rather
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[15:56] <mattbrejza> luteijn_: http://habitat.habhub.org/habitat/_design/ept/_list/csv/payload_telemetry/payload_time?include_docs=true&startkey=[%22a1b24695f4a379ab0090c1e26ed66be8%22]&endkey=[%22a1b24695f4a379ab0090c1e26ed66be8%22,[]]&fields=_sentence
[15:56] <mattbrejza> there is no *0 in that log so it looks like 1/16 of edupic packets are being dropped
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[15:57] <luteijn> grmbl webclient..
[15:57] <edmoore> zero padding claims another victim?
[15:57] <luteijn> anyway, yeah, no *0 in edupicm8 or 7
[15:57] <mattbrejza> what was the last thing that you saw?
[15:57] <luteijn> and only 4 digit crc in the accepted ones from a quick glance over them.
[15:57] <UpuWork> in the check sum
[15:57] <UpuWork> thats new
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[15:58] <luteijn> (also reading zeuslog so idn't mis sanything.
[15:58] <daveake> refreshing to have new variations
[15:58] <adamgreig> luteijn: yes, http://habitat.habhub.org/logtail/ shows the parser issuing errors where it can't find a checksum on the non-4-digit ones
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[16:00] <luteijn_> so to be strict in what you send, lenient in what you receive: fix parser to try padding short checksums with 0s, and fix edupic9 to also zero-pad crc
[16:01] <adamgreig> well volunteered, https://github.com/ukhas/habitat/blob/develop/habitat/parser_modules/ukhas_parser.py#L105-L119
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[16:02] <luteijn_> I'll take a look at that then..
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[16:02] <UpuWork> before or after you fix your internet ? :)
[16:03] <luteijn_> before, I think :)
[16:03] <luteijn_> one issue I think will be that 2 character crc are also valid, so it wouldn't know to prepend 1, 2 or 3 zeroes..
[16:04] <mattbrejza> well is there any reason why not to return whatever is between * and \n ?
[16:05] <luteijn_> otherwise just a question of adding a couple of elif statements to try and find the * at different positions.
[16:05] <luteijn_> probably it could do that, but if it expects 2 or 4 hex digits later on, might be the wrong thing to do..
[16:07] <luteijn_> doing something like fields = string.split("*") and then taking whatever is the last field (maybe chopping off the \n) as the crc
[16:08] <mfa298> at the same time you could try upsetting a certain group and make it accept things with no checksum (not a totally serious suggestion)
[16:08] <edmoore> we lived with that for a few years
[16:08] <edmoore> painting the map
[16:09] <luteijn_> use len() to see how much to trimm off the end of string so it can return in the same format as the existing function.. then need to modify whatever the checksum verify routine is doing so "0000" compared to "" would return true..
[16:10] <adamgreig> this might be best done as a filter that can be specifically applied to the rare buggy payload
[16:11] <adamgreig> since it's really quite rare
[16:13] <luteijn_> from lines later on it seems to 'know' how long the crc should be as it's specified in the docs:
[16:13] <luteijn_> elif algorithm == "crc16-ccitt":
[16:13] <luteijn_> etc.
[16:15] <luteijn_> so having the checksum cutter work a little more general and returning anything from the last * until the newline as 'crc' and then padding with zeroes as needed at the point where it does the comparisons would probably not break anything and help in cases such as this.
[16:15] <mattbrejza> its also a bug that people dont tend to spot though, so who knows how common it is
[16:16] <luteijn_> probably could also flag it in someway so the payload program can be fixed for the next iteration of the flight so these packets show as greens ;)
[16:16] <mattbrejza> oh it show in fldigi as green?
[16:16] <mattbrejza> yea that wont help
[16:17] <luteijn_> non-zero-padded checksums show as red in dl-fldigi.
[16:17] <adamgreig> I would be inclined to make it a filter rather than accepting this as OK behaviour
[16:17] <mattbrejza> oh ok
[16:20] <Laurenceb> http://i.imgur.com/1sarmF2.png
[16:20] <luteijn_> also need to check if checksums that do start with zeroes are considered correct by comparisons like if checksums.crc16_ccitt(string) != checksum.upper(): raise ValueError("Invalid CRC16-CCITT checksum.")
[16:21] <adamgreig> all of this is why I think it's best to leave the central parsing business as-is, only accepting actually correct sentences
[16:21] <adamgreig> and make a filter we can just apply to edupic and other buggy payloads that corrects the checksum padding before it gets parsed
[16:22] <craag> The core should expect 100% correct data - thats is the only sane way to do it imo
[16:23] <adamgreig> kinda hinges on whether you consider zero padding the checksum to be a mandatory part of the protocol
[16:23] <adamgreig> http://habitat.readthedocs.org/en/latest/ukhas_parser.html
[16:24] <luteijn_> need to check the spec if it's ambiguous on that point then ;) checksum utility does do zero-fill though return hex((a << 8) | b)[2:].upper().zfill(4)
[16:24] <adamgreig> but by our specification, CRC16-CCITT is "The recommended algorithm, uses two bytes transmitted as four ASCII digits in hexadecimal. "
[16:24] <craag> Huh, now you say that - it does seem a *little* inconsistent with the decimal fields.
[16:24] <adamgreig> and likewise we define XOR as transmitted as two ASCII digits in hex
[16:25] <craag> but it's not like it saves much transmission time or anything
[16:25] <luteijn_> so no escape for edupic to consider crc a number and not needing leading zeroes :)
[16:25] <craag> 1 character every 16 strings, 2 characters every 16**2
[16:25] <adamgreig> http://ukhas.org.uk/communication:protocol has an example string with zero padding, and gives code samples that also produce zero padding
[16:26] <adamgreig> so I think it's unambiguous that we require zero padding to be compliant
[16:26] <adamgreig> so this is a bug in edupic and we should handle it with a payload filter
[16:26] <mattbrejza> youre making the assumption that people read the habitat docs :P
[16:26] <adamgreig> https://github.com/ukhas/habitat/blob/develop/habitat/filters.py
[16:27] <adamgreig> we already have zero_pad_coordinates and zero_pad_times, lol
[16:27] <adamgreig> mattbrejza: not at all!
[16:27] <adamgreig> just saying that the docs are unambiguous so we can safely call the payload wrong
[16:27] <adamgreig> doesn't matter if they read it or not ;)
[16:27] <adamgreig> not that we don't want to fix it
[16:27] <adamgreig> just means we should fix it with a filter not by changing the parser
[16:30] <luteijn_> would it still make sense to modify the if then else statement used to cut off the last few characters as the crc to something that grabs everything between * and \n then, so it can even reach the filter, or are the filters applied first?
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[16:33] <adamgreig> the filters are applied first
[16:33] <luteijn> hmm, so have to make sure it does check the checksum and not replaces it with something else after also zero-padding some other part of the payload..
[16:33] <adamgreig> http://habitat.readthedocs.org/en/latest/filters.html
[16:34] <adamgreig> the filters that zero pad other parts of the payload already fix checksums
[16:34] <luteijn> what if that checksum was wrong ?
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[16:36] <luteijn> so I sent a corrupt string, which happens to need 0-padding of e.g. time, and then the checksum gets overwritten, so you don't notice it was corrupt anymore?
[16:36] <adamgreig> https://github.com/ukhas/habitat/blob/develop/habitat/utils/filtertools.py#L48-L51
[16:36] <adamgreig> so no, it won't overwrite an invalid checksum
[16:37] <adamgreig> so you'd want to run the checksum padding filter first
[16:37] <adamgreig> but that's ok, it's an ordered list
[16:37] <luteijn> ok, so need to apply zeropad-cksum filter first, then
[16:38] <adamgreig> sure, but they are essentially well isolated
[16:38] <adamgreig> bbl
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[19:15] <Lunar_Lander> evening
[19:24] <DL7AD> hi Lunar_Lander
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[19:31] <rob_m0dts> EDUPICM8 saw me come online and diverted!
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[19:36] <fsphil> hah
[19:36] <fsphil> that was rather a sharp turn
[19:36] <M6XIMan> So B-64 is heading into a shit^H^H^H^Hsnowstorm
[19:37] <SA6BSS> wonder if edupic is leaking or if its high clouds.
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[19:41] <jededu> Looks EDUPICM8 is going for a swim
[19:42] <mattbrejza> jededu: did you see we found a bug in edupic earlier?
[19:42] <jededu> Yes Ill fix it before the next flight
[19:43] <mattbrejza> cool
[19:44] <jededu> Ill do some trickery to stop it dropping the 0's its the same problem I had with the GPS padding
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[19:56] <M6XIMan> jededu: What's the balloon on this flight? 36" foil?
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[20:10] <jededu> <M6XIMan> Yes its a foil
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[20:27] <mclane_> question to upu on the new pi in the sky board (v2.3): why did you use the MTX2 instead of the NTX2B-FA?
[20:27] <daveake> smaller
[20:27] <daveake> less space on the A+
[20:28] <mclane_> ok, understood.
[20:29] <mclane_> other question: from the schematics I understand that all components are supplied with 3.3 V from the a+ 3.3V regulator
[20:29] <mclane_> correct?
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[20:30] <daveake> yes
[20:32] <mclane_> so if I understand the power supply concept correctly: battery -> 5V buck/boost switcher (LTC3112) -> 3.3V switcher on the a+ -- why that ?
[20:33] <daveake> Because, unlike the A/B, you can't power the Pi from 3.3V into the 3.3 and 5V pins
[20:34] <mclane_> mhm - I tried to power the a+ on the 5V pin down to 3.3V and it works
[20:35] <daveake> Upu did the cct design and I don't know if he tried or considered that
[20:35] <mclane_> so I want to try battery (3 cells = 4.5V) -> 5V pin and then supply the rest out of the 3.3V pin
[20:35] <mclane_> from the a+ - at least that worked on the bench
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[20:36] <daveake> Yeah I don't know how reliable that would be. We've gone for the safe option. For the target usage we get plenty of run time anyway
[20:38] <mclane_> ok understood - however, I target to use two a+ in our nect payload (we need 2 cameras)
[20:38] <Upu> You can't fire 3.3V into the board across the 5V any more doens't work
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[20:39] <Upu> The recommended way is to stuck 5V into the board and let the on board buck sort the 3.3 and1.8 V out
[20:39] <Upu> stick
[20:39] <mclane_> at least on my board it works
[20:39] <mclane_> (maybe just by chance)
[20:39] <Upu> you can't just stick 3.3V into the 5V
[20:39] <Upu> otherwise it bypasses the dual output regulator that provides 1.8V too
[20:41] <Upu> but if you're using an adjustable regulator its only resistors anyway
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[20:42] <Upu> I appreciate what you're trying to do though
[20:42] <Upu> test it for us :)
[20:43] <Upu> (I may send 2 up one running at 3.3V and one at 5V)
[20:43] <mclane_> is there somewhere a schematic diagram of the power supply chain of the a+?
[20:44] <daveake> AFAIK it's the same as the B+ which is out there
[20:44] <Upu> https://github.com/raspberrypi/documentation/blob/master/hardware/raspberrypi/schematics/Raspberry-Pi-B-Plus-V1.2-Schematics.pdf
[20:45] <Upu> find out what U3 is
[20:45] <mclane_> ok thank you - I will have a look
[20:45] <Upu> get data sheet
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[20:53] <mclane_> I found this: https://learn.adafruit.com/introducing-the-raspberry-pi-model-b-plus-plus-differences-vs-model-b/power-supply
[20:53] <mclane_> describes the b+ power supply
[20:54] <mclane_> U3 should be RT8020AGQW
[20:56] <daveake> step down
[20:56] <Upu> our board has that protection circuit
[20:56] <Upu> you can hot swap power with it
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[21:06] <mclane_> yeah, that may be necessary for a robust design
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[21:09] <mclane_> need to step out - gn
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[21:21] <SA6BSS> everybody keeps their breath as edupic starts to climb...fingers crossed
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[21:25] <jcoxon> pull up edupicm8 pull up!
[21:27] <jcoxon> probably worth emailing the list to wake up more nothern listeners
[21:28] <SA6BSS> yeap, lot of local rain in that aeria that probably drags the balloon down http://www.raintoday.co.uk/
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[21:29] <SA6BSS> yay +0,4
[21:30] <jcoxon> hehe
[21:30] <Upu> hadn't noticed how low that was
[21:30] <jcoxon> every metre counts
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[21:43] <jcoxon> it seems to be climbing
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[21:44] <SA6BSS> looks good
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[21:47] <Upu> !hypslit run EDUPICM8
[21:47] <Upu> !hysplit run EDUPICM8
[21:47] <SpacenearUS> 03Upu: Your job has been added to the queue. Check in a few minutes
[21:50] <Laurenceb_> http://i.imgur.com/Pj7Gd2S.png
[21:50] <Laurenceb_> now with spline fitter
[21:52] <Martin_G4FUI> !dial EDUPICM8
[21:52] <SpacenearUS> 03Martin_G4FUI: Latest dials for 03EDUPIC8 10(29b3): none
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[21:53] <Geoff-G8DHE_> more cloud and rain ahead of edupicm8 http://360.g8dhe.net/HAB_Flights/2014_Flights/EDUPICM8_20141119/EDUPICM8_201411192150.jpg
[21:54] <Martin_G4FUI> Anyone have the frequency/mode etc for EDUPICM8?
[21:54] <Geoff-G8DHE_> Idial edupicm8
[21:54] <Geoff-G8DHE_> !dial edupicm8
[21:54] <SpacenearUS> 03Geoff-G8DHE_: Latest dials for 03EDUPIC8 10(29b3): none
[21:54] <Geoff-G8DHE_> 434.224500 last I saw it
[21:55] <Martin_G4FUI> Thanks Geoff-G8DHE !
[21:55] <SA6BSS> RTTY, 100, 8N2
[21:55] <SA6BSS>
[21:55] <SA6BSS> Transmission: 2 Strings every 120 Seconds with a 2.5 second preamble
[21:55] <SA6BSS>
[21:57] Last message repeated 2 time(s).
[21:57] <Martin_G4FUI> Thanks SA6BSS - nothing heard yet ...
[21:58] <SA6BSS> listenig in on G4TNX websdr in Cleethorpes
[21:58] <SA6BSS> its verry weak on the sdr but you can se it on the waterfall
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[21:59] <SA6BSS> http://radiogeek.co.uk/
[21:59] <Martin_G4FUI> Heard the last transmission - very loud here, but coudln't decode it, probably a settings issue with fldigi
[21:59] <Upu> using VAC ?
[22:01] <Martin_G4FUI> Got it. Green string but error message in fldigi!
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[22:15] <Lunar_Lander> good night!
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[22:54] <jededu> WOW i thought EDUPICM8 was a gonner
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[23:00] <Geoff-G8DHE_> Its just about to pass under another heavy rain cloud ..
[23:01] <Geoff-G8DHE_> http://360.g8dhe.net/HAB_Flights/2014_Flights/EDUPICM8_20141119/index.php?ind=1
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[23:26] <SpacenearUS> New position from 03B-64 after 032 days silence - 12http://habhub.org/mt/?focus=B-64
[23:27] <DL7AD> yeeha!
[23:27] <DL7AD> !hysplit B-64
[23:27] <SpacenearUS> 03DL7AD: HYSPLIT for 03B-64 - 12http://spacenear.us/tracker/hysplit_cache/141119-22_175988_B64.gif
[23:27] <DL7AD> it's exactly where it should be
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[23:30] <lz1dev> !hysplit run b-64
[23:30] <SpacenearUS> 03lz1dev: Your job has been added to the queue. Check in a few minutes
[23:32] <Maxell> !hysplit B-64
[23:32] <SpacenearUS> 03Maxell: HYSPLIT for 03B-64 - 12http://spacenear.us/tracker/hysplit_cache/141119-23_177044_B64.gif
[23:34] <lz1dev> !hysplit add edupicm8
[23:34] <SpacenearUS> 03lz1dev: Added 03edupicm8 to defaults
[23:34] <lz1dev> !hysplit run edupicm8
[23:34] <SpacenearUS> 03lz1dev: Your job has been added to the queue. Check in a few minutes
[23:35] <SpeedEvil> woo
[23:36] <SpeedEvil> I'd just clicked it ~5 min before, and found nothing
[23:36] <SpeedEvil> nice
[23:36] <lz1dev> !hysplit edupicm8
[23:36] <SpacenearUS> 03lz1dev: HYSPLIT for 03EDUPICM8 - 12http://spacenear.us/tracker/hysplit_cache/141119-23_177158_EDUPICM8.gif
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[00:00] --- Thu Nov 20 2014