highaltitude.log.20190122

[00:00] <Darkside> mwheeler: hows lunch lol
[00:00] <mwheeler> Very good. New York Deli, would recommend
[00:00] <Darkside> https://tracker.sondehub.org/?sondehub=1#!mt=roadmap&mz=6&qm=6_hours&f=RS_DFM09-17028065&q=RS_*;*chase
[00:00] <Darkside> ok yes the DFM CRC checking needs work i think
[00:01] <Darkside> or the person receiving needs to adjust their 'error' thresholds
[00:01] <mwheeler> Yeah, the dfms fail in a way that puts them inside the error thresholds most of the time
[00:01] <Darkside> urgh
[00:02] <Darkside> so yeah, crc checking needs work
[00:02] <mwheeler> It's rare for me to a see a dfm though so I haven't got good samples to play with
[00:02] <Darkside> hmm
[00:02] <Darkside> maybe we should add in that option to dump the audio out to a file
[00:02] <mwheeler> Plus we need to sneak our antenna outside again
[00:02] <Darkside> just use 'tee' to dump it to a file
[00:02] <mwheeler> Yup
[00:03] <mwheeler> Maybe with my funemployment
[00:03] <Darkside> it would be a useful debig flag
[00:03] <Darkside> debug*
[00:03] <mwheeler> I should setup emails / notifications for it
[00:03] <mwheeler> Yeah
[00:03] <Viproz> maybe something is wrong, on my PC with a recording I detect a -M10 with rs_scan with frquency at 401 and bp of 22k but the raspberry pi is not finding anything
[00:03] <Darkside> then we could just contact the people running the stations in europe and get them to send us some data
[00:03] <Darkside> hmm
[00:03] <Viproz> oh here we go finally, I don't know why it was so long
[00:04] <Darkside> so we didnt change anything in rs_detect
[00:04] <Darkside> just in your m10 decoder
[00:04] <Darkside> and it was to do with types
[00:04] <Darkside> u_short vs unsigned short i think
[00:04] <mwheeler> Yup and including some libs for strings
[00:04] <Viproz> maybe it was just the samplerate difference, 48k vs 22k
[00:05] <Darkside> really need to ditch rtl_fm...
[00:05] <Darkside> urgh
[00:05] <Darkside> ill poke csete again about him releasing nanosdr
[00:07] <Darkside> that has much more customizability with filters and sample rates
[00:07] <Darkside> and supports more than the RTLSDR (though we still need a rtl_power replacement)
[00:08] <Darkside> https://github.com/csete/nanosdr
[00:08] <Darkside> hmm
[00:08] <Darkside> thats very old.
[00:08] <Viproz> would be really nice indeed, I'm pretty sure that with a higher SR we would get many more frames
[00:08] <Darkside> yeah
[00:09] <Darkside> i have also made som eprogress towards using david rowe's fsk demodulator
[00:09] <Viproz> although with the old code it would be a problem to have too high of a sample rate since it's very sensible to noise
[00:09] <Darkside> that should give a serious performance improvement, but also give the ability to obtain SNR metrics
[00:10] <Darkside> but i need a data source to feed into it. at least it can take raw IQ data, so i can theoretically pumo the entire IQ output from a rtlsdr into fsk_demod, and just tell it where to look
[00:10] <Darkside> this is on my TODO list for the next few onths btw
[00:10] <Darkside> months*
[00:18] <Viproz> mwheeler, Darkside I'm getting errors when compiling using gcc 7.3.0 with Cygwin64 if I include the -std=c++11, no errors without
[00:18] <Darkside> urgh
[00:18] <Darkside> its a gcc version thing
[00:18] <Darkside> totally
[00:18] <Viproz> https://pastebin.com/dj6cQfhy
[00:19] <Darkside> i think the behaviour has changed over the last few major versions
[00:19] <Darkside> hrm
[00:19] <Darkside> not finding -lm i guess
[00:19] <Darkside> i wonder if the ordering of the arguments to g++ matters
[00:20] <Darkside> like should that -std=c++11 be somewhere else
[00:20] <Darkside> i've confirmed it working on g++ 4.9.2 and something nuch newer
[00:20] <Darkside> 9.something
[00:20] <Viproz> same if I put it right at the beginning
[00:22] <Darkside> ffs gcc
[00:24] <Darkside> ok its a math.h thing
[00:24] <Viproz> Oh I found the issue I had decoding the M10, the antenna needed to be 20cm to the right.. Having an antenna inside is black magic
[00:24] <Darkside> math.h doesnt include M_PI in some versions
[00:24] <mwheeler> https://stackoverflow.com/a/26065595
[00:24] <mwheeler> hmmm
[00:25] <Viproz> that's easy to fix, you know for the sentenv thing ? It's dependant on the timezone if I don't use that
[00:26] <Darkside> got to be some default include thing
[00:26] <Darkside> making this work across both windows and linux is a pain
[00:26] <mwheeler> #include <stdlib.h> ?
[00:27] <Darkside> linux and OSX is bad enough in some cases
[00:27] <Viproz> Otherwise auto_rx is now decoding the RS in Paris without any issue, not uploading to anything since I haven't configured it but working
[00:28] <Darkside> woot
[00:29] <Darkside> i noticed theres someone else using the M10 decoder
[00:29] <Darkside> in estonia
[00:29] <Darkside> https://tracker.sondehub.org/?sondehub=1#!mt=roadmap&mz=9&qm=6_hours&f=RS_M10-809-2-14456&q=RS_*;*chase
[00:29] <Viproz> mwheeler, same with the include
[00:31] <Viproz> This serial number is so nice compared to the one dxl made, we can directly see that it was manufactured quite recently, september 2018
[00:32] <Darkside> oh the 809 is that?
[00:32] <Darkside> nice
[00:32] <Darkside> the letter and first 2 numbers in the vaisala serial numbers is similar
[00:32] <Darkside> i spotted a few 2019 vaisala sondes launched out of finland
[00:32] <Darkside> i suspect they may have some from the vaisala factory
[00:34] <Viproz> yeah rs1729 figured that out, he also found what the data I didn't understand was so we can include GPS information now if we want
[00:34] <Darkside> https://www.vaisala.com/sites/default/files/documents/Vaisala%20Radiosonde%20RS41%20Serial%20Number.pdf
[00:34] <Darkside> its on a pdf on their website
[00:34] <Darkside> lol
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[00:36] <Viproz> no I mean for M10s, I saw that for the other RS quite a few psf explaining all the data exist !
[00:36] <Darkside> oh right
[00:37] <Darkside> i havent had much contact with rs1729 (also known as Zilog80)
[00:37] <Darkside> he's mainly active on some forums which are all in polish ( i think)
[00:37] <Darkside> or german
[00:37] <Darkside> or some other language which i also dont understand :-(
[00:37] <Viproz> Yeah I just talked to him though an issue I created on his project https://github.com/rs1729/RS/issues/7
[00:38] <michal_f> clearly german
[00:38] <michal_f> :)
[00:39] <Viproz> I have to do a report on what I found for the aux data btw
[00:40] <Darkside> would be good to feed back your updates to the M10 decoder into his codebase
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[00:42] <Viproz> https://aprs.fi/#!mt=roadmap&z=10&call=a%2FME756292&timerange=3600&tail=3600 working, I think I'm going to switch back to the DFM to figure out what's wrong and get more recordings
[00:42] <Darkside> cool
[00:42] <Darkside> haha we found out where the R... series sondes launched from
[00:42] <Darkside> https://www.google.com.au/maps/place/60%C2%B016'33.6%22N+24%C2%B052'26.4%22E/@60.2771357,24.872638,1217m/data=!3m1!1e3!4m5!3m4!1s0x0:0x0!8m2!3d60.276!4d24.874
[00:42] <Darkside> red marker is the first position
[00:43] <Darkside> just to the north... vaisala HQ
[00:44] <Viproz> Oh, it exploded already
[00:47] <Viproz> The issue with my updates is that I wrote it from scratch using C++ instead of C and a completely different structure, I implemented some of what he did but not everything so the two are pretty much in parallel
[00:48] <Darkside> well i think yours is a bit better :-)
[00:48] <Darkside> oh, somethign else that may be useful - a way to bypass the 'data slicing' input
[00:48] <Darkside> david's fsk_Demod will output one-bit-per-byte output, i.e. 0x00 and 0x01
[00:48] <Darkside> argh
[00:49] <Darkside> one-byte-per-bit that should be
[00:49] <Darkside> if you can accept that input, then plugging in david's demodulator shoudl be easier
[00:51] <Viproz> huh ? does it do the manchester decoding on it's own ?
[00:51] <Darkside> oh no, it doesnt do thatbit
[00:51] <Darkside> its just outputing symbols
[00:51] <Darkside> you'd still need to do that part
[00:51] <Darkside> but you can skip the data slicing
[00:53] <Viproz> so you can tell it to output a byte that is very negative if it's likely to be a 0 and very positive if it's likely to be a 1 also ?
[00:53] <Darkside> oh it can do soft decision output too
[00:53] <Darkside> not sure what format its in
[00:53] <Darkside> we use that for LDPC decoding in anothe rproejct
[00:55] <Viproz> okay, would be pretty easy to implement, you could probably completely bypass the M10Decoder.cpp and just use M10GeneralParser and its derivative
[00:56] <Viproz> most of what's in M10Decoder is getting the audio file bytes and trying to decode them, once the frame bytes are defined it's sent to M10GeneralParser and gets processed there
[00:58] <Viproz> (that's why I love c++ so much more than c, it would have been a nightmare to do this in c and if you push it you end up with dxl code)
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[01:14] <Darkside> Viproz: hehe
[01:15] <Darkside> yes
[01:15] <Viproz> There seems to be better alternatives to the timezonne issue I had, I can probably remove the setenv call, I'll see tomorrow
[01:16] <Viproz> Anyhow I'm off for today, have fun at your conference !
[01:20] <Darkside> cheers!
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[01:22] <Darkside> https://twitter.com/darksidelemm/status/1087520248562049024
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[06:14] <PE2BZ> Darkside good (morning / afternoon / evening) can I quote you and use the images on the Dutch Radiosonde forum, bout the new RS41 ?
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[08:17] <SpacenearUS> New vehicle on the map: 03YERRA_BACKUP - 12https://tracker.habhub.org/#!qm=All&q=YERRA_BACKUP
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[09:33] <Darkside> PE2BZ: sure?
[09:33] <Darkside> what images?
[09:34] <Darkside> the 2019 one?
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[11:37] <SpacenearUS> New vehicle on the map: 03DG2FS_chase - 12https://tracker.habhub.org/#!qm=All&q=DG2FS_chase
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[13:00] <PE2BZ> Darkside from the launch location and the 2019 model of the RS41 indeed
[13:29] <vaizki> why are you so interested in the 2019 RS41?
[13:29] <vaizki> significant changes in that one?
[13:37] <PE2BZ> lol no, just a kind of bet when the first R series would be launched :-)
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[14:12] <Heppie_2E0VTO> Hi All, Another LoRa question from me. Is the calling channel functionality used much since its inception? If so is there an agreed frequency? More to the point is there a frequency/mode i should leave my gateway on unattended?
[14:17] <daveake> It hasn't been used much, but should be as people (me for a start) remember to use it! We settled on 433.650MHz, chosen as the quietest part of the 433/434MHz ISM band.
[14:18] <fsphil> does your gateway listen to it by default?
[14:18] <daveake> You know, that would be a jolly good idea
[14:19] <daveake> I shall update github forthwish-ish
[14:20] <craag> :)
[14:20] <Heppie_2E0VTO> :)
[14:22] <daveake> Done :)
[14:24] <Heppie_2E0VTO> I will get my 1/4 wave built and set up the Pi to the calling mode :)
[14:24] <daveake> Excellent
[14:24] <daveake> And I shall actually fly it a few times this year :)
[14:25] <Heppie_2E0VTO> Might be able to pick it up down here in Portsmouth, fingers crossed :)
[14:25] <daveake> Easily
[14:26] <Heppie_2E0VTO> I do have some awful QRM from a Virgin Media cabinet next to my house :(
[14:26] <daveake> craag has managed to rx some of mine from nearby, down to pretty low altitudes
[14:26] <daveake> Including 0m AGL once but that had help :p
[14:27] <Heppie_2E0VTO> Balloon to Balloon relay?
[14:28] <craag> yes
[14:28] <daveake> Yeah, probably my happiest HAB moment
[14:28] <PE2BZ> You Habbiest HAP moment ?
[14:29] <daveake> :)
[14:29] <daveake> I'll do something similar this year ... I have a payload that will be dropped and I'll probably put a repeating tracker on the balloon
[14:40] <Heppie_2E0VTO> edmoore: Sorry to bother you. Is your callsign M0TEK?
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[14:58] <SpacenearUS> New vehicle on the map: 03DG2FS-1 - 12https://tracker.habhub.org/#!qm=All&q=DG2FS-1
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[15:31] <daveake> Getting ready for some sonde chasing (when one deigns to land near me) ... https://twitter.com/daveake/status/1087734024771170304
[15:34] <fsphil> the castor bay sonde sometimes lands near you, but it's all wet atm, http://predict.habhub.org/hourly/castorbay/
[15:35] <daveake> Yeah. Sometime :)
[15:43] <Heppie_2E0VTO> Looks like quite a few fly over my QTH. Can you just use a RTL-SDR?
[15:45] <fsphil> yeah, and https://github.com/projecthorus/radiosonde_auto_rx
[15:46] <Heppie_2E0VTO> Cheers :)
[15:53] <SpacenearUS> New vehicle on the map: 03DG2FS-12 - 12https://tracker.habhub.org/#!qm=All&q=DG2FS-12
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[16:06] <SpacenearUS> New vehicle on the map: 03Pusteblume_chase - 12https://tracker.habhub.org/#!qm=All&q=Pusteblume_chase
[16:07] <fsphil> the met launched a load today. maybe trying to refine the model to see where the snow is going
[16:08] <fsphil> (a load being 3)
[16:15] <Heppie_2E0VTO> Over the last 24 hours 3 have gone over my QTH near Portsmouth and seem to have come from near Salisbury. Didn't think there was a launch site there?
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[16:50] <michal_f> I send myself sonde predicts every day, in case something is supposed to drop near me. Notifies me on slack
[16:51] <michal_f> https://pastebin.com/zXFWgtpD if anyone wants it
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[18:59] <Darkside> daveake: the UDP output might give you more information for your app
[18:59] <Darkside> like, a callsign
[18:59] <Darkside> sorry, the other UDP output :P
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[19:15] <daveake> Ah right I shall investigate
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[19:50] <Ogmaster> Hey guys, I have a weird problem. I am currently using the NTXB module to send some messages and it works fine and I recieve them with no error bits.
[19:50] <Ogmaster> However, when I add to the mix a GPS breakout board. There are lots and lots of error bits. Which is weird.
[19:51] <Ogmaster> Using arduino Uno
[19:51] <Ogmaster> Is there some type of interference?
[19:51] <fsphil> does the signal look or sound different?
[19:52] <fsphil> also how is the ntx2b and the gps wired up? they might be using the same pins
[19:52] <Ogmaster> Yes they share the same 5v
[19:52] <Ogmaster> Is that bad?
[19:53] <Ogmaster> I can't tell sound difference to be honest.
[19:53] <fsphil> shouldn't be. what about the other pins?
[19:53] <SA6BSS-Mike|2> screenshots is always good :) ...imgur
[19:53] <Ogmaster> Yes one second
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[20:00] <Ogmaster> https://imgur.com/a/pZTLXXb
[20:00] <Ogmaster> Not the best picture
[20:00] <Ogmaster> Tx on 3 rx on 2
[20:00] <Ogmaster> For the GPS
[20:01] <Ogmaster> Ntx2b module digital pin 13
[20:01] <SA6BSS-Mike|2> you got any of you rx setup like dlfldigi and rx program running
[20:02] <Ogmaster> I'll run it now
[20:03] <SA6BSS-Mike|2> have to go in for a while... im sure some others in here that jumo in and guide back in 30
[20:04] <Ogmaster> Alright thanks!
[20:06] <fsphil> could be a power issue
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[20:08] <Ogmaster_> https://imgur.com/a/4S5KoBK
[20:09] <fsphil> yeah see how wobbly it is
[20:11] <fsphil> does the arduino just have the one 5v supply pin?
[20:11] <fsphil> and how are you powering it all?
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[20:12] <Ogmaster_> its cnnectred to my pc
[20:12] <Ogmaster_> via usb
[20:12] <Ogmaster_> connected*
[20:12] <Ogmaster_> and yes it has just the one 5v
[20:12] <Ogmaster_> I am guessing no one has had this setup before?
[20:13] <fsphil> yeah, but they'll all be a bit different
[20:13] <PE2BZ> Can you add a capacitor to the +5 V on the arduino or the gps module ?
[20:13] <PE2BZ> Do you happen to have a multimeter to measure the DC voltage ?
[20:13] <Ogmaster_> I'm going to test this on anarduino MEGA and tell you what happens
[20:14] <Ogmaster_> be back in a bit
[20:14] <Ogmaster_> ill test your theory, would be good for others to know too
[20:14] <fsphil> the gps current draw is probably causing the voltage at the ntx2 to wobble
[20:14] <PE2BZ> Yeah, my gps did need 70 mA to look for satellites....
[20:14] <fsphil> the breadboard might be the cause, or the power supply or a weak regulator on the arduino board
[20:16] <PE2BZ> you forgot the Chines USB cable diameter ;-)
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[20:48] <SpacenearUS> New vehicle on the map: 03PC4L-HAB - 12https://tracker.habhub.org/#!qm=All&q=PC4L-HAB
[20:56] <Ogmaster_> okay its better on the MEGA
[20:56] <Ogmaster_> much better
[20:56] <Ogmaster_> however after 2 or 3 messages it just stops
[20:56] <Ogmaster_> which is odd#
[20:57] <Ogmaster_> the waterfall becomes a single line
[20:58] <fsphil> that sounds like a software bug :)
[21:04] <SpacenearUS> New vehicle on the map: 03DK0FNF-11 - 12https://tracker.habhub.org/#!qm=All&q=DK0FNF-11
[21:07] <Ogmaster_> would anyone care to take a look at what the bug might ve?
[21:07] <Ogmaster_> be*
[21:12] <Ogmaster_> https://quickfileshare.org/U9d/Telemetry.ino
[21:14] <fsphil> put it on pastebin
[21:15] <Ogmaster_> https://pastebin.com/CmcJh2Wd
[21:18] <fsphil> what does it transmit?
[21:19] <Ogmaster_> "Hey guys! This is being sent over radio! Altitude: Latitude: Longitude:
[21:23] <fsphil> only had a glance, but I've noticed
[21:23] <fsphil> char datastring[80];
[21:23] <fsphil> and
[21:23] <fsphil> readings.toCharArray(datastring, 120);
[21:24] <fsphil> I don't know how long your string is. there's a fair chance it's overflowing
[21:25] <fsphil> the arduino docs are not great on toCharArray's behaviour
[21:28] <Ogmaster_> ah I see ill make it bigger
[21:33] <Ogmaster_> oh wow! I think it's fixed!
[21:34] <Ogmaster_> Thank you so much!
[21:36] <fsphil> np
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[23:13] Nick change: BitEvil -> SpeedEvil
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[00:00] --- Wed Jan 23 2019