highaltitude.log.20190207

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[08:20] <nimnil> Question: In fldigi i dont have the options that are used in all manuals. Example: I dont have RTTY tab under configuration
[08:22] <nimnil> https://imgur.com/a/puO7hh7 <-- my settings
[08:23] <nimnil> http://www.w1hkj.com/FldigiHelp-3.21/html/config-rtty-rx.png <-- guide settings
[08:23] <fsphil> looks like the newer versions dropped the R. how odd
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[08:28] <nimnil> so there is no rtty support ? :O
[08:28] <nimnil> what should i use instead?
[08:28] <fsphil> TTY is it, they've just renamed it for some reason
[08:29] <nimnil> But i still cant find the same settings. :D
[08:29] <nimnil> now i found. :D
[08:34] <nimnil> https://ukhas.org.uk/guides:sdr_tracker anyone here involved with this site? its not working. cert error
[08:35] <fsphil> oops
[08:48] <nimnil> fsphil: do you know how i configure my sdr in fldigi?
[08:52] <fsphil> it largely depends on your OS (windows / linux / mac) and sdr model
[08:52] <fsphil> basically, get the SDR software working and playing audio, and then configure fldigi to record from that
[08:56] <nimnil> ah okay.
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[09:07] <SpacenearUS> New vehicle on the map: 03HORUSLORA1 - 12https://tracker.habhub.org/#!qm=All&q=HORUSLORA1
[09:08] <SpacenearUS> New vehicle on the map: 03HORUSBINARY - 12https://tracker.habhub.org/#!qm=All&q=HORUSBINARY
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[09:15] <SpacenearUS> New vehicle on the map: 03HORUS - 12https://tracker.habhub.org/#!qm=All&q=HORUS
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[09:42] <PE2BZ> SA6BSS-Mike less as 2 gram ! Very nice !
[09:43] <PE2BZ> Close, but so far https://tracker.sondehub.org/?sondehub=1#!mt=osm&mz=9&qm=All&f=RS_P2950131&q=RS_P2950131
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[11:08] <SpacenearUS> New position from 03SP9UOB after 032 days silence - 12https://tracker.habhub.org/#!qm=All&q=SP9UOB
[11:11] <SpacenearUS> New vehicle on the map: 03SP9UOB-P32 - 12https://tracker.habhub.org/#!qm=All&q=SP9UOB-P32
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[12:03] <SpacenearUS> New vehicle on the map: 03PR8MP_chase - 12https://tracker.habhub.org/#!qm=All&q=PR8MP_chase
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[13:18] <SA6BSS-Mike> PE2BZ: and that is with the pin head on, thats 0,5 gram that is cutof after testing / before flight :)
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[14:42] <SpacenearUS> New vehicle on the map: 03STUDY - 12https://tracker.habhub.org/#!qm=All&q=STUDY
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[17:26] <SpacenearUS> New vehicle on the map: 03SP8GON_chase - 12https://tracker.habhub.org/#!qm=All&q=SP8GON_chase
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[19:16] <michal_f> !flights
[19:16] <SpacenearUS> 03michal_f: Current flights: 03Horus 52 - SHSSP 2019 10(99f0)
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[19:28] <SpacenearUS> New position from 03MAD-1a after 0315 days silence - 12https://tracker.habhub.org/#!qm=All&q=MAD-1a
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[19:47] <SpacenearUS> New position from 03BSS18 after 0320 days silence - 12https://tracker.habhub.org/#!qm=All&q=BSS18
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[21:39] <SpacenearUS> New vehicle on the map: 03ICSPACE4 - 12https://tracker.habhub.org/#!qm=All&q=ICSPACE4
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[21:51] <Viproz> Darkside, I'm starting to understand my frustration working with rtl_fm vs SDRSharp, with some samples I'm testing with some good reception if I do a simple FM demodulation at a samplerate of 24kHz I get 0/16 decodes (it detected 16 headers but no correct CRC) but if I decimate to a samplerate of 48kHz and then bandpass filter cutting half of the bandwidth (-> bandwidth of 24kHz) I then get 18/21 decodes so it's night and day
[21:52] <Viproz> I'm going to do a writeup of what I did in the issue where we discuss with Zilog so that you guys can verify what I did
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[21:58] <Darkside> Viproz: replacing rtl_fm with something that more adjustment would be good
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[21:59] <Darkside> but yes, theres needs to be bandpass filtering before the FM Demodulator, i know this for sure
[21:59] <Viproz> yeah csdr would be perfect if it worked on more places, really highly adjustable, I think I'm going to implement it tonight for a RS recovery tomorrow, I really want to use chasemapper since I won't have my PC
[22:00] <Darkside> ill poke the author of nanosdr about releasing it
[22:00] <Darkside> since that would be an improvement
[22:00] <Viproz> poor guy, each time I bring back the subject he gets a message :D
[22:01] <Darkside> i have done FM demodulation using CSDR.. let me dig up the commands i used
[22:03] <Darkside> cat %s | csdr shift_addition_cc -0.238947 | csdr fir_decimate_cc 20 0.005 HAMMING | csdr bandpass_fir_fft_cc -0.18 0.18 0.05 | csdr fmdemod_quadri_cf | csdr limit_ff | csdr convert_f_s16 | sox -t raw -r 48k -e signed-integer -b 16 -c 1 - -r 48000 -b 8 -t wav - | ./rs41ecc --ecc --ptu --crc
[22:03] <Darkside> oh hrm
[22:03] <Darkside> that was taking a file of floating point samples
[22:03] <Viproz> okay after some more testing my test was a bit crooked, if I use a bandwidth of 30kHz with no bandpass I get 10/16 decodes so not as bad, maybe my M10 had a big offset
[22:03] <Darkside> ahh
[22:03] <Darkside> annoying thing is, the rtl_sdr utility doesnt have an option to turn on the bias tee
[22:03] <Darkside> whereas rtl_fm does
[22:04] <Darkside> bit of an oversight there..
[22:04] <Darkside> cat rs41_960k_highsnr.bin | csdr convert_u8_f | csdr shift_addition_cc -0.238947 | csdr fir_decimate_cc 20 0.005 HAMMING | csdr bandpass_fir_fft_cc -0.18 0.18 0.05 | csdr fmdemod_quadri_cf | csdr limit_ff | csdr convert_f_s16 | sox -t raw -r 48k -e signed-integer -b 16 -c 1 - -r 48000 -b 8 -t wav - | ./rs41ecc --ecc --ptu --crc
[22:05] <Viproz> cat shortrecord.sdr | csdr convert_u8_f |csdr shift_addition_cc `python -c "print float(401500000-401000000)/2400000"` | csdr fir_decimate_cc 50 0.005 HAMMING | csdr bandpass_fir_fft_cc -0.25 0.25 0.05 | csdr fmdemod_quadri_cf | csdr limit_ff | csdr convert_f_u8 | sox -t raw -r 48000 -b 8 -e unsigned-integer - -t wav bandpass25.wav
[22:05] <Darkside> i wouldnt run the sdr at 2.4 mhz
[22:05] <Darkside> higher change of dropped samples
[22:05] <Darkside> id be dropping it right down
[22:06] <Darkside> ok i really need to get going
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[22:06] <Darkside> cya...
[22:06] <Viproz> cya, I'll write my findings
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[22:15] <SpacenearUS> New vehicle on the map: 03ICSPACE5 - 12https://tracker.habhub.org/#!qm=All&q=ICSPACE5
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[23:06] <SpacenearUS> New vehicle on the map: 03U3S28 - 12https://tracker.habhub.org/#!qm=All&q=U3S28
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[00:00] --- Fri Feb 8 2019