highaltitude.log.20191104

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[03:46] <SpacenearUS> New vehicle on the map: 03VK5HS_chase - 12https://tracker.habhub.org/#!qm=All&q=VK5HS_chase
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[11:09] <SpacenearUS> New position from 03ICT3 after 0317 hours silence - 12https://tracker.habhub.org/#!qm=All&q=ICT3
[11:24] <SpacenearUS> New position from 03N2NXZ/AM after 0317 hours silence - 12https://tracker.habhub.org/#!qm=All&q=N2NXZ%2FAM
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[11:45] <SpacenearUS> New position from 03W8MV-11 after 032 days silence - 12https://tracker.habhub.org/#!qm=All&q=W8MV-11
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[13:31] <SpacenearUS> New position from 03KN4IUD-15 after 0319 hours silence - 12https://tracker.habhub.org/#!qm=All&q=KN4IUD-15
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[14:50] <SpacenearUS> New vehicle on the map: 03ZS6gc_chase - 12https://tracker.habhub.org/#!qm=All&q=ZS6gc_chase
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[15:57] <SpacenearUS> New vehicle on the map: 03IT9YBG-11 - 12https://tracker.habhub.org/#!qm=All&q=IT9YBG-11
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[16:06] <SpacenearUS> New position from 03KA6TVU-12 after 03a month silence - 12https://tracker.habhub.org/#!qm=All&q=KA6TVU-12
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[17:25] <SpacenearUS> New vehicle on the map: 03N9RZR-12 - 12https://tracker.habhub.org/#!qm=All&q=N9RZR-12
[17:46] <SpacenearUS> New vehicle on the map: 03KB3ZOW-11 - 12https://tracker.habhub.org/#!qm=All&q=KB3ZOW-11
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[19:32] <nickoe> hi
[19:32] <nickoe> Why does using the device_idx not work for me here? http://dpaste.com/2XVMMCR.txt
[19:33] <nickoe> I have two different serials
[19:33] <nickoe> and I think I configured it correctly on the station.cfg
[19:33] <nickoe> use one dongle, use idx 1
[19:33] <nickoe> PE2BZ: ^
[19:33] <nickoe> Darkside: or maybe you have an idea.
[19:34] <nickoe> master branch, v20180601-523-gd37b1b3
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[19:46] <nickoe> device_idx = 1
[19:53] <nickoe> I have tested that I can receive with two instances of gqrx at the same time
[19:54] <nickoe> it looks as if the samplerate is not the same https://i.snipboard.io/yWXVfD.jpg
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[20:06] <SpacenearUS> New vehicle on the map: 03G7HFS_chase - 12https://tracker.habhub.org/#!qm=All&q=G7HFS_chase
[20:07] <SM0ULC-David> test
[20:08] <SM0ULC-David> can you paste the entire section for sdr1 ?
[20:09] <SM0ULC-David> also i remember reading somehwere srn 00000001 is no good
[20:11] <SM0ULC-David> "WARNING: If running multiple RTLSDRs, do not use serial numbers 0, 1, or '00000001'. This can lead to rtl_test getting confused and trying to test incorrect SDRs, leading to odd behaviour. It is strongly suggested you program your RTLSDR serial numbers to '00000002', '00000003', etc..."
[20:11] <SM0ULC-David> https://github.com/projecthorus/radiosonde_auto_rx/wiki/Configuration-Settings
[20:33] <nickoe> oh, ok, I will try that
[20:40] <nickoe> SM0ULC-David: http://dpaste.com/3E4G5EQ
[20:40] <nickoe> it still does not work
[20:40] <nickoe> http://dpaste.com/0D07DEV.txt
[20:40] <nickoe> the serials are now the 000...2 and 3
[20:47] <SM0ULC-David> mm
[20:48] <SM0ULC-David> ah
[20:48] <SM0ULC-David> device_idx = 00000003
[20:48] <SM0ULC-David> should work fine
[20:54] <nickoe> SM0ULC-David: ohhhhhh, indeed it does.
[20:54] <nickoe> Thanks!
[20:54] <SM0ULC-David> and if i may.. the gain is very low i think
[20:55] <nickoe> I have an lna in front at the antenna
[20:55] <SM0ULC-David> what kind of dongle is it? antenna?
[20:55] <SM0ULC-David> aaah
[20:55] <nickoe> rtl-sdr.com v3
[20:55] <SM0ULC-David> coo
[20:55] <SM0ULC-David> l
[20:55] <SM0ULC-David> happy hunting :)
[20:56] <nickoe> it looks like this http://69.nickdebug.dk:8081/
[20:56] <SM0ULC-David> have a rpi with 2x dongles and one yagi & omni-antenna, have to do some specials to get both scanning
[20:56] <nickoe> I think I could optimize by tuning the antenna for 401 MHz, but now it is tuned for 437 MHz
[20:56] <SM0ULC-David> aah, Ålborg! :)
[20:57] <nickoe> but I got a couple of packets from a RS41 in 30km somwhere around Osterburg in germany
[20:57] <SIbot> In real units: 41 in = 1 m
[20:57] <nickoe> ...
[20:57] <nickoe> 3 mil
[20:58] <nickoe> SIbot: !!!
[20:58] <SM0ULC-David> yeah, and the landscape is pretty flat also
[20:58] <nickoe> yes
[20:58] <nickoe> not like the mountain things you have
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[20:59] <SM0ULC-David> yeah, i live on a hillside.. some 20m to the top but some 10 meters above the flats to the east.. so no sondes or other stuff to the east... :/
[21:00] <nickoe> go to the top!
[21:01] <SM0ULC-David> yeah, have some small plans to place some remote box
[21:04] <SM0ULC-David> also, play with the snr threshold and blacklist fqs with continous interference
[21:07] <Darkside> i wouldnt adjust the SNR threshold too much
[21:08] <Darkside> as none fo the modems will reliably decode far below where it's currently set anyway
[21:08] <SM0ULC-David> ah
[21:08] <nickoe> I just tuned a bit in gqrx to see where the interference spikes were not too severe but yet would see some gaint on other signals.
[21:09] <nickoe> I think my monitor is pretty noisy, at least of them, I turned that off to be able to use it.
[21:09] <SM0ULC-David> does this work? http://privetove.asuscomm.com:9005/
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[21:10] <Darkside> aslso yes, that gain setting is fairly low
[21:10] <Darkside> you are likely completely negating any noise figure improvements from the LNA
[21:10] <Darkside> however, if you are limited by noise from the local environment instead of limited by thermal noise, then it might not atter anyway
[21:13] <nickoe> It is a but hard to test, the weather is not that nice
[21:13] <nickoe> And I don't think I have a proper environment to test it in lab
[21:15] <nickoe> I do have a programmable attenuator thing from work, dunno if it works, but probably. I assuem it were made for 2.4GHz or GPS frequences, but I assume it will be ok for 400 MHz
[21:17] <Darkside> not sure what you're testing with that?
[21:18] <Darkside> the point is that system noise figure depends mostly on the first decide in the RX Chain (i.e. your LNA), however if you start adding attenuation (i.e. reducing gain on your RTLSDR), you can end up negating the noise figure improvements
[21:18] <Darkside> but it might not mater if you are limited by external noise anyway
[21:18] <Darkside> in my chase car i just leave the sdr on AGC and it seems to work OK...
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[21:25] <SM0ULC-David> i'll maybe try and add a bpf for 400-406
[21:25] <SM0ULC-David> quite a lot of tetra and stuff in nearby fqs
[21:29] Nick change: Viproz__ -> Viproz
[21:31] <nickoe> Darkside: yeah, I had it on AGC with the ebay dongle as well, but for the RTL sdr.com one it was not really good. there were only spurs, ALL OVER
[21:32] <nickoe> SM0ULC-David: yeah, a BPF would probably also improve things
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[22:10] <SpacenearUS> New vehicle on the map: 0314004_chase - 12https://tracker.habhub.org/#!qm=All&q=14004_chase
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[22:52] <SpacenearUS> New position from 03HSAB_TEST after 036 days silence - 12https://tracker.habhub.org/#!qm=All&q=HSAB_TEST
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[00:00] --- Tue Nov 5 2019