#rtl1090 — Public Fediverse posts
Live and recent posts from across the Fediverse tagged #rtl1090, aggregated by home.social.
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CW: Cacky radio reception. Don't hate me
#dump1090 #ADSB #rtl1090
Yesterday a v4 RTL-SDR arrived and I plugged it in to my vintage (2011) imac running Debian Bookworm.Unusually, I read the RTL-SDRv4 quick start guide, compiled and installed modules etc. 🙂
Results of putting the little dipole on top of my shed roof, ends 275mm apart, vertical orientation, center tap skywards:
Statistics: Wed Mar 20 08:18:07 2024 AEDT - Wed Mar 20 09:18:07 2024 AEDT
Local receiver:
8640266240 samples processed
0 samples dropped
0 Mode A/C messages received
3258882 Mode-S message preambles received
1015775 with bad message format or invalid CRC
2180640 with unrecognized ICAO address
58857 accepted with correct CRC
3610 accepted with 1-bit error repaired
-42.5 dBFS noise power
-23.2 dBFS mean signal power
-3.7 dBFS peak signal power
0 messages with signal power above -3dBFS
Messages from network clients:
<snip (there's none)>
62467 total usable messages
0 surface position messages received
10065 airborne position messages received
9531 global CPR attempts with valid positions
<snip>Does that look OK to any RF wire benders out there? I don't mean *optimal*, I mean; I haven't even troubled gaffer tape, wire or a hot glue gun yet, what I mean is, *good-enough*. WHY so many errors and lost messages? It seems wasteful.
Summary is 3 million preambles, but only 62 thousand usable ones? That's not right, ... is it? -
CW: Cacky radio reception. Don't hate me
#dump1090 #ADSB #rtl1090
Yesterday a v4 RTL-SDR arrived and I plugged it in to my vintage (2011) imac running Debian Bookworm.Unusually, I read the RTL-SDRv4 quick start guide, compiled and installed modules etc. 🙂
Results of putting the little dipole on top of my shed roof, ends 275mm apart, vertical orientation, center tap skywards:
Statistics: Wed Mar 20 08:18:07 2024 AEDT - Wed Mar 20 09:18:07 2024 AEDT
Local receiver:
8640266240 samples processed
0 samples dropped
0 Mode A/C messages received
3258882 Mode-S message preambles received
1015775 with bad message format or invalid CRC
2180640 with unrecognized ICAO address
58857 accepted with correct CRC
3610 accepted with 1-bit error repaired
-42.5 dBFS noise power
-23.2 dBFS mean signal power
-3.7 dBFS peak signal power
0 messages with signal power above -3dBFS
Messages from network clients:
<snip (there's none)>
62467 total usable messages
0 surface position messages received
10065 airborne position messages received
9531 global CPR attempts with valid positions
<snip>Does that look OK to any RF wire benders out there? I don't mean *optimal*, I mean; I haven't even troubled gaffer tape, wire or a hot glue gun yet, what I mean is, *good-enough*. WHY so many errors and lost messages? It seems wasteful.
Summary is 3 million preambles, but only 62 thousand usable ones? That's not right, ... is it? -
CW: Cacky radio reception. Don't hate me
#dump1090 #ADSB #rtl1090
Yesterday a v4 RTL-SDR arrived and I plugged it in to my vintage (2011) imac running Debian Bookworm.Unusually, I read the RTL-SDRv4 quick start guide, compiled and installed modules etc. 🙂
Results of putting the little dipole on top of my shed roof, ends 275mm apart, vertical orientation, center tap skywards:
Statistics: Wed Mar 20 08:18:07 2024 AEDT - Wed Mar 20 09:18:07 2024 AEDT
Local receiver:
8640266240 samples processed
0 samples dropped
0 Mode A/C messages received
3258882 Mode-S message preambles received
1015775 with bad message format or invalid CRC
2180640 with unrecognized ICAO address
58857 accepted with correct CRC
3610 accepted with 1-bit error repaired
-42.5 dBFS noise power
-23.2 dBFS mean signal power
-3.7 dBFS peak signal power
0 messages with signal power above -3dBFS
Messages from network clients:
<snip (there's none)>
62467 total usable messages
0 surface position messages received
10065 airborne position messages received
9531 global CPR attempts with valid positions
<snip>Does that look OK to any RF wire benders out there? I don't mean *optimal*, I mean; I haven't even troubled gaffer tape, wire or a hot glue gun yet, what I mean is, *good-enough*. WHY so many errors and lost messages? It seems wasteful.
Summary is 3 million preambles, but only 62 thousand usable ones? That's not right, ... is it? -
@blinry also fun for:
- picking up pager messages (if anyone nearby uses them). In the UK they're still used in hospitals and, bizarrely, by bird watchers
- getting aircraft transponder data, interesting if you live near an airport #rtl1090
- building a radio telescope! https://www.rtl-sdr.com/rtl-sdr-for-budget-radio-astronomy/