PPM offset

Here is the output of the USER plus the initial portion of the data. There are thunderstorms right now so total aircraft is down a bit from the normal.

grep USER /etc/default/adsbexchange
USER="attic"
sudo journalctl -u adsbexchange-mlat --no-pager
-- Logs begin at Wed 2020-01-15 15:17:01 CST, end at Thu 2020-01-16 06:53:07 CST. --
Jan 15 15:17:09 piaware systemd[1]: Starting adsbexchange-mlat...
Jan 15 15:17:09 piaware systemd[1]: Started adsbexchange-mlat.
Jan 15 15:17:13 piaware adsbexchange-mlat[430]: Wed Jan 15 15:17:13 2020 mlat-client 0.2.10 starting up
Jan 15 15:17:13 piaware adsbexchange-mlat[430]: Wed Jan 15 15:17:13 2020 Listening for Basestation-format results connection on port 31003
Jan 15 15:17:13 piaware adsbexchange-mlat[430]: Wed Jan 15 15:17:13 2020 Connected to multilateration server at feed.adsbexchange.com:31090, handshaking
Jan 15 15:17:13 piaware adsbexchange-mlat[430]: Wed Jan 15 15:17:13 2020 Beast-format results connection with 127.0.0.1:30104: connection established
Jan 15 16:03:36 piaware adsbexchange-mlat[430]: Wed Jan 15 16:03:36 2020 Server says:
Jan 15 16:03:36 piaware adsbexchange-mlat[430]: In-development v2 server. Expect odd behaviour.
Jan 15 16:03:36 piaware adsbexchange-mlat[430]: The multilateration server source code is available under
Jan 15 16:03:36 piaware adsbexchange-mlat[430]: the terms of the Affero GPL (v3 or later). You may obtain
Jan 15 16:03:36 piaware adsbexchange-mlat[430]: a copy of this server's source code at the following
Jan 15 16:03:36 piaware adsbexchange-mlat[430]: location: https://github.com/mutability/mlat-server
Jan 15 16:03:36 piaware adsbexchange-mlat[430]: Wed Jan 15 16:03:36 2020 Handshake complete.
Jan 15 16:03:36 piaware adsbexchange-mlat[430]: Wed Jan 15 16:03:36 2020 Compression: zlib2
Jan 15 16:03:36 piaware adsbexchange-mlat[430]: Wed Jan 15 16:03:36 2020 UDP transport: disabled
Jan 15 16:03:36 piaware adsbexchange-mlat[430]: Wed Jan 15 16:03:36 2020 Split sync: disabled
Jan 15 16:03:36 piaware adsbexchange-mlat[430]: Wed Jan 15 16:03:36 2020 Input connected to 127.0.0.1:30005
Jan 15 16:03:36 piaware adsbexchange-mlat[430]: Wed Jan 15 16:03:36 2020 Input format changed to BEAST, 12MHz clock
Jan 15 16:18:15 piaware adsbexchange-mlat[430]: Wed Jan 15 16:18:15 2020 Receiver status: connected
Jan 15 16:18:15 piaware adsbexchange-mlat[430]: Wed Jan 15 16:18:15 2020 Server status: ready
Jan 15 16:18:15 piaware adsbexchange-mlat[430]: Wed Jan 15 16:18:15 2020 Receiver: 913.3 msg/s received 347.7 msg/s processed (38%)
Jan 15 16:18:15 piaware adsbexchange-mlat[430]: Wed Jan 15 16:18:15 2020 Server: 0.0 kB/s from server 3.5kB/s TCP to server 0.0kB/s UDP to server
Jan 15 16:18:15 piaware adsbexchange-mlat[430]: Wed Jan 15 16:18:15 2020 Results: 33.5 positions/minute
Jan 15 16:18:15 piaware adsbexchange-mlat[430]: Wed Jan 15 16:18:15 2020 Aircraft: 21 of 29 Mode S, 122 of 134 ADS-B used
Jan 15 16:33:15 piaware adsbexchange-mlat[430]: Wed Jan 15 16:33:15 2020 Receiver status: connected
Jan 15 16:33:15 piaware adsbexchange-mlat[430]: Wed Jan 15 16:33:15 2020 Server status: ready
Jan 15 16:33:15 piaware adsbexchange-mlat[430]: Wed Jan 15 16:33:15 2020 Receiver: 948.8 msg/s received 347.1 msg/s processed (37%)
Jan 15 16:33:15 piaware adsbexchange-mlat[430]: Wed Jan 15 16:33:15 2020 Server: 0.0 kB/s from server 3.6kB/s TCP to server 0.0kB/s UDP to server
Jan 15 16:33:15 piaware adsbexchange-mlat[430]: Wed Jan 15 16:33:15 2020 Results: 34.3 positions/minute
Jan 15 16:33:15 piaware adsbexchange-mlat[430]: Wed Jan 15 16:33:15 2020 Aircraft: 25 of 29 Mode S, 129 of 139 ADS-B used
Jan 15 16:48:15 piaware adsbexchange-mlat[430]: Wed Jan 15 16:48:15 2020 Receiver status: connected
Jan 15 16:48:15 piaware adsbexchange-mlat[430]: Wed Jan 15 16:48:15 2020 Server status: ready
Jan 15 16:48:15 piaware adsbexchange-mlat[430]: Wed Jan 15 16:48:15 2020 Receiver: 993.1 msg/s received 357.7 msg/s processed (36%)
Jan 15 16:48:15 piaware adsbexchange-mlat[430]: Wed Jan 15 16:48:15 2020 Server: 0.1 kB/s from server 3.7kB/s TCP to server 0.0kB/s UDP to server
Jan 15 16:48:15 piaware adsbexchange-mlat[430]: Wed Jan 15 16:48:15 2020 Results: 37.4 positions/minute
Jan 15 16:48:15 piaware adsbexchange-mlat[430]: Wed Jan 15 16:48:15 2020 Aircraft: 23 of 32 Mode S, 130 of 140 ADS-B used
Jan 15 17:03:15 piaware adsbexchange-mlat[430]: Wed Jan 15 17:03:15 2020 Receiver status: connected
Jan 15 17:03:15 piaware adsbexchange-mlat[430]: Wed Jan 15 17:03:15 2020 Server status: ready
Jan 15 17:03:15 piaware adsbexchange-mlat[430]: Wed Jan 15 17:03:15 2020 Receiver: 1143.5 msg/s received 383.8 msg/s processed (34%)
Jan 15 17:03:15 piaware adsbexchange-mlat[430]: Wed Jan 15 17:03:15 2020 Server: 0.1 kB/s from server 4.1kB/s TCP to server 0.0kB/s UDP to server
Jan 15 17:03:15 piaware adsbexchange-mlat[430]: Wed Jan 15 17:03:15 2020 Results: 54.5 positions/minute
Jan 15 17:03:15 piaware adsbexchange-mlat[430]: Wed Jan 15 17:03:15 2020 Aircraft: 28 of 32 Mode S, 158 of 163 ADS-B used
Jan 15 17:18:16 piaware adsbexchange-mlat[430]: Wed Jan 15 17:18:16 2020 Receiver status: connected
Jan 15 17:18:16 piaware adsbexchange-mlat[430]: Wed Jan 15 17:18:16 2020 Server status: ready
Jan 15 17:18:16 piaware adsbexchange-mlat[430]: Wed Jan 15 17:18:16 2020 Receiver: 1202.6 msg/s received 398.6 msg/s processed (33%)

 

Funny! I wonder if I can simply change the "USER" entry in /etc/default/adsbexchange and restart? I figured ADSBexchange would assign me something unique (like FA). I didn't give any thought to the name.

I changed the USER name and rebooted. The attic which was mine (2B) is now gone. After about 15 minutes there's nothing yet there with the new user name. The stats link for my UUID seems to be updating as expected.

 

Ah, our replies crossed. I made the change and rebooted. It took about 20 minutes but my new site name is on the list and unique and my PPM offsets are now generally only +/- 1. Thanks for cluing me in!