what do I need to do if/when I want to have several "antennas" for one "feeder"?
Here is the set-up I've been thinking:
Feeder host
- running fr24feed and feeding to FR24
- runs dump1090 (with --net-only if there is no DVB-T stick)
- can have a DVB-T stick
- just one per site
Antenna host
- does not run fr24feed
- has a DVB-T stick and runs dump1090
- 1-2 per site, different antenna configuration/location
The motivation is mainly to test new antennas without disturbing steady the feed to FR24.
I can have 1+2 hosts (all with DVB-T sticks) at home and 1+1 (both with DVB-T sticks) at the garage (different location, i.e. different feed with separate key).
My very first idea was to do this:
nc antennahostX 30002 | nc feederhost 30001
I was expecting that the number of total usable messages from the feeder is the sum of number of total usable messages from all the antennas, but this does not seem to be the case.
I have --stats-every 600 so I see the summary every 10 minutes, although the reporting periods are not exactly the same, it depends on when each dump1090 was started, but since I live in an area that does not have the sky full of flights all the time I can compare the number of messages somewhat accurately. Simplified example: one flight goes by, antenna1 has 3 messages, antenna2 has 4 messages, and the feeder (with it's own antenna) has 6 messages.
Many of the messages are (or at least should be) duplicates, does the feeder dump1090 ignore these (identical messages received about the same time)?
Or is this completely wrong? Is 30002/30001 the right port pair, or should I use 30005/30004? The fr24feed connects to 30003, which is BaseStation output port, but dump1090 does not have BaseStation input port.
-Paavo
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