MLAT Back-Feed Question

What image/dump1090 version?

 

The mlat results should only appear on your local map from dump1090.
But that's just the mlat results you take part in.

Those won't appear on your custom VRS feed.
MLAT aircraft will only be on the main global VRS, not the custom feeds.

 

That would need to be configured so your MLAT results appear there.
(normal custom feed setup)

You can check if mlat-client is connected here: https://adsbexchange.com/myip/

Or you can check your sync matrix: https://www.adsbexchange.com/active-feeds/

Note that MLAT isn't quite as stable and sometimes you won't get a connection.
That's normal it should connect eventually.
(UK MLAT is the exception i believe it's overloaded a bit so might not get a connection)

 

Default configuration of mlat-client

Code:

... --results beast,connect,127.0.0.1:30104 ...

and dump1090

Code:

... --net-bi-port 30004,30104 ...

It means that mlat-client is pushing results to dump1090 using port 30104 (aircrafts visible on local dump1090 map).
To make results available to VRS or any other software add at the end of mlat-client script (before done)

Code:

--results,beast,listen,31003

where 'beast' is data format and 31003 is port number.

 

The adsb exchange script doesn't use that configuration file.

MLAT results going to dump1090 will not be forwarded to adsb exchange or other feed services.

This is very much on purpose otherwise feed services would not know which aircraft are ADS-B and which are MLAT.

If there are custom feeds that have MLAT, then it's James doing some configuration server side.
You'll have to go through the forms for custom feeds most likely.

But that can take time and James is busy enough as it is.
I'd suggest looking at the global adsb exchange map for MLAT.

Or if you want to see your local mlat you can look at the local /dump1090-fa map on your pi.
Note that if you have flightaware mlat going as well that results of both will be shown.

 

Check your /home/pi/adsb-exchange/adsbexchange-mlat_maint.sh
it should look like (lat, lon, alt, user - your data)

Code:

#!/bin/sh
while true
  do
    sleep 30
    /usr/bin/mlat-client --input-type dump1090 --input-connect localhost:30005 --lat your.lat --lon your.lon --alt youralt --user yourusername --server feed.adsbexchange.com:31090 --no-udp --results beast,connect,localhost:30104
  done

This is only place you need to edit.