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They do dump1090-mutability as well as options for dump978 and other feed sites.
20 minutes to do the whole lot.
cat /tmp/piaware.out again to check for any MLAT errors
you can also try
cat /var/log/dump1090-mutability.log
You can also set your timezone here.
flightaware.com/account/manage
Then some of the graphs will be in local time, not UTC/GMT.
If you can get MLAT to work, you will see many more aircraft.
For me, it is about 60% of my traffic.