that’s true - no planes/no sites = no data on your servers i just came from my situation here in bavaria/germany and overlooked this aspect that in other regions of the world theses problems exist.
the feeder-sites map in the earlier version some years ago i found a little bit better to use. but yes this is a quite good indicator where problems with missing sites are. the coverage map over here isn’t very helpful - see picture. maybe an slider-option for 5000-10000 and 0-5000 would improve.
but with improving i not only meant to just get mlat position but to improve speed of first computed position and precision especially for aircrafts that maneuver hard.
but to be clear - i’m really happy with how fa-mlat today works - even so it would be nice for watching the small private aircrafts, sailplanes and military jets one little ‘bug’ regarding this where are sites near me i found. i like to see where other sites are located - but had to set mine to 10 km range because 1km and 5km both pointed directly to my house within 100 meters or so. the algorithm here should get improved a little as others now are copletely misled where my site is.