Airscatter.dk is the website for the HAM radio based network.
Ham radio operators inside EU joined together and made it possible to support the data used by airscatter users in softwares like AirScout made by DL2ALF.
We made this possible to join all the feeds within a few months.
When donating you are supporting the monthly costs running the servers in a high quality.
The feeders are having accounts free of charge and ordinary users can pay the yearly donation.