According to this page you have many ADS-B feeds coming in from central Europe: http://flightaware.com/adsb/coverage
Yet when you go to view the live data for flights over central Europe (like Germany), most of them are “Estimated”. (e.g. http://flightaware.com/live/airport/EDDH)
Where is the ADS-B data that you are collecting? Why is that not showing up on the website? What is the point of even collecting it when they are not being shown?