Wide area multilateration demonstration system

The Radar Research Group of the Budapest University of Technology and Economics has been developing a distributed passive radar system. Multilateration principle is used to locate aircraft in the zone defined by the location of the receivers. This position estimation method is based on accurate time measurement. The current system uses the signaling of the secondary surveillance radar, specifically the signals emitted by the onboard transponders. As the receivers are far from each other, GPS based synchronization method was developed to maintain the accurate timing at each site. The developed radar system is now capable of simultaneously tracking multiple civilian aircrafts.