The TPY-4 from Lockheed Martin is a RADAR System with Azimuth Range 0.20 to 0.25 Degree, Elevation Range 6 to 90 Degree (Track), -6 to 38 Degree (Search), Frequency 1215 to 1400 MHz, Range 555 to 1000 km. Tags: Software Defined Radar (SDR). More details for TPY-4 can be seen below.