Radartutorial .euHADR
Figure 1: HADR radar under a radome
Hughes Air Defense Radar
The HADR primary radar operates over a bandwidth greater than 12 per cent. The radar achieves a detection range of at least 320 km for a 1 m² target. The instrumented range coverage is 500 km. Versatile computer control enables radar coverage to 30,000 m Altitude and up to 24° elevation.
The HADR antenna subsystem is a phased array. The transmitter is an amplitron driven by a TWT. In the short range mode the amplitron is switched off and the TWT- driver works as high power amplifier.
The Secondary Surveillance Radar (SSR) subsystem was the version D14 of the German
„Siemens 1990” until December 2006. Now the radar has been updated to the new
MSSR 2000 I
using the ICAO standard Mark XII.
Four HADR systems are operational in Germany, two used in conjunction with
the NATO Air Defence Ground Environment (NADGE), and known as GEADGE (German ADGE).
| Specifications | |
|---|---|
| frequency: | F-Band |
| pulse repetition time (PRT): | 4 Milliseconds |
| pulse repetition frequency (PRF): | 60 - 1430 Hertzes |
| pulsewidth (PW): | 96 / 36 Microseconds |
| receive time: | < 3 Milliseconds |
| dead time: | approximately 50 Microseconds |
| peak power: | > 1.5 megawatts |
| average power: | < 32 kilowatts |
| displayed range: | 240 nautical miles |
| range resolution: | 450 ft |
| beamwidth: | 1.1° - 1.7° |
| hits per scan: | 1 - 8 |
| antenna rotation: | 12 Seconds |