HADR (radar)

HADR (radar) on the Erbeskopf

HADR system in the Uedemer Hochwald near Xanten-Marienbaum

The HR-3000 radar device from the Hughes company used in NATO is named as HADR . The letters are short for Hughes Air Defense Radar . It is a 3D radar for use in an air defense network. The operational user in Germany is the Luftwaffe's operations command service . Other Luftwaffe radars are Medium Power Radar (until 2015), RRP 117 , GM 406F and RAT 31DL .

Technical specifications

This radar device was created from a ship radar . The range was achieved, for example, by connecting a further power amplifier ( Amplitron ) behind the existing power amplifier ( traveling wave tube ), which thus became a preamplifier. The Amplitron is switched off at close range and for high altitudes and the HADR only works with the traveling wave tube.

The antenna with the dimensions of 4.8 × 6 m is a passive serially fed phased array antenna , which consists of horizontal waveguide slot antennas . Slots are cut into the shorter side of the waveguide at a distance of about half the wavelength . A frequency change is complicated by the serial supply. Because the phase relationships between the individual slot antennas are frequency-dependent, the antenna will squint a little when the frequency changes. This error must be compensated for by the software.

The antenna systems are located under radomes with a diameter of approx. 12 m in order to minimize weather influences.

Technical data HADR
Frequency range	F band
Pulse repetition time	4 ms
Pulse repetition frequency	60 and 1420 Hz
Transmission time (PW)	96 and 36 µs
Reception time	<3 ms
Dead time	approx. 50 µs
Pulse power	> 1.5 MW
Average performance	> 32 kW
displayed distance	450 km
Distance resolution	150 m
Opening angle	0.1-1.7 °
Hit count	1-8
Antenna round trip time	12 s

Locations

In Germany, four devices are in use at four locations:

designation	Location	Insinuation
AbgTZug 241 (separate technical train 241)	Xanten ( Marienbaum ) municipality Uedem	EinsFüBer 2
AbgTZug 244	Aurich ( Brockzetel )	EinsFüBer 2
AbgTZug 246	Birkenfeld ( Erbeskopf )	EinsFüBer 2
AbgTZug 249	Meßstetten	EinsFüBer 2

Norway has another three devices, Malaysia one. A version of the HR-3000 is distributed under the name RSRP ( Radars for the Southern Region and Portugal ) in the Mediterranean region (Turkey, Greece, Italy and Portugal). The devices used in Portugal are installed in Foia, Montejunto and Pilar.

Individual evidence

1. ↑ http://www.radartutorial.eu/19.kartei/02.surv/karte003.de.html Radartutorial.eu
2. ^ Jane's Radar and Electronic Warfare Systems
3. ↑ http://www.emfa.pt/www/unidade-24-estacao-de-radar-n-1 Estrutura da Força Aérea - Estação de Radar Nº 1
4. ↑ http://www.emfa.pt/www/unidade-23-estacao-de-radar-n-3 Estrutura da Força Aérea - Estação de Radar Nº 3
5. ↑ http://www.emfa.pt/www/unidade-25-estacao-de-radar-n-2 Estrutura da Força Aérea - Estação de Radar Nº 2