레이다 52년 된 지상배치 레이더를 퇴역시킨 네덜란드

[위종민]

네덜란드가 1971년에 설치된 니우 밀리겐의 Medium Power Radar를 퇴역시켰다고 4월 2일 발표했습니다. 7월 말까지 설치될 탈레스의 GM400α 레이더로 교체될 예정이며, 그 공백기간엔 나토의 란자3D 레이더가 대체 커버리지를 제공할 예정이라고 하네요. GM400α 레이더 역시 2026년에 헤르비넨의 새로운 레이더 기지에 SMART-L MM/F가 설치될 때까지 임시 대체 역할이고 SMART-L MM/F 설치 후에도 니우 밀리겐의 레이더 기지가 계속 운영될 지 여부는 불확실하다고 합니다. 

MPR은 톰슨 CSF제로 독일에도 1969년~1973년에 설치됐고 2013년~2015년에 GM403으로 교체됐다고 하네요. E/F밴드로 탐지거리는 480km, 빔폭은 0.45도, 1분에 6번 돌아가네요. 

https://www.janes.com/defence-news/netherlands-retires-52-year-old-air-surveillance-radar/

Netherlands retires 52-year-old air surveillance radar

Netherlands retires 52-year-old air surveillance radar

03 APRIL 2024

by Olivia Savage

The GM400α radar from Thales is replacing the MPR (pictured) in Nieuw Milligen while the new Herwijnen radar station is fitted with the long-range SMART-L Multi-Mission/Fixed system. (Netherlands Ministry of Defence )

The Royal Netherlands Air Force (RNLAF) has retired its 52-year-old Medium Power Radar (MPR) based in Nieuw Milligen, the Netherlands Ministry of Defence (MoD) announced on 2 April.

The MPR in Nieuw Milligen has been in service since 1971, supporting the RNLAF Nieuw Milligen air operations control station (AOCS) with air surveillance and early warning.

One of NATO's Lanza 3D Deployable Air Defence Radars (DADRs), developed by Indra, is providing basic coverage while the MPR system is replaced with the Ground Master 400 Alpha (GM400α) radar from Thales, due to be installed by the end of July.

The GM400α radar is also supposed to be a temporary replacement until the new radar station in Herwijnen is installed with the SMART-L Multi-Mission/Fixed (MM/F) radar. The MoD is unsure whether the Nieuw Milligen radar station will continue functioning once Herwijnen is operational from 2026.

https://www.radartutorial.eu/19.kartei/11.ancient/karte029.en.html

MPR

The MPR (Medium Power Radar, designated by its manufacturer as TRS 2201) was installed in Germany during 1969 to 1973. Manufacturer was Thomson CSF (France) using modules from AEG Telefunken and Siemens. It was in service to 2013 - 2015 and will be replaced by the Ground Master 403 (GM 403).

In 1979 was retrofitted: a Digital ECM-system and a radome. In 1982 was carried out an exchange of traveling wave tubes to solid-state RF preamplifiers.

The MPR is a fixed radar. The components are housed in a multi-storey building. All installed in Germany six devices were identical in the version using two transmitters.

A pulsed high power klystron produces a maximum output power of 20 MW in E/F-band This transmitter output stage is driven by a Carcinotron via two amplifier stages.

The transmitters pulse is splitted to a number of 34 feed horns in the antenna and then emitted. In each of the 34 feed horns there is a polarizer. This allows a linear, right or left circular polarization of the transmitted energy. The transmit pulse is emitted in a cosecant²- antenna pattern. In the receiving time, several feed horns are summarized and it is formed a stacked beam pattern consisting of 12 narrow beams. The sum of the 12 beams also yields a cosecant²- antenna pattern. These 12 beams are processed in independent receivers. In this manner one gets in addition to the azimuth and range data still an elevation angle information.

The receivers operate on the principle of double superheterodyne. The first intermediate frequency (IF) is 150 MHz, and the second IF is 30 MHz. Only the lower four channels are equipped with low-noise RF amplifiers. The slip-ring unit transfers only the second IFs from the antenna to the radar To protect against interference is used the “Dicke Fix”- processing into the IF-amplifier stage.

A 13th channel (SLB) serves to suppress unwanted side-lobes of the antenna. It uses the feed horn on the top of the parabolic reflector.

In the receiver, the signal is processed in two parallel signal paths:

• the CFAR path including interference suppression, and
• the log path with the true amplitude of the echo signals.

After an analog/digital conversion the target data is forwarded to the radar data processor.

Figure 1: Antenna of MPR without radome

Specifications

frequency:	E/F-band
pulse repetition time (PRT):	4 ms
pulse repetition frequency (PRF):	250 pps
pulsewidth (τ):	4 µs
receiving time:	3132 µs
dead time:	800 µs
peak power:	up to 20 MW
average power:	up to 40 kW
instrumented range:	480 km
range resolution:	600 m
accuracy:
beamwidth:	0.45°
hits per scan:	3
antenna rotation:	6 rpm
MTBCF:
MTTR:

북동쪽의 니우 밀리겐과 남서쪽의 헤르비넨의 위치. 60km 가량 떨어져 있음