Ground Master 400

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Ground Master 400
Country of origin  France
Introduced 2008
Number built 47
Type Digital 3D AESA
Frequency S band
RPM 10
Range 390 km (240 mi)
Altitude 30,500 m (100,100 ft)
Azimuth 360º
Elevation 20° and 40°
Precision 50 m (160 ft)

The Ground Master 400 is a mobile radar system manufactured by ThalesRaytheonSystems.[1] GM 400 is a fully digital 3D active electronically scanned array long-range air defense radar, offering detection from very high to very low altitudes. It tracks a wide range of targets from highly maneuverable tactical aircraft flying below several hundred feet to the unconventional small radar crossection devices, such as UAVs or cruise missiles

The system can be set up by a four-man crew in 30 minutes and can be remotely operated. The system fits in a 20-foot shipping container and weighs less than ten tons. The system can be rapidly deployed mounted on a 6x6 or 8x8 tactical truck and can be transported by a single C-130 aircraft or a helicopter.[2]

The GM 400 has been selected to protect the European Space Agency's Guiana Space Centre. The system will be operational by the end of 2012.[3]

Main characteristics[edit]

  • Air Surveillance Radar
  • Crew: 4
  • S-band, 3D AESA Radar
  • 10 RPM Rotation Rate
  • High-altitude, long-range air defense sensor
  • Detects fixed- and rotary-wing aircraft, cruise missiles, UAVs, and tactical ballistic missiles
  • Coverage:
    • Azimuth: 360°
    • Elevation: 20° and 40°
  • Performance:
    • Detection range: 5 to 390 km
    • Max detection rate in altitude: 30.5 km
    • Instrumented range: 470 km
  • High mobility, transportability, and reliability
  • Operating modes:
    • Digital Beam Forming mode
    • Stacked beam (maximum time on target)
    • S-Band (high part 2.9 / 3.3 GHz)
    • 2 Doppler modes
    • Electronic Counter-CounterMeasures (ECCM) capabilities
    • Tactical ballistic missile (TBM) detection capability.


See Also[edit]


  1. ^ Defence Update: Finland Selects Norwegian/U.S. NASAMS for SA-11 Replacement
  2. ^ Deagel: Ground Master 400
  3. ^ Thales Group
  4. ^ a b c d e f g h i Radar Tutorial
  5. ^ Finnish Defence Forces' webpage
  6. ^