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STRV 1A, 1B, 1C, 1D

STRV 1A & 1B [DRA]

STRV (Space Technology Research Vehicle) are experimental satellites procured for the UK Ministry of Defence by the Defence Research Agency (DRA) at Farnborough.

Launched on an Ariane-44LP H10+ on the 17th of June 1994, the two 52 kg micro-satellites built by the UK defence Research Agency (DRA) at Farnborough U.K., and are to evaluate new technologies in the harsh environment of a GTO orbit. The spacecraft are cubical in shape, with 450 mm sides. Experiments are carried from the Ballistic Missile Defence Organisation (BMDO), the European Space Agency (ESA), DRA, and various Universities.

The mission life-time is expected to be one year.


  • Xenon Plasma Charge Neutraliser (DRA)
  • Cold Ion Detector (DRA/MSSL)
  • Surface Charge Detector (DRA/SIL)
  • Langmuir Probe (DRA)
  • Cosmic Ray & Dosimetry monitor (DRA/UKAEA)
  • Battery Recharge (ESA-ESTEC)
  • Radiation Dose Rate Sensor (DRA/MMS)
  • Atomic Oxygen Effects (DRA/U.of Southampton)


  • Cryo-cooler / Vibration Suppression (BMDO/JPL)
  • Infra-red Detectors (BMDO/JPL)
  • SEU / radiation monitor (BMDO/JPL)
  • Neural Network Microprocessors (BMDO/JPL)
  • Radiation Environment Monitor (ESA-ESTEC/PSI)
  • Solar Cell Technology (DRA/SSTL)

During their planned operational life, the STRV satellites were operated from the DRA Lasham groundstation in the UK, using a 12 m tracking dish. Later the satellite control was turned over to the University of Colorado.

Follow on mission are planned. STRV-1c and 1d were launched on the Ariane-5G ASAP.

Nation: UK
Type / Application: Technology
Operator: DRA, BMDO, ESA
Contractors: Defence Evaluation and Research Agency (DERA)
Propulsion: Xe cold gas thrusters
Power: Solar cells, batteries
Mass: 52 kg (#1, 2); 104 kg (#1C); 102 kg (#1D)
Orbit: GTO
Satellite COSPAR Date LS Launch Vehicle Remarks
STRV 1A 1994-034B 17.06.1994 Ko ELA-2 Ariane-44LP H10+ with Intelsat 702, STRV1 B
STRV 1B 1994-034C 17.06.1994 Ko ELA-2 Ariane-44LP H10+ with Intelsat 702, STRV 1A
STRV 1C 2000-072C 16.11.2000 Ko ELA-3 Ariane-5G with PAS 1R, AMSAT P3D, STRV 1D
STRV 1D 2000-072D 16.11.2000 Ko ELA-3 Ariane-5G with PAS 1R, AMSAT P3D, STRV 1C

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