United Kingdom and Geophysics Research

STRV The June, 1994, launches of the STRV 1A and 1B (Space Technology Research Vehicles) spacecraft marked the first time in 10 years (AMPTE) that the UK had long-lived geophysics satellites in Earth orbit. Although developed by Defense Research Agency as a technology testbed, the STRV program provided an opportunity of acquiring valuable information on the near-Earth radiation and particulate environment. The two spacecraft were inserted in highly elliptical orbits of approximately 280 km by 35,850 km at 7 degree inclinationas piggyback payloads on an Ariane mission. The 50-kg spacecraft with dimensions of 0.4 m by 0.5 m by 0.5 m were equipped with gallium-arsenide solar cells for a beginning of life power level of 30 W. STRV 1A carried cosmic ray sensors (CREDO, Cosmic Ray Effects and Dosimeter), while STRV 1B hosted a UK radiation and proton detector (RADMON, Radiation Monitor) and an ESA radiation environment monitor (REM) for charged particles (References 79-81).

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