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MOS (Marine Observation Satellite)





Marine Observation Satellite (MOS)
Japan's first Earth resources satellites, also known by the national name Momo ("peach blossom"). MOS-1A and -1B, launched by NASDA (National Space Development Agency), monitored ocean currents and chlorophyll levels, sea surface temperature, atmospheric water vapor, precipitation, and land vegetation, and also acted as data relays for remote surface sensor platforms. Both measured 2.4 × 1.5 m and were launched from Tanegashima.


spacecraft launch date launch vehicle orbit mass (kg)
MOS-1A Feb. 19, 1987 N-2 907 × 909 km × 99.1° 745
MOS-1B Feb. 7, 1990 H-1 908 × 909 km × 99.1° 740


Related categories

   • JAPANESE SPACECRAFT
   • SATELLITES AND SPACE PROBES
   • JAPAN IN SPACE