Japan’s First Scientific Satellite “SHINSEI” aims to conduct observation of ionosphere, cosmic rays, shortwave band solar noise, etc. This is first scientific satellite in Japan.

Name (pre-launch in parentheses) SHINSEI (MS-F2)
International Designation code 1971-080A
Objectives Observation of ionosphere, cosmic rays, shortwave band solar noise, etc.
Launch Date 13:00, September 28, 1971 (JST)
Launch Location Kagoshima Space Center (Uchinoura)
Launch Vehicle M-4S-3
Weight 66kg
Shape 26-hedron in a sphere with a 75cm diameter
Orbital Altitude Perigee 870 km, Apogee 1,870 km
Orbital Inclination 32°
Type of orbit Elliptical
Orbital Period 113 min
Scientific Instruments ・Shortwave band solar radio monitor (RN)
・Cosmic ray monitor (CR)
・Ionosphere plasma monitor (ID)
・Geomagnetism attitude system (GAS)
・In-satellite environment monitor (HK)
・Telemetry transmitter (TM-SA)
・Data recorder (DR)
・Command receiver (CM-SA)
・Power supply (PS)
・Satellite timer (MS-SA)
・Nutation damper (ND)
End of Operation June 1973
Operation After insertion into orbit, Uchinoura received signals to confirm the ionosphere plasma probe deployment, solar-radio antenna extension, and nutation damper operation, and the satellite began operating. The electron-temperature probe was damaged immediately after the satellite was exposed to space and one of the CR's Geiger counters malfunctioned. All other instruments operated normally.
Results Three onboard instruments found abnormal ionization around South America and solar-radio observation revealed the generation mechanism of shortwave-band solar-radio waves.