Tansei 1

Launch data:

Spacecraft data: Prime contractor   Platform   Operator   Mass at launch  63 kg Dry Mass   kg Basic shape  26-hedron in a sphere Dimension (m)  dia: 0.75m Equipment   Solar array   Stabilization   Propulsion   DC power   Design lifetime

Scientific Instruments:

• Telemetry transmitter
• Command receiver and decoder
• Magnetic tape-type data recorder, etc.
• Installed 6-reflection mirror on the satellite surface
• Carrying silver oxide–zinc battery as power supply

Decay:

Mission details:

• Objectives: Performance verification of M-4S rocket and, after insertion into orbit, research on space environment and satellite performance test.
• The signal of the first rotation after launch was received from 14:50:40 to 15:09:12, confirming that the satellite had entered into orbit. Thereafter, observation at Uchinoura continued until 15:00 (JST) on February 23 (96 rotations). During the period, all the onboard instruments, except for an instrument to check solar-battery performance, functioned normally. By replaying the data recorder 37 times, abundant data were retrieved including temperature of various parts of the satellite, power-supply voltage and current, satellite altitude and spin status, etc. Tests for telemetry and command systems were performed without problems. After analysis, it was confirmed that temperature and environment inside the satellite were properly maintained as expected and the attitude of the satellite was stable.