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JAS-1B (Japanese Amateur Radio Satellite) was launched by the same 2-stage H-1 rocket that launched MOS-1B. It succeeded JAS 1 (Oscar 12), Japan's first communications satellite linking amateur radio operators. JAS-1B operated as a store and forward message service. Uplink frequency was 144 MHz; downlink was 435 MHz. The satellite, deployed by the Japan Amateur Radio League, was 0.44 m in diameter, and 0.47 m long. A turnstile antenna ring at its base received signals and 4 transmitting antennas extended from the top. Body mounted solar cells supplied 10 W. The national name of this satellite is Fuji-2 meaning "wisteria" in Japanese.

Alternate Names

  • 20480
  • FUJI-2
  • Japan Amateur Sat-1B
  • Oscar 20

Facts in Brief

Launch Date: 1990-02-07
Launch Vehicle: H-1
Launch Site: Tanegashima, Japan
Mass: 50 kg

Funding Agency

  • Unknown (Japan)


  • Communications

Additional Information

Questions and comments about this spacecraft can be directed to: Coordinated Request and User Support Office

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