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JAS 1a, 1b, 2 (Fuji 1a, 1b, 2 / FO 12, 20, 29 / Fuji-OSCAR 12, 20, 29)


JAS (Japanese Amateur Satellite) was a series of Japanese Amateur Radio satellites.

The JAS satellites were developed and built by the Japan Amateur Radio League. The 26-sided polyhedral satellites weighted 50 kg and were powered by body mounted solar cells, which supplied 10 W. The satellite were 0.44 m in diameter, and 0.47 m long. A turnstile antenna ring at its base received signals and four transmitting antennas extended from the top.

JAS-1a or Fuji 1a was launched by the maiden two-stage H-1 (9 SO) launch vehicle from the Tanegashima Space Center of the National Space Development Agency of Japan. Its mission was to provide analog and digital international satellite communications for radio amateurs, to study satellite tracking and control techniques, and to confirm the on orbit functions of the on board transponder developed by the amateur radio transpose group. It was renamed Fuji-OSCAR 12 in orbit.

JAS-1b or Fuji 1b was launched by a 2-stage H-1 (9 SO) 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. It was renamed Fuji-OSCAR 20 in orbit.

JAS 2 or Fuji 2 was launched by an H-2 rocket, which also put ADEOS 1 into orbit. It was renamed Fuji-OSCAR 29 in orbit.

Nation: Japan
Type / Application: Amateur radio communication
Operator: Japan Amateur Radio League
Contractors: Japan Amateur Radio League
Equipment: Digital Transponder - Mode JD Analog Transponder - Mode JA, Beacon
Propulsion: None
Power: Solar cells, batteries
Mass: 50 kg (#2)
Satellite COSPAR Date LS Launch Vehicle Remarks
JAS 1a (Fuji 1, Fuji-OSCAR 12, FO 12) 1986-061B 12.08.1986 Ta LP-N H-1 (9 SO) with EGS, MABES
JAS 1b (Fuji 1b, Fuji-OSCAR 20, FO 20) 1990-013C 07.02.1990 Ta LP-N H-1 (9 SO) with MOS 1b, DEBUT
JAS 2 (Fuji 2, Fuji-OSCAR 29, FO 29) 1996-046B 17.08.1996 Ta YLP-1 H-2 with ADEOS 1

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