BS 3a (Yuri 3a) [NASDA]
The BS-3 or Yuri 3 satellites were a series of Japanese direct broadcasting satellites.
The BS-3 were launched to replace the broadcasting serices of the BS-2, responding to growing broadcasting needs while developing technologies for more advanced broadcasting satellites. They were used for broadcasting and test broadcasting with high-definition television. In 1993, the program was spun off from NASDA to the Broadcasting Satellite System Corporation of Tokyo (B-SAT).
The satellites were based on GE Astro's AS-3000 bus and carried a NEC built broadcasting payload consisting of three active high power Ku-band transponders with three spares.
BS-3a, renamed Yuri 3a, was launched on 28 August 1990 on a Japanese H-1 UM-129A (9 SO) rocket. BS-3a finished its programmed operation on 20 April 1998.
BS-3b, renamed Yuri 3b, was launched about one year later on 25 August 1991 on a Japanese H-1 UM-129A (9 SO) rocket. BS-3b finished its programmed operation on 1 December 1998.
BS-3n or Yuri 3n, was launched on 8 July 1994 on a shared Ariane-44L H10+ launch.
The successor of these satellites were B-Sat's BSat 1a and 1b satellites.
Nation: | Japan |
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Type / Application: | Communication |
Operator: | NASDA (#3a, 3b); Broadcasting Satellite System Corporation of Tokyo (B-SAT) (#3n) |
Contractors: | NEC, RCA Astro → GE Astro → Martin Marietta (Bus) |
Equipment: | 3 (+3) Ku-band transponders 120W TWTA, 27 MHz bandwidth, EIRP max 54 dBW |
Configuration: | AS-3000 |
Propulsion: | Star-30BP (#3n) |
Power: | 2 deployable solar arrays, batteries |
Lifetime: | |
Mass: | 1100 kg (#3a, 3b) |
Orbit: | GEO |
Satellite | COSPAR | Date | LS | Launch Vehicle | Remarks | |
---|---|---|---|---|---|---|
BS 3a (Yuri 3a) | 1990-077A | 28.08.1990 | Ta LP-N | H-1 UM-129A (9 SO) | ||
BS 3b (Yuri 3b) | 1991-060A | 25.08.1991 | Ta LP-N | H-1 UM-129A (9 SO) | ||
BS 3n (Yuri 3n) | 1994-040B | 08.07.1994 | Ko ELA-2 | Ariane-44L H10+ | with PAS 2 |