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.
|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|
|Power:||2 deployable solar arrays, batteries|
|Mass:||1100 kg (#3a, 3b)|
|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|