Please make a donation to support Gunter's Space Page.
Thank you very much for visiting Gunter's Space Page. I hope that this site is useful and informative for you.
If you appreciate the information provided on this site, please consider supporting my work by making a simple and secure donation via PayPal. Please help to run the website and keep everything free of charge. Thank you very much.

BS 3a, 3b, 3n (Yuri 3a, 3b, 3n)

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
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
Further BS missions: