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BSat 4a, 4b

BSat 4a [SSL]

BSat 4a is broadcasting satellite for Broadcasting Satellite System Corporation (B-SAT). The satellite will be used for Direct-to-Home (DTH) television service in Japan.

Space Systems/Loral (SSL) got the contract to build the BSat 4a satellite in June 2015.

BSAT-4a will have 24 Ku-band transponders and will expand the availability of advanced television services such as high definition and 4K/8K ultra-high definition television. BSAT-4a is based on the highly reliable SSL-1300 platform, which provides high power and the flexibility to support a broad range of applications and technology advances. The satellite is designed to provide service for 15 years or more.

A second satellite, BSat 4b was ordered in March 2018.

Nation: Japan
Type / Application: Communication
Operator: Broadcasting Satellite System Corporation (B-SAT)
Contractors: Space Systems/Loral (SS/L) (#4a); Maxar Technologies (formerly Space Systems/Loral (SS/L)) (#4b)
Equipment: 24 Ku-band transponders
Configuration: SSL-1300
Propulsion: ?
Power: 2 deployable solar arrays, batteries
Lifetime: 15 years
Mass: 3520 kg (#1); 3530 kg (#2)
Orbit: GEO
Satellite COSPAR Date LS Launch Vehicle Remarks
BSat 4a 2017-059B 29.09.2017 Ko ELA-3 Ariane-5ECA with Intelsat 37e
BSat 4b 2020-056A 15.08.2020 Ko ELA-3 Ariane-5ECA+ with Galaxy 30, MEV 2


Further BSat missions:

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