|Mission duration||15 years (planned)|
|Launch mass||3500 kg|
|Start of mission|
|Launch date||29 September 2017, 21:56 UTC|
|Rocket||Ariane 5 ECA|
|Launch site||Guiana Space Center ELA-3|
|Reference system||Geocentric orbit|
|Longitude||110.0° East (Planned)|
BSAT-4a is a geostationary communications satellite ordered by Broadcasting Satellite System Corporation (BSAT) and designed and manufactured by SSL on the SSL 1300 platform. It is expected to be stationed on the 110.0° East orbital slot for direct television broadcasting of 4K and 8K Ultra HD resolutions.
On 18 June 2015, BSAT ordered the first of its fourth generation satellites from SSL, BSAT-4a. It was expected to be weight around 3,500 kilograms (7,700 lb), have 24 Ku-band transponders with a 15-year design life. It was launched on 29 September 2017. It was planned, too, that commercial broadcasting of 4K and 8K signals would begin, and have full broadcast of Tokyo 2020 Olympics with that resolution.
On 14 September 2015 of the same year, BSAT contracted Arianespace for an Ariane 5 ECA launch service. During the same month of September BSAT received a preliminary license for broadcasting 4K and 8K Ultra HD.