|Launch mass||3.5 t (3.4 long tons; 3.9 short tons)|
|Start of mission|
|Launch date||29 September 2017 21:56 UTC|
|Rocket||Ariane 5 ECA|
|Launch site||Guiana Space Center ELA-3|
|Longitude||110° East (Planned)|
|Band||24 Ku band|
BSAT-4a, is a geostationary communications satellite ordered by B-SAT and designed and manufactured by SSL on the SSL 1300 platform. It is expected to be stationed on the 110° East orbital slot for direct television broadcasting of 4K and 8K Ultra HD resolutions.
On June 18, 2015, B-SAT ordered the first of its fourth generation satellites from SSL, BSAT-4a. It was expected to be weight around 3.5 t (3.9 tons), have 24 Ku band transponders with a 15-year design life. It was launched on September 29, 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 September 14 of the same year, B-SAT contracted Arianespace for an Ariane 5 ECA launch service. During the same month of September B-SAT received a preliminary license for broadcasting 4K and 8K Ultra HD.