| Mission type | Communication |
|---|---|
| Operator | B-SAT |
| COSPAR ID | 2017-059B  |
| SATCAT no. | 42951 |
| Website | (Japanese) |
| Mission duration | 15 years (planned) |
| Spacecraft properties | |
| Spacecraft | BSAT-4a |
| Spacecraft type | BSAT |
| Bus | SSL 1300 |
| Manufacturer | Space Systems/Loral |
| 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 |
| Contractor | Arianespace |
| Orbital parameters | |
| Reference system | Geocentric orbit |
| Regime | Geostationary orbit |
| Longitude | 110.0° East (Planned) |
| Transponders | |
| Band | 24 Ku-band |
| Coverage area | Japan |
| B-SAT← BSAT-3cBSAT-4b → | |
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, to be stationed on the 110.0° East orbital slot for direct television broadcasting of 4K and 8K Ultra HD resolutions. It was launched on 29 September 2017.
Satellite description
BSAT-4a was designed and manufactured by SSL on the SSL 1300 satellite bus for BSAT. It has an estimated launch mass of 3,500 kilograms (7,700 lb) with a 15-year design life.
It has a single Ku-band payload with 24 transponders, and covers Japan with 4K and 8K Ultra HD television satellite service.
History
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 that 4K and 8K signals would be broadcast by summer 2020.
In September 2015, BSAT contracted Arianespace for an Ariane 5 ECA launch service,and received a preliminary license for broadcasting 4K and 8K Ultra HD.
References
- ^ Ariane 5 rocket deploys satellites for Intelsat and B-SAT
- ^ Krebs, Gunter Dirk (6 September 2016). "BSat 3a, 3b". Gunter's Space Page. Archived from the original on 9 September 2016. Retrieved 9 September 2016.
- ^ "放送衛星3機のスペック" [Specifications of the three broadcasting satellites] (in Japanese). Broadcasting Satellite System Corporation. Archived from the original on 9 September 2016. Retrieved 9 September 2016.
- ^ "Arianespace to launch BSAT-4a, marking its 30th commercial GEO satellite launch contract for Japan". 14 September 2015. Archived from the original on 9 September 2016. Retrieved 9 September 2016.
- Ford, Dominic (1 August 2018). "BSAT-4A". In-The-Sky.org.
- "SSL selected to provide direct broadcasting satellite to B-SAT". 18 June 2015. Archived from the original on 9 September 2016. Retrieved 9 September 2016.
- "Milestones". Archived from the original on 9 September 2016. Retrieved 9 September 2016.
| BSAT satellites | |
|---|---|