BSAT-2a

BSAT-2a

Mission type	Communication
Operator	B-SAT
COSPAR ID	2001-011B[1]
SATCAT №	26720
Spacecraft properties
Spacecraft	BSAT-2a
Bus	STAR-1[2]
Manufacturer	Orbital Sciences Corporation
Launch mass	1,317 kg (2,903 lb)
Dry mass	535 kg (1,179 lb)
Dimensions	3.76 m × 2.49 m × 2.03 m (12.3 ft × 8.2 ft × 6.7 ft)
Power	2.6 kW
Start of mission
Launch date	22:51, March 8, 2001[3]
Rocket	Ariane 5G V-140
Launch site	Guiana Space Center ELA-3
Contractor	Arianespace
Entered service	April 26, 2001
End of mission
Disposal	Placed in a graveyard orbit
Deactivated	January 2013
Orbital parameters
Reference system	Geocentric
Regime	Graveyard orbit[4]
Semi-major axis	42,474 km
Perigee	36,069.5 km
Apogee	36,137.2 km
Inclination	3.4°
Period	1,451.9 minutes
Epoch	00:00:00 UTC 2016-09-07
Transponders
Band	4 (plus 4 spares) Ku band
TWTA power	130 Watts
B-SAT ← BSAT-1b BSAT-2b →

BSAT-2a, was a geostationary communications satellite operated by B-SAT which was designed and manufactured by Orbital Sciences Corporation on the STAR-1 platform. It was stationed on the 110° East orbital slot along its companion BSAT-2c from where they provided redundant high definition direct television broadcastin across Japan.^[5][6][7]

Satellite description

BSAT-2a was designed and manufactured by Orbital Sciences Corporation on the STAR-1 satellite bus for B-SAT. It had a launch mass of 1,317 kg (2,903 lb), a dry mass of 535 kg (1,179 lb), and a 10-year design life.^[8] As all four STAR-1 satellites, it had a solid rocket Star 30CBP apogee kick motor for orbit raising, plus 200 kg (440 lb) of propellant for its liquid propellant station keeping thrusters.^[6][2][9][9]

It measured 3.76 m × 2.49 m × 2.03 m (12.3 ft × 8.2 ft × 6.7 ft) when stowed for launch. Its dual wing solar panels can generate 2.6 kW of power at the beginning of its design life, and span 16.10 m (52.8 ft) when fully deployed.^[8]

It has a single K_u band payload with four active transponders plus four spares with a TWTA output power of 130 Watts.^[5][8]

History

On March 1999, B-SAT ordered from Orbital Sciences Corporation two satellites based on the STAR-1 platform: BSAT-2a and BSAT-2b.^[10] This was the second order of the bus and the first since Orbital had acquired CTA Space Systems, the original developer.^[2]

BSAT-2a was launched aboard an Ariane 5G at 22:51 UTC, March 8, 2001 from Guiana Space Center ELA-3.^[11] It rode on the lower berth below Eurobird. In April 26, BSAT-2a was commissioned into service starting the broadcast of digital signals.^[3][10]

B-SAT ended the broadcast of analog television in July 2011. During January 2013, BSAT-2a was sent to a graveyard orbit and decommissioned.^[10][5]

References

1. "BSAT 2A". NASA Space Science Data Coordinated Archive. 27 April 2016. Retrieved 2016-09-07.
2. Richmond, Christopher W. (2008). "The Growth of Orbital Sciences and the Market for Small GEO Satellites" (PDF). Space Japan Review (English version). AIAA JFSC (55). Archived from the original (PDF) on 2016-09-06. Retrieved 2016-09-06.
3. "BSAT 2A". NASA Space Science Data Coordinated Archive. 27 April 2016. Retrieved 2016-09-07.
4. "BSAT-2A". n2yo.com. Retrieved 2016-09-07.
5. "BSAT-2 Series" (PDF). Orbital ATK. 2015. Archived from the original (PDF) on 2016-09-06. Retrieved 2016-09-06.
6. Krebs, Gunter Dirk (2016-04-17). "BSat 2a, 2b". Gunter's Space Page. Retrieved 2016-08-29.
7. "BSat 2A". Satbeams. Retrieved 2016-09-07.
8. "Launch Kit V-140" (PDF). Arianespace. May 22, 2001. Archived from the original (PDF) on 2007-09-27. Retrieved 2016-09-06.
9. Wade, Mark. "Star Bus". Astronautix.com. Encyclopaedia Astronautica. Retrieved 2016-09-07.
10. "沿革" [History]. Broadcasting Satellite System Corporation. Retrieved 2016-09-07.
11. Ray, Justin (March 8, 2001). "Arianespace launches first Ariane 5 rocket of 2001". Space Flight Now. Retrieved 2016-09-08.