| Mission type | Communications |
|---|---|
| Operator | Singapore Telecom Chunghwa Telecom |
| COSPAR ID | 1998-049A  |
| SATCAT no. | 25460 |
| Mission duration | 13 years |
| Spacecraft properties | |
| Bus | Eurostar-2000+ |
| Manufacturer | Matra Marconi |
| Launch mass | 3,200 kilograms (7,100 lb) |
| Start of mission | |
| Launch date | 25 August 1998, 23:07 (1998-08-25UTC23:07Z) UTC[1] |
| Rocket | Ariane 44P V109 |
| Launch site | Kourou ELA-2 |
| Contractor | Arianespace |
| Orbital parameters | |
| Reference system | Geocentric |
| Regime | Geostationary |
| Longitude | 88° east |
| Perigee altitude | 35,771 kilometres (22,227 mi) |
| Apogee altitude | 35,813 kilometres (22,253 mi) |
| Inclination | 1.83 degrees |
| Period | 23.93 hours |
| Epoch | 29 October 2013, 18:16:49 UTC[2] |
ST-1 is a communications satellite owned by Singapore Telecom and Taiwan's Chunghwa Telecom Company, Ltd. It was placed launched on 25 August 1998, by an Ariane 4 rocket. The two companies jointly operate the spacecraft from control centres located in Seletar, Singapore and Taipei, Taiwan, respectively.
ST-1 carries 16 high-power Ku band transponders and 14 medium-power C-band transponders. Weighing over 3,000 kg (6,600 lb.) at launch, ST-1 generates more than 6,500 watts of electrical power. The satellite's broad C-band coverage beam extends from the Middle East to Japan, including all of Southeast Asia.
ST-1 also features two Ku-band spot beams: a "K1" beam that stretches from Taiwan to Singapore and from IndonesiatoMalaysia and a "K2" beam centred over the Indian subcontinent. The ST-1 satellite currently delivers telephony, digital DTH broadcasting, VSAT and other business services throughout the region.
Singapore Telecom and Taiwan's Chunghwa Telecom Company are currently operating the replacement satellite ST-2 after ST-1 has reached its mission duration in 2011.
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