Mission type Communications
Operator Singapore Telecom
Chunghwa Telecom
COSPAR ID 1998-049A
SATCAT № 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 (1998-08-25T23:07Z) UTC[1]
Rocket Ariane 44P V109
Launch site Kourou ELA-2
Contractor Arianespace
Orbital parameters
Reference system Geocentric
Regime Geostationary
Longitude 88° east
Perigee 35,771 kilometres (22,227 mi)
Apogee 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 Indonesia to Malaysia 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 in now discussions for a new follow-on satellite that could be launched in 2010.[3]


  1. ^ McDowell, Jonathan. "Launch Log". Jonathan's Space Page. Retrieved 30 October 2013. 
  2. ^ "ST 1 Satellite details 1998-049A NORAD 25460". N2YO. 29 October 2013. Retrieved 30 October 2013. 
  3. ^