Eutelsat W5

Eutelsat W5

Artist rendering of the Eutelsat satellite
Operator Eutelsat
Major contractors Aérospatiale (with DASA, Alenia & SS/L)
Bus Spacebus-3000B2
Mission type Telecommunications
Launch date 20 Nov 2002
Launch vehicle Delta IV
Launch site CCAFS SLC37B
Mission duration 12 years
COSPAR ID 2002-051A
Homepage http://www.eutelsat.com/satellites/705e_w5.html
Mass
  • Dry: 1,400 kg (3,100 lb)
    *Launch: 3,170 kg (7,000 lb)
    *In orbit: 1,900 kg (4,200 lb)
Power End Of Life: 5900 W
Orbital elements
Regime Geostationary
Apoapsis 22,245 miles (35,800 km)
Periapsis 22,237 miles (35,787 km)
Orbital period 1,436.50 min
Longitude 70.5° E
Transponders
Transponders 24 Ku band
Coverage area Western Europe, Central Asia and India
References: [1][2][3]

Eutelsat W5 (also known as Eutelsat 3F1 or Eutelsat W1) is a telecommunications satellite owned by Eutelsat Consortium.[1] Eutelsat W5 provides coverage to Western Europe, Central Asia, the Middle East. The satellite can use either 6 steerable beams or 2 fixed beams to provide the coverage. Eutelsat W5 was used to provide video distribution and contribution links, occasional-use video as well as Internet backbone connections.[2]

Eutelsat W5 was the first satellite to be launched by a Delta IV rocket. The launch was originally scheduled for January 2001, but was delayed several times due to developmental problems with the Delta IV rocket.

Specifications

Eutelsat W5 was built by Aérospatiale and is a spacebus 3000 satellite.[1] The satellite measures 4.6 m (15 ft) x 2.5 m (8.2 ft) x 1.8 m (5.9 ft) and has a span of 29 m (95 ft) on orbit. Eutelsat W5 features 3 axis stabilization to help keep it stable and pointed at the earth at all times. It features 24 Ku band transponders.

Problems

Eutelsat W5 has suffered numerous problems. The first was during testing, when the factory where it was being built caught fire. The cause of the fire was determined to be a carbon fiber wall which got too hot when the antennas were pointed at it and turned up on full power. The satellite was covered in water causing extensive damage.[1]

On 27 March 2007, Eutelsat W5 began drifting west at a rate of 0.004° per day. It is not known why this began to happen.[3]

On 16 June 2008, a power generation anomaly occurred and 4 transponders were permanently lost. It was later revealed that 1 of the 2 solar panels was lost (the array's drive motor failed).[1]

References

  1. ^ a b c d e "TSE - Eutelsat W5". The Satellite Encyclopedia. http://www.tbs-satellite.com/tse/online/sat_eutelsat_3f5.html. Retrieved 2010-02-26. 
  2. ^ a b "W5: 70.5". Eutelsat.com. http://www.eutelsat.com/satellites/705e_w5.html. Retrieved 2010-02-26. 
  3. ^ a b "Spacebus 3000". Astronautix. http://www.astronautix.com/craft/spas3000.htm. Retrieved 2010-02-26.