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Eutelsat 33B, formerly known as Eutelsat W5, Eutelsat 3F1, Eutelsat W1, Eutelsat 70A and Eutelsat 25C, is a telecommunications satellite owned by Eutelsat Consortium.[2] 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 70A was used to provide video distribution and contribution links, occasional-use video as well as Internet backbone connections.[3]

Eutelsat 33B
NamesEutelsat W1 (pre-launch)
Eutelsat W5 (2002-12)
Eutelsat 70A (2012-13)
Eutelsat 25C (2013-14)
Eutelsat 33B (2014—)
Mission typeTelecommunications
OperatorEutelsat
COSPAR ID2002-051A
SATCAT no.27554
Websitewww.eutelsat.com/satellites/EUTELSAT-70A.html
Mission duration12 years
Spacecraft properties
BusSpacebus-3000B2
ManufacturerAérospatiale (with DASA, Alenia & SSL (Space Systems/Loral))
Launch mass3,170 kilograms (6,990 lb)
BOL mass1,900 kilograms (4,200 lb)
Dry mass1,400 kilograms (3,100 lb)
Power5,900 watts
Start of mission
Launch date20 November 2002, 22:39:00 (2002-11-20UTC22:39Z) UTC
RocketDelta IV-M+(4,2)
Launch siteCape Canaveral SLC-37B
ContractorBoeing
Orbital parameters
Reference systemGeocentric
RegimeGeostationary
Perigee altitude35,783 kilometres (22,235 mi)
Apogee altitude35,796 kilometres (22,243 mi)
Inclination0.11 degrees
Period1,436.24 minutes
Epoch4 December 2002[1]
Transponders
Band24 Ku band
Coverage areaWestern Europe
Central Asia
India
 

Eutelsat 70A 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.

SpecificationsEdit

Eutelsat 70A was built by Aérospatiale and is a Spacebus 3000 satellite.[2] 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 70A features 3 axis stabilization to help keep it stable and pointed at the earth at all times. It features 24 Ku band transponders.

ProblemsEdit

Eutelsat 70A 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.[2]

On 27 March 2007, Eutelsat 70A began drifting west at a rate of 0.004° per day. It is not known why this began to happen.[4]

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).[2]

In 2013 it was replaced by Eutelsat 70B at 70E [3] and was then moved to 25E where it was renamed to Eutelsat 25C.[5]

In October 2015, Eutelsat 33B was deactivated because of the loss of its second solar panel.[6]

ReferencesEdit

  1. ^ McDowell, Jonathan. "SATCAT". Jonathan's Space Pages. Retrieved 3 May 2018.
  2. ^ a b c d "TSE - Eutelsat W5". The Satellite Encyclopedia. Retrieved 2010-02-26.
  3. ^ a b "W5: 70.5". Eutelsat.com. Retrieved 2010-02-26.
  4. ^ "Spacebus 3000". Astronautix. Retrieved 2010-02-26.
  5. ^ "Eutelsat 25C". Eutelsat.com. Archived from the original on 2013-05-31. Retrieved 2013-05-14.
  6. ^ "CHIFFRE D'AFFAIRES DU PREMIER TRIMESTRE 2015-16. CROISSANCE DE 2,0% A TAUX DE CHANGE CONSTANT" [SALES OF THE FIRST QUARTER 2015-16. GROWTH OF 2.0% AT CONSTANT EXCHANGE RATE]. Archived from the original on April 1, 2016.