From Wikipedia, the free encyclopedia
Eutelsat 33B
, formerly known as
Eutelsat 3F1
,
Eutelsat W1
,
Eutelsat W5
,
Eutelsat 70A
and
Eutelsat 25C
, is a
telecommunications
satellite owned by Eutelsat Consortium.
[2]
Eutelsat W5 provides coverage to Europe,
Middle East
, and Asia. The satellite can use either six steerable beams or two fixed beams to provide the coverage.
Satellite description
[
edit
]
Eutelsat W1 was built by
Aerospatiale
and is a
Spacebus-3000B2
satellite.
[2]
The satellite measures 4.6 m × 2.5 m × 1.8 m (15.1 ft × 8.2 ft × 5.9 ft) and has a span of 29 m (95 ft) on orbit. Eutelsat W1 features
three axis stabilization
to help keep it stable and pointed at the
Earth
at all times. It features twenty-four
K
u
band
transponders
. It was used to provide video distribution and contribution links, occasional-use video as well as Internet backbone connections.
[3]
Eutelsat W5
[
edit
]
The original
Eutelsat W1
satellite was damaged during construction by a malfunctioning fire extinguishing system. 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]
It was declared a total loss, but was later reconstructed and completed as
Eutelsat W5
.
[4]
Eutelsat 70A
[
edit
]
Eutelsat 70A
was the first satellite to be launched by a
Delta IV
launch vehicle
. The launch was originally scheduled for January 2001, but was delayed several times due to developmental problems with the Delta IV. 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.
[5]
On 16 June 2008, a power generation anomaly occurred and four transponders were permanently lost. It was later revealed that one of the two solar panels was lost because the array's drive motor failed.
[2]
Eutelsat 25C
[
edit
]
In 2013, it was replaced by
Eutelsat 70B
at 70° East
[3]
and was then moved to 25° East where it was renamed to
Eutelsat 25C
.
[6]
Eutelsat 33 B
[
edit
]
In October 2015,
Eutelsat 33B
was deactivated because of the loss of its second solar panel.
[7]
References
[
edit
]
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January
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February
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March
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April
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May
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June
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July
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August
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September
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October
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November
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December
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- TDRS-10
- Hot Bird 7
,
Stentor
,
MFD-A
,
MFD-B
- ADEOS II
,
Kanta Kun
,
FedSat
,
μ-LabSat 1
(
RITE 1
,
RITE 2
)
- NSS-6
- TrailBlazer-2001 STA
,
Saudisat 1C
,
LatinSat A
,
LatinSat B
,
UniSat 2
,
Rubin 2
- Kosmos 2393
- Kosmos 2394
,
Kosmos 2395
,
Kosmos 2396
- Shenzhou 4
- Nimiq 2
|
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Launches are separated by dots ( ? ), payloads by commas ( , ), multiple names for the same satellite by slashes ( / ).
Crewed flights
are underlined. Launch failures are marked with the † sign. Payloads deployed from other spacecraft are (enclosed in parentheses).
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