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Post Info TOPIC: Skynet 5B satellite
Blobrana


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RE: Skynet 5B satellite
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The launch of  the  Skynet 5B satellite has been postponed again due to another technical fault on the launcher.
Tonights launch countdown sequence was  stopped several hours before lift-off.
A new launch date will be announced shortly.

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Blobrana


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Following the testing and replacement of an equipment component on the launch vehicle, Arianespace has authorised a restart of the final countdown for its mission with the Skynet 5B Star One C1 satellites.
 Liftoff of the Ariane 5 launcher is now set for the night of Monday, November 12 at the opening of the following launch window:

From 7:06 p.m. to 8:00 p.m., local time in Kourou, French Guiana
From 5:06 p.m. to 6:00 p.m. in Washington, D.C.
From 8:06 p.m. to 9:00 p.m. in Rio de Janeiro
From 10:06 p.m. to 11:00 p.m. GMT
From 11:06 p.m. to 00:00 a.m. in Paris.

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Blobrana


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"We are now taking the launch vehicle back to the Final Assembly Building where we will investigate the equipment and replace it."

The flight, originally timed for Friday night, is not now expected to take place until Monday at the earliest.

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Blobrana


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The launch of the latest satellite in the UK's £3.6bn Skynet project is postponed because of a fault on its rocket.

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Blobrana


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Star One C1 satellite
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Live webcast

The webcast starts about 20 minutes before the start  of the launch window.

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Blobrana


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RE: Skynet 5B satellite
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Arianespace will boost two satellites into orbit on its fifth launch of the year: the Skynet 5B military communications satellite for the British Ministry of Defence (MoD), through the Astrium company Paradigm and the Star One C1 commercial communications satellite for Brazilian operator Star One, as part of a turnkey contract with Thales Alenia Space.

Launch countdown and flight events
T minus 3 h 20 minutes Chilldown of Vulcain main stage engine
T minus 1 h 10 minutes Check of connections between launcher and telemetry, tracking and command systems
T minus 7 minutes 00 s All systems go report, allowing start of synchronised sequence
T minus 4 minutes 00 s Tanks pressurised for flight
T minus 1 minutes 00 s Switch to onboard power mode
- 05,5 s Command issued for opening of cryogenic arms
T minus 04 s Onboard systems take over
T minus 03 s Unlocking of guidance systems to flight mode
HO Ignition of the cryogenic main stage engine (EPC) ALT (km) V. rel. (m/s)
T plus  7,0 s Ignition of solid boosters 0 0
T plus  7,3 s Liftoff 0 0
T plus  12,5 s End of vertical climb and beginning of pitch rotation (10 seconds duration) 0.091 37
T plus  17 s Beginning of roll manoeuvre 0.332 74
T plus  2 minutes 19 s Jettisoning of solid boosters 65.5 1989
T plus  3 minutes 10 s Jettisoning of fairing 105.5 2206
T plus  7 minutes 29 s Acquisition by Natal tracking station 171.0 4945
T plus  8 minutes 58 s Shut-down of main cryogenic stage 168.0 6886
T plus  9 minutes 04 s Separation of main cryogenic stage 168.2 6912
T plus  9 minutes 08 s Ignition of upper cryogenic stage (ESC-A) 168.3 6914
T plus  13 minutes 39 s Acquisition by Ascension tracking station 155.3 7580
T plus  18 minutes 18 s Acquisition by Libreville tracking station 182.2 8312
T plus  23 minutes 18 s Acquisition by Malindi tracking station 437.8 9105
T plus  24 minutes 56 s Shut-down of ESC-A / Injection 626.1 9377
T plus  27 minutes 12 s Separation of SKYNET 5B satellite 958.1 9102
T plus  29 minutes 23 s Separation of Sylda 5 1348.4 8797
T plus  33 minutes 47 s Separation of STAR ONE C1 satellite 2292.6 8137
T plus  45 minutes 29 s End of Arianespace Flight mission 5223.1 6578


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Blobrana


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The UK is due to continue the upgrade to its military satellite communications system with the launch of a new spacecraft later.
The Skynet 5B platform will ride into orbit atop an Ariane 5 rocket from the Kourou spaceport, in French Guiana.
It will join the 5A satellite lofted successfully in March and which is already handling secure traffic for UK forces in Iraq and Afghanistan.

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Blobrana


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Star One C1 satellite
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The launch readiness review (RAL) took place in Kourou on Wednesday, November 7, 2007 and authorised count-down operations for the Skynet 5B & STAR ONE C1 launch.
On its fifth launch of the year Arianespace will boost two satellites into orbit: the Skynet 5B military communications satellite for the British Ministry of Defence (MoD) through the Astrium company Paradigm, and the Star One C1 commercial communications satellite for Brazilian operator Star One, as part of a turnkey contract with Thales Alenia Space.
They will be launched from the Ariane launch complex N° 3 (ELA3), in Kourou, French Guiana.

The ARIANE 5 "ECA" Launcher Lift-Off for this flight is scheduled during the night of November 9 to 10, 2007  within the following launch window:

GMT: Between 10:04 p.m. and 10:59 p.m. on November 9.
PARIS: Between 11:04 p.m. and 11:59 p.m. on November 9.
WASHINGTON: Between 05:04 p.m. and 05:59 p.m. on November 9.
KOUROU: Between 07:04 p.m. and 07:59 p.m. on November 9.
RIO DE JANEIRO: Between 08:04 p.m. and 08:59 p.m. on November 9.

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Blobrana


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RE: Skynet 5B satellite
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Astrium is on target for the second Skynet 5 satellite launch this year with Skynet 5B scheduled for launch from Kourou, French Guiana on 9 November 2007 on an Ariane 5 launch vehicle.
Astrium plays a triple role on the Skynet 5 programme responsible for the service provision through its company Paradigm, prime contractor on the launcher Ariane 5 and also as prime contractor for the satellites and associated ground segment.
A new era in secure military communications for the UK Ministry of Defence began when the Skynet 5A satellite entered service in April 2007 following successful launch from Kourou, French Guiana on 11 March 2007.
Skynet 5 is the groundbreaking next generation military satellite communications programme for the UK Ministry of Defence. Secure communications services are being delivered by the owner and operator, Paradigm, part of Astrium Services, with the system, including the satellites, designed and built by Astrium Satellites. Astrium Space Transportation is prime contractor on Ariane 5.

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Blobrana


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An Arianespace Ariane 5  rocket (Flight 179) with an ECA cryogenic upper stage is to to launch the British Skynet 5B military communications satellite and the Brazilian STAR ONE C1 telecommunications spacecraft, from launchpad ELA-3, in Kourou, French Guiana on November 9th, 2007.
The Brazilian STAR ONE C1 telecommunications spacecraft is based on Thales Alenia Space's Spacebus 3000 B3 platform, and carries 28 C-band transponders, 14 Ku-band transponders and 1 X-band transponder. It will have a mass at liftoff of 4,100 kg., and is to be positioned at 65° West after its deployment by Ariane 5.
The United Kingdom's Skynet 5B secure military communications satellite. Skynet 5B was delivered to the Spaceport in September, and is continuing the pre-launch preparation process. It will be the second Skynet 5-series spacecraft launched by Arianespace in 2007, following the orbiting of Skynet 5A on an Ariane 5 mission in March.
Skynet 5B, launched for spacecraft manufacturer EADS Astrium,  will provide an in-orbit delivery to Paradigm Secure Communications, a private company. Paradigm provides survivable, resilient and secure communications services to military and government users with the Skynet series of relay satellites.
Arianespace is targeting a total of six Ariane 5 flights in 2007.

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