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LAUNCH PAD
Assembled and poised for launch: Soyuz is ready with its two Galileo navigation satellites
by Staff Writers
Kourou, French Guiana (SPX) Oct 10, 2012


illustration only

Arianespace's next medium-lift Soyuz is now fully assembled in the launch zone for its upcoming Spaceport mission, ready for the final steps leading to a Friday afternoon liftoff from French Guiana with two Galileo navigation satellites.

This flight is designated VS03 in Arianespace's mission numbering system, and it will be the Spaceport's third launch since Soyuz was introduced at this near-equatorial facility one year ago.

The VS03 Soyuz carries a second pair of Galileo In-Orbit Validation (IOV) satellites, which are to join the first two spacecraft orbited by Arianespace's historic VS01 flight on October 21, 2011, marking Soyuz' introduction at the Spaceport. Once all four are operational in space, they will provide the minimum number of satellites required for navigational fixes - enabling system validation testing when all are visible in the sky.

For this latest Arianespace mission, the basic three-stage Soyuz vehicle was transferred yesterday from its MIK assembly facility to the ELS launch zone. This process used the traditional horizontal rollout procedures employed in some 1,790 flights of the Russian-produced Soyuz family from Baikonur Cosmodrome in Kazakhstan and Plesetsk Cosmodrome in Russia.

In procedures that are specific to the Spaceport's processing flow, Soyuz was transferred without its payload. After the vehicle was raised vertically over the launch pad, a purpose-built 52-meter-tall mobile gantry moved into position around the Soyuz - providing a protected working environment for yesterday evening's integration of the launcher's payload fairing, which contains the two Galileo satellites as well as the Fregat upper stage.

This vertical procedure enables payloads to be installed as traditionally performed with Western launch systems - including the heavy-lift Ariane 5 and light-lift Vega members of Arianespace's launcher family.

The VS03 launch is scheduled exactly at 3:15:01 p.m. local time in French Guiana on October 12, with the mission lasting just under 3 hours, 45 minutes. During this period, the Fregat upper stage is to perform two propulsive burns - positioning the Galileo satellites for their deployment into a circular medium-Earth orbit of 23,222 km., inclined 55.345 deg.

As a European initiative, the Galileo satellite navigation system is being developed in a collaborative effort of the European Union and the European Space Agency. The In-Orbit Validation (IOV) satellites weigh 700 kg. each and were built by a consortium led by the Astrium division of EADS - which produced the platforms and has responsibility for the payloads; while Thales Alenia Space handled the assembly and testing tasks.

Total payload lift performance for the VS03 flight is 1,580 kg., which includes the two spacecraft, their dual-payload dispenser and other integration hardware.

The VS03 mission continues a busy year of activity for Arianespace, during which it already has performed five heavy-lift Ariane 5 flights from the Spaceport (orbiting eight telecommunications relay platforms and one Automated Transfer Vehicle for International Space Station servicing); along with a Soyuz mission from Baikonur Cosmodrome, conducted by the company's Starsem division to loft a European weather satellite.

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LAUNCH PAD
Ariane 5 maintains Arianespace's track record of success with the launch of ASTRA 2F and GSAT-10
Kourou, French Guiana (ESA) Oct 01, 2012
The fifth Ariane 5 mission of 2012 delivered a pair of telecommunications spacecraft to geostationary transfer orbit Friday, marking the 65th launch to date for Arianespace's heavy-lift workhorse. Lifting off in late afternoon sunlight at 6:18 p.m. from the Spaceport in French Guiana, Ariane 5 deployed its ASTRA 2F and GSAT-10 satellite passengers during a flight lasting 30 minutes. ... read more


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