GOCE-European science satellite launch delayed until at least February


The Russian authorities responsible for the Rockot launcher that shall carry ESA’s GOCE Earth Explorer satellite into orbit have completed the investigation of a failure in the guidance and navigation system of the launcher’s Upper Stage (Breeze KM).
The anomaly was discovered during the spacecraft’s launch preparation tests on 7 September 2008 in Plesetsk, which subsequently led to the postponement of the launch.
The cause of the anomaly in the guidance and navigation system has meanwhile been identified and reproduced. The necessary hardware changes will require a minimum of two months of additional work by the manufacturer.
As a consequence, the launch of GOCE cannot take place earlier than February 2009; however, the exact launch date will only be decided at a later stage once the corrective measures have been fully implemented and validated.

The much-delayed launch of a European satellite designed to monitor Earth’s gravitational field is unlikely to take place before February, the European Space Agency (ESA) said on Friday.

The Gravity field and state-steady Ocean Circulation Explorer, or GOCE, should have been launched on September 10 from the Plesetsk cosmodrome 800 kilometres (500 miles) north of Moscow.

The operation has been postponed several times, after a problem was identified in the guidance and navigation subsystem in the launcher’s upper stage, called the Breeze KM.

“The necessary hardware changes will require a minimum of two months of additional work by the manufacturer,” ESA said in a press release here.

“As a consequence, the launch of GOCE cannot take place earlier than February 2009; however, the exact launch date will only be decided at a later stage once the corrective measures have been fully implemented and validated.”

GOCE is part of ESA’s “Earth Explorer” programme, initiated in 1999, to deepen understanding about some of the fundamentals of the planet — its atmosphere, oceans, biosphere and interior.

The satellite’s launcher is a Rockot, a derivative of a Russian intercontinental ballistic missile operated by a joint venture between EADS Astrium and the Khrunichev Space Centre.

Source ESA



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