ESA - GOCE - GOCE's electric ion propulsion engine switched on

GOCE at a glance

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Danilo Muzi, Project Manager Rune Floberghagen, Mission Manager Reiner Rummel, Chairman Mission Advisory Group Mark Drinkwater, Mission Scientist Roger Haagmans, Mission Scientist Andrea Allasio, Thales Alenia Space Project Manager Michael Fehringer, System Manager Paolo Laberinti, Head of Verification and Testing Miguel Aguirre, Technical Officer for Definition Phase Daniel Lamarre, Gradiometer Engineer Juan Piñeiro, Spacecraft Operations Manager Stefano Capitanio, Launch Campaign Manager Pascal Gilles, Head of Earth Explorer Payload Data Ground Segment

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GOCE's electric ion propulsion engine switched on

6 April 2009

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The need for GOCE to fly in a low orbit means it has to compensate for the atmospheric drag it experiences at this exceptionally low altitude. The animation shows a close-up of the ion-propulsion assembly, which keeps the satellite in a smooth trajectory – free from all effects except those of gravity itself. Two winglets provide additional aerodynamic stability.

Credits: ESA /AOES Medialab

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View in ESOC's Main Control Room

Credits: ESA

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GOCE is a sleek five metre-long satellite about one metre in diameter. It consists of a central octagonal tube with seven internal 'floors' that support the equipment and electronic units. The satellite is built largely of carbon-fibre reinforced plastic sandwich panels to guarantee stable conditions and minimise mass. Forming the heart of the satellite, the gradiometer is mounted close to the satellite’s centre of mass. The gradiometer structure is based on ultra-stable carbon-carbon technology. GOCE is the first mission to employ the concept of gradiometry in space.

Credits: ESA–AOES-Medialab

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