The GERB De-Scan Mechanism - lubricant solution development and in-orbit performance

Details The GERB De-Scan Mechanism - lubricant solution development and in-orbit performance The GERB De-Scan Mechanism - lubricant solution development and in-orbit performance

Sep 2003

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003esasp.524...57s&link_type=abstract

In: Proceedings of the 10th European Space Mechanisms and Tribology Symposium, 24-26 September 2003, San Sebastián, Spain. Compi

Computer Science

Performance

Tribology

Scientific paper

The GERB instruments fly on the MSG series of satellites and are designed to measure the Earth Radiation Budget (ERB). Several ERB satellites have been flown in low earth orbit, but this type of measurement has not been achieved before from geostationary orbit. It is expected that these measurements will make a major contribution to the understanding of our climate system and to the changes occurring in the average temperature of the Earth. MSG is a spinning platform and this raised many challenges for the design and testing of the mechanisms, significantly a constant acceleration of 16g throughout the 7 year mission life for the GERB instrument. MSG1 was launched in August 2002 and a significant amount of mechanism performance data is now becoming available. This paper briefly describes the instrument and the two mechanisms, which form a crucial part of it, the Quartz- Filter and De-Scan Mechanisms. The lubrication requirements for the latter were extremely demanding, as the mission lifetime is equivalent to 200 million revs. A detailed discussion of the extensive bearing testing carried out in order to develop and demonstrate the suitability of the selected lubricant solution is presented, together with in-orbit mechanism performance data which covers the initial commissioning activities.

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