An overview of Soho 12 years after

Details An overview of Soho 12 years after An overview of Soho 12 years after

Dec 2008

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008lnea....3..213g&link_type=abstract

Lecture Notes and Essays in Astrophysics, vol. 3. Proceedings of the 3rd Symposium of the Astrophysics Group of the Spanish Roya

Physics

Solar Energetic Particles, Soho Satellite, Solar Physics, Solar Terrestrial Physics.

Scientific paper

The Solar and Heliospheric Observatory SOHO was launched on 1995 December 2 and completed launch and early orbit activities (commissioning) in 1996 March, reaching its L1 halo orbit. The control of the spacecraft was lost in 1998 June, and only restored three months later through the heroic efforts of an ESANASA- contractor-university team. All twelve scientific instruments were still usable, most with no ill effects. Despite the immediate failure of two of the three onboard gyroscopes and the later demise of the third (in 1998 December), by 1999 February, new, gyroless, onboard control software not only allowed the spacecraft to return to full scientific usefulness, but actually provided a greater margin of safety for spacecraft operations. SOHOs current margins for thruster propellant and solar panel output are considered by spacecraft engineers to be adequate to extend its operational live longer than 2010. Some of the scientifics insights from SOHO and scientific topics for future are reviewed in the following lines.

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