Astronomy and Astrophysics – Astronomy
Scientific paper
May 2004
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004aas...204.1107d&link_type=abstract
American Astronomical Society Meeting 204, #11.07; Bulletin of the American Astronomical Society, Vol. 36, p.675
Astronomy and Astrophysics
Astronomy
Scientific paper
The Kepler Discovery Mission has been developed to monitor a large star field for four years and directly detect Earth-like planets through differential photometry. The mission is launched on a Delta II and flies in a heliocentric orbit. The 903-Kg flight segment consists of a CCD-based photometer instrument and a spacecraft bus. The spacecraft bus is at the base of the flight segment and provides structural support to the photometer. The spacecraft is 3-axis-stablized and uses fine guidance sensors to provide accurate pointing throughout the mission to better than 18.4 arcsec. Reaction wheels are used for attitude adjustments with a cold-gas reaction control system for wheel desaturations. Spacecraft thermal control is largely passive with some active heaters. The spacecraft avionics is based on redundant RAD 750 computers with a throughput of 119 MIPS. The power system produces 812 W EOL using a fixed solar array with a direct energy transfer architecture. Primary data downlink is via a Ka-band HGA to the DSN 34-m antennas.
Deininger William D.
Harvey A. C.
Miller Daniel D.
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