Selecting pixels for Kepler downlink

Details Selecting pixels for Kepler downlink Selecting pixels for Kepler downlink

Jul 2010

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010spie.7740e..46b&link_type=abstract

Software and Cyberinfrastructure for Astronomy. Edited by Radziwill, Nicole M.; Bridger, Alan. Proceedings of the SPIE, Volume 7

Astronomy and Astrophysics

Astronomy

3

Scientific paper

The Kepler mission monitors ~ 165, 000 stellar targets using 42 2200 × 1024 pixel CCDs. Onboard storage and bandwidth constraints prevent the storage and downlink of all 96 million pixels per 30-minute cadence, so the Kepler spacecraft downlinks a specified collection of pixels for each target. These pixels are selected by considering the object brightness, background and the signal-to-noise in each pixel, and maximizing the signal-to- noise ratio of the target. This paper describes pixel selection, creation of spacecraft apertures that efficiently capture selected pixels, and aperture assignment to a target. Engineering apertures, short-cadence targets and custom-specified shapes are discussed.

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