Selecting Pixels for Kepler Downlink

被引:32
作者
Bryson, Stephen T. [1 ]
Jenkins, Jon M. [2 ]
Klaus, Todd C.
Cote, Miles T. [1 ]
Quintana, Elisa V. [2 ]
Hall, Jennifer R. [3 ]
Ibrahim, Khadeejah [3 ]
Chandrasekaran, Hema [4 ]
Caldwell, Douglas A. [2 ]
Van Cleve, Jeffrey E.
Haas, Michael R. [1 ]
机构
[1] NASA, Ames Res Ctr, M-S 244-30, Moffett Field, CA 94305 USA
[2] NASA, Ames Res Ctr, SETI Inst, Moffett Field, CA 94305 USA
[3] NASA, Ames Res Ctr, Orbital Sci Corp, Stanford, CA 94305 USA
[4] Lawrence Livermore Natl Lab, Livermore, CA 94551 USA
来源
SOFTWARE AND CYBERINFRASTRUCTURE FOR ASTRONOMY | 2010年 / 7740卷
关键词
Kepler; exoplanet; transit; pixel selection; PERFORMANCE;
D O I
10.1117/12.857625
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
The Kepler mission monitors similar to 165, 000 stellar targets using 42 2200 x 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.
引用
收藏
页数:12
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