Cosmic Ray Rejection and the Next Generation Space Telescope

Details Cosmic Ray Rejection and the Next Generation Space Telescope Cosmic Ray Rejection and the Next Generation Space Telescope

May 1999

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999aas...194.4401o&link_type=abstract

American Astronomical Society, 194th AAS Meeting, #44.01; Bulletin of the American Astronomical Society, Vol. 31, p.884

Computer Science

Performance

Scientific paper

We propose a method for identifying and removing cosmic rays from the NGST data. The NGST instrumentation design team anticipates non-destructive-read capability for the detectors. We utilize this capability to perform an up-the-ramp observation sequence, which we analyze to identify and remove cosmic rays from the data. This strategy provides near-optimal signal-to-noise performance while removing cosmic ray contamination and providing a method for detecting saturation. We demonstrate our method for identifying and removing cosmic rays on simulated NGST data (with over 95% accuracy) and compare our results and data quality with those of alternative processing methods. We also discuss the implications for performing cosmic ray rejection on-board the NGST versus doing so after downlink. This study is supported by the NASA Remote Exploration and Experimentation Project (REE), which is administered at the Jet Propulsion Laboratory.

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