AAS Meeting #194 - Chicago, Illinois, May/June 1999
Session 44. Computation and Data Analysis
Display, Tuesday, June 1, 1999, 10:00am-7:00pm, Southwest Exhibit Hall

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[44.01] Cosmic Ray Rejection and the Next Generation Space Telescope

J.D. Offenberg, D.J. Fixsen, R. Sengupta (Raytheon ITSS), M.A. Nieto-Santisteban, H.S. Stockman, R.J. Hanisch (STScI)

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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