Validation of Up-the-Ramp Sampling with Cosmic Ray Rejection on IR Detectors

نویسندگان

  • J. D. Offenberg
  • D. J. Fixsen
  • B. J. Rauscher
  • W. J. Forrest
  • R. J. Hanisch
چکیده

We examine cosmic ray rejection methodology on data collected from InSb and Si:As detectors. The application of an Up-the-Ramp sampling technique with onthe-fly cosmic ray identification and mitigation is the focus of this study. This technique is valuable for space-based observatories which are exposed to high-radiation environments. We validate the Up-the-Ramp approach on radiation-test data sets with InSb and Si:As detectors which were generated for SIRTF. The Up-the-Ramp sampling method studied in this paper is over 99.9% effective at removing cosmic rays and preserves the structure and photometric quality of the image to well within the measurement error. Subject headings: instrumentation: detectors (InSb, Si:As) — methods: data analysis — methods: miscellaneous (Up-the-Ramp sampling, cosmic ray identification, cosmic ray rejection) — space vehicles: instruments techniques: image processing

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تاریخ انتشار 2000