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Proceedings Paper

Radiometric and spectral stray light correction for the portable remote imaging spectrometer (PRISM) coastal ocean sensor
Author(s): Justin M. Haag; Byron E. Van Gorp; Pantazis Mouroulis; David R. Thompson
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Paper Abstract

The airborne Portable Remote Imaging Spectrometer (PRISM) instrument is based on a fast (F/1.8) Dyson spectrometer operating at 350-1050 nm and a two-mirror telescope combined with a Teledyne HyViSI 6604A detector array. Raw PRISM data contain electronic and optical artifacts that must be removed prior to radiometric calibration. We provide an overview of the process transforming raw digital numbers to calibrated radiance values. Electronic panel artifacts are first corrected using empirical relationships developed from laboratory data. The instrument spectral response functions (SRF) are reconstructed using a measurement-based optimization technique. Removal of SRF effects from the data improves retrieval of true spectra, particularly in the typically low-signal near-ultraviolet and near-infrared regions. As a final step, radiometric calibration is performed using corrected measurements of an object of known radiance. Implementation of the complete calibration procedure maximizes data quality in preparation for subsequent processing steps, such as atmospheric removal and spectral signature classification.

Paper Details

Date Published: 5 September 2017
PDF: 16 pages
Proc. SPIE 10402, Earth Observing Systems XXII, 104020E (5 September 2017); doi: 10.1117/12.2272746
Show Author Affiliations
Justin M. Haag, Jet Propulsion Lab. (United States)
Byron E. Van Gorp, Jet Propulsion Lab. (United States)
Pantazis Mouroulis, Jet Propulsion Lab. (United States)
David R. Thompson, Jet Propulsion Lab. (United States)

Published in SPIE Proceedings Vol. 10402:
Earth Observing Systems XXII
James J. Butler; Xiaoxiong (Jack) Xiong; Xingfa Gu, Editor(s)

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