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Optical Engineering

Temperature-dependent linearity calibration for the SPIRIT III radiometer
Author(s): Mark F. Larsen; Steven D. Sargent
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Paper Abstract

A temperature-dependent linearity correction function is derived using ground calibration data for the spatial infrared imaging telescope (SPIRIT III) radiometer. First, a small-signal analysis is used to derive linearity correction functions for each array at several focal plane temperatures. These functions are used to derive a single temperaturedependent linearity correction function for each array. The arrays exhibit some detector-dependent nonlinearity. A temperature- and detectordependent linearity correction function is developed by modifying the temperature-dependent array-average linearity correction function so that the half-scale nonlinearity is correct for each detector in the array. Using the nonuniformity correction (NUC) coefficient of variation (COV) as a metric, this temperature- and detector-dependent linearity correction function results in a COV between 0.35 to 2.6% for all arrays, depending on the array and integration mode.

Paper Details

Date Published: 1 November 1997
PDF: 7 pages
Opt. Eng. 36(11) doi: 10.1117/1.601536
Published in: Optical Engineering Volume 36, Issue 11
Show Author Affiliations
Mark F. Larsen, Utah State Univ. (United States)
Steven D. Sargent, Utah State Univ. (United States)


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