Temperature-dependent linearity calibration for the SPIRIT III radiometer

Details Temperature-dependent linearity calibration for the SPIRIT III radiometer Temperature-dependent linearity calibration for the SPIRIT III radiometer

Nov 1997

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997opten..36.2956l&link_type=abstract

Optical Engineering 36(11), 2956-2962, Brian J. Thompson; Ed.

Physics

2

Scientific paper

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 drive linearity correction functions for each array at several focal plane temperatures. These functions are used to derive a single temperature- dependent linearity correction function for each array. The arrays exhibit some detector-dependent nonlinearity. A temperature- and detector-dependent 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.

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