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Proceedings Paper

LANL MTI calibration team experience
Author(s): Steven C. Bender; William H. Atkins; William B. Clodius; Cynthia K. Little; R. Wynn Christensen
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Paper Abstract

The Multispectral Thermal Imager (MTI) was designed as an imaging radiometer with absolute calibration requirements established by Department of Energy (DOE) mission goals. Particular emphasis was given to water surface temperature retrieval using two mid wave and three long wave infrared spectral bands, the fundamental requirement was a surface temperature determination of 1K at the 68% confidence level. For the ten solar reflective bands a one-sigma radiometric performance goal of 3% was established. In order to address these technical challenges a calibration facility was constructed containing newly designed sources that were calibrated at NIST. Additionally, the design of the payload and its onboard calibration system supported post launch maintenance and update of the ground calibration. The on-orbit calibration philosophy also included vicarious techniques using ocean buoys, playas and other instrumented sites; these became increasingly important subsequent to an electrical failure which disabled the onboard calibration system. This paper offers various relevant lessons learned in the eight-year process of reducing to practice the calibration capability required by the scientific mission. The discussion presented will include observations pertinent to operational and procedural issues as well as hardware experiences; the validity of some of the initial assumptions will also be explored.

Paper Details

Date Published: 7 January 2004
PDF: 11 pages
Proc. SPIE 5159, Imaging Spectrometry IX, (7 January 2004); doi: 10.1117/12.509774
Show Author Affiliations
Steven C. Bender, Los Alamos National Lab. (United States)
William H. Atkins, Los Alamos National Lab. (United States)
William B. Clodius, Los Alamos National Lab. (United States)
Cynthia K. Little, Los Alamos National Lab. (United States)
R. Wynn Christensen, Los Alamos National Lab. (United States)

Published in SPIE Proceedings Vol. 5159:
Imaging Spectrometry IX
Sylvia S. Shen; Paul E. Lewis, Editor(s)

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