LANL MTI calibration team experience

Steven C. Bender; William H. Atkins; William B. Clodius; Cynthia K. Little; R. Wynn Christensen

doi:10.1117/12.509774

7 January 2004 LANL MTI calibration team experience

Steven C. Bender, William H. Atkins, William B. Clodius, Cynthia K. Little, R. Wynn Christensen

Proceedings Volume 5159, Imaging Spectrometry IX; (2004) https://doi.org/10.1117/12.509774
Event: Optical Science and Technology, SPIE's 48th Annual Meeting, 2003, San Diego, California, United States

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.

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Steven C. Bender, William H. Atkins, William B. Clodius, Cynthia K. Little, and R. Wynn Christensen "LANL MTI calibration team experience", Proc. SPIE 5159, Imaging Spectrometry IX, (7 January 2004); https://doi.org/10.1117/12.509774

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KEYWORDS

Calibration

Reflectivity

Sensors

Thermography

Lamps

Staring arrays

Algorithm development

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