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Calibration and Characterization of Trap Detector Filter Radiometers



David W. Allen, George P. Eppeldauer, Steven W. Brown, E A. Early, Bettye C. Johnson, Keith R. Lykke


We describe the development of a mechanically simple, radiometrically stable transfer radiometer designed for both radiance and irradiance measurements. The filter radiometer consists of a six-element Si trap detector, a temperature stabilized filter wheel with up to 5 filters, and two precision apertures in a Gershun tube arrangement. With the Gershun tube installed, the instrument operates in radiance mode; with it removed, in irradiance mode. Two trap detector filter radiometers have been designed and built by the National Institute of Standards and Technology (NIST) for use in remote sensing applications. The filter radiometers have been characterized for optical and electrical performance, and have been calibrated for responsivity using both narrow-band, tunable-laser-illuminated and broad-band, lamp-illuminated integrating sphere sources. This paper describes the filter radiometer design, characterization, and deployments for several remote sensing projects.
Proceedings Title
Earth Observing Systems VIII | 8th | Earth Observing Systems VIII | SPIE
Conference Dates
August 3-6, 2003
Conference Title
Proceedings of SPIE--the International Society for Optical Engineering


radiometer, remote sensing, trap detector


Allen, D. , Eppeldauer, G. , Brown, S. , Early, E. , Johnson, B. and Lykke, K. (2003), Calibration and Characterization of Trap Detector Filter Radiometers, Earth Observing Systems VIII | 8th | Earth Observing Systems VIII | SPIE (Accessed June 14, 2024)


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Created November 1, 2003, Updated February 17, 2017