Comparison Of Laboratory Calibrations Of The Airborne Visible/Infrared Imaging Spectrometer (AVIRIS) At The Beginning And End Of The First Flight Season

Gregg Vane; Thomas G Chrien; John H Reimer; Robert O Green; James E Conel

doi:10.1117/12.945684

12 October 1988 Comparison Of Laboratory Calibrations Of The Airborne Visible/Infrared Imaging Spectrometer (AVIRIS) At The Beginning And End Of The First Flight Season

Gregg Vane, Thomas G Chrien, John H Reimer, Robert O Green, James E Conel

Author Affiliations +

Proceedings Volume 0924, Recent Advances in Sensors, Radiometry, and Data Processing for Remote Sensing; (1988) https://doi.org/10.1117/12.945684
Event: 1988 Technical Symposium on Optics, Electro-Optics, and Sensors, 1988, Orlando, FL, United States

Abstract

Spectral and radiometric calibrations of the Airborne Visible/Infrared Imaging Spectrometer (AVIRIS) were performed in the laboratory in June and November, 1987, at the beginning and end of the first flight season. This paper describes those calibrations and the changes in instrument characteristics that occurred during the flight season as a result of factors such as detachment of the optical fibers to two of the four AVIRIS spectrometers, degradation in the optical alignment of the spectrometers due to thermally-induced and mechanical warpage, and breakage of a thermal blocking filter in one of the spectrometers. These factors caused loss of signal in three spectrometers, loss of spectral resolution in two spectrometers, and added uncertainty in the radiometry of AVIRIS. Results from in-flight assessment of the laboratory calibrations are presented. The paper concludes with a discussion of improvements made to the instrument since the end of the first flight season and plans for the future. Improvements include (1) a new thermal control system for stabilizing spectrometer temperatures, (2) kinematic mounting of the spectrometers to the instrument rack, and (3) new epoxy for attaching the optical fibers inside their mounting tubes.

Citation Download Citation

Gregg Vane, Thomas G Chrien, John H Reimer, Robert O Green, and James E Conel "Comparison Of Laboratory Calibrations Of The Airborne Visible/Infrared Imaging Spectrometer (AVIRIS) At The Beginning And End Of The First Flight Season", Proc. SPIE 0924, Recent Advances in Sensors, Radiometry, and Data Processing for Remote Sensing, (12 October 1988); https://doi.org/10.1117/12.945684

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