Airborne ground illuminator for hyperspectral validation and calibration

James E. Kalshoven Jr.

doi:10.1117/12.258116

11 November 1996 Airborne ground illuminator for hyperspectral validation and calibration

James E. Kalshoven Jr.

Author Affiliations +

Proceedings Volume 2820, Earth Observing System; (1996) https://doi.org/10.1117/12.258116
Event: SPIE's 1996 International Symposium on Optical Science, Engineering, and Instrumentation, 1996, Denver, CO, United States

Abstract

A major difficulty in accurately quantifying various of the Earth's geophysical and biophysical features from the multi- spectral reflectance data acquired from space is the lack of extensive and reliable validation measurements from good ground truth. A new, active airborne sensor system, AVIS (airborne vegetation index sensor), addresses that problem. AVIS uses a flash lamp mounted on a NASA helicopter to illuminate the Earth with a 15 by 35 mrad spot. The visible and near-IR backscattered radiation is then received hyperspectrally and can be analyzed. Initially designed for validation of theories on vegetation index determination, AVIS has broad application as a simulator for solar illumination for remote surface analysis. Its primary advantage is the reduction or elimination of atmospheric scattering and solar angle effects, and the removal of shadowing. It also provides repeatability for time analysis over the same sites.

Citation Download Citation

James E. Kalshoven Jr. "Airborne ground illuminator for hyperspectral validation and calibration", Proc. SPIE 2820, Earth Observing System, (11 November 1996); https://doi.org/10.1117/12.258116

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