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Article: Removal of Contaminated Pixels from the Desert Target for AVHRR Vicarious Calibration
- Article from:
- Journal of Atmospheric and Oceanic Technology
- Article date:
- July 1, 2009
- Author:
CopyrightCopyright American Meteorological Society Jul 2009. Provided by ProQuest LLC. (Hide copyright information)
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ABSTRACT
Desert-based vicarious calibration plays an important role in generating long-term reliable satellite radiances for the visible and near-infrared channels of the Advanced Very High Resolution Radiometer (AVHRR). Lacking an onboard calibration device, the AVHRR relies on reflected radiances from a target site, for example, a large desert, to calibrate its solar reflective channels. While the radiometric characteristics of the desert may be assumed to be stable, the reflected radiances from the target can occasionally be affected by the presence of clouds, sand storms, vegetation, and wet surfaces. These contaminated pixels must be properly identified and removed to ensure ...