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23 November 1982 Effect Of Sub-Pixel Sized Cloud On Vegetation Assessment From Satellite Data
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The visible and reflected infrared channels of the NOAA-7 Advanced Very High Resolution Radiometer (AVHRR) are used for environmental monitoring, including agricultural crop assessment. An index consisting of a combination of digital data from these channels is used to screen the AVHRR data for cloud. In this paper, we consider the effects on spectral signature of sub-pixel sized cloud, which does not fill the entire IFOV of the instrument. It is shown that, for two different targets, for clear and turbid atmospheric conditions and for various scan angles, cloud which would not be detected during the screening process will cause substantial effects (up to a five-fold decrease) in the data.
© (1982) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
M. J. Duggin, L. Schoch, and T. I. Gray "Effect Of Sub-Pixel Sized Cloud On Vegetation Assessment From Satellite Data", Proc. SPIE 0345, Advanced Multispectral Remote Sensing Technology and Applications, (23 November 1982);

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