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Area Estimation of Environmental Phenomena from Noaa-N Satellite Data.

N8224553

Publication Date	1982
Personal Author	Tappan, G.; Miller, G. E.
Page Count	48
Abstract	A technique for documenting changes in size of NOAA-n pixels in order to calibrate the data for use in performing area calculations is described. Based on Earth-satellite geometry, a function for calculating the effective pixel size, measured in terms of ground area, on any given pixel was derived. The equation is an application of the law of sines plus an arclength formula. Effective pixel dimensions for NOAA 6 and 7 satellites for all pixels between nadir and the extreme view angles are presented. The NOAA 6 data were used to estimate the areas of several lakes, with an accuracy within 5%. Sources of error are discussed.
Keywords	Area Data processing Functions (Mathematics) Image processing Imaging techniques Lakes Agristars project Calibrating Earth resources program Satellite observation Tiros n series satellites
Source Agency	National Aeronautics and Space Administration
NTIS Subject Category	48I - Cartography
Corporate Authors	Lockheed Engineering and Management Services Co., Inc., Houston, TX.; National Aeronautics and Space Administration, Washington, DC.
Supplemental Notes	Sponsored by NASA, Usda, Dept. Of Commerce, Dept. Of the Interior, and Agency for International Development. Erts.
Document Type	Technical Report
NTIS Issue Number	198221
Contract Number	NAS9-15800

Area Estimation of Environmental Phenomena from Noaa-N Satellite Data.

Area Estimation of Environmental Phenomena from Noaa-N Satellite Data.
N8224553

Publication Date	1982
Personal Author	Tappan, G.; Miller, G. E.
Page Count	48
Abstract	A technique for documenting changes in size of NOAA-n pixels in order to calibrate the data for use in performing area calculations is described. Based on Earth-satellite geometry, a function for calculating the effective pixel size, measured in terms of ground area, on any given pixel was derived. The equation is an application of the law of sines plus an arclength formula. Effective pixel dimensions for NOAA 6 and 7 satellites for all pixels between nadir and the extreme view angles are presented. The NOAA 6 data were used to estimate the areas of several lakes, with an accuracy within 5%. Sources of error are discussed.
Keywords	Area Data processing Functions (Mathematics) Image processing Imaging techniques Lakes Agristars project Calibrating Earth resources program Satellite observation Tiros n series satellites
Source Agency	National Aeronautics and Space Administration
NTIS Subject Category	48I - Cartography
Corporate Authors	Lockheed Engineering and Management Services Co., Inc., Houston, TX.; National Aeronautics and Space Administration, Washington, DC.
Supplemental Notes	Sponsored by NASA, Usda, Dept. Of Commerce, Dept. Of the Interior, and Agency for International Development. Erts.
Document Type	Technical Report
NTIS Issue Number	198221
Contract Number	NAS9-15800