Estimation of broadband planetary albedo from operational narrowband satellite measurements

Details Estimation of broadband planetary albedo from operational narrowband satellite measurements Estimation of broadband planetary albedo from operational narrowband satellite measurements

Apr 1987

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987ebpa.reptq....w&link_type=abstract

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Physics

Albedo, Broadband, Earth Radiation Budget, Errors, Narrowband, Regression Analysis, Advanced Very High Resolution Radiometer, Algorithms, Multispectral Band Scanners, Nimbus 7 Satellite, Reflectance

Scientific paper

A scene independent algorithm for estimating broadband planetary albedo using NOAA/AVHRR narrowband satellite data is presented. Initial results from a radiative transfer model investigation are given, followed by empirical coefficients which were deduced through multivariant regression analysis of Nimbus-7/ERB broadband data and NOAA-7/AVHRR narrowband data. Planetary scenes were grouped into five major categories. Strong variations in the two channel AVHRR narrowband albedo observations were noted for different scene classifications which emphasize the potential error in using a single AVHRR channel 1 albedo determination as was historically done. It was found that while individual scene regressions have significantly different regression characteristics; they allow a single regression when all surfaces are taken together due to their natural albedo range. Scene independent coefficients relating to AVHRR narrowband channels 1 and 2 to ERB broadband were presented with an explained variance of 0.956. Individual scene analyses are also presented but the emphasis was the scene independent studies. The results presented should allow improved albedo calculations when one is limited to AVHRR narrowband data.

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