期刊
REMOTE SENSING
卷 2, 期 8, 页码 1918-1940出版社
MDPI
DOI: 10.3390/rs2081918
关键词
reflectance; albedo; climate; remotesensing; snow; vegetation; measurement; satellite; goniometer; spectrometer; FIGIFIGO
类别
资金
- Academy of Finland
- European Commission Interreg program project Norsen
- Finnish Ministry of Agriculture and Forestry
- EUMETSAT through Climate-SAF
- EUMETSAT through Land-SAF
- EUMETSAT through Hydro-SAF
Land surface hemispherical albedos of several targets have been resolved using the bidirectional reflectance factor (BRF) library of the Finnish Geodetic Institute (FGI). The library contains BRF data measured by FGI during the years 2003-2009. Surface albedos are calculated using selected BRF data sets from the library. Polynomial interpolation and extrapolation have been used in computations. Several broadband conversion formulae generally used for satellite based surface albedo retrieval have been tested. The albedos were typically found to monotonically increase with increasing zenith angle of the Sun. The surface albedo variance was significant even within each target category / surface type. Ingeneral, the albedo estimates derived using diverse broadband conversion formulas and estimates obtained by direct integration of the measured spectra were in line.
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