Land Surface Albedos Computed from BRF Measurements with a Study of Conversion Formulae

Remote Sensing

Jouni I. Peltoniemi¹  Terhikki Manninen²  Juha Suomalainen¹  Teemu Hakala¹  Eetu Puttonen¹ 

[1] Finnish Geodetic Institute, P.O. box 14, FI-02431 Masala, Finland; E-Mails:;Finnish Meteorological Institute, Earth Observation, P.O. Box 503, FI-00101 Helsinki, Finland; E-Mails:

关键词: reflectance;    albedo;    climate;    remote sensing;    snow;    vegetation;    measurement;    satellite;    goniometer;    spectrometer;    FIGIFIGO;   

DOI  :  10.3390/rs2081918

来源: mdpi

【 摘 要 】

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 datasets 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. In general, the albedo estimates derived using diverse broadband conversion formulas and estimates obtained by direct integration of the measured spectra were in line.

【 授权许可】

CC BY   
© 2010 by the authors; licensee MDPI, Basel, Switzerland.