Daytime sky radiance as a source of information on surface albedo in IR spectral region. Part I

Abstract

We suggest a methodical justification of determining the surface albedo in the near-infrared (NIR) region using the observations of spectral atmospheric transparency and daytime clear-sky radiance in solar almucantar. The contribution of the component describing the reflection processes to radiance at different angular distances from the Sun is analyzed. The effect of aerosol absorption on radiance components used in albedo determination is estimated. The solar zenith angle and elongation of aerosol scattering phase function are found to affect the final result of albedo calculation.