Angular Correction of Apparent Reflectance For Meteorological Geostationary Satellite Data

Meteorological geostationary satellite data provide a data source for the study of the directional apparent reflectance of land surface because it collects surface information in fixed direction but with various solar illumination direction in one day or several days. In this paper, the reflectance values of water body pixels were investigated with respect to the observation geometry using Himawari-8 NC data, and the original zenith and azimuth angles were converted to relative angles RA and RAA, and the linear relationship between the reflectance and the relative angles was constructed through regression analysis. Results show that there is a good statistical relationship between apparent reflectance and relative angles RA/RAA. The method in this paper provide a fast angular correction on the apparent reflectance for meteorological geostationary satellite data.