考虑地物BRDF特性改进后的CBERS-02卫星CCD相机的辐射定标系数

Enhanced Radiometric Calibration Coefficients for CCD Camera by Considering BRDF of Calibration Sites

在MOD IS数据对CBERS-02卫星CCD相机的交叉辐射定标、获得CCD相机时间系列的辐射定标斜率系数与截距基础上,本文考虑地物BRDF特性的影响,开展了提高CCD相机数据定量化应用的辐射定标数据精度的研究,并提供了比较全的时间系列辐射定标系数。

In our previons study radiometric cross-calibration for CCD camera using MODIS data, and they gave the radiometric coefficients and offsets were given. However, the calibration precision of those calibration coefficients is not so good, since the BRDF of the calibration sites was not considered. What＇ s more, the calibration coefficients for time series of CCD data are limited because calibrations were performed for the pairs of images of which the viewing zeniths of the MODIS are smaller than 30°. The effort of the article is to enhance the calibration precision of calibration coefficients for CCD data by considering the BRDF of the calibration sites. And more complete calibration coefficients for time series of CCD data are intended to be provided.