Vignetting and Chromatic Aberration Correction for Multiple Spaceborne CCDS

Aerial remote sensing image products are divided into 4 levels. The quality of Level-0 products determines the quality of other level products. High resolution optical satellite systems use optical focal plane assemblies to enhance the image width using push-broom imaging. Level-0 images obtained by this system will exist vignetting and chromatic aberration in the overlapped regions, affecting the use of image products. Currently, the main solutions include laboratory radiometric calibration, on-orbit relative radiometric calibration, statistical methods and histogram based on side-slither data. In order to solve defects of the existing methods, this paper proposed a general radiometric calibration method for vignetting and chromatic aberration of multiple CCDs, which outperformed existing ones. In addition, defective GF-1C image product delivered by the official agency (China Centre for Resources Satellite Data and Application) is selected for comparison, and the chromatic aberration and supersaturation existing in the official product can be solved by directly applying the proposed method with the correction parameters estimated from independent calibration dataset.