Quality evaluation and usability analysis of CCD image in life extension period for HJ-1 satellite

HJ-1 Satellite has made an important role in monitoring and prediction of disaster and environment since it launched successfully, and it has been serviced for 3 years, and it is in extension period. In order to evaluate image in the extension period, the study selected three image features: geometric deviation, texture feature and gray level feature. By comparing the images of the same temporal Landsat7 ETM+ and the forepart HJ-1A CCD, the quality of the extension period images from CCD sensor onboard HJ-1 Satellite was evaluated objectively. The result shows that the quality of extension period image of HJ-1 Satellite has declined a little, but it is close to the forepart image of HJ-1 Satellite. Image of HJ-1 Satellite in the extension period still can describe the types of the surface features and details. It still can provide service like the forepart image in environment monitoring, disaster monitoring, land and natural resources management, city planning and agricultural application.