MANEUVER IMAGE QUALITY RAISING FOR SJ-9A SATELLITE

摘要

It is very important for observation of remote sensing satellite when nature disaster and breaking event take place. So the image quality of motive swing imaging is carried out to study the factors of on-board the imaging procedure and ground image processing. In this paper, we take panchromatic and multi-spectral camera of SJ-9A satellite as example. The method research and in-orbit validation has been finished to raise image quality of motive imaging. This camera uses the three-reflector coaxial aspheric optical system, adopts a panchromatic and 4 multispectral integration design, Images can be simultaneously acquired in PA and MS mode at the same point. Its resolution is superior to 2.5m (PA)/10m (MS) and the swath is 30km for nadir viewing conditions with the orbit height 645km. This paper compares in-orbit maneuver imaging experiment with analysis of the influence factors for imaging link. The quantitative analysis has been carried out for in-orbit maneuver imaging test. At final the imaging fusion algorithm is optimized finally to improve panchromatic and multi-spectral imaging processing flow by ground application system. The result shows that the multispectral match is more accurate and clear than before. The quality of images has been raised obviously to reach good level.