uses multi-temporal remote sensing data, a variety of image processing and pattern recognition methods to extract change information, quantitatively analyze and determine the characteristics and processes of surface changes.

, satellite ozone monitoringChang Satellite Technology Co., Ltd. ( CGSTL), founded on December 1st, 2014, it's a unique commercial aerospace enterprise with the development and operation of research, management as well as remote sensing information processing all in one. With a total registered capital of 1.97 billion RMB, the company comprises Jilin Provincial Government, Changchun Institute of Optics, Fine Mechanics and Physics (CIOMP), social capital, and technical backbone.