The Spacecraft orbit determination is the basic guarantee of human’s space exploration. spacecraft is affected by several force such as G-force、Atmosphere drag、Earth elastomeric tide、ocean tide、The gravitation from Sun and Moon and the radiation pressure from the Sun. Therefore, the motion is very complex. Our research group has researched spacecraft orbit mechanics for a long time, new theories and new methods have been presented. New prelimiary orbit determination method is presented by them(UVM), which is widely used in our country’s space exploration. Especially, the method is very effective when our oceangoing vessel observe and control our satellite in the sea. It played a key role in the maritime tracking of our Beidou satellite、 Feng huo satellite、Feng yun satellite and Shen zhou project, and also in “Change I” project. The group has researched cataloging space debris orbit and satellite collision alarm、satellite autonomous orbit determination、constellation orbit design and so on ,while China’s aviation and avigation industry is rapidly developing. Now the group has gotten many research achievements. The satellite-born software of GPS orbit prediction and precise determination, which is developed for satellite "Innovation No.1” ,has been widely used in China’s satellite.

   The group has win one National Awards for Science and Technology(First Prize)、one National Defence Awards for Science and Technology(First Prize)、two Military Awards for Science and Technology progress(Second Prize) since 2004.

   The research group will continue researching precise orbit determination of spacecraft considering our country’s need, contribute to our nation’s aviation and avigation.