摘要
The term space situational awareness(SSA),in a broad sense,refers to the comprehensive knowledge of the near-Earth space environment.It has gained increasing attention as the number of space objects,including the natural and artificial,continues to grow rapidly in recent years and several collisions between them have occurred.One of the main objectives of SSA is to maintain awareness of potentially adversarial space events,in particular collisions,and avoid them.This typically involves tracking and identification of orbiting space objects,predicting their future locations,assessing the collision risk,and removing harmful objects such as debris to improve safety.
