Abstract:Ranging and direction finding are common means for relative measurement between aircrafts. Usually, the accuracy of mutual ranging between aircrafts is much higher than that of absolute position navigation of aircraft. Therefore, this paper proposes a cooperative relative positioning method based on the range and direction finding between cluster aircrafts. The relative positioning of cluster aircraft and non-cooperative target can be achieved by using the range between cluster aircrafts and the direction finding of non-cooperative target by each aircraft. Those methods are divided into static relative positioning method and dynamic relative positioning method. In this paper, a cooperative relative positioning scheme based on mutual ranging between aircrafts and direction finding of non-cooperative targets is proposed, which does not require complete relative position measurement of non-cooperative targets and simplify the requirements of the configuration of aircraft measurement equipments. Compared with the relative positioning scheme based on absolute position navigation of aircrafts and direction finding of non-cooperative targets, it can achieve a higher relative positioning accuracy.