Fish's interpretation of the map was created from the viewpoint of a doublestarsystem called Zeta Reticuli.
菲丝对这幅地图的解释产生于一个叫做“齐塔网状星系”的双星系观点。
2
According to the characteristic of Beidou double-star positing system(double-star positoin), this paper puts forward the optimal predication model of double-star position/SINS integrated system.
根据北斗双星定位系统（简称双星定位）的特点，提出了北斗双星与SINS组合的最优预测模型。
3
Basing on the Doublestar Active Positioning System, this article conducted the research on the Beidou Tri-star Passive Positioning System.