基于星间激光测距的三星时差定位系统标校方法

Calibration Technique of Tri-satellite TDOA Location System Based on Measuring Distance Between Satellites by Laser

利用精确的星间激光测距信息,提出了基于星间测距的三星时差定位系统标校方法。该方法消除了副星相对位置系统误差对定位精度的影响,同时提出了副星相对位置系统误差的解析解法,建立了模型误差和对副星相对位置系统误差进行估算的误差的定量关系,并证实了基于星间激光测距的标校方法可以在较大范围内提高定位精度。

Based on accurate distance information between satellites measured by laser,a calibration technique of a tri-satellite TDOA location system is put forward.The calibration technique can eliminate the influence on position accuracy arising from relative positioning system errors of slave satellites.Meanwhile,the analysis solution to the relative positioning system errors of slave satellites is raised.A quantitative relation is established between model errors and estimation errors of relative positioning system errors of slave satellites.Finally it has been confirmed that the calibration technique of tri-satellite TDOA location system based on the measuring distance between satellites by laser can improve the positioning accuracy to a great extent.