广域差分新方法的定位性能与差分网优化布局

Positioning Performance of a Novel Wide Area Differential Method and Optimized Distribution on Differential Network

提出了一种星钟和星历分离的广域差分原理以及一站时间同步其他站无需时间同步的实现方法,通过简易差分网验证了这种原理和方法的正确性、有效性和可行性。同时,针对简易差分网存在定位的均匀性较差和覆盖区域较小等问题,提出了一种差分网优化布局方案,通过进一步分析,得出这种布局具有差分定位精度高、定位均匀性好和基本覆盖我国领海领地的能力。

A novel wide area differential principle on the separation of satellite clock errors and satellite ephemeris was proposed. The realization method of a differential station with time synchronization and other stations without time synchronization were discussed. The accuracy, effectiveness, feasibility of the principle and the realization method are verified through the simple differential network. In view of the poor uniformity and small regional coverage of the simple differential network, an optimizing scheme on the distribution of differential network was set forth. Through further analysis, the conclusions that this distribution have high differential positioning accuracy, good positioning uniformity and wider coverage basically including our national territory and marginal sea were drawn.