最小GDOP组合Walker星座构型

Combined Walker Configurations with Minimal GDOP

几何精度衰减因子(GDOP)是衡量定位构型优劣的重要指标,探讨最小GDOP定位构型的几何结构在单GNSS星座设计和多系统组合优化方面具有现实意义。在GNSS普遍采用的Walker构型的基础上,导出了最小GDOP组合Walker构型所应满足的条件方程。讨论了单一和组合Walker构型的GDOP地表覆盖性质。最后,通过仿真分析验证了主要结论。

The GDOP （geometric dilutions of precision） is a key criterion to measure the graphic inten- sity of single-point-positioning configurations. Revealing the geometry of configurations with minimal GDOP has practical significance in the optimization design of single GNSS satellite constellation or multi-constellations. From the common used Walker configuration, we deduce a conditional equation to the combined Walker configurations to minimize the GDOP. The GDOP distribution on the surface of the Earth is discussed in terms of the conditional equation for minimizing the GDOP. Simulations were performed to verify the main results.