区域覆盖共地面轨迹星座的优化设计

该文讨论了使用中轨共地面轨迹星座建立区域覆盖卫星通信系统的优化设计方法。在深入研究共地面轨迹星座参数特性的基础上，提出了一种能够完整描述该类型星座的编码标识方法，推导了星座与星座的等价关系，讨论了利用该类型星座实现区域覆盖时的优化方法，给出了适用于我国的多个优化星座方案实例。从仿真结果可以看出，该类型星座能够以较少数量的卫星为我国提供良好的覆盖性能，适于我国的区域覆盖卫星通信系统采用。

The Design of Optimized Common-Track Constellation for Regional Coverage

An optimization design method for implementing regional coverage satellite system with common-track constellation is proposed. Based on a thorough investigation on the parametric characteristics of the common-track constellation, a coded notation which can describe this type of constellation entirely is proposed and the restricted equivalent relationship to the Walker’s δ constellation is given. The optimized method of common-track constellation for regional coverage is studied, and some optimal constellation schemes for China are presented. The simulation results show that the optimized common-track constellation can provide favorable coverage performance to China area with fewer satellites. The designed constellations are appropriate for the regional coverage satellite system of China.