Providing communication and internet services by mega constellation is the developing trend of the communication system. For the requirement of quick analysis of mega Walker constellation, utilizing the symmetry of the constellation, a continuous coverage analysis method is proposed based on 2D map theory. This method first calculates the minimum unit with repeated coverage performance on the 2D map according to constellation configuration parameters. Then select the satellites that determine the coverage performance of the minimum unit. Based on the phase distribution of these satellites, the overlap of their coverage regions inside the minimum unit is solved. Finally, the coverage performance of the whole constellation can be obtained. Compared with the conventional methods, this method avoids redundant calculation of inter-satellite positions and positions between the satellites and ground targets, which greatly simplifies the solving process of the coverage performance, so that the time complexity does not increase significantly with the increase of satellites. Taking the Starlink system as an example, the simulation results show that compared to the conventional method, the proposed method can obtain the coverage performance of the same precision while taking much less time.

通过巨型星座提供通信和互联网服务是通信系统的发展趋势。针对巨型Walker星座快速分析的需求，利用星座的对称性，提出了一种基于二维地图理论的连续覆盖分析方法。该方法首先根据星座配置参数计算二维地图上具有重复覆盖性能的最小单元。然后选择确定最小单元覆盖性能的卫星。基于这些卫星的相位分布，解决了它们在最小单元内覆盖区域的重叠问题。最终可以得到整个星座的覆盖性能。与传统方法相比，该方法避免了星间位置和卫星与地面目标位置的冗余计算，大大简化了覆盖性能的求解过程，使得时间复杂度不会随着卫星数量的增加而显着增加。以Starlink系统为例，仿真结果表明，与传统方法相比，所提出的方法可以获得相同精度的覆盖性能，同时花费的时间要少得多。