论文部分内容阅读
星座对地覆盖性能要求是进行星座设计的主要依据。根据视函数法和地心法 ,建立了星座覆盖性能评定的数值仿真方法。以 GPS为例 ,对其覆盖性能指标进行了仿真。给出了GPS星座的视函数图 ,累积出覆盖统计特性 ,并且评价了覆盖质量。另外对 GPS星座的相位以及降级情况 (一颗或几颗卫星损坏 )下的覆盖质量进行了分析。最后对两种方法的仿真结果进行了分析比较。本文所建立的数值仿真方法对星座设计具有一定的参考价值
Constellation to ground coverage performance requirements are the main basis for constellation design. According to the visual function method and geocentric method, a numerical simulation method of constellation coverage evaluation is established. Taking GPS as an example, the simulation of coverage performance index is carried out. The visual function plot of GPS constellation is given, the coverage statistics are accumulated, and the quality of coverage is evaluated. In addition, the quality of coverage under the phase of the GPS constellation and degradation (one or more satellite damage) is analyzed. Finally, the simulation results of the two methods are analyzed and compared. The numerical simulation method established in this paper has certain reference value for constellation design