摘要
GNSS对地面用户的应用价值取决于GNSS信号对地面的覆盖性能,这不仅取决于星载传感器的信号辐射角范围,还取决于用户自身的最小观测角。本文对GNSS地面覆盖性原理进行了分析,给出了判别依据,然后对北斗区域服务系统、北斗全球导航系统及其与其它GNSS组合共5种仿真方案的地面覆盖性进行了仿真。在实际应用中,可以根据仿真结果针对不同的应用任务选取不同的卫星星座或选取多星座互操作,以保证最大同时可见卫星数,从而更好地提升GNSS卫星星座的应用价值。
For ground users, the application value of global navigation satellite system （GNSS） depends on the ground coverage performance （GCP） of GNSS constellations. These performances are influenced by restriction of both the signal＇ s beam angle and the mask angle which is used by the receivers of users. The theory of GCP of GNSS is analyzed and the judgment method is derived in this paper. In addition, five pro- grams including Beidou regional service system, Beidou global navigation system （BDS） and their combi- nation with other GNSSs are simulated and analyzed. Finally, the simulation results are acquired. In prac- tical application, relevant constellations can be selected according to different tasks which are based on the simulation results to ensure the maximum number of visible satellites at the same time.
出处
《航天控制》
CSCD
北大核心
2017年第6期58-63,68,共7页
Aerospace Control
基金
国家自然科学基金(61502257)
