高低轨卫星联合定位研究

从卫星地面终端定位的发展来看,整合现有卫星资源,将低轨星和高轨星联合起来形成一种新型星座组合是将来的一种发展趋势。依据现有定位体制的原理和特征,提出了高低联合双星时差频差定位、高低联合三星时差定位两种新颖的高低轨联合定位方法,提供了详细的理论依据和仿真结果,说明了高低联合定位在定位误差、误差分布等方面的优势,分析了一高两低和两高一低组合的性能差异,为卫星地面终端定位技术的发展提供理论支撑。

Research on Combined Location by Low and High Orbit Satellites

It is indicated by the development of satellite location of ground emitter that a future trend is to integrate the existing satellite resources and realize locating with low and high orbit satellites.According to the principle and characteristics of known location method,the paper presents two methods of combined location by low and high orbit satellites：dual-satellite location with time difference and frequency difference and tri-satellite location with time difference.The advantages of the two methods in location accuracy and error distribution are presented on the basis of detailed theoretical analysis and simulation result.The conclusion would be extremely helpful for the future development of satellite location technology for ground emitter.