上海航天2018，Vol.35Issue(3)：54-59,6.DOI:10.19328/j.cnki.1006-1630.2018.03.009
高低轨双星时频差无源定位精度
Geolocation Accuracy of High and Low Orbit Satellites by Using TDOA and FDOA
摘要
Abstract
Combined geolocation by high and low orbit satellites is an effective way to significantly improve the passive geolocation performance of ground emitter. The reason why geolocation accuracy of high and low orbit satellites is better than that of same orbit satellites is analyzed from two aspects of the TDOA (time difference of arrival)baseline and velocity difference increase. The expression of GDOP(geometric dilution of precision)of high and low orbit dual satellites is deduced. The TDOA/FDOA measurement method which can be used for combined geolocation by high and low orbit satellites and its accuracy are introduced. The simulation results show that the geolocation accuracy can reach 100meters on a large scale under the low orbit satellite. The influence of relative positions of dual satellites, measurement error of TDOA and FDOA, measurement error of satellite position and velocity on the geolocation accuracy of high and low orbit dual satellites is demonstrated.关键词
无源定位/高低轨联合定位/双星时频差定位/定位误差分布/定位精度/时频差测量/互模糊函数/卫星轨道测量误差分类
信息技术与安全科学引用本文复制引用
狄慧,潘金波,张国强,赵庆广..高低轨双星时频差无源定位精度[J].上海航天,2018,35(3):54-59,6.基金项目
国家自然科学基金(61601298) （61601298）
