摘要
研究了低轨道双星通过测量时差和频差对地面固定辐射源进行无源定位的问题。双星时差/频差定位算法是时差、频差单独定位公式和WGS-84地球椭球模型的结合,该算法通过迭代的方法提高了定位精度。文中结合定位误差算法和定位精度的GDOP算法,通过仿真、对比系统地分析了影响双星时差/频差定位系统定位精度的因素,分析结果对双星定位系统的应用具有借鉴意义。
The low orbit dual-satellites passive FDOA is discussed in this paper. The dual-satellites location of the ground fixed emitter by measuring the TDOA and TDOA/FDOA location formula consists of the TDOA localization formula, FDOA localization formula and WGS-84 ellipsoid earth model. An iterative method is used to improve the precision of location. By the combination of the ＂positioning error algorithm and GDOP method, the main factors in- fluencing the precision of location are systemically analyzed by simulation and comparison. The results are of signifi- cance to the dual-satellites positioning system application.
出处
《电子科技》
2014年第2期53-57,共5页
Electronic Science and Technology
