GPS positioning accuracy is influenced by Geometric Dilution of Precision (GDOP), Signal Noise Ratio (SNR) and so on.
几何精度衰减因子gdop和卫星信噪比SNR等多方面因素的影响，增大了GPS单点定位误差。
In the applications, there are many problems, such as timing synchronization, near - far effect, and geometric dilution of precision.
在应用中，常常会遇到时间同步、远近效应、几何精度衰减因子等问题。
Then, the effects of radar beacon position, cluster geometry and satellite altitude on the geometry dilution of precision factor are analyzed.
进一步分析了雷达辐射源位置、星座几何形状和星座的卫星高度对几何精度衰减因子的影响。
The principle of the algorithm is described. Through numerical simulation, the Geometrical Dilution of Precision (GDOP) for two different conditions is given.
给出了算法的原理，并通过数值仿真，对不同条件下，双基地系统定位误差的几何分布进行了研究。
The upper-limit of the positioning dilution of precision(PDOP) is an important index to design of a navigation constellation and evaluation of its performance.
定位精度因子（PDOP）上限取值是导航星座设计及其性能评价的基本依据。
Traditional GPS satellite selection algorithm uses only 4 satellites with minimal Geometric Dilution of Precision(GDOP)and doesn t work well in high dynamic conditions.
一般的GPS选星方法通过搜索选取使几何精度衰减因子最小的4颗卫星，对于高动态应用特别是在水平姿态角较大的情况下，传统的选星方法存在许多局限性。
Its location performance is analyzed by the Geometric Dilution of Precision (GDOP). In chapter 3, the estimation of TDOA/FDOA based on higher order cumulant is studied.
第二章研究了双星无源定位系统的定位原理和定位算法，结合其定位几何稀释对系统的定位性能进行了分析。
Moreover, its coverage performance is also evaluated under some factors, such as the geometric dilution of precision (GDOP), orbital perturbation, space transmission loss and eclipse.
并进一步在考虑摄动影响、空间传输损耗等因素的条件下评估了此星座的导航性能。
The localization principle of bistatic sonar is given and the GDOP(Geometry Dilution Of Precision) which used in bistatic radar for describing the localization error has been cited in bistatic sonar.
在对双基地声呐定位原理和定位误差分析的基础上，提出了用定位精度的几何解释（GDOP）来表征双基地声呐定位误差的方法。
The localization principle of bistatic sonar is given and the GDOP(Geometry Dilution Of Precision) which used in bistatic radar for describing the localization error has been cited in bistatic sonar.
在对双基地声呐定位原理和定位误差分析的基础上，提出了用定位精度的几何解释（GDOP）来表征双基地声呐定位误差的方法。
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