GDOP is an important concept of GPS.
GDOP是GPS系统中的一个重要概念。
The GDOP of this system relates to baseline of formation-structure and mean square deviation of time measure.
分析表明该天基导航系统的几何参数精度因子受时间测量误差均方差和基线长度变化影响较大。
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。
We also discuss the effect of GDOP with the number of satellites. It is also proved in theory that the lowest GDOP using the matrix theory.
讨论了卫星数量对GDOP的影响，并用矩阵理论对其最小值进行证明。
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。
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。
Finally, the contours of GDOP under various conditions in the specific surveillance region and the influence with basic line and the depth and so on are drawn by computer simulation.
最后通过仿真，分析不同基阵布阵情况下的受控区域内GDOP的分布情况及基线和目标的深度等对GDOP的影响。
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。
Then according to the voidness of GPS satellites in different position, the effect on navigation accuracy of GPS(that is GDOP)is studied. The validity of voidness strategy is proved by simulation.
首先分析了GPS卫星对特定区域的覆盖情况，然后针对不同位置的GPS卫星失效，考察对GPS导航精度即目标区域GDOP值的影响，并通过仿真予以验证。
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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