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。

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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。

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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。

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