The risk assessment study indicates that the satellite system can't be considered as the sole-means for the nations radionavigation system.
险评估
明星基系统（GPS、GLONASS）不能作为唯一的导航、定位、定时手段。
The risk assessment study indicates that the satellite system can't be considered as the sole-means for the nations radionavigation system.
险评估明星基系统（GPS、GLONASS）不能作为唯一的导航、定位、定时手段。
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