Base on the global reference system and according to these geodetic results th...
根据这些大地测量成果以全球参照系为基准，对该地区的重力场进行了研究。
It has not only standardized what must be reported to register a trial but is creating a global trial identification system that will confer a unique reference number on every qualified trial.
它不只使注册试验时须报告的内容标准化，而且建立了一个全球试验鉴定系统，为每项合格的试验颁发一个独有的参考号码。
In this paper, we analyze the key techniques for the service precision of Global Navigation satellite System such as time reference, time synchronization, satellite orbit determination, etc.
对影响导航定位系统定位精度的各种因素进行了分析。研究了影响导航定位精度的关键技术问题，如时间基准、时间同步和卫星定轨等。
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