第二部分从理论上讨论了动力大地测量网络数据库系统的基础知识和数据模型，研究了网络数据库系统的特点、工作模式以及主要技术。
The second part discussed the theoretical knowledge and data models of DGNDBS; studied the feature, work model and main technique of the network database system.
GPS是一种全天候的、高精度的连续定位系统。文中扼要地说明了它在工程测量和海洋大地测量中的应用前景。
GPS is a all - weather, high - accuracy and continuously - positioning system. The paper explains briefly its application prospects in engineering measurement and ocean geological measurement.
把半参数模型引入大地测量反演模型，有利于消除或削弱了测量数据系统误差对大地测量反演的模型参数的影响；
Having leaded the semi-parameter model into the geodetic inversion model, the effect of surveying data systemic error is eliminated or weakened on the geodesy inversion model.
通过地面网与卫星网的联合平差，以改善网的精度和建立高精度的地心坐标系统，是当前大地测量的一项重要任务。
It is an important mission of Geodesy to improve an accuracy of control networks and to establish the geocentric coordinate system via combined satellite and terrestrial network adjustment.
概述了大地测量学作为测绘基准提供地理信息系统的基础框架作用。
The role of geodesy, as the datum of surveying and mapping, for providing the fundamental frame of GIS is briefly discussed.
地球大气中的水汽在全球气候系统、天气动力系统、大气环境科学、水文学以及空间大地测量等方面占有非常重要的地位。
Water vapor in earth's atmosphere plays a crucial role for climate, dynamics of weather system, atmosphere environment, hydrology and space geodesy.
地球大气中的水汽在全球气候系统、天气动力系统、大气环境科学、水文学以及空间大地测量等方面占有非常重要的地位。
Water vapor in earth's atmosphere plays a crucial role for climate, dynamics of weather system, atmosphere environment, hydrology and space geodesy.
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