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海洋重力测量的厄缶(Eotvos)校正取决于船的导航定位数据间的关系。要想使海洋重力测量成果达到预期的精度,除了保证海洋重力仪的固有精度外,还必须把高精度的导航定位系统列为海洋重力测量的主要仪器设备。文中举例说明如何根据导航定位数据求出所需的用于计算厄缶校正的各个变量和相应的均方误差,以及各个重力测点的地理位置。
Eotvos corrections for ocean gravity measurements depend on the ship’s navigational positioning data. In order to achieve the expected accuracy of the ocean gravimetry results, in addition to guaranteeing the intrinsic accuracy of the ocean gravimeter, it is also necessary to list the high-precision navigation and positioning system as the main instrument of marine gravimetry. The article gives an example of how to find out the required variables for the correction of Eutherian and the corresponding mean-square error, as well as the geographical location of each gravitational measuring point, based on the navigational positioning data.