摘要
水下重力测量的准确性是决定重力场辅助水下导航可行性的一个重要指标。从厄特弗斯改正公式出发,详细分析了纬度、航向、航速精度对厄特弗斯改正的影响方式和影响大小,并以当前海洋船测重力精度作为厄特弗斯改正的误差限定,分析了满足该条件下水下载体的航向、航速需要达到的精度指标,提出了利用惯性系统进行水下重力测量误差修正时对导航硬件的要求。
The precision of underwater gravimetry is an important factor to the feasibility of gravity-aided underwater navigation. The effect of latitude , carrier course and speed error on the Eotvos correction is analyzed based on Eotvos differentia formulation. By choosing marine gravimetry of ship as the limit of Eotvos correction error, the course and speed precision of underwater carrier is calculated, and the demand of inertial navigator performance is brought out.
出处
《海洋测绘》
2009年第2期1-3,8,共4页
Hydrographic Surveying and Charting
基金
国家863计划项目(2006AA06A202)
国家杰出青年科学基金(40125013)
关键词
水下导航
重力辅助导航
海洋重力测量
厄特弗斯改正
underwater navigation
gravity-aided navigation
marine gravimetry
Eotvos correction
