远海测量重力仪漂移量估测方法研究

在海洋重力测量中,需要获知重力仪漂移量,作业规程中对漂移量确定方法已有详细规定,但对于测量周期长、测量期间中断作业的情况,作业规程还缺少这方面的规定,因此针对这些情况研究重力仪漂移量测量方法是必要的。据此提出定点复测和重复测线比对两种方法,以达到估算测量期内重力仪漂移量的目的,给出适用于远海长周期重力测量的重力仪漂移量估测方法。根据某航次实测数据的对比分析,发现两种方法均取得了较好的效果,可有效提高数据精度,但每种方法各有应用限制,需要根据实际情况选择使用。

Research for the Method of Gravimeter Drifting Value Estimation in Open Sea

The zero drifting value of gravimeter is required during the marine gravity measurement, there are detailed rules in operating procedures about calculation of zero drifting value,but rules for determination method for drifting value is lacked when the measuring time is long or work breaks off,so it is important to do research on the method of drifting value determination for this special case.We propose two methods including fixed place repeated measurement and survey line repeated measurement which are suitable for long period measurement in open sea.Based on the result of a sample,we found that the two methods can achieve the same effect and then improve the data accuracy,however,the methods have different restrictive conditions so we need to choose which method is suitable based on the reality.