CG-5重力仪零漂特性现况分析

The Drift Characteristics of CG-5 Gravimeter

为研究CG-5相对重力仪目前的零点漂移特性,为数据处理提供依据,拟基于河北省流动重力测区2019年2期资料及测试数据资料,对2台重力仪进行零点漂移的相关计算及分析。结果表明:①两台CG-5重力仪静态观测数据均呈现良好的线性零点漂移特性;②重力仪在静态、动态以及混合零漂分析中得到的零漂率数据平均值接近,仪器依然具有较好的稳定性;③测试过程中发现,测点往返测时间间隔的不一致对零漂率的计算结果具有一定影响。

In order to analysis the current drift characteristics and provide basis for the data processing,we calculated the dynamic and static drift rate of the dual survey observation data of Hebei area during 2019 and the test data.The results show that:(1)the CG-5 gravimeter static observation data shows good linear character;(2)the averages of static,dynamic or mixed zero drift rates are similar,which means the two gravimeters both show well stability;(3)in the measurement,the drift rate will be affected in many cases,such as when the time interval between the measurements is inconsistent.