重力测量中双程往返重复观测零点校正的简易计算法

A SIMPLIFIED WAY OF CALCULATION OF THE TWO-WAY RECIPROCAL MEASUREMENT ON ZERO CALIBRATION IN GRAVIMETER SURVEY

地质矿产部石油物探研究所

在重力测量中,双程往返重复观测的零点位移率,以往常用作图法或以作图法为基础的计算法求取,但前者不够精确,后者又很繁杂。本文介绍一种准确可靠的简易计算法。它根据作图法原理,由线性回归分析法导出,只有两个步骤。(1)求取每一重复观测点的两次观测时间差和重力观测值差;(2)用公式直接求得仪器在该段时间内的零点位移移率。

In gravimeter survey, the zero drift rate from two-way reciprocal measurement conventionally evaluated by constructing or based upon it. However, the former is not so precise but the latter appears rather too complicated.The author would like to present readers an accurate, dependable and simplified way of calculation. It is based on the principle of constructing method and deducted by linear regression analysis. Actually, there are two steps: ①To evaluate the time difference from two times of measurement and the difference from gravimetry; ②To evaluate zero drift of the unit right away within the fixed time.