LaCoste-Romberg G型重力仪的漂移探讨

DISCUSSION ON THE DRIFTS OF LACOSTEROMBERG MODEL G GRAVIMETERS

本文针对LaCoste-Romberg G型重力仪(下文简称为LCR-G型重力仪)长期、中期、短期及静态漂移问题进行了探讨。从大量观测数据及曲线中发现,LCR-G147、LCR-G570及LCR-G596三台重力仪的漂移均存在着年变化。对8年来观测数据分析后,得出结论:如果同一测段两个往返时间差不超过1小时,一般就不必进行漂移改正,并不影响观测结果的可靠性。

In this paper the problem of the long-term, intermediates-term, short-term and static drifts of LaCoste-Romberg Model G Gravimeters is discussed. It is found from a large number of observation data and drift curves that the drifts of LCRG147, LCR-G570 and LCR-G596 Gravimeters show an annual variation. Analysis of the observation data for eight years leads us to conclude that if the time difference between the observations at both sites on the same profile does not exceed one hour, correction of drifts is not nscessary in general; and the observation result is not affected.