重力仪检定基线的建立及其误差讨论

1978年5月使用了18台精度较高的重力仪在南京和北京分别建立了地震系统的重力检定场.本文结合以上成果和有关重力比较测定的资料, 从分析格值变化的各种因素及其产生的误差入手, 说明仪器格值标定的重要性和具体要求, 提出了选建地震系统重力检定场的方法技术和减小格值误差、提高测量精度的可能途径.

ESTABLISHMENT OF A BASE LINE FOR CALIBRATING GRAVIMETERS AND DISCUSSION OF THE ERRORS INVOLVED

This base line for calibrating gravimeters for seismological purposes was established by 18 high precision gravimeters in Nanking and Peking in May 1978. In this paper, the results has been combined with the data from related gravity comparative measurements. From the analysis of the factors causing the variations of scale values of the gravimeters and the errors of measurements thus procured, the importance and requirements for calibration of gravimeters have been discussed. Then the method and technique to select and to establish the base line for calibrating gravimeters for seismological work and the possible ways for reducing calibration error in order to increase the accuracy of gravity measurenents are proposed.