【摘要】 作者对豫北地区流动重力观测资料进行了自由网平差计算。结果发现,1983年6月至1984年9月,豫北地区重力场呈现了一规律性变化,最大差异性变化达220微伽。进一步的研究发现,豫北地区重力点值变化的空间分布图象与重力点值的空间分布图象十分相象,两者间的相关系数高达0.88。这表明重力仪格值存在着明显的系统误差。经回归改正计算后,豫北地区重力场除了个别段点外,其异常变化基本消除。如何判明和消除重力仪格值系统误差对重力复测的影响是长期以来未能得到有效解决的问题。本文应用的方法为解决这一问题提供了一种行之有效的途径。更多还原

【Abstract】 Authors carried out free not adjustment calculation for the data of portable gravimetric measurement in North Henan. It was found that there appeared a regular variation of gravity field in North Henan from June, 1983 to Sep., 1984 and the greatest discrepant variation value amounted to 220 microgals. Trough further study, it was detected that the space distribution patterns of gravity point values and their variations were very alike. The correlation analysis pointed out that the correlation coefficient between them reached highly 0.88. Hence,it was shown that there existed obvious systematic error of gravimeter calibration. Through regression treatment, the anomalous variations of gravity field in North Henan were basically eliminated, except for one or two measuring points. How to distinguish the systematic error of gravimeter calibration and eliminate its influence upon the results of gravity reiteration is a problem which has not been solved for a long time. The method given in this paper provides a more effective way to solve this problem.更多还原