The new gravity system—changes in international gravity base values and anomaly values
The new gravity system—changes in international gravity base values and anomaly values
复制标题
新重力系统——国际重力基础值和异常值的变化
DOI：
10.1190/1.1441012
复制
发表时间：
1979
期刊：
影响因子：
3.3
通讯作者：
G. Woollard
中科院分区：
文献类型：
--
作者：
G. Woollard
对以下两方面进行了评估：（1）Morelli等人（1974年）的IGSN 71值中包含的绝对重力基准面和标准的变化的可靠性;（2）这些变化以及定义海平面理论重力值的新国际重力公式（大地参考系1967）中包含的变化对重力异常值的影响。华盛顿，华盛顿特区之间摆距与现代绝对重力距的比较英国泰丁顿;法国巴黎;和波茨坦的资料表明，对波茨坦基准面的14 mgal改正，其改正误差在0.03 ± 0.016 mgal之内。虽然IGSN 71值中偶尔出现0.1 mgal量级的差异，但一般而言，其可靠性约为±0.05 mgal。然而，在费尔班克斯和费尔班克斯之间的现代绝对重力测定范围内，IGSN 71值所定义的重力标准中，每1000毫伽的绝对重力存在约-0.03毫伽的差异。
An assessment is made of (1) the reliability of the changes in the absolute gravity datum and standard incorporated in the IGSN 71 values of Morelli et al (1974), and (2) the effect of these changes and those incorporated in the new international gravity formula (Geodetic Reference System 1967) defining theoretical gravity values at sea level on gravity anomaly values. Pendulum‐interval comparisons with modern absolute gravity intervals between Washington, D.C.; Teddington, England; Paris, France; and Potsdam, East Germany indicate that the correction of 14 mgal to the Potsdam datum is correct to within .03 ± .016 mgal. Although there appear to be occasional discrepancies in the IGSN 71 values of the order of 0.1 mgal, in general their reliability appears to approximate ±0.05 mgal. A discrepancy of approximately −0.03 mgal per 1000 mgal of absolute gravity is indicated, however, in the gravity standard defined by the IGSN 71 values over the range of modern absolute gravity determinations between Fairbanks...