地震地磁观测与研究2017，Vol.38Issue(4)：172-182,11.DOI:10.3969/j.issn.1003-3246.2017.04.029
陕西重力测网起算基准稳定性分析
Stability analysis of the calculation datum of Shaanxi Gravity Network
摘要
Abstract
When using the classical adjustment method to deal with the data of the gravity network data,it is a key problem to judge whether the calculation datum is stable or not.Based on the fine processing observation data of Shaanxi Gravity Network,we used the linear regression method to analyze the calculation datum stability of Shaanxi Gravity Network between 1992 and 2011.And taking the Jingyang Ms 4.8 earthquake as an example,the effect of stability of gravity on the calculation of gravity network and the validity of the linear regression method are analyzed.The results show that:(1) The initial gravity value of the calculation datum is obviously changed with time;(2) After correcting the value of calculation datum gravity,the variation characteristics of gravity field and gravity segment difference crossing the faults before and after the earthquake is more close to the truth;(3) When dealing with the gravity data and analyzing the characteristics of the gravity field,the influence of the calculation datum stability must be taken into account.关键词
陕西重力测网/重力平差/起算基准稳定性/线性回归法Key words
Shaanxi Gravity Network/gravity adjustment/calculation datum stability/linear regression method引用本文复制引用
张永奇,韩美涛,曹建平,丁晓光,翟宏光,郑增记..陕西重力测网起算基准稳定性分析[J].地震地磁观测与研究,2017,38(4):172-182,11.基金项目
2016年三结合课题(项目编号:162704) （项目编号:162704）
陕西省起航与创新基金(项目编号:201514) （项目编号:201514）
