大地测量与地球动力学2017，Vol.37Issue(4)：403-406,4.DOI:10.14075/j.jgg.2017.04.016
零漂改正对中国地壳运动观测网络重力数据处理的影响
Impacts of Zero Drift Correction in CMONOC Data Processing
摘要
Abstract
Based on CMONOC mobile gravity data from 2000,zero drift characteristics of 18 LCR-G relative gravimeters are studied.The results show that zero drift rate of gravimeter may sometime shave a significant change,up to 10 μGal/h.Based on different processing methods of zero drift correction,the results of traditional and improved adjustment models are compared.Given the same priori error,the posterior error of the traditional adjustment model is 39 μGal,and its average accuracy of gravity value is 26.5 μGal;however,for the improved adjustment model,its posterior error is 16.5 μGal and the average accuracy of gravity value is 11.2 μGal.The accuracy of the improved model is much higher than that of the traditional adjustment model.The comparison shows that computing the zero drift correction by circuit in the data preprocessing can effectively eliminate the error of significant change of zero drift.The improved model is superior to traditional adjustment model that assumes the zero drift as a constant.关键词
流动重力测量/零点漂移/平差模型Key words
mobile gravity observation/zero drift/adjustment model分类
天文与地球科学引用本文复制引用
隗寿春,徐建桥,郝洪涛,韩宇飞..零漂改正对中国地壳运动观测网络重力数据处理的影响[J].大地测量与地球动力学,2017,37(4):403-406,4.基金项目
National Key Basic Research Program of China,No.2014CB845902 （）
National Natural Science Foundation of China,No.41274085,41304059.国家973计划(2014CB845902) （2014CB845902）
国家自然科学基金(41274085,41304059). （41274085,41304059）
