航空科学技术2023，Vol.34Issue(12)：93-99,7.DOI:10.19452/j.issn1007-5453.2023.12.011
航空重力测量重复测线数据处理技术研究
Research on Data Processing Technology for Repeated Survey Lines in Aerial Gravity Measurement
摘要
Abstract
Aerodynamic gravity measurement is an effective means of quickly obtaining information about the earth's gravity field,and the data processing technology of high-precision extraction of gravity information from a wide range of noise plays an important role.This paper first analyzes the sources and error characteristics of measurement noise,and clarifies that commonly used FIR low-pass filters at present can effectively filter out high-frequency noise.Secondly,an error separation method based on Empirical Mode Decomposition(EMD)is proposed for dynamic characteristic errors and accidental errors.Then,a system adjustment method suitable for multiple repeated survey lines was proposed,which effectively suppresses the impact of low-frequency system errors.Finally,the measured aviation data is processed.The experimental results show that the EMD based error separation method improves the internal coincidence accuracy from 2.86mGal to 0.75mGal,and the repeated line system adjustment method further improves the accuracy to 0.28mGal.This study is of great significance for improving the maturity and practicality of airborne gravity measurement systems in data processing technology.关键词
航空重力测量/数据处理/经验模态分解/系统平差/重复测线Key words
aerial gravity measurement/data processing/empirical mode decomposition/system adjustment/repeated survey lines分类
交通工程引用本文复制引用
李新宇,周召发,张志利,常振军,郝诗文..航空重力测量重复测线数据处理技术研究[J].航空科学技术,2023,34(12):93-99,7.基金项目
航空科学基金(201808U8004) Aeronautical Science Foundation of China(201808U8004) （201808U8004）
