动态与静态平差方法在流动重力数据处理中的对比研究  

A Comparative Study of Dynamic and Static Adjustment Methods in Mobile Gravity Data Processing

作　　者：郝洪涛 隗寿春 韦进 刘少明 胡敏章 HAO Hongtao;WEI Shouchun;WEI Jin;LIU Shaoming;HU Minzhang(Key Laboratory of Earthquake Geodesy,CEA,40 Hongshance Road,Wuhan 430071,China;Hubei Earthquake Agency,40 Hongshance Road,Wuhan 430071,China;The Second Monitoring and Application Center,CEA,316 Xiying Road,Xi’an 710054,China)

机构地区：[1]中国地震局地震大地测量重点实验室,武汉市430071 [2]湖北省地震局,武汉市430071 [3]中国地震局第二监测中心,西安市710054

出　　处：《大地测量与地球动力学》2022年第8期783-789,共7页Journal of Geodesy and Geodynamics

基　　金：中国地震局地震研究所和应急管理部国家自然灾害防治研究院基本科研业务费(IS201926302,IS20176162);武汉引力与固体潮国家野外科学观测研究站开放基金(WHYWZ202103);国家自然科学基金(41304059);中国地震局地震行业科研专项(201508009)。

摘　　要：为研究重力时变因素对流动重力网数据处理结果的影响,利用动态和静态2种平差方法对南北地震带南段流动重力观测数据进行处理,并对2种方法的重力变化结果进行对比分析。结果表明:1)重力时变因素会导致静态平差方法计算的重力变化结果存在误差,对0.5 a和1 a时间尺度下的重力变化具有较为明显的影响,但对2 a以上时间尺度下的重力变化影响较小,因此计算0.5 a和1 a时间尺度下的重力变化时宜采用动态平差方法;2)研究区内九寨沟7.0级、长宁6.0级和漾濞6.4级地震的发震地点与重力变化零值线具有较好的对应关系,重力变化图像可反映3次地震的发震背景。To analyze the influence of the time-varying gravity factors on mobile gravimetry data processing,we use static and dynamic adjustment methods to process gravimetry data in the area of southern segment of the north-south seismic belt,comparing the results of the two methods.The results show that:1)The time-varying gravity factors cause errors in the gravity changes by the static adjustment method,which have a relatively obvious impact on gravity variations of the 0.5 a and 1 a time scales,but less impact on the gravity variations of more than 2 a time scale.Therefore,it is appropriate to use the dynamic adjustment method to calculate the 0.5 a and 1 a time scales gravity variations.2)The locations of the Jiuzhaigou M7.0,Changning M6.0 and Yangbi M6.4 earthquakes have a good corresponding relationship with the zero-value of gravity variations.The gravity variations image reflects the seismogenic background of the 3 earthquakes.

关 键 词：流动重力观测 静态平差 动态平差 重力变化 

分 类 号：P312[天文地球—固体地球物理学]