摘要
以观测数据与DDW潮汐模型之差的均方根和重力残差为约束,对基于M2潮波标定gPhone重力仪格值系数的方法进行改进。利用改进方法对连续重力台网内的9台gPhone重力仪格值系数进行标定,基于M2潮波相对误差、残差振幅谱均方根等指标对标定结果进行精度评定,并与FG5绝对重力仪比测法、M_(2)潮波标定法进行比较。结果表明,改进方法的M2潮波潮汐因子与理论固体潮模型平均相对误差提高到0.2152%,残差振幅谱均方根平均达到1.6902μGal,与FG5比测法精度相当,优于M2潮波标定法。最后,讨论格值系数分布规律以及重力残差矢量与台站所在位置的经度依赖关系。
Using the RMS of the difference between the observed data and the DDW tidal model and the gravity residuals as constraints,we improve the calibration method of gPhone gravimeter scale factor based on M 2 wave.Using the improved method,we calibrate 9 gPhone gravimeters in the continuous gravity network.We evaluate the accuracy of the calibration results based on the relative error of M_(2) tidal wave and the RMS of the residual amplitude spectrum,and compare them with the FG5 comparison method and the M 2 tidal wave calibration method.The results show that the average relative error between the M_(2) tidal wave tidal factor and the theoretical solid tide model is improved to 0.2152%,and the RMS of the residual amplitude spectrum reaches 1.6902μGal under the improved method of this paper,which is comparable to the accuracy of the FG5 comparison method and better than the M 2 tidal wave calibration method.At last,we discuss the distribution regularity of the scale factor and the longitude dependence of the gravity residual vector on the location of the station.
作者
赵亚博
胡敏章
韦进
江颖
张晓彤
刘子维
ZHAO Yabo;HU Minzhang;WEI Jin;JIANG Ying;ZHANG Xiaotong;LIU Ziwei(Institute of Seismology,CEA,40 Hongshance Road,Wuhan 430071,China)
出处
《大地测量与地球动力学》
CSCD
北大核心
2023年第8期826-831,共6页
Journal of Geodesy and Geodynamics
基金
国家自然科学基金(41974021,41204058)
中国地震局地震科技星火计划(XH20039)
武汉引力与固体潮国家野外科学观测研究站开放基金(WHYWZ20206)。
