航空重力梯度的多参量位场转换  

Multi-parameter Potential Field Conversion for Airborne Gravity Gradient Data

作　　者：赵德军 赵东明[1] 谢心和 ZHAO Dejun;ZHAO Dongming;XIE Xinhe(Information Engineering University, Zhengzhou 450001, China;Xi’ an Division of Surveying and Mapping, Xi’ an 710054, China)

机构地区：[1]信息工程大学,河南郑州450001 [2]西安测绘总站,陕西西安710054

出　　处：《测绘科学技术学报》2021年第1期15-20,共6页Journal of Geomatics Science and Technology

基　　金：国家自然科学基金项目(41774018,41674082,41574020);国家社会科学基金(军事学)项目(2020-SKJJ-C-043)。

摘　　要：目前广泛使用的非全张量航空重力梯度测量系统,不能测量重力梯度全部张量,限制了航空重力梯度的应用。因此,需要研究航空重力梯度不同分量之间的位场转换。根据重力梯度与扰动重力位内在的频率微分关系,联合多参量在拟合观测参量最优的条件下反演扰动重力位,实现了联合多参量的位场转换。实验表明,相对于传统的单参量位场转换,多参量位场转换能降低观测信号的噪声,有效地提高转换精度。At present,all tensors of gravity gradient can’t be surveyed in the widely used incomplete tensor airborne gravity gradiometry system,which limits the application of airborne gravity gradiometry.Therefore,it is necessary to study the potential field conversion between different components of airborne gravity gradient.According to the inherent frequency differential relationship between the gravity gradient and the disturbed gravity potential,the joint multi parameter inversion of the disturbed gravity potential is realized under the condition of optimal fitting observation parameters.The experiment shows that the multi parameter potential field conversion can reduce the noise of the observation signal and effectively improve the conversion accuracy compared with the traditional single parameter potential field conversion.

关 键 词：航空重力梯度 位场转换 扰动位 傅里叶变换 转换精度 

分 类 号：P223[天文地球—大地测量学与测量工程]