借助EGM2008的海域重力异常反距离加权插值算法  

An Inverse Distance Interpolation Algorithm of Marine Gravity Anomaly Uniting EGM2008 Gravity Field Model

作　　者：曾敏 汪振华[2] 邓凯亮[3] 何水原 ZENG Min;WANG Zhenhua;DENG Kailiang;HE Shuiyuan(91650 Troops,Guangzhou 510320,China;Naval Press,Tianjin 300450,China;Naval Institute of Hydrographic Surveying and Charting,Tianjin 300061,China;Guangzhou Marine Geological Survey,CGS,Ministry of Land and Resources,Guangzhou 510760,China)

机构地区：[1]91650部队 [2]海军出版社 [3]海军海洋测绘研究所 [4]中国地质调查局广州海洋地质调查局

出　　处：《海洋测绘》2018年第2期5-7,共3页Hydrographic Surveying and Charting

基　　金：国家重点研发计划(2016YFC0303007;2016YFB0501704);国家自然科学基金(41474012;41374018);国家重大科学仪器设备开发专项(2011YQ12004503);国防973计划(613219)

摘　　要：构建高精度高分辨率的海域重力异常模型,是将海洋重力测量数据应用于全球高程基准统一和水下重力匹配导航等技术领域的关键步骤之一。针对反距离加权插值算法仅利用了海域重力观测值的空间信息,没有考虑重力观测值物理特性的缺陷,提出一种借助EGM2008重力场模型构建海域重力异常模型的反距离插值算法。以DTU10重力异常数值模型为基础数据,设计了海域重力测量数据格网化实验,结果表明本文算法能有效改进海域重力异常格网模型的计算精度。The construction of high-precision and high-resolution gravity anomaly model is one of the key steps in the application of ocean gravity measurement data to global elevation baseline and underwater gravity matching navigation.The inverse distance weighted interpolation algorithm uses only the spatial information of the gravity observations in the sea area,but does not take into account the physical characteristics of the gravity observations.An inverse distance interpolation algorithm is proposed based on the gravity field model of the EGM2008 gravity model.Based on the numerical model of gravity anomaly DTU10,the gridding experiment of gravity data of sea area is designed.The results show that the proposed algorithm can effectively improve the calculation precision of gravity anomalies grid model.

关 键 词：海洋重力测量 海域重力异常格网模型 反距离加权插值算法 EGM2008重力场模型 DTU10重力异常数值模型 

分 类 号：P223[天文地球—大地测量学与测量工程]