西太多金属结核区国外海洋重力数据精度评估  

Accuracy evaluation of international marine gravity data in western Pacific polymetallic nodule area

作　　者：孔敏[1] 田先德[1] 王风帆 刘志杰[1] KONG Min;TIAN Xiande;WANG Fengfan;LIU Zhijie(National Marine Data and Information Service,Tianjin 300171,China)

机构地区：[1]国家海洋信息中心,天津300171

出　　处：《测绘科学》2022年第10期52-58,共7页Science of Surveying and Mapping

基　　金：科技部“十四五”重点研发项目(2021YFC3101600);全球变化与海气相互作用专项(GASI);国家海洋信息中心青年基金项目(202101002)

摘　　要：针对西太平洋多金属结核区的国际共享海洋重力船测数据精度不确定问题,该文联合相关分析、定量评估及图形可视化等方法,开展了基于多源数据联合检核的国外海洋重力数据精度评估,并对引起精度评估的误差来源进行了分析。结果显示:国外共享海洋重力数据记录的空间信息准确且精度较高;与国内大洋调查数据相比最大的误差来源于系统差,消除系统差后数据精度可达3~5 mGal;与国际通用的海洋重力场SS模型相比,两者重力异常平面展布特征一致,外符合精度优于5 mGal。Aiming at the uncertainty of the international shared marine gravity accuracy in the western Pacific polymetallic nodule area,this paper evaluated the marine gravity data based on external multi-source data,using the methods of correlation analysis,quantitative evaluation and graphic visualization,while the error sources causing accuracy evaluation were analyzed.The results showed that the spatial information of the shared marine gravity data was accurate.Compared with the domestic ocean survey data,the biggest error came from the system error,and the data accuracy would reach 3~5 mGal after eliminating the system error.Compared with the SS model of marine gravity field,the plane distribution characteristics of gravity anomalies were consistent,and the external coincidence accuracy was better than 5 mGal.

关 键 词：多金属结核 海洋重力 精度评估 系统差 

分 类 号：P229[天文地球—大地测量学与测量工程]