湖南省似大地水准面2017模型及精度分析

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英文篇名：Hunan 2017 GNSS Gravity Quasi-Geoid Model and Its Precision Analysis 作者：董明旭 ; 李建成 ; 华亮春 ; 姜卫平 ; 尹昊华 ; 敖敏思 ; 曾翔强 英文作者：DONG Mingxu;LI Jiancheng;HUA Liangchun;JIANG Weiping;YIN Haohua;AO Minsi;ZENG Xiangqiang;Hunan Institute of Geomatics Science and Technology;GNSS Research Center,Wuhan University; 关键词：似大地水准面 ; 全球定位系统 ; 水准测量 ; 重力 ; 精度分析 英文关键词：quasi-geoid;;global positioning system;;leveling measurement;;gravity;;precision analysis 中文刊名：大地测量与地球动力学 英文刊名：Journal of Geodesy and Geodynamics 机构：湖南省测绘科技研究所;武汉大学卫星导航定位技术研究中心; 出版日期：2019-01-15 出版单位：大地测量与地球动力学 年：2019 期：01 基金：国家自然科学基金(41371335);; 湖南省重点研发计划(2016SK2002);; 湖南省科学技术厅战略性新兴产业项目(2016GK4010);湖南省科学技术厅中央引导地方专项(2017KT5001);; 长沙市科技计划(KQ1701171);; 湖南省科技创新平台与人才计划(2018TP2040)~~ 语种：中文; 页：70-75 页数：6 CN：42-1655/P ISSN：1671-5942 分类号：P223.0

摘要

利用近7万个湖南及邻近省份重力观测数据、502个GNSS/水准控制点及数字高程模型,以EIGEN-6C4全球重力场模型作参考重力场,采用顾及地球曲率影响的各类地形质量位及引力的第二类Helmert凝集法严密算法,利用高分辨率地形数据恢复甚短波扰动重力场,确定空间分辨率2′×2′的高精度湖南省似大地水准面模型(HNGG2017)。经外部检核,模型整体精度均优于±0.022m。与历史模型相比,新模型在湖南北部常德汉寿、西南部永州江永等地区精度得到显著改善。
        Using nearly 70 000 gravity observation data,SRTM topographic data and GNSS/leveling control points data from Hunan and nearby districts,the EIGEN-6C4 global gravity fields model is taken to be the reference gravity field.And the Stokes-Helmert approach and spherical cap harmonic analysis are conducted to construct the 2′×2′resolution Hunan GNSS gravity geoid model(HNGG2017).The precision test shows that the external error range is±0.022 m.Compared to the historic model,the error of the new model in north areas such as Changde Hanshou and southwest areas such as Yongzhou Jiangyong are significantly reduced.

引文

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