省级似大地水准面再精化可行性分析  

Analysis of feasibility on re-refinement of provincial quasi-geoid

作　　者：靳鑫洋 王斌 刘晓云 郭鑫伟 田婕 JIN Xinyang;WANG Bin;LIU Xiaoyun;GUO Xinwei;TIAN Jie(Geodetic Data Processing Center of Ministry of Natural Resources,Xi'an 710054,China)

机构地区：[1]自然资源部大地测量数据处理中心,陕西西安710054

出　　处：《测绘通报》2023年第8期151-154,共4页Bulletin of Surveying and Mapping

基　　金：国家自然科学基金(41774004,41904040)。

摘　　要：GNSS和水准成果是研究似大地水准面精化的重要控制数据,充分发挥GNSS水准高精度的优势,有利于提升似大地水准面模型的精度。本文针对已有省级似大地水准面模型现势性不够和精度偏低的问题,提出了省级似大地水准面再精化方案,利用新的GNSS水准成果,采用反距离加权法对已有似大地水准面进行拟合纠正,并与常规完整精化方案作对比分析,研究其可行性。试验结果表明,省级似大地水准面再精化方案可在一定程度上提升水准面精度,3个试验区提升比例分别为24%、38%和41%,但提升幅度不如常规精化方案。试验结论对今后省级似大地水准面精化工作有一定的参考意义。GNSS and leveling results are important control data for studying the refinement of quasi-geoid.Giving full play to the advantages of high-precision of GNSS/leveling is conducive to improving the precision of quasi-geoid model.Aiming at the problems that the existing provincial quasi-geoid models are insufficiently currency and their precision is low,a provincial quasi-geoid re-refinement scheme is proposed.Firstly,using the new GNSS/leveling results,the inverse distance weighting method is used to fit and correct the existing quasi-geoid.Secondly,compared with the conventional complete refinement scheme to study its feasibility.Results show that the provincial quasi-geoid re-refinement scheme can improve the precision of the quasi-geoid models to a certain extent,and the improvement ratios in the three experimental areas are 24%,38%and 41%,but the improvement is not as good as the conventional refinement scheme.The conclusions have certain reference significance for the future provincial quasi-geoid refinement.

关 键 词：GNSS水准 省级似大地水准面 再精化 可行性 反距离加权法 

分 类 号：P223[天文地球—大地测量学与测量工程]