测绘通报 ›› 2023, Vol. 0 ›› Issue (8): 151-154.doi: 10.13474/j.cnki.11-2246.2023.0249

• 技术交流 • 上一篇    下一篇

省级似大地水准面再精化可行性分析

靳鑫洋, 王斌, 刘晓云, 郭鑫伟, 田婕   

  1. 自然资源部大地测量数据处理中心, 陕西 西安 710054
  • 收稿日期:2022-10-10 发布日期:2023-09-01
  • 通讯作者: 刘晓云。E-mail:21335949@qq.com
  • 作者简介:靳鑫洋(1991-),男,硕士,工程师,主要从事大地测量数据处理研究工作。E-mail:xyjin_whu@163.com
  • 基金资助:
    国家自然科学基金(41774004;41904040)

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

JIN Xinyang, WANG Bin, LIU Xiaoyun, GUO Xinwei, TIAN Jie   

  1. Geodetic Data Processing Center of Ministry of Natural Resources, Xi'an 710054, China
  • Received:2022-10-10 Published:2023-09-01

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。

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

Abstract: 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.

Key words: GNSS/leveling, provincial quasi-geoid, re-refinement, feasibility, inverse distance weighting method

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