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

doi:10.13474/j.cnki.11-2246.2023.0249

Abstract

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

CLC Number:

P223

JIN Xinyang, WANG Bin, LIU Xiaoyun, GUO Xinwei, TIAN Jie. Analysis of feasibility on re-refinement of provincial quasi-geoid[J]. Bulletin of Surveying and Mapping, 2023, 0(8): 151-154.

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