Determination of local geometric geoid model for Kuwait

IF 1.2 Q4 REMOTE SENSING Journal of Applied Geodesy Pub Date : 2022-07-23 DOI:10.1515/jag-2022-0017
A. Zaki, Yasmeen Elberry, Hamad Al-Ajami, M. Rabah, Rasha Abd El Ghany
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Abstract

Abstract Determining a precise local geoid is particularly important for converting the Global Navigation Satellite System (GNSS) heights to orthometric heights. The geometric method for computing the geoid has been extensively used for a comparatively small region, which, in some points, interpolates geoid heights based on GNSS-derived heights and levelling heights. Several considerations should be considered when using the geometric method to increase the accuracy of a local geoid. Kuwait is used as a test area in this paper to investigate several features of the geometric method. The achievable precision is one of these aspects, the role of the interpolation method, global geopotential models, and the influence of the topographic effect. The accuracy of the local geoid can be substantially enhanced by integrating a geopotential model with a digital terrain model of the research region. It is possible to get a precision of 2–3 cm.
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科威特局部几何大地水准面模型的确定
摘要确定精确的局部大地水准面对于将全球导航卫星系统(GNSS)高度转换为正交高度尤为重要。计算大地水准面高度的几何方法已广泛应用于相对较小的区域,在某些点上,基于gnss导出的高度和水准高度插值大地水准面高度。在使用几何方法提高局部大地水准面精度时,应考虑几个因素。本文以科威特为试验区,探讨了几何方法的几个特点。可实现的精度是这些方面之一,插值方法的作用,全球地势模型,以及地形效应的影响。将地势模型与研究区域的数字地形模型相结合,可大大提高局部大地水准面精度。可以得到2-3厘米的精度。
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来源期刊
Journal of Applied Geodesy
Journal of Applied Geodesy REMOTE SENSING-
CiteScore
2.30
自引率
7.10%
发文量
30
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