A precise geoid model of Bosnia and Herzegovina by the KTH method and its validation

IF 1.2 4区地球科学 Q3 ENGINEERING, CIVIL

Survey Review Pub Date : 2023-01-04 DOI:10.1080/00396265.2022.2163361

Dževad Krdžalić, Ramazan Alpay Abbak

引用次数: 0

Abstract

We compute the first gravimetric geoid model for Bosnia and Herzegovina (BHG2022) based upon the KTH method and additive corrections. The BHG2022 is computed with the help of 34,820 terrestrial gravity points and a digital elevation model produced by the Shuttle Radar Topography Mission. The gravity data is gridded onto a 0.02 arc-degree resolution via the nearest neighbour interpolation method. ITU_GGC16 and ITG-Grace2010 models are utilised to provide long wavelengths of gravity field up to 280 and 180 maximum degree/order in the geoid computation, respectively. On the basis of an external evaluation by 609 Global Navigation Satellite System (GNSS)-levelling points homogeneously distributed over the country, the accuracy of the BHG2022 is estimated to be 5.65 cm absolutely. This is the most precise geoid model ever seen in this territory. The result highlights the significant effect of all gravity data obtained from various sources on the accuracy of the geoid model.

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用KTH方法建立波斯尼亚和黑塞哥维那大地水准面精确模型及其验证

基于KTH法和加性修正，计算了波黑首个重力大地水准面模型(BHG2022)。BHG2022是在34,820个地面重力点和航天飞机雷达地形任务生成的数字高程模型的帮助下计算的。重力数据通过最近邻插值法网格化到0.02角度分辨率。ITU_GGC16和ITG-Grace2010模型在大地面线计算中分别提供最大280度/阶和180度/阶的重力场长波长。根据609个全球导航卫星系统(GNSS)调平点在全国均匀分布的外部评估，BHG2022的绝对精度估计为5.65 cm。这是在这片土地上见过的最精确的大地水准面模型。结果表明，各种来源的重力数据对大地水准面模型的精度有显著影响。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Survey Review 地学-地球科学综合

CiteScore

3.50

自引率

6.20%

发文量

审稿时长

6 months

期刊介绍： Survey Review is an international journal that has been published since 1931, until recently under the auspices of the Commonwealth Association of Surveying and Land Economy (CASLE). The journal is now published for Survey Review Ltd and brings together research, theory and practice of positioning and measurement, engineering surveying, cadastre and land management, and spatial information management. All papers are peer reviewed and are drawn from an international community, including government, private industry and academia. Survey Review is invaluable to practitioners, academics, researchers and students who are anxious to maintain their currency of knowledge in a rapidly developing field.