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Determining the new height of Mount Qomolangma based on the International Height Reference System

التفاصيل البيبلوغرافية
العنوان: Determining the new height of Mount Qomolangma based on the International Height Reference System
المؤلفون: Yamin Dang, Tao Jiang, Chunxi Guo, Bin Chen, Chuanyin Zhang, Qiang Yang, Zhengtao Wang
المصدر: Geo-spatial Information Science, Pp 1-10 (2023)
بيانات النشر: Taylor & Francis Group, 2023.
سنة النشر: 2023
المجموعة: LCC:Mathematical geography. Cartography
LCC:Geodesy
مصطلحات موضوعية: Airborne gravity, International Height Reference System, Mount Qomolangma, geoid, 2020 Qomolangma Height Survey, Mathematical geography. Cartography, GA1-1776, Geodesy, QB275-343
الوصف: ABSTRACTTo achieve the goal that China and Nepal jointly announce the new height of Mount Qomolangma (MQ), the campaign of Qomolangma Height Survey (QHS) was carried out from 2019 to 2020. A high precision geoid model realizing the common height datum for both sides is necessary for determining the unique height of MQ. However, high altitude and rugged topography make it extremely difficult to conduct terrestrial gravity measurements in this region, the accuracy of geoid model is restricted by terrestrial gravity data gaps. In the campaign of 2020 QHS, the airborne gravity survey was carried out over MQ and its surrounding areas, the airborne gravity data covering an area of 12,700 km2 were successfully collected. For the first time, the high precision observations of terrestrial gravity and BeiDou Navigation Satellite System (BDS) at the peak of MQ were collected. These datasets pave the way for the precise determination of the orthometric height of MQ. According to the definition of the International Height Reference System (IHRS), we developed the IHRS-based gravimetric quasigeoid model by combining the airborne and terrestrial gravity data. Validations against highly accurate GNSS leveling data at 61 benchmarks demonstrate that the accuracy of the quasigeoid model is 3.8 cm, and the addition of airborne gravity data improves the accuracy by 51.3%. Based on the IHRS, the final orthometric height of the snow surface of the peak of MQ is determined to be 8848.86 m.
نوع الوثيقة: article
وصف الملف: electronic resource
اللغة: English
تدمد: 10095020
1993-5153
1009-5020
Relation: https://doaj.org/toc/1009-5020; https://doaj.org/toc/1993-5153
DOI: 10.1080/10095020.2022.2128901
URL الوصول: https://doaj.org/article/7cafdab571c242169e156e8e68ec6452
رقم الأكسشن: edsdoj.7cafdab571c242169e156e8e68ec6452
قاعدة البيانات: Directory of Open Access Journals
الوصف
تدمد:10095020
19935153
DOI:10.1080/10095020.2022.2128901