Results 191 to 200 of about 32,946 (237)
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Survey Review, 2023
The objective of this research is to assess temporal variations of orthometric/normal height (ΔH/ΔH*) at proposed International Height Reference Frame (IHRF) sites. GRACE/GRACE-FO-based Global Geopotential Models were utilized to determine temporal variations of geoid/quasigeoid height (ΔN/Δζ) and time-dependent changes of ellipsoidal height (Δh ...
Yadeta, Samuel Milki +3 more
openaire +3 more sources
The objective of this research is to assess temporal variations of orthometric/normal height (ΔH/ΔH*) at proposed International Height Reference Frame (IHRF) sites. GRACE/GRACE-FO-based Global Geopotential Models were utilized to determine temporal variations of geoid/quasigeoid height (ΔN/Δζ) and time-dependent changes of ellipsoidal height (Δh ...
Yadeta, Samuel Milki +3 more
openaire +3 more sources
Local quasigeoid modeling at Argentinean stations of the International Height Reference Frame (IHRF)
Journal of GeodesyAgustín R. Gómez +3 more
openaire +2 more sources
Journal of South American Earth Sciences
Gabriel do Nascimento Guimarães +2 more
openaire +2 more sources
Gabriel do Nascimento Guimarães +2 more
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Optimum Design of Transmission Line Crossing without Crossing Frame
2022 2nd International Conference on Electrical Engineering and Control Science (IC2ECS), 2022In this paper, the research on the crossing scheme of transmission line without crossing frame is carried out, mainly including the distance between crossing sag and crossing objects, selection of tower position, research on optimum sequence of crossing ...
Xiaoli Xu +6 more
semanticscholar +1 more source
Towards a Global Unified Physical Height System
, 2021The International Association of Geodesy (IAG), as the organisation responsible for advancing Geodesy, introduced in 2015 the International Height Reference System (IHRS) as the global conventional reference system for the determination of gravity field ...
L. Sánchez +3 more
semanticscholar +1 more source
2023
In recent years, a significant challenge for geodesy has been the introduction of a global height reference system and the consideration of its regional or national applications. According to the Global Geodetic Observing System (GGOS) recommendations, providing and maintaining accurate and stable reference systems is highly desirable.
Dorota Marjańska +2 more
openaire +1 more source
In recent years, a significant challenge for geodesy has been the introduction of a global height reference system and the consideration of its regional or national applications. According to the Global Geodetic Observing System (GGOS) recommendations, providing and maintaining accurate and stable reference systems is highly desirable.
Dorota Marjańska +2 more
openaire +1 more source
Structural Engineering International, 2020
Joints are the key factors that determine the construction difficulty and structural safety of prefabricated steel structures. However, the existing prefabricated joints of square steel tube and H-shaped steel beam frame have few reference forms, and ...
Zhiwei Zhang +5 more
semanticscholar +1 more source
Joints are the key factors that determine the construction difficulty and structural safety of prefabricated steel structures. However, the existing prefabricated joints of square steel tube and H-shaped steel beam frame have few reference forms, and ...
Zhiwei Zhang +5 more
semanticscholar +1 more source
Geophysical Journal International
High-precision geoid models have traditionally been static, neglecting temporal variations. However, achieving geoid accuracy within 1–2 cm and maintaining dynamic height reference frames necessitates consideration of geoid spatiotemporal variations ...
Pengfei Xu +5 more
semanticscholar +1 more source
High-precision geoid models have traditionally been static, neglecting temporal variations. However, achieving geoid accuracy within 1–2 cm and maintaining dynamic height reference frames necessitates consideration of geoid spatiotemporal variations ...
Pengfei Xu +5 more
semanticscholar +1 more source
Dependence of seasonal phenomena in coordinate time series on GNSS antenna mounting height
Advances in Geodesy and GeoinformationThe purpose of this paper is analysing the correlation between the magnitude of the annual amplitude of seasonal changes in the coordinate components of GNSS reference stations and the height of the antenna mounting above the ground.
Kamil Maciuk +6 more
semanticscholar +1 more source