Results 11 to 20 of about 1,948 (180)

Comparison of global geopotential models from the champ and grace missions for regional geoid modelling in Turkey [PDF]

Studia Geophysica Et Geodaetica, 2009
The continuous efforts on establishment and modernization of the geodetic control in Turkey include a number of regional geoid models that have been determined since 1976. The recently released gravimetric Geoid of Turkey, TG03, is used in geodetic applications where GPS-heights need to be converted to the local vertical datum.
Michael Sideris, Bihter Erol, Erol Bihter   +2 more
exaly   +6 more sources

ANALYSIS OF ISOSTATICALLY-BALANCED CORTICAL MODELS USING MODERN GLOBAL GEOPOTENTIAL MODELS [PDF]

Boletim de Ciências Geodésicas, 2017
Abstract: The knowledge of the Earth's gravity field and its temporal variations is the main goal of the dedicated gravity field missions CHAMP, GRACE and GOCE. Since then, several global geopotential models (GGMs) have been released. This paper uses geoid heights derived from global geopotential models to analyze the cortical features of the Tandilia ...
Claudia Infante, Cláudia Tocho, D. Del Cogliano   +2 more
core   +8 more sources

A novel approach for optimizing regional geoid modeling over rugged terrains based on global geopotential models and artificial intelligence algorithms [PDF]

Egyptian Journal of Remote Sensing and Space Sciences
Accurate geoid modeling is significant in geodetic, geological, and environmental sciences. Owing to challenges in establishing reference stations, particularly in rugged terrains, such as in Northern Vietnam, leveraging global geopotential models (GGMs)
Mohamed A. Elshewy, Phung Trung Thanh, Amr M. Elsheshtawy, Mervat Refaat, Mohamed Freeshah   +4 more
doaj   +4 more sources

Assessment of Global Geopotential Models for Modelling Malaysia Marine Geoid [PDF]

International Journal of Integrated Engineering, 2022
The evaluation towards global geopotential models represents a significant part in modelling the localised Marine Geoid. The marine geoid provides the vertical reference information in Marine Spatial Data Infrastructures (MSDI) development response to United Nations Sustainable Development Goals 14 for the ...
Yahaya, Noor Anim Zanariah, Md. Din, Ami Hassan, Omar, Abdullah Hisam, Mohamad Abdullah, Nazirah, Mohammad Yazid, Nornajihah, Pasuya, Muhammad Faiz, Abdul Wahab, Mohamad Ikbar   +6 more
openaire   +4 more sources

The Accuracy Verification of Recent Global Geopotential Model based on GNSS/Levelling Data on Ground Control Points in Johor [PDF]

E3S Web of Conferences
The external gravitational field of the Earth is mathematically represented using spherical harmonic (SH) coefficients in the global geopotential model. Hence, the appropriate global geopotential model for a region needs to determine a reference surface ...
Qi Lee Z., Yazid Nornajihah Mohammad, Sebastian Joshua Mickail Anak, Zaki Ahmad Hakimi Mohd, Din Ami Hassan Md, Pa’suya Muhammad Faiz   +5 more
doaj   +3 more sources

An Assessment of the GOCE High-Level Processing Facility (HPF) Released Global Geopotential Models with Regional Test Results in Turkey [PDF]

Remote Sensing, 2020
The launch of dedicated satellite missions at the beginning of the 2000s led to significant improvement in the determination of Earth gravity field models.
Bihter Erol, Mustafa Serkan Işık, Serdar Erol   +2 more
doaj   +2 more sources

Evaluation of the geopotential value W0LVD of China [PDF]

Geodesy and Geodynamics, 2017
Estimation of the zero-height geopotential value W0LVD for the CVD (China Vertical Datum) plays a fundamental role in the connection of traditional height reference systems into a global height system.
Lin He, Yonghai Chu, Nan Yu
doaj   +2 more sources

MARINE GEOID UNDULATION ASSESSMENT OVER SOUTH CHINA SEA USING GLOBAL GEOPOTENTIAL MODELS AND AIRBORNE GRAVITY DATA [PDF]

The International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences, 2016
Global geopotential models (GGMs) are vital in computing global geoid undulations heights. Based on the ellipsoidal height by Global Navigation Satellite System (GNSS) observations, the accurate orthometric height can be calculated by adding precise and ...
N. M. Yazid, A. H. M. Din, K. M. Omar, Z. A. M. Som, A. H. Omar, N. A. Z. Yahaya, A. Tugi   +6 more
doaj   +3 more sources

Global geopotential models from Satellite Laser Ranging data with geophysical applications: A review [PDF]

South African Journal of Science, 2012
The launch of artificial satellites (as early as in 1957), specifically the launch of the first laser tracked satellite, Beacon-B, in 1964, has provided data sets which have allowed researchers to probe the long to medium components of the gravitational ...
Christina Botai, Ludwig Combrinck
doaj   +8 more sources

Analysis of a Relative Offset between the North American and the Global Vertical Datum in Gravity Potential Space

Remote Sensing, 2023
The accurate estimation of the zero-height geopotential level in a local vertical datum (LVD) is critical for linking traditional height reference systems to a global height system.
Dongmei Guo, Zhixin Xue
doaj   +1 more source