Results 1 to 10 of about 2,567 (220)

Geopotential Model of Earth - Approximation of Earth Shape, Geopotential Model Testing Methods [PDF]

open access: yesCommunications, 2001
Stokes' geodynamic parameters in the expansion of the gravity potential of the Earth serve for a mathematical and physical description of an outer gravity field of the Earth, the shape and the size of the Earth.
Robert Tenzer
doaj   +2 more sources

Global Geopotential Models assessment in Ecuador based on geoid heights and geopotential values

open access: yesJournal of Geodetic Science, 2023
Since the 1960s, the analysis of disturbed satellite orbits to infer Earth’s gravity field functionals has been an important element in determining the Earth’s gravitational field. The long wavelengths of the gravitational field are recovered through the
Carrión José   +3 more
doaj   +2 more sources

Is the geopotential directly measurable [PDF]

open access: yesGeodetski Glasnik, 2016
It has been pointed out by the great Swedish geodesist Arne Bjerhammar and others around1985 that it is possible to replace the classical method of spirit leveling for determining differences of the geopotential by a much more direct and elegant method ...
Helmut Moritz
doaj   +2 more sources

Estimation of vertical datum offset for the South African vertical datum, in relation to the international height reference system [PDF]

open access: yesGeodetski Vestnik, 2021
The vertical offset and the geopotential value over South Africa is estimated on the four fundamental benchmarks in relation to the international height reference system (IHRS).
Matthews Siphiwe Mphuthi   +1 more
doaj   +1 more source

Test of Determining Geopotential Difference between Two Sites at Wuhan Based on Optical Clocks’ Frequency Comparisons

open access: yesRemote Sensing, 2022
Applications of optical clocks in physical geodesy for determining geopotential are of increasing interest to scientists as the accuracy of optical clocks improves and the clock size becomes more and more compact.
Anh The Hoang   +4 more
doaj   +1 more source

Measuring Height Difference Using Two-Way Satellite Time and Frequency Transfer

open access: yesRemote Sensing, 2022
According to general relativity theory (GRT), the clock at a position with lower geopotential ticks slower than an identical one at a position with higher geopotential.
Peng Cheng   +5 more
doaj   +1 more source

Unifying the Regional Height System Using Optic-Fiber Clock Network: A Simulation Test for Southeast Asia

open access: yesIEEE Access, 2023
Orthometric height datum systems are critical in the geodetic community. Nonetheless, individual nations or local regions maintain their distinct height systems.
Anh The Hoang, Ziyu Shen, Wen-Bin Shen
doaj   +1 more source

WINTER EXTREME EVENTS – ROMANIAN CARPATHIAN AVALANCHES [PDF]

open access: yesAerul şi Apa: Componente ale Mediului, 2017
The study presents a statistics of avalanche cases recorded in Romanian Carpathians over the years, most of them since February 2004, when the National Meteorological Administration program for snow and avalanches started, but also from Mountain Rescue ...
A. PAŞOL, C. GRECU, U. RECKERTH
doaj   +1 more source

Identification Humidity Resources and Course of Super Heavy Precipitation In Bushehr Province [PDF]

open access: yesجغرافیا و توسعه, 2009
In this paper, humidity advection maps of sea level and 850 hpa and geopotential height of sea level pressure and 500 hpa level were drawn and studied for 5 types of above 100 mm precipitation in the Bushehr province.
gavad khoshal   +2 more
doaj   +1 more source

Euroregions in the Podrinje region [PDF]

open access: yesGlasnik Srpskog Geografskog Društva, 2008
Regionalization is a contemporary conception of a development within a society. We are interested in cooperation at regions whose area is intersected by the national border. One of those borders is the Drina River that in different periods had changeable
Tošić Branka, Todorović Marina
doaj   +1 more source

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