Results 141 to 150 of about 285 (165)

Orthometric Heights Without Leveling

Journal of Surveying Engineering, 1987
Orthometric heights can be obtained without leveling by combining gravimetrically determined geoidal heights and ellipsoidal heights derived from Global Positioning System (GPS) interferometry. The accuracy of the orthometric heights is dependent on the accuracy of each of the two components.
K. P. Schwarz, M. G. Sideris, R. Forsberg   +2 more
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The orthometric height and the holonomity problem

Journal of Geodesy, 2006
When height networks are being adjusted, many geodesists advocate the approach where the adjustment should be done by using geopotential numbers rather than the orthometric or normal heights used in practice. This is based on a conviction that neither orthometric nor normal heights can be used for the adjustment because these height systems are not ...
SANSO', FERNANDO, P. Vanicek
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Measuring Land Subsidence Using GPS: Ellipsoid Height versus Orthometric Height

Journal of Surveying Engineering, 2015
AbstractGlobal positioning system (GPS) technology has been frequently used to monitor geological hazards associated with ground deformations, such as long-term landslides and subsidence. When GPS data are processed, they yield ellipsoid heights, which are the distances above a smooth ellipsoid surface.
Guoquan Wang, Tomás Soler
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GPS – A TOOL FOR ORTHOMETRIC HEIGHT DETERMINATIONS

Survey Review, 1994
AbstractOrthometric height differences derived from spirit levelling and relative GPS measurements are compared. Combined geoid solutions using the OSU89B geopotential model with terrestrial gravimetry are used to transform the ellipsoidal height differences from GPS to the orthometric height differences. An agreement of better than 2 parts per million
J. R. Gilliland, D. S. Jaksa
openaire   +1 more source

Deriving orthometric height using global geopotential models (GGMs)

2016 7th IEEE Control and System Graduate Research Colloquium (ICSGRC), 2016
The purpose of this paper is to evaluate the orthometric height derived by combination of Global Navigation Satellite System (GNSS) data and global geoid height information over Peninsular Malaysia. The global geoid height information is derived from recent Global Geopotential Models (GGMs); combined and satellite-only solution.
Saiful Aman Hj Sulaiman, Nursyahirah Naim, Kamaluddin Hj Talib, Mat Akhir Md Wazir, Othman Mohd Yusof   +4 more
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Orthometric Heights Using GPS in Canada

1991
The completion of the full constellation of GPS/NAVSTAR satellites in the near future will result in survey projects being completed more efficiently. Currently, the number of users of this relatively new positioning technique is increasing. GPS is being applied in engineering projects requiring heights.
A. Mainville, M. Véronneau
openaire   +1 more source

Adjustment of Collocated GPS, Geoid and Orthometric Height Observations in Greece. Geoid or Orthometric Height Improvement?

2011
The combined adjustment of GPS/Levelling observations on benchmarks with gravimetric geoid heights has been the focus of extensive research both from the theoretical and practical point of view. Up until today, with few exceptions, the main blame for the inconsistencies/disagreement between these three types of heights has been put to the geoid heights
I. N. Tziavos, G. S. Vergos, V. N. Grigoriadis, V. D. Andritsanos   +3 more
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Determination of Orthometric Height of NJI2 CORS Station

Journal of Surveying Engineering, 2003
Many surveyors use the network of global positioning system (GPS) Continuously Operating Reference Stations (CORS) as accurate “free” control monuments in their projects. The National Geodetic Survey (NGS) publishes and maintains coordinates for these stations in terms of X, Y, Z, and latitude, longitude, and ellipsoidal heights.
Joshua Greenfeld, James D. Sens
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Orthometric Heights from Global Positioning System

Journal of Surveying Engineering, 1992
It is generally accepted that observations from both Global Positioning System (GPS) surveys and geodetic leveling are capable of producing high-precision results in terms of ellipsoidal and orthometric height differences, respectively. It follows that a knowledge of the geoidal model to the specified degree of accuracy is the essential element in ...
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A refined conversion from normal height to orthometric height

Studia Geophysica et Geodaetica, 2006
The difference between orthometric and normal heights (or the height anomaly and the geoid height) is usually approximated by a term consisting of the Bouguer anomaly times elevation divided by normal gravity. We derive an improved formula, which includes a topographic roughness term (terrain correction) and a term due to the lateral variation of ...
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