Results 181 to 190 of about 2,359 (214)

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
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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
openaire   +1 more source

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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Improving Orthometric Heights Using Precise GPS Measurements

GPS Solutions, 1995
The vertical component obtained from the Global Positioning System (GPS) observations is from the ellipsoid (a mathematical surface), and therefore needs to be converted to the orthometric height, which is from the geoid (represented by the mean sea level).
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Comparison between orthometric, normal and spheroidal orthometric heights over South Africa

Applied Geomatics, 2022
Matthews Siphiwe Mphuthi, Patroba Achola Odera   +1 more
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USING AN OFFICIAL UNDULATION MODEL FOR ORTHOMETRIC HEIGHT ACQUISITION BY GNSS

Survey Review, 2009
Abstract Since the beginning of 2006 the vertical control system in Israel has been ellipsoidal. The Survey of Israel constructs and maintains the ellipsoidal vertical control system based on permanent Global Navigation Satellite System (GNSS) stations.
G. Even-Tzur, G. Steinberg
openaire   +1 more source

An evaluation of orthometric height accuracy using bore hole gravimetry

Bulletin Géodésique, 1982
Errors are introduced in orthometric height computations by the use of standard formulas to estimate mean gravity along the plumb line. Direct measurements of gravity between the Earth’s surface and sea level from bore hole gravimetry were used to determine the magnitude of these errors. For the seven cases studied, errors in orthometric height, due to
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Chronometric measurement of orthometric height differences by means of atomic clocks

Gravitation and Cosmology, 2016
We report on the experimental results of testing a new physical method of determination of the gravitational potential differences and orthometric heights by measuring the relativistic effect of gravitational redshift of frequency by means of atomic clocks. The experiment was performed in the Altai Mountains between two geodetic stations, Shebalino and
S. M. Kopeikin, V. F. Kanushin, A. P. Karpik, A. S. Tolstikov, E. G. Gienko, D. N. Goldobin, N. S. Kosarev, I. G. Ganagina, E. M. Mazurova, A. A. Karaush, E. A. Hanikova   +10 more
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