Results 221 to 230 of about 17,261 (248)

Robust estimation of geodetic datum transformation

Journal of Geodesy, 1999
The robust estimation of geodetic datum transformation is discussed. The basic principle of robust estimation is introduced. The error influence functions of the robust estimators, together with those of least-squares estimators, are given. Particular attention is given to the robust initial estimates of the transformation parameters, which should have
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Time Evolution of a World Geodetic Datum

2002
Four fundamental geodetic parameters, namely \(\{ GM,{W_0},\Omega ,{J_2}\} \) , determine a world geodetic datum. With respect to the Somigliana-Pizzetti Level Ellipsoid I International Reference Ellipsoid these fundamental parameters from best estimates at a reference epoch determine its semi-major axis a as well as its semi-minor axis b (or ...
Erik W. Grafarend, Alireza A. Ardalan
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Impact of Satellite Altimetry on Geodetic Datum Definition

The Canadian Surveyor, 1974
Based on results of the geodetic calibration and analysis of Skylab altimeter data, the concept of determination of the geoid in the oceans — the marine geoid — from satellite altimetry has been demonstrated. In principle, the satellite altimetry geoid should combine and improve on all the strong features of the gravimetric, astrogeodetic and ...
D. M. J. Fubara, A. G. Mourad
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The use of space techniques for the connection of geodetic datums

Advances in Space Research, 1986
Abstract Several techniques can provide now for ground stations tridimensional coordinates in global geodetic datum ranging from metre to centimetre. These techniques are basically : VLBI, Laser Ranging to the Moon or artificial satellites such as Lageos or Starlette, range and/or range-rate radio electric tracking of satellites such as Transit ...
Claude Boucher, Zuheir Altamimi
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A MODEL FOR THE ESTABLISHMENT OF AN INTEGRATED REGIONAL GEODETIC DATUM

Survey Review, 1993
Abstract A model for the establishment of an integrated geodetic datum covering a region is treated. The integrated geodetic datum is understood here to comprise the geoid, the reference ellipsoid, and the positional coordinates. A comprehensive unified solution model including the three parameters comprising the datum is considered.
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THE 7-PARAMETER TRANSFORMATION TO A HORIZONTAL GEODETIC DATUM

Survey Review, 1998
Abstract A modified adjustment model is developed for the computation of the 7 parameters of the 3D similarity transformation between geodetic reference frames. The model takes into account the varying quality of the coordinates of the control points.
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The Geodetic Datum in New South Wales

Australian Surveyor, 1984
Abstract In 1969 the National Mapping Council resolved that “all future mapping at all scales” be based on the Australian Map Grid. The AMG is based on the Australian Geodetic Datum 1966, AGD66 which in turn is based on astronomical observations. In consequence of the resolution a massive effort was expended in New South Wales to establish all mapping ...
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Errata/Addendum - Australian Geodetic Datum Technical Manual

Australian Surveyor, 1994
Abstract The Australian Geodetic Datum Technical Manual (Special Publication 10) was produced by the former National Mapping Council of Australia in 1984. Since that time this publication has served as the standard technical reference for the definition of the Australian Geodetic Datum (AGD), the Australian Map Grid (AMG) and the Australian Height ...
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A Quaternion-based Geodetic Datum Transformation Algorithm

Journal of Geodesy, 2006
This paper briefly introduces quaternions to represent rotation parameters and then derives the formulae to compute quaternion, translation and scale parameters in the Bursa–Wolf geodetic datum transformation model from two sets of co-located 3D coordinates.
Yunzhong Shen, Yunzhong Shen, Y. Chen, Y. Chen, D. H. Zheng   +4 more
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DATUM TRANSFORMATION PARAMETERS FOR THE KENYA GEODETIC SYSTEM

Survey Review, 1993
AbstractA summary of the history of geodetic control surveys in Kenya is given and this is related to a geodetic datum. Determination of datum transformation parameters is carried out for the 7-parameter and 3-parameter models using 25 points distributed over the country.
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