Results 161 to 170 of about 1,336 (202)
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ITRF to GDA94 coordinate transformations
Journal of Applied Geodesy, 2010The Geocentric Datum of Australia 1994 (GDA94) is a static coordinate datum realised with respect to the International Terrestrial Reference Frame (ITRF) at the reference epoch of 1 January 1994. At this time GDA94 and ITRF were coinci- dent, however, as a consequence of the tectonic mo- tion of the Australian Plate, ongoing refinement of the ITRF and ...
John Dawson
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Strengthes and Limitations of the ITRF: ITRF2005 and Beyond
International Association of Geodesy Symposia, 2009As the International Terrestrial Reference Frame (ITRF) is constructed by combination of space geodesy technique solutions together with terrestrial local ties in co-location sites, it then inherits strengths and weaknesses of the combined data. This paper uses the ITRF2005 results in order to illustrate the critical aspects of the combination that ...
X Collilieux, C Boucher
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IGS Reference Frames and Their Relationship to the ITRF
Encyclopedia of Earth Sciences Series, 2023exaly +2 more sources
ITRF Combination — Status and Recommendations for the Future
2005In its function as ITRS Combination Center and IERS Combination Research Center, DGFI is involved in the combination of space geodetic observations. Based on the latest space geodetic solutions provided by individual analysis centers and/or technique centers, DGFI has computed a combined solution for station positions and velocities.
D Angermann, H Drewes, M Gerstl
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The GPS Toolbox ITRF Transformations
GPS Solutions, 2002The GPS Toolbox is dedicated to highlighting algorithms and source code utilized by GPS engineers and scientists. If you have an interesting subroutine or program you would like to share with our readers, please pass it along so that we might continue to bring you this column; e-mail it to us at gps-toolbox@ngs.noaa.gov. To comment on any of the source
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Accuracy Assessment of the ITRF Datum Definition
2008One of the main objectives of the International Terrestrial Reference Frame (ITRF) is to provide a standard global reference frame having the most attainable accuracy of its datum definition in terms of its origin, scale and the time evolution of its orientation. This latter should satisfy, by convention, the no net rotation condition.
Z. Altamimi, X. Collilieux, C. Boucher
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SLR Requirements for the Development of the ITRF
2017ILRS Technical Workshop 2017; Riga, Latvia; October 2-5 ...
Pavlis, Erricos C. +1 more
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Are there detectable common aperiodic displacements at ITRF co-location sites?
Journal of Geodesy, 2021Nowadays, the time evolution of ITRF station positions is described by piece-wise linear models extended with exponential and logarithmic functions to account for post-seismic displacements. The ITRF2020 will also account for seasonal deformation by means of annual and semi-annual sine waves.
de la Serve, Maylis +4 more
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The Choice of Reference System in ITRF Formulation
2011The problem of choosing an optimal reference system for the International Terrestrial Reference Frame (ITRF) is studied for both the rigorous solution which is a simultaneous stacking (removal of the reference system at each data epoch and implementation of a linear in time coordinate model) for all techniques, as well as for the usual numerically ...
Zuheir Altamimi, Athanasios Dermanis
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DORIS Assessment of the 2020 ITRF Realizations
2022<p>In the context of the 2020 realization of the International Terrestrial Reference Frame, the three IERS Production Centers (DGFI, IGN and JPL) delivered three independent solutions from the contributions of the four space geodetic techniques (DORIS, GNSS, SLR and VLBI).
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