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Expanded SLR Target Constellation for Improved Future ITRFs
2020The GGOS-imposed requirements to be met by all geodetic techniques per decade are very stringent: 1 mm position and 0.1 mm/y temporal stability. We are an order of magnitude worse today due to a poor ground segment and limitations in the space segment.
Pavlis, E. C. +2 more
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Improvement of the transformation between ITRF and Doppler-Realized WGS84
Journal of Geodesy, 1996The WGS84 (World Geodetic System 1984) reference system is, originally, mathematically defined from the NSWC-9Z2 (Naval Surface Weapons Center — 9Z2) reference system. The WGS84 associated realization, called in this paper WGS84-D, is a 1 meter consistency NNSS (US Navy Navigation Satellite System) Doppler realized reference frame.
Patrick Sillard, Claude Boucher
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Recent Contribution to the ITRF and its Realization in Canada
2000Natural Resources Canada (NRCan) is processing data daily from a subset of at least eight Canadian automated GPS tracking stations, the Active Control Points (ACP), and from at least twenty five of the International GPS Service (IGS) stations using a modified version of JPL GIPSY-OASIS II software. NRCan contributes to IGS solutions for satellite orbit,
R. Ferland +4 more
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A Study on the Transfer of the ITRF Datum to a GPS Network in Antarctica
2001The Reference Network Antarctica represents a highly precise densification of the International Terrestrial Reference Frame (ITRF) in the Antarctic region. It was established within two bundle projects sponsored by the Ministery of Science and Research of Germany (BMBF) under the auspices of the Scientific Committee on Antarctic Research (SCAR ...
S. Schön +3 more
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The contribution of LARES in future ITRF developments
20122nd International LARES Science Workshop; Roma, Italy, 17-19 September ...
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The ITRF Beyond the “Linear” Model. Choices and Challenges
2008The current solution to the choice of a reference system for the coordinates of a global geodetic network is based on a linear model for the time evolution of station coordinates. The advantages and disadvantages between a mathematical approach and a physical approach to the optimal definition of a reference system for the International Terrestrial ...
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ITRF Combination: Theoretical and Practical Considerations and Lessons from ITRF2008
2012The current ITRF construction is based on a two-step approach, combining input data provided by space geodesy techniques (VLBI, SLR, GPS, DORIS) in the form of time series of station positions and Earth Orientation Parameters. In the first step, the individual technique time series are rigorously stacked (accumulated) yielding long-term secular ...
Z. Altamimi, X. Collilieux, L. Métivier
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Positionning the terrestrial ephemeris origin in the ITRF
2002International ...
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