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Non-linear station motions in epoch and multi-year reference frames
In the conventions of the International Earth Rotation and Reference Systems Service (e.g. IERS Conventions 2010), it is recommended that the instantaneous station position, which is fixed to the…
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The new DGFI-TUM realization of the ITRS: DTRF2014 (data)
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Combination of GNSS and SLR observations using satellite co-locations
Satellite Laser Ranging (SLR) observations to Global Navigation Satellite System (GNSS) satellites may be used for several purposes. On one hand, the range measurement may be used as an independent…
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GGOS-D: homogeneous reprocessing and rigorous combination of space geodetic observations
In preparation of activities planned for the realization of the Global Geodetic Observing System (GGOS), a group of German scientists has carried out a study under the acronym GGOS-D which closely…
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The ICRF-3: Status, plans, and progress on the next generation International Celestial Reference Frame
TLDR
The goal of this presentation is to report the latest progress in creation of the next generation of VLBI-based International Celestial Reference Frame, ICRF3, and the preparation for comparison with the new generation optical frame GCRF expected by the end of the decade.
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The 2008 DGFI realization of the ITRS: DTRF2008
A new realization of the International Terrestrial System was computed at the ITRS Combination Centre at DGFI as a contribution to ITRF2008. The solution is labelled DTRF2008. In the same way as in…
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Combination of different space-geodetic observations for regional ionosphere modeling
Most of the space-geodetic observation techniques can be used for modeling the distribution of free electrons in the Earth’s ionosphere. By combining different techniques one can take advantage of…
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Consistent realization of Celestial and Terrestrial Reference Frames
TLDR
The results show that the selection of local ties is most critical to the TRF, and the standard deviations of the EOP and the CRF improve by the inter-technique combination which indicates the benefits of a common estimation of all parameters.
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Combination of the Weekly Solutions Delivered by the SIRGAS Processing Centres for the SIRGAS-CON Reference Frame
TLDR
The combination strategy applied by DGFI is described, emphasizing the evaluation of the individual solutions and the quality control of the final weekly combinations and the reliability of the resulting coordinates is estimated by comparing them with those produced by IBGE and the weekly combinations of the IGS global network.
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Comparison of latest ITRS realizations: ITRF2014, DTRF2014 and JTRF2014
TLDR
An overview of the combination strategies of the three ITRS Combination Centres is given and the results of the comparisons which have been performed at DGFI-TUM are summarized.
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