Publication Date:
2011-05-24
Description:
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 resembles the ideas behind the GGOS initiative. The objective of the GGOS-D project was the investigation of the methodological and information-technological realization of a global geodetic-geophysical observing system and especially the integration and combination of the space geodetic observations. In the course of this project, highly consistent time series of GPS, VLBI, and SLR results were generated based on common state-of-the-art standards for modeling and parameterization. These series were then combined to consistently and accurately compute a Terrestrial Reference Frame (TRF). This TRF was subsequently used as the basis to produce time series of station coordinates, Earth orientation, and troposphere parameters. In this publication, we present results of processing algorithms and strategies for the integration of the space-geodetic observations which had been developed in the project GGOS-D serving as a prototype or a small and limited version of the data handling and processing part of a global geodetic observing system. From a comparison of the GGOS-D terrestrial reference frame results and the ITRF2005, the accuracy of the datum parameters is about 5–7 mm for the positions and 1.0–1.5 mm/year for the rates. The residuals of the station positions are about 3 mm and between 0.5 and 1.0 mm/year for the station velocities. Applying the GGOS-D TRF, the offset of the polar motion time series from GPS and VLBI is reduced to 50 μ as (equivalent to 1.5 mm at the Earth’s surface). With respect to troposphere parameter time series, the offset of the estimates of total zenith delays from co-located VLBI and GPS observations for most stations in this study is smaller than 1.5 mm. The combined polar motion components show a significantly better WRMS agreement with the IERS 05C04 series (96.0/96.0 μ as) than VLBI (109.0/100.7 μ as) or GPS (98.0/99.5 μ as) alone. The time series of the estimated parameters have not yet been combined and exploited to the extent that would be possible. However, the results presented here demonstrate that the experiences made by the GGOS-D project are very valuable for similar developments on an international level as part of the GGOS development. Content Type Journal Article Pages 1-27 DOI 10.1007/s00190-011-0475-x Authors M. Rothacher, Helmholtz-Zentrum Potsdam, Deutsches GeoForschungsZentrum, Telegrafenberg A17, 14473 Potsdam, Germany D. Angermann, Deutsches Geodätisches Forschungsinstitut, Alfons-Goppel-Straße 11, 80539 Munich, Germany T. Artz, Institute of Geodesy and Geoinformation, University of Bonn, Nussallee 17, 53115 Bonn, Germany W. Bosch, Deutsches Geodätisches Forschungsinstitut, Alfons-Goppel-Straße 11, 80539 Munich, Germany H. Drewes, Deutsches Geodätisches Forschungsinstitut, Alfons-Goppel-Straße 11, 80539 Munich, Germany M. Gerstl, Deutsches Geodätisches Forschungsinstitut, Alfons-Goppel-Straße 11, 80539 Munich, Germany R. Kelm, Deutsches Geodätisches Forschungsinstitut, Alfons-Goppel-Straße 11, 80539 Munich, Germany D. König, Helmholtz-Zentrum Potsdam, Deutsches GeoForschungsZentrum, Telegrafenberg A17, 14473 Potsdam, Germany R. König, Helmholtz-Zentrum Potsdam, Deutsches GeoForschungsZentrum, Telegrafenberg A17, 14473 Potsdam, Germany B. Meisel, Deutsches Geodätisches Forschungsinstitut, Alfons-Goppel-Straße 11, 80539 Munich, Germany H. Müller, Deutsches Geodätisches Forschungsinstitut, Alfons-Goppel-Straße 11, 80539 Munich, Germany A. Nothnagel, Institute of Geodesy and Geoinformation, University of Bonn, Nussallee 17, 53115 Bonn, Germany N. Panafidina, Helmholtz-Zentrum Potsdam, Deutsches GeoForschungsZentrum, Telegrafenberg A17, 14473 Potsdam, Germany B. Richter, Bundesamt für Kartographie und Geodäsie, Richard-Strauss-Allee 11, 60598 Frankfurt am Main, Germany S. Rudenko, Helmholtz-Zentrum Potsdam, Deutsches GeoForschungsZentrum, Telegrafenberg A17, 14473 Potsdam, Germany W. Schwegmann, Bundesamt für Kartographie und Geodäsie, Richard-Strauss-Allee 11, 60598 Frankfurt am Main, Germany M. Seitz, Deutsches Geodätisches Forschungsinstitut, Alfons-Goppel-Straße 11, 80539 Munich, Germany P. Steigenberger, Helmholtz-Zentrum Potsdam, Deutsches GeoForschungsZentrum, Telegrafenberg A17, 14473 Potsdam, Germany S. Tesmer, Institute of Geodesy and Geoinformation, University of Bonn, Nussallee 17, 53115 Bonn, Germany V. Tesmer, Deutsches Geodätisches Forschungsinstitut, Alfons-Goppel-Straße 11, 80539 Munich, Germany D. Thaller, Helmholtz-Zentrum Potsdam, Deutsches GeoForschungsZentrum, Telegrafenberg A17, 14473 Potsdam, Germany Journal Journal of Geodesy Online ISSN 1432-1394 Print ISSN 0949-7714
Print ISSN:
0949-7714
Electronic ISSN:
1432-1394
Topics:
Architecture, Civil Engineering, Surveying
,
Geosciences
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