Observation level combination of SLR and VLBI with c5++: A case study for TIGO |
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| Authors: | Thomas Hobiger Toshimichi Otsubo Mamoru Sekido |
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| Institution: | 1. Space-Time Standards Laboratory, Applied Electromagnetic Research Institute, National Institute of Information and Communications Technology (NICT), 4-2-1 Nukui-Kitamachi, Koganei, 184-8795 Tokyo, Japan;2. Geoscience Laboratory, Hitotsubashi University, East Bldg, 2-1 Naka, Kunitachi 186-8601, Japan;3. Space-Time Standards Laboratory, Kashima Space Technology Center, Applied Electromagnetic Research Institute, National Institute of Information and Communications Technology (NICT), 893-1 Hirai, Kashima, Ibaraki 314-0012, Japan |
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| Abstract: | A multi-technique space geodetic analysis software named c5++ has been developed and allows one to combine data on the observation level. With SLR and VLBI modules being ready and tested, this software has been used to compute coordinate time series of the geodetic fundamental station TIGO, located near Concepción, Chile. It can be shown that the combination of space geodetic data on the observation level leads to a significant improvement of station position repeatability, which is an important measure for the stability of a station in the terrestrial reference frame. Moreover, it could be demonstrated that the geophysical signal of the post-seismic tectonic plate movement is usually more complete than detected by any of the two single-technique solutions. In addition, it has been confirmed that so-called nuisance parameters, which are relying on data from a single technique, are not biased when combing observations from different space geodetic techniques. |
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| Keywords: | SLR VLBI GGOS Combination Earthquake |
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