Movements of VLBI Stations and the Effects of Ionospheric Delay Corrections on the Positions of the Domestic VLBI Experiments in Japan.

概要

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The Geographical Survey Institute (GSI) and the Communications Research Labora tory (CRL) have conducted many domestic VLBI experiments since 1934. Here, we un dertake the baseline analyses of 54 domestic VLBI experiments using the same models and parameters. We present the results on the positions of 15 stations These positions make the reference of positions in Japan. The movements of six stations, Tsukuba, Koganei, Kanozan, Titijima, Shintomi, Minami-Daito are also obtained in the international coordinate system ITRF93. The differences between the observed movements and the NUVELI-A plate model are obtained to subtract the movements of each station predicted by the NUVELI-A plate model in the ITRF93 velocity field. These stations are located near plate boundary. The directions of differences agreed with the direction of the neighboring plate motion. Furthermore, the positions are obtained in the analyses with ionospheric delay corrections by S & X dual bands data, and without ionospheric delay corrections. Comparing these results, the effect of ionospheric delay correction on the station positions in the domestic VLBI experiments is investigated.
日本測地学会の論文