Horizontal Movement of Marcus VLBI Station due to the Pacific Plate Motion
by Yasuhiro KOYAMA(1), Kosuke HEKI(1), Michito IMAE(1), Tetsuro KONDO(2),
Hiroshi KUROIWA(3), Yuji SUGIMOTO(4), Fujinobu TAKAHASHI(4),
Taizoh YOSHINO(4), Chihiro MIKI(4), and Jun AMAGAI(5)
Proceedings of the Eighth International Symposium on Recent Crustal
Movements (CRCM'93), published as a special issue of the J. Geodetic Soc. Jpn.,
(1993), pp.117-122
Kashima Space Research Center, Communications Research Laboratory
893-1 Hirai, Kashima, Ibaraki 314 JAPAN
Hiraiso Solar Terrestrial Research Center, Communications Research Laboratory
3601 Isozaki, Naka-Minato, Ibaraki 311-12 JAPAN
Okinawa Radio Wave Observatory, Communications Research Laboratory
829-3 Daigusukubaru, Kuba, Nakagusukuson, Nakagamigun, Okinawa 901-24 JAPAN
Headquaters, Communications Research Laboratory
4-2-1 Nukui-Kitamachi, Koganei, Tokyo 184 JAPAN
Abstract
Current motion of the Minami-Torishima (Marcus) Very Long Baseline
Interferometry (VLBI) station has been measured over the last five
years of Western Pacific VLBI Network (WPVN) experiments. The results
of 16 independent sessions indicated its steady motion of the station
in the horizontal projection plane. The velocity was estimated as
80.5 mm/year toward N67.5W in the IERS Terrestrial Reference Frame
(ITRF92). High reliability and quality of the data obtained from WPVN
experiments was demonstrated by the result that the horizontal movement
of the Marcus station is consistent with a constant velocity linear
motion.