HR: 0800h
AN: G51B-0084    [Abstracts]
TI: Precise positioning of VSOP2 satellite by delta-VLBI method
AU: * Kono, Y
EM: kono.yusuke@nao.ac.jp
AF: National Astronomical Observatory of Japan, 2-21-1 Osawa, Mitaka, Tokyo, 181-8588, Japan, Mitaka, 181-8588 Japan
AU: Kawaguchi, N
EM: kawagu@hotaka.mtk.nao.ac.jp
AF: National Astronomical Observatory of Japan, 2-21-1 Osawa, Mitaka, Tokyo, 181-8588, Japan, Mitaka, 181-8588 Japan
AU: Murata, Y
EM: murata@vsop.isas.ac.jp
AF: Japan Aerospace Exploration Agency, 3-1-1 Yoshinodai, Sagamihara, Kanagawa 229-8510, JAPAN, Sagamihara, 229-8510 Japan
AB: Following the success of the VLBI Space Observatory Program (VSOP), a next generation space VLBI mission, currently called VSOP2, is being planned. For VSOP-2, higher observing frequencies (8GHz, 22GHz and 43GHz), cooled receivers, increased bandwidths and a larger telescope diameter will result in gains in resolution and sensitivity by factors of 10 over the VSOP mission. The possibility of including a rapid slewing capability for the spacecraft is also being pursued, so that observations using the phase-referencing technique will enable the sensitivity to be improved even further. For phase-referencing observations, orbit accuracy of about 3 cm is required. VSOP2 will have a highly elliptical orbit with apogee altitude of 25000 km. Orbit determination of few-cm accuracy could be achieved by using GPS receivers inside the GPS satellite orbits. Delta-VLBI method could connect position and velocity within the required accuracy over period of time when GPS positioning are unable to provide good solution. Delta-VLBI positioning system and error estimation are shown in this paper.
DE: 1241 Satellite orbits
DE: 1294 Instruments and techniques
SC: Geodesy [G]
MN: 2004 AGU Fall Meeting