Physics
Scientific paper
Dec 2004
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004agufm.g51b0084k&link_type=abstract
American Geophysical Union, Fall Meeting 2004, abstract #G51B-0084
Physics
1241 Satellite Orbits, 1294 Instruments And Techniques
Scientific paper
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.
Kawaguchi Noriyuki
Kono Yoshio
Murata Yoshitaka
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