An Evaluation of VLBI Observations for the Deep Space Tracking of the Interplanetary Spacecrafts

1) Kashima Space Research Center, Communications Research Laboratory 2) Space Solutions Department, Advanced Science Solutions Group, Fujitsu Limited 3) Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency 4) Space Geodynamics Laboratory/York University 5) Space Geodynamics Laboratory 6) Natural Resources Canada 7) JAXA, GSI, NAO, Hokkaido Uni., Gifu Univ., Yamaguchi Univ. Contact author: Ryuichi Ichikawa, e-mail: richi@crl.go.jp