@inproceedings{oai:jaxa.repo.nii.ac.jp:00020395, author = {菊池, 冬彦 and 劉, 慶会 and 花田, 英夫 and 河野, 宣之 and 松本, 晃治 and 岩田, 隆浩 and 浅利, 一善 and 石原, 吉明 and 鶴田, 誠逸 and Kikuchi, Fuyuhiko and Liu, Qinghui and Hanada, Hideo and Kawano, Nobuyuki and Matsumoto, Koji and Iwata, Takahiro and Goossens, Sander and Asari, Kazuyoshi and Ishihara, Yoshiaki and Tsuruta, Seiitsu}, book = {Proceedings of the ISAS lunar and planetary symposium}, month = {}, note = {The 41st ISAS Lunar and Planetary Symposium (August 6-8, 2008. Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency (JAXA)), Same beam VLBI (very long baseline interferometry) observations of the two sub-satellites of SELENE (KAGUYA) are demonstrated for purpose of the precise gravimetry of the Moon. The same beam VLBI contributes a great deal to cancel out the tropospheric and ionospheric delays and to determine the absolute value of the cycle ambiguity by using the multi frequency VLBI method. As a result, the differential phase delay of the X-band signal is estimated within an error of below one pico-second. This accuracy is more than one order of magnitude better than former VLBI results, revealing the possibility of precise gravimetry., Physical characteristics: Original contains color illustrations, Number of authors: 17, 資料番号: AA0064291016}, pages = {67--68}, publisher = {宇宙航空研究開発機構宇宙科学研究本部, Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency (JAXA)}, title = {Precise orbit determination of sub-satellites of SELENE (Kaguya): Differential VLBI observations by same beam and multi frequency VLBI methods}, volume = {41}, year = {2009} }