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The exploration of lunar gravity by VLBI observations of SELENE (Kaguya)


Hanada, H and Iwata, T and Namiki, N and Kawano, N and Sasaki, S and Matsumoto, K and Noda, H and Tsuruta, S and Asari, K and Ishikawa, T and Kikuchi, F and Liu, Q and Gossens, S and Ishihara, Y and Petrova, N and Harada, Y and Shibata, K and Iwadate, K and Kameya, O and Tamura, Y and Hong, X and Ping, J and Aili, Y and Ellingsen, SP and Schluter, W, The exploration of lunar gravity by VLBI observations of SELENE (Kaguya), Transactions of the Japan Society for Aeronautical and Space Sciences, Space Technology Japan, 7, (ists26) pp. Tk_1-Tk_5. ISSN 0549-3811 (2009) [Refereed Article]

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Copyright Statement

Copyright 2009 The Japan Society for Aeronautical and Space Sciences and ISTS

DOI: doi:10.2322/tstj.7.Tk_1


SELENE (Kaguya), which was successfully launched on Sep. 14, 2007, consists of the main orbiter, and two small free-flying sub-satellites, called Rstar (OKINA) and Vstar (OUNA). We use multi-frequency VLBI to measure the angular distance between the two sub-satellite radio sources Okina and Ouna in order to improve the accuracy of the low degree gravitational harmonics and the gravity field near the limb. The observations are made at three frequencies in S-band, (2212, 2218 and 2287 MHz), and one in X-band, (8456MHz) with carrier waves. The Japanese domestic VLBI network, VERA, will conduct VLBI observations for the whole mission period of one year. In addition, we will conduct two periods of international observations, each one month in duration, which will also include the international stations, Shanghai, Urumqi, Hobart, and Wettzell. We have succeeded in making VLBI observations of Okina/Ouna with VERA and the international network, and have also succeeded in correlating of signals from Okina/Ouna. We obtained phase delays with an accuracy of several pico-seconds in S-band.

Item Details

Item Type:Refereed Article
Keywords:SELENE, Kaguya, VLBI, moon, gravity feild
Research Division:Physical Sciences
Research Group:Astronomical sciences
Research Field:Planetary science (excl. solar system and planetary geology)
Objective Division:Expanding Knowledge
Objective Group:Expanding knowledge
Objective Field:Expanding knowledge in the physical sciences
UTAS Author:Ellingsen, SP (Professor Simon Ellingsen)
ID Code:82422
Year Published:2009
Deposited By:Mathematics and Physics
Deposited On:2013-02-01
Last Modified:2013-08-01

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