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Orbit Determination of the SELENE Satellites Using Multi-Satellite Data Types and Evaluation of SELENE Gravity Field ModelsThe SELENE mission, consisting of three separate satellites that use different terrestrial-based tracking systems, presents a unique opportunity to evaluate the contribution of these tracking systems to orbit determination precision. The tracking data consist of four-way Doppler between the main orbiter and one of the two sub-satellites while the former is over the far side, and of same-beam differential VLBI tracking between the two sub-satellites. Laser altimeter data are also used for orbit determination. The contribution to orbit precision of these different data types is investigated through orbit overlap analysis. It is shown that using four-way and VLBI data improves orbit consistency for all satellites involved by reducing peak values in orbit overlap differences that exist when only standard two-way Doppler and range data are used. Including laser altimeter data improves the orbit precision of the SELENE main satellite further, resulting in very smooth total orbit errors at an average level of 18m. The multi-satellite data have also resulted in improved lunar gravity field models, which are assessed through orbit overlap analysis using Lunar Prospector tracking data. Improvements over a pre-SELENE model are shown to be mostly in the along-track and cross-track directions. Orbit overlap differences are at a level between 13 and 21 m with the SELENE models, depending on whether l-day data overlaps or I-day predictions are used.
Document ID
Document Type
Reprint (Version printed in journal)
Goossens, S.
(National Astronomical Observatory Iwate, Japan)
Matsumoto, K.
(National Astronomical Observatory Iwate, Japan)
Noda, H.
(National Astronomical Observatory Iwate, Japan)
Araki, H.
(National Astronomical Observatory Iwate, Japan)
Rowlands, D. D.
(NASA Goddard Space Flight Center Greenbelt, MD, United States)
Lemoine, F. G.
(NASA Goddard Space Flight Center Greenbelt, MD, United States)
Date Acquired
August 25, 2013
Publication Date
February 8, 2011
Publication Information
Publication: Journal of Geodesy
Volume: 85
Issue: 8
Subject Category
Space Communications, Spacecraft Communications, Command And Tracking
Report/Patent Number
Funding Number(s)
Distribution Limits
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