Shuichi Matsumoto

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The problem of planning safe kinematic approach trajectories for robotic capture of an uncontrolled rotating satellite is addressed, and two methods of trajectory planning are presented. The first method uses equations of orbital mechanics to plan a passive fly-by approach path for certain conditions of target satellite motion. The second method uses(More)
Travelling Direction Earth Target V-bar Approach R-bar Approach Fly-by Approach Radius Direction Fig. 1 V-bar, R-bar and Fly-by Approach Existing orbital transfer vehicles such as US Space Shuttles, Progress and Japanese H-IIA Transfer Vehicle (HTV) use a straight path approach to the International Space Station (ISS). The straight path approach has many(More)
The capture and recovery of an expensive satellite that has lost its attitude control function can be an important class of future missions for space robots. Moreover, there are tens of thousands of pieces of debris in orbit from previous missions. These orbiting debris such as the uncontrolled pieces of booster stages and obsolete satellites are a serious(More)
Certain types of satellite failures, such as broadcast ephemeris messages that do not correspond to true satellite locations, can be difficult to detect by a Local Area Augmentation System (LAAS) ground facility (LGF) because satellites are observed from reference antennas that are very close together. Although ephemeris failures large enough to threaten(More)
BACKGROUND The incidence of hepatocellular carcinoma (HCC) in Japan has still been increasing. The aim of the present study was to analyze the epidemiological trend of HCC in the western area of Japan, Kyushu. MATERIAL/METHODS A total of 10,010 patients with HCC diagnosed between 1996 and 2008 in the Liver Cancer study group of Kyushu (LCSK), were(More)