@article{oai:jaxa.repo.nii.ac.jp:00031199,
 author = {UESUGI, Kuninori},
 journal = {The Institute of Space and Astronautical Science report. S.P. : Proceedings of the Workshop on Space Debris May 11, 1989 at ISAS Conference Hall},
 month = {Mar},
 note = {A chronological review of studies in ISAS concerning collisions in space is presented. It is shown that collision probability in space with artificial orbiting bodies was estimated, and that Space Traffic Control System was proposed, in the study in 1971. Safety design of space station against collision hazards were discussed in 1972. A trajectory optimization technique for low-thrust multiple rendezvous mission in order to sweep space debris around the earth was developed in 1977. In 1984,collision probability was reestimated using space debris data accumlated for more than a decade., 資料番号: SA0033440000},
 pages = {5--20},
 title = {Collisions in Space : A Retrospect of Studies in ISAS},
 volume = {11},
 year = {1990}
}