The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 05, 2002
Filed:
May. 20, 1998
Toshihide Maeda, Sagamihara, JP;
Nobuo Hamano, Tokyo, JP;
Shigeki Nakamura, Tokyo, JP;
Tomiharu Yoshida, Hitachinaka, JP;
Masataka Owada, Hitachi, JP;
Masahiko Ikeda, Hitachi, JP;
Takashi Yabutani, Hitachinaka, JP;
Masahiro Ito, Shimizu, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
In order to establish the communication lines among the movable bodies and/or fixed stations and to configure communication system with a small number of satellites, present method has the steps of determining six orbit-related parameters by using a input conditions including a geographical condition of the service area, a desired service time and the tolerance of an ascending vertical angle within which the satellite can be viewed from the service area, and establishing the satellite communication with one or more satellites, an individual satellite being arranged on the orbits selected and combined among plural elliptical orbits corresponding to the determined six orbit-related parameters on which the satellites stay for a sufficiently long time that they may come successfully into sight in the zenith direction.