Artificial satellite with an orbit having a long staying time in a zenith direction, an orbit control method and a communication system therewith
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United States of America Patent
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-
Dec 11, 2001
Issued Date -
N/A
app pub date -
Sep 29, 2000
filing date -
May 21, 1997
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A communication system, wherein plural elliptical orbits in which an apogee is located on a specified service area are so defined that an individual right ascension of north-bound node may be established with a designated angle. A satellite is made to travel on an individual elliptical orbit and a group of satellites to be arranged on said elliptical orbits are used so that at least one of artificial satellites having a communication system may be always viewable within a pre-defined range of ascending vertical angle in a zenith direction from the service area.
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