Title:
SATELLITE COMMUNICATION/POSITION MEASUREMENT SYSTEM
Document Type and Number:
Japanese Patent JPH01176966
Kind Code:
A
Abstract:
PURPOSE:To enable communication of high quality and position measurement having no vagueness at any place on the earth by arranging >=1 communication satellite each on a stationary track on the equator and >=1 day-period track slanting to the equator surface. CONSTITUTION:The day period tracks 3 and 4 which slant at, for example, +60 deg. and -60 deg. to the equator surface are set in addition to the stationary track 2 on the equator of the earth 1, and six communication satellites S1-S6, Y1-Y6, and X1-X6 are arranged on those tracks in proper correlation. Then at least three communication satellites can easily be tracked and acquired within a 90 deg. visual field at any high-elevation position on the earth including an equator area and a polar region. Therefore, not only the communication, but also the position measurement are performed without any vagueness. At this time, those three satellites and a ground state are not on the same plane, so there is not any problem of vagueness.
Inventors:
ICHIYOSHI OSAMU
Application Number:
JP33610087A
Publication Date:
July 13, 1989
Filing Date:
December 30, 1987
Export Citation:
Assignee:
NEC CORP
International Classes:
G01S19/00; H04B7/15; (IPC1-7): G01S5/14; H04B7/15
Domestic Patent References:
| JPS62193421A | 1987-08-25 |
Attorney, Agent or Firm:
Hachiman Yoshihiro
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