Communications: directive radio wave systems and devices (e.g. – Directive – Including antenna orientation
Patent
1998-07-01
2000-05-09
Issing, Gregory C.
Communications: directive radio wave systems and devices (e.g.,
Directive
Including antenna orientation
455 121, H04B 7185
Patent
active
060610190
ABSTRACT:
A satellite capturing/tracking apparatus including: an antenna drive unit for driving an antenna in such a manner that said antenna is directed to a direction along which electromagnetic waves are transmitted from either a data relay satellite or a space station in response to a capturing/tracking command; an orbit/position detecting unit for receiving clock signals transmitted from a plurality of GPS satellites to calculate and output the present orbit and position of said apparatus as orbit/position information; a first storage unit for previously storing therein a capturing/tracking sequence program with relative time instants, produced by an azimuth angle and an elevation angle of either said data relay satellite or said space station; a second storage unit for storing therein data used to define a relationship between said azimuth angle, said elevation angle, and the orbit/position of said apparatus with respect to either said data relay satellite or said space station; and a capturing/tracking control unit for producing a capturing/tracking command for capturing/tracking either said data relay satellite or said space station based on said orbit/position information of said orbit/position detecting unit, said capturing/tracking sequence program of said first storage unit, and said relationship data of said second storage unit; whereby, while data is communicated via said data relay satellite between the space station and an earth station, said space station and the data relay satellite are mutually captured/tracked with each other.
REFERENCES:
patent: 5184139 (1993-02-01), Hirako et al.
patent: 5313215 (1994-05-01), Walker
patent: 5583514 (1996-12-01), Fulop
patent: 5678171 (1997-10-01), Toyama et al.
patent: 5880693 (1999-03-01), Drummer
Issing Gregory C.
NEC Corporation
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