Satellite navigational system and method
First Claim
1. A method for navigating using satellites for transmitting coded time signals as well as additional data which comprises the steps of:
- transmitting only a time signal comprising an identification code from a plurality of orbiting navigational satellites to an intended user;
transmitting navigational data together with a time signal from a plurality of synchronous satellites positioned in geosynchronous orbit, to said user and using additional ground transponder stations for retransmitting the signals of synchronous satellites.
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Accused Products
Abstract
A system and method for nagivating using satellites for transmitting codedime signals as well as additional data for the purpose of determining position, locating operations, navigation, etc., which includes, transmitting only a time signal consisting of an identification code from a plurality of orbiting navigational satellites directly to users, and distributing any data required for determining position, locating operations and navigation as well as any data on orbiting satellites and ground stations by transmission from a small number of synchronous satellites positioned in geosynchronous orbit, to users. Data from the synchronous satellites may be transmitted to users, together with a time signal, at precisely the same frequency at which the navigational satellites emit their time signals.
122 Citations
18 Claims
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1. A method for navigating using satellites for transmitting coded time signals as well as additional data which comprises the steps of:
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transmitting only a time signal comprising an identification code from a plurality of orbiting navigational satellites to an intended user; transmitting navigational data together with a time signal from a plurality of synchronous satellites positioned in geosynchronous orbit, to said user and using additional ground transponder stations for retransmitting the signals of synchronous satellites. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. A system for navigation which comprises:
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a plurality of synchronous navigational satellites having means for transmitting a time signal comprising an identification code and navigation data to an intended user and to a plurality of ground transponder stations; and a plurality of ground transponder stations having means for retransmitting the regenerated time signal and navigational data to said user. - View Dependent Claims (16)
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17. A method for navigating using satellites for transmitting coded time signals as well as navigational data which comprises the steps of:
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transmitting a time signal and navigational data from a synchronous satellite positioned in geosynchronous orbit to an intended user and to a plurality of ground transponder stations; and retransmitting a time signal consisting of an identification code with said navigational data from said plurality of ground transponder stations directly to said users.
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18. A system for navigation which comprises:
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a plurality of orbiting navigational satellites having means for transmitting a time signal comprising an identification code to an intended user; and a plurality of synchronous satellites having means for transmitting navigational data to said user and means for transmitting time signals on two different frequencies, for use in establishing a reference in time between the navigational satellite time signals and the synchronous satellite time signals.
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Specification