Differential ground station repeater
AssigneeHoneywell Inc.
InventorRodney L. Stangeland
Life of this patent
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Abstract
A differential global position system wherein a DGPS ground station encodes signals from a plurality of satellites and transmits the encoded signal with satellite-specific pseudo range error signals and a ground station repeaters located remote from the DGPS ground station to receive the encoded signal and retransmit it to an airborne object.
Claims15
A differential global position system for use in determining one or more parameters of an object with respect to earth by use of information transmitted to the object from a plurality of satellites which information may contain errors due to path distortions, comprising:
- a ground receiving station at a first known location and including a receiver to receive the information from the satellites and to produce an output signal indicative of the errors;
- means located proximate the ground receiving station for encoding the output signal in accordance with requirements for data transmission between the ground receiving station and the object;
- a first transmitter located proximate the ground receiving station for broadcasting the encoded output signal to the object;
- and
- a second transmitter located at a second position remote from the receiving station to receive the broadcast encoded output signal from the first transmitter and to retransmit it to the object.
A process for use with a differential global position system in which information from a plurality of satellites is received at a ground station and processed to determine any errors therein and the processed information is encoded for transmission to aircraft within transmission range of the ground station, an improvement permitting a single encoding of the processed information comprising the steps of:
- A. connecting the ground station to a first transmitter located proximate the ground station to receive the processed and encoded information and transmit it to the aircraft in a first time slot at a frequency;and
- B. transmitting the processed and encoded information from the first transmitter to a second transmitter located remote from the grounds station for transmission to the aircraft in a second time slot a the same frequency.
A multiple access transmission system for use in communicating common information to an object from multiple transmitters broadcasting in different time slots, comprising:
- a ground receiving station at a first known location operable to produce an encoded output signal in accordance with requirements for data transmission between the ground receiving station and the object;
- a first transmitter located proximate the ground receiving station for broadcasting the encoded output signal to the object;
- and
- a second transmitter located at a second position remote from the receiving station to receive the broadcast encoded output signal from the first transmitter, to delay it into a proper time slot and to retransmit it to the object wherein the first transmitter transmits the encoded output signal in a first time slot at a frequency and the second transmitter transmits the encoded output signal in the proper time slot at the same frequency. pg,11
Dependencies are inferred from the claim text.