Global augmentation to global positioning system

Patent 6531981 Issued on March 11, 2003. Estimated Expiration Date:

April 30, 2021. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.

Abstract Claims Description Full Text

Patent References

Satellite radiodetermination
Patent #: 6040798
Issued on: 03/21/2000
Inventor: Kinal, et al.

Receiver with seamless correction capacity
Patent #: 6061632
Issued on: 05/09/2000
Inventor: Dreier

GPS and cellular system interworking Patent #: 6249245
Issued on: 06/19/2001
Inventor: Watters, et al.

Inventors

Assignee

SkyNetix, LLC

Application

No. 845753 filed on 04/30/2001

US Classes:

342/357.03, Using differential correction701/215Having multiple GPS antennas or receivers (e.g., differential GPS)

Examiners

Primary: Issing, Gregory C.

Attorney, Agent or Firm

Townsend and Townsend and Crew LLP

International Class

G01S 005/14

Abstract

A system and method is disclosed for corresponding data associated with primary correction of at least one first measurement of a GPS satellite characteristic to a second measurement of the GPS satellite characteristic taken at a mobile receiver. In a preferred embodiment of the invention, a first processor is coupled to at least one wide-area GPS corrections receiver and at least one local-area GPS corrections receiver. The wide-area and local-area receivers operate to determine the first measurement and secondary data associated with correction of the determined first measurement. In operation, an estimate of the location of the mobile receiver is determined by the first processor. The availability to the mobile receiver of the secondary correction data from the wide-area and local-area GPS corrections receivers is determined, preferably based on the location estimate. From the secondary correction data, primary data representing the primary correction is determined by the first processor. The primary data and the second measurement data are preferably colocated by causing the first processor to transmit the primary correction data to the mobile receiver.