Communications: directive radio wave systems and devices (e.g. – Directive – Including a satellite
Reexamination Certificate
2007-05-22
2007-05-22
Tarcza, Thomas H. (Department: 3662)
Communications: directive radio wave systems and devices (e.g.,
Directive
Including a satellite
C342S354000, C342S357490
Reexamination Certificate
active
11247641
ABSTRACT:
A method and apparatus for estimating a lever arm correction between the wide beam antenna and the spot beam antenna in a navigational satellite system is disclosed. A prescribed satellite maneuver is used to increase the accuracy of the predicted satellite attitude in determining the lever arm, and lever arm corrections are provided to navigation receivers using curve fit coefficients to permit long range estimates and to minimize data transmission requirements.
REFERENCES:
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B.C. Barker et al., Overview of the GPS M Code Signal, Proceedings of the Institute of Navigation, Jan. 2000.
Defense Science Board Task Force on The Future of the Global Positioning System, http://www.acq.osd.mil/dsb/reports/2005-10-GPS—Report—Final.pdf, Oct. 2005.
K. Kovach, New User Equivalent Range Error (UERE) Budget for the Modernized Navstar Global Positioning System (GPS), Proceedings of The Institute of Navigation National Technical Meeting, Jan. 2000.
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O'Brien Kevin M.
Tekawy Jonathan A.
Gates & Cooper LLP
Mull Fred H
Tarcza Thomas H.
The Boeing Company
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