Control segment-based lever-arm correction via curve fitting...

Details Control segment-based lever-arm correction via curve fitting... Control segment-based lever-arm correction via curve fitting...

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

11247640

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 from a ground segment to navigation receivers using curve fit coefficients to permit long range estimates and to minimize data transmission requirements.

REFERENCES:
patent: 5928309 (1999-07-01), Korver et al.
P.W. Ward et al., Satellite Signal Acquisition, Tracking, and Data Demodulation, Chapter 5 in Understanding GPS: Principles and Applications, Second Edition, ed. E. Kaplan et al., Artech House, p. 153, 164, 2005.
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.
K.D. McDonald, The Modernization of GPS: Plans, New Capabilities and the Future Relationship to Galileo, Journal of Global Positioning Systems, vol. 1(1), p. 1-17, 2002.

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