Communications: directive radio wave systems and devices (e.g. – Directive – Including a satellite
Reexamination Certificate
2008-05-12
2011-10-11
Issing, Gregory C (Department: 3662)
Communications: directive radio wave systems and devices (e.g.,
Directive
Including a satellite
Reexamination Certificate
active
08035552
ABSTRACT:
A method for mitigating atmospheric errors in code and carrier phase measurements based on signals received from a plurality of satellites in a global navigation satellite system is disclosed. A residual tropospheric delay and a plurality of residual ionospheric delays are modeled as states in a Kalman filter. The state update functions of the Kalman filter include at least one baseline distance dependant factor, wherein the baseline distance is the distance between a reference receiver and a mobile receiver. A plurality of ambiguity values are modeled as states in the Kalman filter. The state update function of the Kalman filter for the ambiguity states includes a dynamic noise factor. An estimated position of mobile receiver is updated in accordance with the residual tropospheric delay, the plurality of residual ionospheric delays and/or the plurality of ambiguity values.
REFERENCES:
patent: 5991691 (1999-11-01), Johnson
patent: 6127968 (2000-10-01), Lu
patent: 6753810 (2004-06-01), Yang et al.
patent: 7312747 (2007-12-01), Vollath et al.
patent: 2005/0001762 (2005-01-01), Han et al.
patent: 2009/0262013 (2009-10-01), Vollath
patent: 1498745 (2005-01-01), None
patent: 1498745 (2006-04-01), None
Lawrence, David et al, “Decorrelation of Troposphere Across Short Baselines,” IEEE Plans 2006, pp. 94-102.
Chang, X.-W. et al., “MLAMBDA: A Modified LAMBDA Method for Integer Least-Squares Estimation,” Journal of Geodesy, vol. 79, No. 9, Dec. 2005, pp. 552-565.
De Jonge, P. et al., “The LAMBDA Method for Integer Ambiguity Estimation: Implementation Aspects,” Publications of the Delft Geodetic Computing Centre, No. 12, Aug. 1996, pp. 1-49.
Sivaraman, M.R. et al., “Applications of Kalman Filter in WAAS,” http://www.gisdevelopment.net/technology/gps/techgp0033pf.htm, May 12, 2002, pp. 1-6.
Dai, Liwen et al. Innovative Algorithms to Improve Long Range RTK Reliability and Availability. Proceedings of the 2007 National Technical Meeting of the Institute of Navigation, US. Jan. 24, 2007. pp. 860-872.
De Jonge,The Distributional Dependence of the Range on Triple Frequency GPS Ambiguity Resolution, ION NTM 2000, Jan. 26-29, 2000, Anaheim, CA, pp. 605-612.
International Search Report and Written Opinion, PCT/US2008/006608, Oct. 9, 2008, 9 pgs.
International Search Report and Written Opinion, PCT/US2008/006609, Oct. 9, 2008, 8 pgs.
Mowlam,Baseline Precision Results Using Triple Frequency Partial Ambiguity Sets, Proceedings of the 17th International Technical Meeting of the Satellite Division of the Institute of Navigation GNSS, Sep. 21-24, 2004, Long Beach, CA, pp. 2509-2518.
Office Action, U.S. Appl. No. 12/119,450, Sep. 28, 2010, 6pgs.
Park,Efficient Ambiguity Resolution Using Constraint Equation, IEEE Plans, 1996, pp. 277-284.
Teunissen,Geometry-free Ambiguity Success Rates in Case of Partial Fixing, Proceedings of the 1999 National Technical Meeting of the Institute of Navigation, Jan. 25, 1999, pp. 201-207.
Yang,A Fast Ambiguity Resolution Technique for RTK Embedded Within a GPS Receiver, NavCom Technology White Paper, Oct. 2006, 7 pgs.
Yang,Minimizing the Integer Ambiguity Search Space for RTK, NavCom Technology White Paper, Apr. 2005, 6 pgs.
Dai Liwen L.
Eslinger Daniel J.
Hatch Ronald R.
Sharpe Richard T.
Issing Gregory C
Morgan & Lewis & Bockius, LLP
Navcom Technology Inc.
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