The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 14, 2012
Filed:
Sep. 06, 2011
Liwen L. Dai, Chino Hills, CA (US);
Daniel J. Eslinger, Huntington Beach, CA (US);
Richard T. Sharpe, Torrence, CA (US);
Ronald R. Hatch, Willington, CA (US);
Liwen L. Dai, Chino Hills, CA (US);
Daniel J. Eslinger, Huntington Beach, CA (US);
Richard T. Sharpe, Torrence, CA (US);
Ronald R. Hatch, Willington, CA (US);
Navcom Technology, Inc., Torrance, CA (US);
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.