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:
Jun. 04, 2013
Filed:
May. 17, 2011
Liwen L. Dai, Chino Hills, CA (US);
Michael A. Zeitzew, Redondo Beach, CA (US);
Yiqun Chen, Torrance, CA (US);
Yujie Zhang, Lomita, CA (US);
Liwen L. Dai, Chino Hills, CA (US);
Michael A. Zeitzew, Redondo Beach, CA (US);
Yiqun Chen, Torrance, CA (US);
Yujie Zhang, Lomita, CA (US);
Deere & Company, Moline, IL (US);
Abstract
A satellite clock error is determined for each navigation satellite based on the pseudo-range code measurements, the carrier phase measurements, and broadcast satellite clock errors provided by a receiver network. Differences are determined between the computed satellite clock errors and the broadcast clock errors for each satellite. For each constellation, a clock reference satellite is selected from among the navigation satellites, where the clock reference satellite has the median value of clock error difference for that satellite constellation. A correction is determined for the broadcast clock error by applying a function of the reference satellite's clock error to the broadcast clock error for each satellite in the one or more constellations.