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. 30, 2016
Filed:
Jan. 03, 2012
Jianhui Luo, Wayland, MA (US);
Wallace E. Vander Velde, Winchester, MA (US);
Huan-wan Tseng, Westford, MA (US);
Triveni N. Upadhyay, Concord, MA (US);
Jianhui Luo, Wayland, MA (US);
Wallace E. Vander Velde, Winchester, MA (US);
Huan-Wan Tseng, Westford, MA (US);
Triveni N. Upadhyay, Concord, MA (US);
Mayflower Communications Company, Inc., Bedford, MA (US);
Abstract
System and method for determining the roll rate and roll angle of a spinning platform. The IQ amplitude and/or phase characteristics of GPS signals received at a single receiver antenna are measured using the signals output directly by a correlator that is driven at the satellite tracking frequency used for forming the navigation solution. The roll rate and roll angle are determined in real time by a Roll filter, which is preferably an Extended Kalman Filter (EKF) employing probabilistic data association, whose inputs include the measured IQ characteristics and the navigation solution. Data from non-GPS measurement sources is optionally provided to update the navigation and/or roll solution.