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, 2018
Filed:
Sep. 15, 2015
Applicant:
Fugro N.v., Leidschendam, NL;
Inventor:
Liu Xianglin, Leidschendam, NL;
Assignee:
FUGRO N.V., , NL;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G01S 19/44 (2010.01); G01S 19/24 (2010.01); G01S 19/07 (2010.01);
U.S. Cl.
CPC ...
G01S 19/44 (2013.01); G01S 19/24 (2013.01); G01S 19/07 (2013.01);
Abstract
Method for precise GNSS positioning system with improved ambiguity estimation. The method is based on the realization that, especially during convergence, the estimated float ambiguities are biased when estimated simultaneously with the ionosphere parameters. The 'ionosphere-like' biases can be separated from the actual float ambiguities by using the fixed wide-lane (or extra wide-lane) integer ambiguities. The original real-valued ambiguities (e.g., one of L1, L2 and L5 in the GPS case) are corrected using the corresponding biases, resulting in reliable float ambiguities that are taken as input in the next processing step.