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:
Oct. 25, 2011
Filed:
Feb. 20, 2009
Kendall Ferguson, Stafford, VA (US);
Benjamin W. Remondi, Dickerson, MD (US);
Michael Timo Allison, East Grimstead, GB;
Michael Albright, Manassas, VA (US);
Kendall Ferguson, Stafford, VA (US);
Benjamin W. Remondi, Dickerson, MD (US);
Michael Timo Allison, East Grimstead, GB;
Michael Albright, Manassas, VA (US);
Trimble Navigation Limited, Sunnyvale, CA (US);
Abstract
A method of communicating corrections for information related to satellite signals among global navigation satellite system (GNSS) receivers is described. An ionosphere correction for ionosphere signal path delay is determined for a first satellite. This ionosphere correction is then compared to an ionosphere correction for ionosphere signal path delay for a satellite assumed to be directly over the receiver. The receiver then sends a message which includes only the difference between the ionosphere correction for the actual observation and the ionosphere correction for a satellite assumed to be at the zenith.