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:
Apr. 22, 2003
Filed:
Oct. 02, 2001
Applicant:
Inventors:
Roger Hayward, San Francisco, CA (US);
Richard Fuller, Campbell, CA (US);
Assignee:
SkyNetix, LLC, Fountain Valley, CA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G01S 5/02 ; H04B 7/185 ;
U.S. Cl.
CPC ...
G01S 5/02 ; H04B 7/185 ;
Abstract
A method of using altitude information to arrive at a more accurate GPS position. A 3D GPS position is used as an initial estimate. The latitude and longitude of the initial estimate are used to retrieve an altitude from a database. This altitude is used to calculate a 2D GPS position. The 2D GPS position is then used to retrieve another altitude from the database, and the calculate-retrieve process is continued until the calculation converges.