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:
Jul. 26, 2011
Filed:
Jul. 07, 2008
Tadatomi Ishigami, Tokyo, JP;
Masatoshi Fujii, Tokyo, JP;
Keika Kan, Tokyo, JP;
Sadami Ouchi, Tokyo, JP;
Hiroaki Kato, Tokyo, JP;
Takeshi Nita, Tokyo, JP;
Atsushi Mori, Tokyo, JP;
Tadatomi Ishigami, Tokyo, JP;
Masatoshi Fujii, Tokyo, JP;
Keika Kan, Tokyo, JP;
Sadami Ouchi, Tokyo, JP;
Hiroaki Kato, Tokyo, JP;
Takeshi Nita, Tokyo, JP;
Atsushi Mori, Tokyo, JP;
Mitsubishi Electric Corporation, Tokyo, JP;
Abstract
A navigation equipment includes a user position observing unitfor calculating the position of the navigation equipment by using the pseudo range and position of each GPS satellite, and a pseudo range error, a user velocity and heading observing unitfor calculating the velocity of the navigation equipment from a measured range rate, the position of each GPS satellite, and the position of the navigation equipment, and a user heading searching unitfor, when a multipath error is smaller than a specified value, searching for, as the heading of the navigation equipment, a heading whose range rate, which is calculated from a relative movement between the navigation equipment when the navigation equipment changes its heading within a predetermined angle range and a GPS satellite, matches the measured range rate.