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:
Feb. 29, 2000
Filed:
Apr. 06, 1999
Quyen Dan Hua, Fremont, CA (US);
Valentine L Denninger, Sunnyvale, CA (US);
Trimble Navigation Limited, Sunnyvale, CA (US);
Abstract
A system for processing a PPS (precise positioning service) signal from a GPS (global positioning system) satellite to obtain PPS based positioning information therefrom. A first GPS receiver is adapted to process a PPS signal from a GPS satellite. The first GPS receiver is further adapted to output CVas (Crypto Variable Anti Spoofing) and SA correction information corresponding to the PPS signal. A second GPS receiver is adapted to receive the CVas and SA correction information from the first GPS receiver. The second GPS receiver is further adapted to process the PPS signal using the SA correction information received from the first GPS receiver and generate PPS based positioning information therefrom. The second GPS receiver does not include a KDP(key data processor). Accordingly, the second GPS receiver is not as tightly controlled as the first GPS receiver.