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. 16, 2022
Filed:
Aug. 25, 2020
Magellan Systems Japan, Inc., Hyogo, JP;
Toru Kondo, Hyogo, JP;
Magellan Systems Japan, Inc., Hyogo, JP;
Abstract
A GNSS receiver has a first antenna and a reference antenna. From the measurement of a carrier phase Lof GNSS signals at the first antenna and a reference carrier phase Lat the reference antenna, a single difference Lis obtained, whereby calculating a double difference L=L−Lbetween a k-th GNSS satellite and a reference satellite (k=0). The double difference Lis also predicted using known satellite position information as a function of a differencing vector ebetween a unit line-of-sight direction vector eof the k-th satellite and that of the reference satellite eand a base line vector Δ with a second integer bias N. A real time kinematic (RTK) positioning solution is calculated with ambiguity resolution based on the predicted value of Land the calculated value of L. A spoofing is detected if the RTK positioning solution yields Δ=0.