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:
Jan. 09, 2001
Filed:
Jan. 15, 1999
Jean-Pierre Arethens, Beaumont les Valence, FR;
Sextant Avionique, Velizy Villacoublay, FR;
Abstract
A satellite signal GPS receiver which is located at a fixed station on the ground. The receivers are used in differential position measurement systems. In order to eliminate as much as possible the influence of multipaths on the precision of the measured position, it is detected whether the position measurements are coherent with the velocity measurements, The coherence is measured by the variations in the difference V,−dPRC,/dt, where V,is the relative velocity measured along the axis of the i,satellite and dPRC/dt is the time variation of the measured position. If the coherence is not sufficient, the position variation should not correspond to the measured velocity. The measurement of this satellite is then considered to be tainted with error and the satellite is eliminated. In the absence of multipaths, the above difference should be seen to vary periodically. This variation may be detected by a Fourier transform on a sufficient number of measurement samples.