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. 12, 2022
Filed:
Jul. 31, 2019
Thales, Courbevoie, FR;
Thierry Mazeau, Merignac, FR;
Patrick Garrec, Merignac, FR;
THALES, Courbevoie, FR;
Abstract
The method carries out a measurement of the distance from the ground of an aircraft by undertaking the emission of waveforms making it possible to obtain, after demodulation, of the signals received in return and sampling of the demodulated signals at a frequency F, two signals E*(t) and E*(t), taking the form of two frequency ramps, of respective slopes Kand K, of respective passbands Band Band of respective durations Tand T, the N-point FFT spectral analysis of which is carried out. The values of the durations Tand Tas well as those of the passbands Band B, are defined in such a way as to be able to determine, on the basis of the spectra of the signals E*(t) and E*(t), a measurement of non-ambiguous distance dcovering the maximum distance dto be instrumented and an ambiguous distance dexhibiting the desired distance resolution. The distance d to be measured being determined by combining these two measurements.