公开(公告)号：US11506751B2

公开(公告)日：2022-11-22

申请号：US16692970

申请日：2019-11-22

Applicant: THALES

Inventor： Pierre-Albert Breton ,  Vincent Corretja ,  Richard Montigny ,  Stéphane Kemkemian

IPC: G01S7/292 ,  G01S13/91 ,  G01S13/56 ,  G01S13/72

Abstract: Upon each new detection, called pivot detection, by a radar system, the method includes the steps consisting of: grouping together, with the pivot detection, grouped detections, defined as detections that belong to a sweep preceding the sweep of the pivot detection and that have a non-nil probability according to a grouping criterion; filtering the grouped detections so as to keep only detections that are kinematically strictly coherent with the pivot detection, by: initializing a histogram, each dimension of which is a temporal variation of a coordinate measured by the radar system; computing a potential value interval for each coordinate of the pivot detection and each grouped detection; computing a minimum temporal variation and a maximum temporal variation for the or each coordinate from potential value intervals of the pivot detection and each grouped detection; incrementing the set of classes of the histogram whose index along each dimension is located between the computed minimum and maximum temporal variations; and detecting a target once at least one class of the histogram reaches a predefined value.

公开(公告)号：US11668813B2

公开(公告)日：2023-06-06

申请号：US15734667

申请日：2019-06-13

Applicant: THALES

Inventor： Pierre-Albert Breton ,  Vincent Corretja ,  Richard Montigny ,  Stéphane Kemkemian

IPC: G01S13/88 ,  G01B15/02

CPC classification number: G01S13/88 ,  G01B15/02 ,  G01S13/882

Abstract: A method for determining wave height by means of a radar carried by an aircraft, the method implementing the following steps: a first step of pointing the antenna of the radar; a second step of determining the clutter acquisition plan according to the altitude of the aircraft; a third step of determining, for each clutter zone defined by the acquisition plan, two Doppler parameters PARA1 and PARA2 characterising the zone as a whole; a fourth step of calculating the average values of the parameters PARA1 and PARA2 over all of the zones in question; and a fifth step of estimating the wave height from the averages of the parameters PARA1 and PARA2. The wave height estimated in this way is transmitted to the aircraft and used to determine the conditions for the water landing of the aircraft.