公开(公告)号：US10921355B2

公开(公告)日：2021-02-16

申请号：US15549199

申请日：2016-02-12

Applicant: AIRBUS DEFENCE AND SPACE SAS

Inventor： Mathieu Picard ,  Mehdi Anteur

IPC: G01R23/167 ,  G01R23/18

Abstract: A method for detecting a plurality of useful signals in a total signal. The useful signals correspond to radiofrequency signals emitted by different terminals in a multiplexing frequency band. A plurality of spectrograms calculated that have a compensated linear frequency drift and are respectively associated with different linear frequency drift values. For each analysis frequency and each spectrogram, time envelope filtering of the values is performed at the different times for analyzing the spectrogram at the analysis frequency using a filter representing a reference time envelope of the useful signals. A useful signal is detected at an analysis time and at an analysis frequency in response to a verification of a predefined detection criterion by the value from a spectrogram resulting from filtering at the analysis time and at the analysis frequency.

公开(公告)号：US11932423B2

公开(公告)日：2024-03-19

申请号：US17429270

申请日：2020-02-07

Applicant: AIRBUS DEFENCE AND SPACE SAS

Inventor： Benoît Series ,  Mathieu Picard ,  Jonathan Guerra

IPC: B64G1/10 ,  G01W1/10 ,  G05D1/00 ,  G06F18/2321 ,  G06K9/62 ,  G06V20/13

CPC classification number: B64G1/1021 ,  G01W1/10 ,  G05D1/0094 ,  G06F18/2321 ,  G06V20/13 ,  B64G1/1028

Abstract: Computer systems (100) for satellite image acquisition and mission-plan calculation devices (120) for satellite and also Earth observation satellites (110). Based on the observation that the uncertainty connected with meteorological conditions can lead to the development of mission plans, for satellites, with low effectiveness, the uncertainty is characterized and used to improve the preparation of mission plans for satellite. A model of the uncertainties is built upon observations and/or past meteorological forecasts. Next, at the time of planning, the model is used by presenting the observations and/or the current forecast as input to the model. In that way, the acquisition zones for which it is unlikely to get acceptable images on the preferred acquisition date may be identified.