FR3045839B1 - Procede d'imagerie radar et dispositif de d'imagerie radar associe - Google Patents

Procede d'imagerie radar et dispositif de d'imagerie radar associe Download PDF

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Publication number
FR3045839B1
FR3045839B1 FR1502609A FR1502609A FR3045839B1 FR 3045839 B1 FR3045839 B1 FR 3045839B1 FR 1502609 A FR1502609 A FR 1502609A FR 1502609 A FR1502609 A FR 1502609A FR 3045839 B1 FR3045839 B1 FR 3045839B1
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France
Prior art keywords
radar
sub
resolution
radar imaging
interest
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Active
Application number
FR1502609A
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English (en)
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FR3045839A1 (fr
Inventor
Tristan Porges
Luc Bosser
Thierry David Sfez
Jean Marc Chabroux
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Thales SA
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Thales SA
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Priority to FR1502609A priority Critical patent/FR3045839B1/fr
Publication of FR3045839A1 publication Critical patent/FR3045839A1/fr
Application granted granted Critical
Publication of FR3045839B1 publication Critical patent/FR3045839B1/fr
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Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S13/00—Systems using the reflection or reradiation of radio waves, e.g. radar systems; Analogous systems using reflection or reradiation of waves whose nature or wavelength is irrelevant or unspecified
    • G01S13/88—Radar or analogous systems specially adapted for specific applications
    • G01S13/89—Radar or analogous systems specially adapted for specific applications for mapping or imaging
    • G01S13/90—Radar or analogous systems specially adapted for specific applications for mapping or imaging using synthetic aperture techniques, e.g. synthetic aperture radar [SAR] techniques
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S13/00—Systems using the reflection or reradiation of radio waves, e.g. radar systems; Analogous systems using reflection or reradiation of waves whose nature or wavelength is irrelevant or unspecified
    • G01S13/88—Radar or analogous systems specially adapted for specific applications
    • G01S13/89—Radar or analogous systems specially adapted for specific applications for mapping or imaging
    • G01S13/90—Radar or analogous systems specially adapted for specific applications for mapping or imaging using synthetic aperture techniques, e.g. synthetic aperture radar [SAR] techniques
    • G01S13/9004—SAR image acquisition techniques
    • G01S13/9017—SAR image acquisition techniques with time domain processing of the SAR signals in azimuth
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S13/00—Systems using the reflection or reradiation of radio waves, e.g. radar systems; Analogous systems using reflection or reradiation of waves whose nature or wavelength is irrelevant or unspecified
    • G01S13/88—Radar or analogous systems specially adapted for specific applications
    • G01S13/89—Radar or analogous systems specially adapted for specific applications for mapping or imaging
    • G01S13/90—Radar or analogous systems specially adapted for specific applications for mapping or imaging using synthetic aperture techniques, e.g. synthetic aperture radar [SAR] techniques
    • G01S13/904—SAR modes
    • G01S13/9052—Spotlight mode

Landscapes

  • Engineering & Computer Science (AREA)
  • Remote Sensing (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • General Physics & Mathematics (AREA)
  • Signal Processing (AREA)
  • Radar Systems Or Details Thereof (AREA)

Abstract

La présente invention concerne un procédé d'imagerie radar à synthèse d'ouverture, ledit radar éclairant une zone à imager avec une période d'éclairement divisée en sous-périodes se chevauchant temporellement. Ledit procédé comprenant une étape de génération d'une sous-image radar de résolution R0 pour chaque sous-période et éventuellement plusieurs étapes itératives de recombinaison de sous-images radar afin d'améliorer leur résolution. Lorsque la résolution desdites sous-images radar atteint une première valeur prédéterminée, le procédé comprend une étape de détection de zones d'intérêt et d'extraction d'une imagette autour de chaque zone d'intérêt détectée. Pour chacune des zones d'intérêt, ledit procédé comprend plusieurs étapes itératives de recombinaison de sous-images radar afin d'améliorer leur résolution jusqu'à une deuxième valeur prédéterminée, suivie d'une éventuelle étape de traitement haute résolution.
FR1502609A 2015-12-16 2015-12-16 Procede d'imagerie radar et dispositif de d'imagerie radar associe Active FR3045839B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR1502609A FR3045839B1 (fr) 2015-12-16 2015-12-16 Procede d'imagerie radar et dispositif de d'imagerie radar associe

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR1502609A FR3045839B1 (fr) 2015-12-16 2015-12-16 Procede d'imagerie radar et dispositif de d'imagerie radar associe
FR1502609 2015-12-16

Publications (2)

Publication Number Publication Date
FR3045839A1 FR3045839A1 (fr) 2017-06-23
FR3045839B1 true FR3045839B1 (fr) 2019-03-29

Family

ID=55971045

Family Applications (1)

Application Number Title Priority Date Filing Date
FR1502609A Active FR3045839B1 (fr) 2015-12-16 2015-12-16 Procede d'imagerie radar et dispositif de d'imagerie radar associe

Country Status (1)

Country Link
FR (1) FR3045839B1 (fr)

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6255981B1 (en) * 1999-08-04 2001-07-03 Raytheon Company Method for range alignment and rotation correction of a high resolution image in an inverse synthetic aperture radar system
US8698668B2 (en) * 2008-11-11 2014-04-15 Saab Ab SAR radar system
FR2960300B1 (fr) * 2010-05-18 2014-01-03 Thales Sa Procede de construction d'images radar focalisees.

Also Published As

Publication number Publication date
FR3045839A1 (fr) 2017-06-23

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