CA2864501C - Correction d'erreur de phase en imagerie a ouverture synthetique - Google Patents

Correction d'erreur de phase en imagerie a ouverture synthetique Download PDF

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Publication number
CA2864501C
CA2864501C CA2864501A CA2864501A CA2864501C CA 2864501 C CA2864501 C CA 2864501C CA 2864501 A CA2864501 A CA 2864501A CA 2864501 A CA2864501 A CA 2864501A CA 2864501 C CA2864501 C CA 2864501C
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optical
signal
optical signal
data
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CA2864501A
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CA2864501A1 (fr
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Simon Turbide
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Institut National dOptique
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Institut National dOptique
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Priority to CA2864501A priority Critical patent/CA2864501C/fr
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    • 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
    • G01S7/00—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
    • G01S7/48—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S17/00
    • G01S7/497—Means for monitoring or calibrating
    • 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
    • G01S17/00—Systems using the reflection or reradiation of electromagnetic waves other than radio waves, e.g. lidar systems
    • G01S17/88—Lidar systems specially adapted for specific applications
    • G01S17/89—Lidar systems specially adapted for specific applications for mapping or imaging
    • G01S17/90—Lidar systems specially adapted for specific applications for mapping or imaging using synthetic aperture techniques

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

Abstract

Un procédé permettant de corriger des erreurs de phase dans un système dimagerie à ouverture synthétique configuré pour imager une zone cible dune scène depuis une plateforme en mouvement relatif par rapport à la scène est décrit. Le procédé consiste à acquérir des données à ouverture synthétique cibles à partir de la zone cible et des données à ouverture synthétique de référence à partir dune zone de référence de la scène à laide dune unité dacquisition à ouverture synthétique. Un ou plusieurs facteurs de correction sont déterminés à partir des données à ouverture synthétique de référence en fonction de lhypothèse selon laquelle la zone de référence présente une topographie connue. Les facteurs de correction de phase sont représentatifs des variations de longueur de trajet optique non compensées le long du trajet optique entre la zone de référence et lunité dacquisition à ouverture synthétique montée sur la plateforme. Une correction de phase est appliquée aux données à ouverture synthétique cibles en fonction des facteurs de correction de phase de manière à obtenir des données à ouverture synthétique cibles à phase corrigée. Un système dimagerie à ouverture synthétique mettant en uvre le procédé est également décrit.
CA2864501A 2014-09-19 2014-09-19 Correction d'erreur de phase en imagerie a ouverture synthetique Active CA2864501C (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CA2864501A CA2864501C (fr) 2014-09-19 2014-09-19 Correction d'erreur de phase en imagerie a ouverture synthetique

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CA2864501A CA2864501C (fr) 2014-09-19 2014-09-19 Correction d'erreur de phase en imagerie a ouverture synthetique

Publications (2)

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CA2864501A1 CA2864501A1 (fr) 2016-03-19
CA2864501C true CA2864501C (fr) 2017-12-19

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CA2864501A Active CA2864501C (fr) 2014-09-19 2014-09-19 Correction d'erreur de phase en imagerie a ouverture synthetique

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CA (1) CA2864501C (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110068833A (zh) * 2019-05-05 2019-07-30 中国科学院电子学研究所 一种合成孔径激光雷达成像方法、仪器及系统

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112987024B (zh) * 2019-08-23 2023-10-13 长沙天仪空间科技研究院有限公司 一种基于合成孔径激光雷达的成像装置及方法
CN111638040B (zh) * 2020-05-14 2022-04-19 中国科学院光电技术研究所 适用于光学合成孔径成像系统的离焦解耦指向校正方法

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110068833A (zh) * 2019-05-05 2019-07-30 中国科学院电子学研究所 一种合成孔径激光雷达成像方法、仪器及系统
CN110068833B (zh) * 2019-05-05 2021-10-29 中国科学院电子学研究所 一种合成孔径激光雷达成像方法、仪器及系统

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Publication number Publication date
CA2864501A1 (fr) 2016-03-19

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Effective date: 20161109