The Journal of Korean Institute of Electromagnetic Engineering and Science (한국전자파학회논문지)

The Korean Institute of Electromagnetic Engineering and Science (한국전자파학회)
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Analysis of a Target's Power-Spill Patterns Using Squint SAR Images

Squint SAR 영상 내 목표물 분산전력패턴 분석기법

  • Hwang, Ji-Hwan (School of Earth and Environmental Science, Seoul National University) ;
  • Kim, Duk-Jin (School of Earth and Environmental Science, Seoul National University) ;
  • Lee, Seung-Chul (School of Earth and Environmental Science, Seoul National University) ;
  • Han, Seung-Hoon (AESA Radar R&D Center, Hanwha Systems) ;
  • Cho, Jae-Hyoung (AESA Radar R&D Center, Hanwha Systems) ;
  • Moon, Hyoi (AESA Radar R&D Center, Hanwha Systems)
  • 황지환 (서울대학교 지구환경과학부) ;
  • 김덕진 (서울대학교 지구환경과학부) ;
  • 이승철 (서울대학교 지구환경과학부) ;
  • 한승훈 (한화시스템 AESA 레이다 개발센터) ;
  • 조재형 (한화시스템 AESA 레이다 개발센터) ;
  • 문효이 (한화시스템 AESA 레이다 개발센터)
  • Received : 2018.07.12
  • Accepted : 2018.08.28
  • Published : 2018.09.30
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Abstract

This paper presents an analysis technique for estimating the properties of a target's power-spill patterns observed in reconstructed SAR images, which in turn depend on the setup squint angle of the FMCW signal-based SAR system. The target responses observed in the reconstructed SAR images were affected by the range-direction and azimuth-direction of a wave projected on the ground, and the obtained results were analyzed by applying three-dimensional squinted SAR geometry. Furthermore, the rotation patterns were verified through simulations based on the FMCW signal model and back-projection algorithm. This paper summarizes the obtained evaluation results as a function of SAR geometry and squint angle.

본 논문에서는 FMCW(frequency modulated continuous wave) 신호기반 SAR 시스템의 스퀸트 각도(squint angle) 설정에 따른 복원영상 내 목표물 분산전력패턴 변화를 예측하기 위한 분석기법에 대해 설명한다. SAR 복원영상 내 목표물 분산 전력패턴은 지면에 투영된 전파진행방향과 합성개구면과 스퀸트 각도가 이루는 방위방향에 따라 일정한 방향으로 변형된 특성을 갖게 되며, 이와 같은 특성변화를 3차원 SAR 기하구조 내에서 분석한다. 스퀸트 설정각도에 따라 변형된 목표물 분산전력패턴은 FMCW 신호모델과 back-projection 알고리즘을 기반으로 한 모의실험을 통해 그 분석결과를 검증한다. 또한, 변형된 분산전력패턴의 예측결과는 SAR 기하구조와 스퀸트 설정각도를 변수로 정리된다.

Keywords

References

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