Journal of Korean Society for Geospatial Information Science (대한공간정보학회지)

Korea Spatial Information Society (대한공간정보학회)
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Evaluation of 3D-Positioning Method Using X-band SAR Satellite Images - Focused on InSAR, Radargrammetry and RPC

X-band SAR 위성영상의 3차원 위치결정 기법 평가 - 레이더 간섭기법, Radargrammetry, RPC를 중심으로

  • Song, Yeong Sun (Dept. of Aerial Geoinformatics, Inha Technical College) ;
  • Lee, Jung Han (Dept. of Electronics and Communications Engineering, Kwangwoon University) ;
  • Jang, In Tae (Dept. of Civil Engineering, Incheon National University)
  • 송영선 (인하공업전문대학 항공지리정보과) ;
  • 이정한 (광운대학교 전자통신공학과) ;
  • 장인태 (인천대학교 건설환경공학전공)
  • Received : 2014.10.31
  • Accepted : 2014.11.25
  • Published : 2014.12.31
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Abstract

Korea's first X-band SAR satellite KOMPSAT-5 has been launched in 2013, so the research related to the X-band SAR satellite image is required to increase the utilization of KOMPSAT-5. In this study, we generated a DEM(Digital Elevation Model) using X-band SAR satellite images based on three methods which are InSAR, radargrammetry and RPC(Rational Polynomial Coefficients), and evaluated the performance of each methods. The four stripmap mode TerraSAR-X images taken in Daejeon were used to generate DEM, and accuracy was evaluated using DEM by IKONOS RPC. As results, DEM produced by the InSAR showed the highest accuracy. Also, we knew that RPC could be effective method if you want to create a large area DEM which contains the various elevation.

2013년 우리나라 최초의 X-band SAR 위성인 KOMPSAT-5가 발사되었고, KOMPSAT-5의 활용성 측면에서 X-band SAR 위성영상에 대한 연구가 필요한 상황이다. 본 연구에서는 X-band SAR 위성영상에 대해서 수치표고모델을 생성할 수 있는 세 가지 기법(레이더 간섭기법, radargrammetry, RPC)을 적용하여 수치표고모델을 생성하고, 각 기법별 정확도 및 장단점을 평가하였다. 실험 위성영상으로 대전지역을 촬영한 4장의 stripmap mode TerraSAR-X 영상을 이용하였고, 정확도 평가를 위해서 IKONOS 입체영상으로부터 생성된 수치표고모델을 이용하였다. 평가결과, 레이더 간섭기법으로 제작한 수치표고모델이 가장 높은 정확도를 보였고, 지형의 기복이 심한 넓은 지역에 대하여 수치표고모델을 생성하고자 할 경우에는 RPC를 이용하는 것이 효과적인 기법임을 알 수 있었다.

Keywords

References

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