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GB-SAR System Development and Applications in 2007 Chuncheon Conference

Explore the development and applications of Ground-Based Synthetic Aperture Radar system presented at the 2007 Chuncheon Conference. Learn about SAR focusing, interferometry, and diverse applications such as safety monitoring and target backscattering. Exciting insights and future prospects are discussed.

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GB-SAR System Development and Applications in 2007 Chuncheon Conference

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  1. 대한원격탐사학회 2007 춘계학술대회 3월 30일 대전 대덕컨벤션타운 GB-SAR 시스템의 개발과 응용 이훈열, 조성준, 성낙훈 강원대학교 지구물리학과 한국지질자원연구원 지반안전연구부

  2. Contents • Introduction • GB-SAR System • SAR Focusing and Interferometry • Applications • Conclusion

  3. Introduction • GB-SAR: Ground-Based Synthetic Aperture Radar • Synthetic Aperture Radar • Imaging Radar • Azimuth aperture synthesis • Ground-Based • Fairly versatile system configuration • Multiple frequency (L, C, X, Ku, Ka, etc) • Full Polarization (VV, VH, HV, HH) • Ultimate SAR focusing • Zero Doppler centroid (stationary vehicle during Tx/Rx) • Accurate estimation of Doppler rate from geometry • Topography Mapping: Cross-Track InSAR or Delta-K InSAR • Surface Motion: Zero-baseline and short atmospheric path for Temporal Coherency, DInSAR and PSInSAR • Useful for new SAR concept design • Previous Works • LISA (EU) for Avalanche and landslide monitoring • Other laboratory or field tests (UK, Japan)

  4. GB-SAR System

  5. System Configuration

  6. SAR Focusing Algorithms

  7. GB-SAR Resolutions Range resolution: (a) Full Focusing (b) Partial Focusing

  8. GB-InSAR Configuration • DInSAR • Cross-Track InSAR • Delta-K InSAR • Cross-Track and Delta-K InSAR DInSAR with range change Cross-Track InSAR

  9. GB-SAR Interferometry

  10. KIGAM Roof-Top Test • T1 Range: Center frequency=5.3GHz Bandwidth=200MHz Sample=1601 Power=33dBm (2W) Azimuth: Scan length=5m Step=5cm Sample=101 • T2: Temporal baseline of 20minutes (DInSAR) • T3: Spatial baseline of -30cm vertical (InSAR DEM) • T4: Frequency shift of -10MHz (Delta-K InSAR)

  11. Image Area

  12. VV T1

  13. VH T1

  14. HH T1

  15. DInSAR (T2-T1) VV

  16. Cross-Track InSAR (T3-T2) VV

  17. Delta-K InSAR (T4-T3) VV VV

  18. Cross-Track and Delta-K InSAR (T4-T2) VV VV VV

  19. Automatic Acquisitionwith 2cm Step, 2007. 3. 19 7:22pm- 4:20am, A1~A9 VV HH

  20. Phase Errors Ideal Case A6-A5, HH Azimuth scan shift of 2cm. A9-A1, HH Range System Shift of 2mm

  21. Conclusion • We made a SAR system. • A GB-SAR system was developed, tested, and waiting for applications. • Optimal GB-SAR focusing algorithms were tested. • Cross-Track and Delta-K InSAR were tested. • DInSAR or PSInSAR were tested: Phase stability of 1° (0.1mm range) was achieved for several hours for stable reflectors, rendering phase change of 10 ° meaningful (1mm range accuracy for DInSAR). • GB-SAR can be used for various applications such as: • Safety monitoring of natural or anthropogenic structures • Microwave backscattering properties of target • New SAR system concept design • More robust GB-SAR system optimized to a specific application will be developed.

  22. Thank You

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