1 / 21

차량탑재형 ArcSAR 시스템 개념설계

차량탑재형 ArcSAR 시스템 개념설계. 2008. 3. 21. 대한원격탐사학회 춘계학술발표회. 1) 조성준 , 2) 이훈열 , 1) 김광은 1) 한국지질자원연구원 2) 강원대학교. Agenda. 연구배경 및 목적 Introduction of GB-SAR Concept of ArcSAR Hardware configuration of ArcSAR Imaging geometry of ArcSAR 향후 추진 계획. 연구배경 및 목적.

clea
Download Presentation

차량탑재형 ArcSAR 시스템 개념설계

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. 차량탑재형 ArcSAR시스템 개념설계 2008. 3. 21. 대한원격탐사학회 춘계학술발표회 1)조성준, 2)이훈열, 1)김광은 1)한국지질자원연구원 2)강원대학교

  2. Agenda • 연구배경 및 목적 • Introduction of GB-SAR • Concept of ArcSAR • Hardware configuration of ArcSAR • Imaging geometry of ArcSAR • 향후 추진 계획

  3. 연구배경 및 목적 • 레일형 GB-SAR는 반복측정을 통해 mm 이내의 변형까지 감지할 수 있는 높은 분해능을 자랑 • 레일을 모니터링 위치에 고정시켜야 하는데 고정밀 레일의 제작비용이 매우 비싸며, 측정장치의 운반과 설치 역시 매우 복잡 • 차량에 원형레일을 탑재하여 신속한 기동을 확보 • 합성구경의 길이를 늘리며 영상영역을 확장한 Arc-SAR 개발

  4. GB-SAR • 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

  5. SAR Focusing – Point Target azimuth range • original • After range compression • After migration • After azimuth compression

  6. State of the art of GB-SAR • LISA SAR (Italy) • GB-POLInSAR (Australia) • GB-SAR (Japan) • Mobile SAR (Korea)

  7. GB-SAR(KIGAM-KNU) • DInSAR tested: Phase stability of 1° (0.1mm range) was achieved for several hours for stable reflectors, rendering phase change of 10 ° to be assured (1mm accuracy). • PSInSAR displacement measurement: R2=0.9999 achieved. • 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

  8. System Configuration

  9. GB-SAR System(KIGAM-KNU)

  10. SAR Focusing Algorithms

  11. ArcSAR Concept design AWS AWS

  12. GB-SAR vs ArcSAR

  13. ArcSAR Hardware configuration

  14. VNA(Vector Network Analyzer) • Stepped frequency • Both of Tx and Rx • Flexibility • 10 MHz – 20 GHz

  15. Antenna H-Pol radiation pattern

  16. Amp and RF switch • Operating Freq.: 2~6 GHz • Power Gain: 34 dB • Maximum input: 6 dBm • Operation Freq.: ~20GHz • GPIB interface • 3중 1X2 SPDT

  17. Acquisition software Start Callibration Initialize all system Move to start position Acquisition Call cal:VV:Switching: Call cal:VH:Switching: Call cal:HV:Switching: Call cal:HH:Switching Save data Move or Stop End

  18. Design of a arc-rail

  19. ArcSAR Standard Mode: 360˚ coverage with moderate resolution

  20. ArcSAR Spot Mode: Limited coverage with higher resolution

  21. 향후 추진계획 • ArcSAR 레일 제작 • 자료획득 프로그램 개발 • ArcSAR 포커싱 알고리듬 개발 • 획득 및 자료처리 프로그램 통합 • 현장 테스트(GB-SAR와 비교실험) • 위치보정 알고리듬 개발 • 모니터링 테스트

More Related