KIGAMKIGAM ArcSAR 시스템 설계 및 제작 대한원격탐사학회 춘계학술발표회 1) 조성준, 2) 이훈열, 1) 김광은, 2)1) 이재희, 1) 성낙훈 1)한국지질자원연구원 2)강원대학교 지구물리학과

Engineering geophysics KIGAMKIGAM Agenda 연구배경 및 목적 Concept of ArcSAR Hardware configuration of ArcSAR Imaging geometry of ArcSAR Arc rail system 향후 추진 계획

Engineering geophysics KIGAMKIGAM 연구배경 및 목적 레일형 GB-SAR는 반복측정을 통해 mm 이내의 변 형까지 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

Engineering geophysics KIGAMKIGAM 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: R 2 = 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

Engineering geophysics KIGAMKIGAM System Configuration

Engineering geophysics KIGAMKIGAM GB-SAR System(KIGAM-KNU)

Engineering geophysics KIGAMKIGAM ArcSAR Concept AWS

Engineering geophysics KIGAMKIGAM GB-SAR vs ArcSAR GB-SARArcSAR(World first) Scan TypeLinearArc Scan LoadHeavyLight RF stabilityStable ResolutionHigh Higher due to wider azimuth bandwidth InstallationGround-fixed Automobile: higher mobility Phase repeatabilityHighLow (Still now) SAR focusingConventionalNew Major application DInSAR change detection Emergency Mapping (Still now) DInSAR change detection (future)

Engineering geophysics KIGAMKIGAM ArcSAR Hardware configuration

Engineering geophysics KIGAMKIGAM VNA(Vector Network Analyzer)  Stepped frequency  Both of Tx and Rx  Flexibility  10 MHz – 20 GHz

Engineering geophysics KIGAMKIGAM Antenna(C-band) H-Pol radiation pattern Dual-Polarimetric Square Horn Antenna Frequency(GHz)5.0~5.6 Beam Width E-Plane(deg)15(nominal) 12.1~13 H-Plane(deg)15(nominal)15.5~17.5 Gain(dBi)20(nominal)20.5 min.(20.5~21.8) VSWR1.5 max.1.4 max. Isolation 35dB 이하 50dB 이하 Weight(kg)4 max.3.1 max. Input Impedance(Ω)50

Engineering geophysics KIGAMKIGAM Antenna(X-band) 항목시험결과 Frequency [GHz]9.65 ± 0.5 Return loss [dB]-14.3 max Isolation [dB]-40 max Gain [dBi]21.7 min ConnectorType N female Input Impedance [Ω]50

Engineering geophysics KIGAMKIGAM Amp  Operating Freq.: 2~6 GHz  Power Gain: 34 dB  Maximum input: 6 dBm  Operating Freq.: 8~10.5 GHz  Output Power: 6 W

Engineering geophysics KIGAMKIGAM Controller (PXI) and RF switch

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

Engineering geophysics KIGAMKIGAM Design of a arc-rail

Engineering geophysics KIGAMKIGAM ArcSAR Standard Mode : 360˚ coverage with moderate resolution

Engineering geophysics KIGAMKIGAM ArcSAR Spot Mode : Limited coverage with higher resolution

Engineering geophysics KIGAMKIGAM Arc rail system

Engineering geophysics KIGAMKIGAM Arc rail lift

Engineering geophysics KIGAMKIGAM 향후 추진계획 현장 테스트(GB-SAR와 비교실험) 위치보정 알고리듬 개발 모니터링 테스트