Milestoes of Radar ISAR Geometry B A1 A2 θ Radar, 1904 ---0 SAR (Sythetic Aperture Radar), 1952 ---48 ISAR (Iterferometric SAR, IfSAR), 1974 ---22 DISAR (Differetial ISAR), 1993 ---19 PSISAR, 2000 ---7 φ flat= 4 π z 4 π Bcos( θ 0 α) + r λ r 0siθ0 λ Sigle-pass ISAR Repeat-pass pass ISAR Alog-track ISAR Across-track ISAR H r r + d G Across-track repeat-pass pass ISAR h JERS-1 ERS-1 Radar Platforms - Satellites ERS-2 Radarsat-1 ENVISAT Satellite Availability (TerraSAR-L ad other plaed missios are NOT icluded) ALOS Radarsat-2 Radar Platforms Shuttle SRTM (Shuttle Radar Topography Missio) SRTM Sigle-pass ISAR
Tree or Groud? ISAR vs GPS C - Bad Wavelegth 5.6 cm Resolutio: 25 m Scatterig: reflected at the top of caopy. L Bad Wavelegth 23.5 cm Resolutio: 18 m Scatterig: able to peetrate through vegetatio. Spatial resolutio Temporal resolutio Measuremet ISAR High (pixel size: 3 20 m) Low 24, 35, or 44 days (weekly) 1D (LOS), relative GPS Low (GEONET - 20km) High (30 secods) 3D (ENH), absolute Maturity Techology, resources, applicatios GNSS (+ GLONASS, Beidou, Galileo, QZSS) Compoets of ISAR-GPS-GIS GIS itegratio GIS for mie subsidece Third party GPS software e.g. Berese Third party ISARsoftware e.g. Atlatis EarthView ISAR UNSW GPS processig procedures UNSW ISAR-GPS-GIS Itegratio Software UNSW ISAR processig procedures Third party GIS software e.g. ArcGIS UNSW GIS processig procedures GPS-ISAR results Positio, Dec-Ja 2003, P28 The NGIS Australia Cosortium has bee selected as the preferred tederer to provide the NSW Mie Subsidece Board with fully itegrated iformatio maagemet system. The system will iclude a documet maagemet system ad a Oracle-based property system. It will be itegrated usig ESRI ArcGIS products. Missio accomplished? ISAR Software Available Atlatis EarthView ISAR (Caada) Phoeix PulSAR (UK) Vexcel 3D SAR (USA) SPOT HRV image acquired o 2 August 1999 at 01:40 UT.
GIS Software Available Widows XP ArcMap ArcView ARC/INFO ER Mapper Reflectors OTM: Overlay Tiepoitig Method Twi Water Taks ISAR Geerated DEM 3
Impact of DEM Quality o DISAR Results 1992 LadersQuake Applicatios Mappig co-seismic deformatio I 1993 Frech scietists Massoet et al (Nature 1993) used ERS-1 SAR imagery together with the USGS DEM to map the co-seismic deformatio of the 1992 Laders Earthquake i Califoria. The DISAR result (left) agrees well with the result from the half -space elastic model (right). SeisSearch Project: the Cocept Massoet & Feigl, GRL, 1995 Applicatios volcao moitorig Global search for earthquakes mapped by the ERS tadem missio hours A1 A2 t (days) N*T A1 A2 T = 24, 35, or 44 days Massoet 1997 4
Applicatios glacier movemet Applicatios ladslide moitorig Image Credits: Received by CCRS Pre-processed by RSI Iterpretatio: Laurece Gray, CCRS KarimMattar, Itermap Paris Vacho, CCRS CSA, 1996 Source: http://www.gamma -rs.ch/research/mexico.html Prudhoe Bay, Alaska Applicatios Sea ice moitorig Eos,Vol. 85, No. 34, 24 August 2004 The Kolyma River, the East Siberia Sea Souther Part Norther Part Poit Barrow, Alaska Prudhoe Bay: (a) Iterferogram derived from ASF products 82591500 ad 82592500, 18-21 Ja 92; (b) Iterferogram derived from ASF products 82592500 ad 82593500, 21-24 Ja 92; (c) Iterferogram derived from ASF products 82594500 ad 82595500, 27-30 Ja, 1992. 21-30 Jauary, 1994 1-7 March, 1994 The compariso of resolutios Costellatios of ISAR Satellites ERS tadem DISAR: +/+/- 2 mm. JERS-1 repeatjersrepeat-pass DISAR: +/+/- 1 cm (or 10 mm). We eed costellatios of ISAR satellites i order to address challegig applicatios such as earthquake moitorig. Chiese: a group of 8 disaster mitigatio satellites (4 SAR ad 4 optical), 3 will be lauched before ed of 2006 (oe SAR, two optical satellites); Earthquake Satellite (Prof Cheg Yog of CEA). NASA: ECHO Earth Chage ad Hazard Observatory). Europe: TerraSAR -X, - L. Europe: EVINSAR, Oxford Uiversity, Uiversity of Readig. 5
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