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SAR Data Access & Availability ONE PAGER SERIES A quick reference to Synthetic Aperture Radar collecting- missions and where to obtain data. For more information, SAR Data Access check out the SAR Handbook: Comprehensive Methodologies for Forest Monitoring and Biomass Estimation and & Availability associated training materials at SERVIRglobal.net WAVELENGTH/ SENSOR LIFETIME POLARIZATION RESOLUTION FRAME SIZE REPEAT CYCLE ACCESS FREQUENCY L-band Az: 25m Seasat 1978 HH 100km - Free & open λ = 24.6cm Rg: 25m EXISTING DATA C-band AZ: 6-30m ERS-1 1991-2001 VV 100km 35 days Restrained λ = 05.6cm RG: 26m L-band Az: 18m JERS-1 1995-1998 HH 75km 44 days Restrained λ = 24.6cm Rg: 18m C-band Az: 6-30m ERS-2 1995-2011 VV 100km 35 days Restrained λ = 05.6cm Rg: 26m C-band HH, VV, VV/HH, Az: 28m ENVISAT 2002-2012 100km 35 days Restrained λ = 05.6cm HH/HV, VV/VH Rg: 28m FBS: HH, VV FBS: 10x10m FBS: 70km FBD: HH/HV, HH/VH L-band FBD: 20x10m FBD: 70km ALOS-1 2006-2011 PLR: HH/HV 46 days Free & open λ = 24.6cm PLR: 30x10m PLR: 30km /VH /VV ScanSAR: 100m ScanSAR: 250-350km ScanSAR: HH, VV Standard: 25x28m Standard: 100km 1995-2008: Fine: 9x9m Fine: 45km C-band Restrained Radarsat-1 1995-2013 HH Wide1: 35x28m Wide1: 165km 24 days λ = 05.6cm 2008-2013: Wide2: 35x28m Wide2:150km Commercial ScanSAR: 50x50-100x100m ScarSAR: 305-510km Application- Single: HH, VV Spotlight: 3-10km X-band Spotlight: 0.2x1.0-1.7x3.5m dependent; TerraSAR-X 2007- Dual: HH/VV, HH/HV, VV/VH Stripmap: 50x30km λ = 03.5cm Stripmap: 3x3m 11 days restrained TanDEM-X 2010- Twin: HH/VV, HH/VH, ScanSAR: 150x100- ScanSAR: 18-40m scientific, VV/VH 200x200km commercial Spotlight: 18x8km Single: HH, VV, HV, VH Spotlight: ~1.5m C-band Stripmap: 20-170m Radarsat-2 2007- Dual: HH/HV, VV/VH Stripmap: ~3x3-25x25m 24 days Commercial λ = 05.6cm ScanSAR: 300x300- Quad: HH/HV/VH/VV ScanSAR: 35x35-100x100m 500x500km Spotlight: 10x10km Spotlight: ≤1m Commercial; COSMO- X-band Single: HH, VV, HV, VH Stripmap: 40x40km Satellite: 16 days 2007- Stripmap: 3-15m limited proposal- SkyMed λ = 03.5cm Dual: HH/HV, HH/VV, VV/VH ScanSAR: 100x100 - Constellation: ~hrs ScanSAR: 30-100m based scientific 200x200km Spotlight: 25x25km Single: HH, VV, HV, VH Spotlight: 1x3m Commercial; ALOS-2 L-band Stripmap: 55x70- 2014- Dual: HH/HV, VV/VH Stripmap: 3-10m 14 days limited proposal- PALSAR-2 λ = 24.6cm 70x70km Quad: HH/HV/VH/VV ScanSAR: 25-100m based scientific ScanSAR: 355x355km Stripmap: 5x5m Interferometric Wide Swath Stripmap: 375km Satellite: 12 days C-band Single: HH, VV Sentinel-1 2014- (IW): 5x20m IW: 250km Constellation: Free & open λ = 05.6cm Dual: HH/HV, VV/VH Extra Wide Swath (EW): EW: 400km 6 days 20-40m Single: HH, VV Satellite: 16 days L-band Stripmap: 10x10m Stripmap: >65km SAOCOM 2018- Dual: HH/HV, VV/VH Constellation: TBD λ = 24.6cm TopSAR: 100x100m TopSAR: 320km Quad: HH/HV/VH/VV 8 days X-band *See TerraSAR/ *See TerraSAR/ *See TerraSAR/ PAZ SAR 2018- 11 days Commercial λ = 03.5cm TanDEM-x TanDEM-x TanDEM-x EXPECTED WAVELENGTH/ SENSOR POLARIZATION RESOLUTION FRAME SIZE REPEAT CYCLE ACCESS LAUNCH FREQUENCY Single: HH, VV, VH, HV Very high, high, medium, C-band Dual: HH/HV, VV/VH, HH/VV Satellite: 12 days RCM 2019 and low-res modes 20x20-500x500km TBD FUTURE DATA λ = 05.6cm Compact Constellation: ~hrs (3-100m) Quad Single: HH, VV, VH, HV L-band NISAR 2021 Dual: HH/HV, VV/VH, HH/VV 3-20m (mode dependent) 250km 12 days Free & open λ = 24.6cm Quad P-band BIOMASS 2021 Quad ≤60x50m 160km 17 days Free & open λ = 70cm Satellite: 16 days L-band TanDEM-L 2023 Single, dual, quad modes 12x12m 350km Constellation: Free & open λ = 24.6cm 8 days SOURCE: Meyer, Franz. “Spaceborne Synthetic Aperture Radar – Principles, Data Access, and Basic Processing Techniques.” SAR Handbook: Comprehensive Methodologies for Forest Monitoring and Biomass Estimation. Eds. Flores, A., Herndon, K., Thapa, R., Cherrington, E. NASA. .
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