Instrument | Operation time | Wavelength (cm) | Swath width (km) | Ground pixel resolution (m) | Repeat time (days) |
---|---|---|---|---|---|
ERS-1,2 | 1991- 2000; 1995-2011 (gyroscope malfunction 2000 severely limits use) | 5.6 | 80-100 | 26 x 6 | 35 |
JERS-1 | 1992-1998 | 23.5 | 75 | 18 x 6 | 44 |
RADARSAT-1, 2 | 1995-2013 (1); 2008 – (2) | 5.6 | multiple modes, including: 50 (Fine Beam Mode); 100 (Standard); 500 (ScanSAR Wide). | multiple modes including: 5 × 8 (Fine Beam Mode); 25 × 28 (Standard); 100 (ScanSAR Wide) | 24 |
ENVISAT | 2002-2012 | 5.6 | 100 (image mode); 400 (wide swath) | 30 × 30 (image mode); 150 × 150 (wide swath) | 35 |
ALOS-1 | 2006-2011 | 23.5 | 70 (Fine Beam Single); 350 (ScanSAR) | 10 (Fine Beam Single); 100 (ScanSAR) | 46 |
ALOS-2 | 2014- | 23.5 | 55 (Ultra Fine Beam Single); 490 (ScanSAR single) | 3 (Ultra Fine Beam Single); 60 (ScanSAR single) | 14 |
TerraSAR-X/TanDEM-X | 2008 – (TSX); 2010- (TDX) | 3.1 | 4 (Starting Spotlight); 30 (Stripmap); 270 (Wide ScanSAR) | 0.25 (Staring Spotlight); 3 (Stripmap); 40 (Wide ScanSAR) | 11 |
Sentinel-1a, b | 2014 – date (a), 2016- date (b) | 5.6 | 80 (Stripmap); 250 (interferometric wide swath); 400 (Extra wide swath) | 5 × 5 (Stripmap); 5 × 20 (interferometric wide swath); 25 × 100 (extra wide swath) | 12 (6 with 1b) |
COSMO-SkyMed 1,2,3,4 | Constellation staggered launches between 2007 and 2010, active to present. | 3.1 | 10 (Spotlight-2); 40 (Stripmap); 100 (ScanSAR) | 1 (Spotlight-2); 3-5 (Stripmap); 30 (ScanSAR) | 16 (≥ 1 for full constellation) |