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ESA's old EO missions perform sophisticated new tricks   An interferometric image of the Po river delta showing an area 96km x 112km generated from data acquired on 31 December 2008 by ESA's Envisat and ERS-2 satellites. The image is a three-colour composite of coherence (red), average backscattering (green) and backscatter change (blue). Courtesy Gamma Remote Sensing AG  Combined EO mission control room at ESOC Both tandem campaigns generated strong science results  An interferometric image of the Po river delta showing an area 96 km x 112 km generated from data acquired on 31 December 2008 by ESA's Envisat and ERS-2 satellites. Color indicates topographic phase with a color cycle corresponding to a phase cycle. Courtesy Gamma Remote Sensing AG  Comparison of Digital Elevation Models (DEMs) for a 50 km x 35 km area of the Po River Delta, Italy. The DEM shown in the left image was derived from highly accurate interferometric data gathered during tandem observations by ESA's ERS-2 and Envisat (7 Nov 2007). The image to the right shows the interpolated Shuttle Radar Topography Mission (SRTM) DEM heights over the same area using the identical very fine color scale. In the SRTM DEM (showing 3-arc-second resolution equivalent to approx. 90m resolution), areas with forest and buildings are shown in pink indicating heights equal to or larger than + 1m above sea level (masl). Courtesy Gamme Remote Sensing AG Release date: 29 April 2009 |