Naples (Italy)

The image on the left side is an intensity image acquired over the Naples area (I) by ERS-1 in August 1991. The image has been "stretched" in the horizontal direction in order to show a better perspective view.
In the center of this image one can clearly distinguish the volcano Vesuvius. Below Vesuvius is the bay of Naples, and below Naples are the Caldera features of the Phlagrean Fields stretching to the coast. In the image, the white areas correspond to urban centres, and dark lines to motorways.
The figure on the right side shows an interferogramme of the same location.
The height contours of the Vesuvius are particularly striking. Note that no phase differences are given over the sea as the phase between passes is totally decorrelated due to the motion of the sea surface.

(Rocca, POLIMI, Milano)

Keywords: ESA European Space Agency - Agence spatiale europeenne, observation de la terre, earth observation, satellite remote sensing, teledetection, geophysique, altimetrie, radar, chimique atmospherique, geophysics, altimetry, radar, atmospheric chemistry