In this image, forests appear as dark green, urban areas as bright green or yellow, water as dark blue and agriculture as orange or yellow. In addition to the results presented here, a variety of geological areas are under study. Groups have recently reported the generation of interferogrammes over forested areas in Scandinavia for the measurement of tree height and possibly biomass, and over ice in the Antarctic Ice shelf for the measurement of motion of large ice flows. ERS-2 in tandem as a single Interferometer. The ERS Tandem mission began in September 95 and will last for a period of 9 months.
Colour corresponds to the terrain height.
These are significant advantages when compared with the conventional techniques of aerial photography or space borne optical stereo photogrammetry. Interferogrammes of surface motion have also been produced for Anatrtic Ice Flows and some Glaciers. In addition, the use of phase coherence is emerging as promising tool for land surface classification and change detection. The ERS Tandem mission holds the prospect of many valuable results which are difficult to obtain using a single satellite in a repeat cycle.