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Envisat 
Ganges' dazzling delta 
2009 (combined data) 
  
ASAR - Advanced Synthetic Aperture Radar 
ESA - European Space Agency 
ESA, ID number: SEM03ME3GXF 
  
 
LL/37422 
  
This Envisat image highlights the Ganges Delta, the world's largest delta, in the south Asia area of Bangladesh (visible) and India. The delta plain, about 350-km wide along the Bay of Bengal, is formed by the confluence of the rivers Ganges, the Brahmaputra and Meghna.
 
As radar images represent surface backscatter rather than reflected light, there is no colour in a standard radar image. This image was created by combining three Envisat Advanced Synthetic Aperture Radar acquisitions (20 January 2009, 24 February 2009 and 31 March 2009) taken over the same area. The colours in the image result from variations in the surface that occurred between acquisitions. 
 

 
  
 
  
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