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Algerian Sahara
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Rating: 4.50/5 (2 votes cast)
- Title Algerian Sahara
- Released 19/11/2010 11:33 am
- Copyright ESA
- Description
Envisat radar image of the Tanezrouft Basin in the Algerian Sahara. Radar images reveal surface roughness – the rougher the surface, the brighter it appears. Hence, darker areas represent softer rock with a sandy or small-stoned surface. This image was created by combining three Envisat radar passes (23 March 2009, 1 June 2009 and 14 September 2009) over the same area. The colours result from changes in the surface between acquisitions.
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