Sentinel-1 captures Mato Grosso

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#Forêts , #Agriculture , #Image in the news

Publié le 6 décembre 2019

The Copernicus Sentinel-1 mission takes us over part of the Brazilian state of Mato Grosso deep in the Amazon interior.

The image below combines three separate radar images from the Copernicus Sentinel-1 mission taken about two years apart to show change in crops and land cover over time.

Unlike images from satellites carrying optical or ‘camera-like’ instruments, images acquired  with imaging radar are interpreted by studying the intensity of the backscatter radar signal, which is related to the roughness of the ground.

Here, the first image, from 2 May 2015, is picked out in blue; the second, from 16 March 2017, picks out changes in green; and the third from 18 March 2019 in red; areas in grey depict little or no change between 2015 and 2019.

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