The Baltic country of Estonia - with the political borders in white - is pictured in this mosaic of eight scans by Sentinel-1A's radar from October to December 2014.

The scans were recorded in 'dual polarisation' horizontal and vertical radar pulses, from which the artificial colour composite was generated.

The flat country has over 1500 islands and 1400 lakes, while forests cover about 40% of the land area.

The largest island, Saaremaa, can be seen on the left side of the image. Although not visible in this image, the island is the site of a group of meteorite craters that, at the time of impact an estimated 4000–7000 years ago, burned forests within a 6 km radius.

View the full resolution image.

Credit: Copernicus data / European Space Agency (ESA) 2014