Sentinel-1A radar acquisition from 22 April 2014 showing Greece’s Attica region, with mountainous areas and the capital and largest city of Athens near the centre. In the water, different shades of blue indicate different types of sea surface, influenced by currents and waves. The image was acquired in ‘interferometric wide swath’ mode and with a dual polarisation in VV and VH. Colours were assigned to different types of radar polarisations.