This information has been provided by Radarsat, a Canadian satellite capable of detecting detailed water and land features through thickclouds, fog and rain using synthetic-aperture radar equipment.
Depending on the capricious whims of the extreme Arctic climate and calendar, thickclouds reveal remote fragments of the landscape as if concealing some great mystery, blinding sunshine illuminates the ice, or perpetual moonlight bathes it all in the strange, blue half-light of the polar night.