![](\"http:\/\/www.esa.int\/var\/esa\/storage\/images\/esa_multimedia\/images\/2017\/09\/rover_craters\/17162475-1-eng-GB\/Rover_craters_small.jpg\")
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\nIn the week of 18 September 2017, the low-resolution webcam on ESA\u2019s Mars Express captured some impressive images from between 3000 km to 5000 km altitude.\n<\/p>\n
\nThe image series is being used to calibrate the camera now that it has been promoted to a \u2018full\u2019 science instrument (Mars webcam goes pro<\/a>).\n<\/p>\n \nThis week, the images provided reasonably good definition for many craters on the surface, including several that are occupied by NASA rovers.\n<\/p>\n \nIn the composite image above, moving from lower left to upper right, three craters are circled.\n<\/p>\n \nThe first shows Gale crater, which is occupied by NASA\u2019s Curiosity rover. The second circle, to the right in the middle, shows Gusev Crater, home of the retired Spirit rover. The last circle, at top right of the middle image, also indicates the location of Gale crater and Curiosity.\n<\/p>\n \nIn addition to studies into Mars\u2019 atmosphere, clouds, dust and atmospheric structures and for tracking variations in the polar ice cap, all of the webcam images are published in a public gallery in Flickr<\/a>, and are automatically posted via Twitter<\/a>, sometimes within a couple hours of acquisition at Mars.\n<\/p>\n \nMore information via ESA\u2019s webcam blog<\/a>.\n<\/p>\n