Animation: Flying over Mars' north polar cap
The video shows the permanent ice cap at the Martian North Pole and the up to 100-kilometre wide and 500-kilometre long valley Chasma Boreale. The north polar cap has a diameter of approximately 1100 kilometres and stands up to three kilometres above the surrounding landscape. It is also known as the summer ice cap and mainly consists of water ice. The HRSC mosaic on which this video was based was compiled from 32 individual image strips (1154, 1177, 1219, 1291, 1394, 1745, 3663, 3681, 3685, 3695, 5483, 5775, 5784, 5796, 5808, 5810, 5818, 5824, 5827, 5838, 5853, 5864, 5867, 5900, 5904, 5963, 6007, 6229, 8042, 8080, 8153, 8160). The image position is located between 0 to 360 degrees east and around 78 to 90 degrees north. The colour mosaic was derived from the nadir channel perpendicular to the surface of Mars and the HRSC colour channels. The mosaic image was combined with topographic information from the Mars Orbiter Laser Altimeter (MOLA) experiment on board the NASA Mars Global Surveyor (MGS) spacecraft, resulting in a three-dimensional landscape. The global Mars view is based on the Viking MDIM 2.1 colour mosaic. Staff from the Planetary Sciences and Remote Sensing Division at Freie Universität Berlin used the image data to produce this animated overflight of the north polar cap. The systematic processing of the data was undertaken at the DLR Institute of Planetary Research in Berlin-Adlershof.