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First full mosaics of Titan’s surface   This stereographic projection of DISR images from ESA’s Huygens probe combines 60 images in 31 triplets, projected from a height of 3000 metres above the black ‘lakebed’ surface. The bright area to the north (top of the image) and west is higher than the rest of the terrain, and covered in dark lines that appear to be drainage channels.
To construct this projection, the direction of every pixel in each of the three imagers was measured and expressed as a nadir and azimuth angle in a spherical co-ordinate system centred on the image. The images were then spliced together using one of several projection algorithms (in this case ‘stereographic’) to produce a full mosaic.  This gnomonic projection of DISR images from ESA’s Huygens probe combines 17 image triplets, projected from an altitude of 800 metres. The area covered is approximately 1300 metres across (north at the top of the image). The smallest visible objects visible are less than five metres across, and the dark channels are 30-40 metres wide.
To construct this projection, the direction of every pixel in each of the three imagers was measured and expressed as a nadir and azimuth angle in a spherical co-ordinate system centred on the image. The images were then spliced together using one of several projection algorithms (in this case ‘gnomonic’) to produce a full mosaic. Release date: 26 May 2005 |