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DISR's CCD detector DISR's Charged Coupled Device, or CCD detector, is 512 x 520 pixels in size, about one quarter of a Megapixel. Of that, half is reserved as a memory or storage section. The remaining 256x520-pixel area is partitioned among the three cameras (HRI, SLI, and MRI), the Solar Aureole, ULVS, and DLVS sub-instruments. Based on M.G. Tomasko et al., "The Descent Imager/Spectral Radiometer (DISR) Experiment on the Huygens Entry Probe of Titan," <i>Space Science Reviews</i> <b>104</b>: 469-551, 2002.