Antarctica, satellite image. This image uses data from four satellite systems. The natural colour of ice and bare rock surfaces comes from a mosaic of Landsat satellite images, with a colour boost from false-colour AVHRR (Advanced Very High Resolution Radiometer) imagery. MODIS (Moderate-resolution Imaging Spectroradiometer) imagery is used for high-resolution details. Finally, CZCS (Coastal Zone Color Scanner) imagery provides ocean colour based on chlorophyll concentration. The datasets used for this image were assembled for the International Polar Year (2007-2008).