Calibrated geo-located HIRS Channel 8 radiances. High radiance values are related to the red and the yellow coloured pixels, and low values are marked by magenta. HIRS channel 8 is a window channel with a maximum sensitivity of 11.1 microns. Hence, it provides information on the surface temperature, cloud top temperature when clouds are optically thick. Between 15°S and 30°S, the sharp radiance contrast between land and water surfaces is evident, whereas major parts of Patagonia are covered by clouds. The black stripes, which occur at regular intervals across the flight direction, mark the calibration lines. During this time, the instrument looks into space or at the internal warm target and so can not generate Earth-view data. Data recorded on 21 November 2006.