Spinning Enhanced Visible and Infrared Imager
|Within Vocab||SeaVoX Device Catalogue|
|Definition||The Spinning Enhanced Visible and Infrared Imager (SEVIRI) is an optical imaging radiometer designed for cloud imaging and tracking, fog detection, measurement of the Earth-surface and cloud-top temperatures, and the tracking of ozone patterns. This enables analysis of the characteristics of atmospheric air masses to reconstruct a three-dimensional view of the atmosphere. The SEVIRI instrument is composed of a Telescope and Scan Assembly (TSA), a Focal Plane and Cooler Assembly (FPCA), and an Electronic Unit Assembly (EUA). SEVIRI has 12 channels; 8 in the infrared, 1 in the high resolution visible, 2 in the visible, and 1 in the near-infrared spectrums. The scanning mirror is used to move the instrument line-of-sight (LOS) in the south-north direction. The target radiance is collected by the telescope and focused onto the detectors. Channel separation is performed at telescope focal-plane level, by means of folding mirrors. A flip-flop type mechanism is periodically actuated to place the IR calibration reference source in the instrument’s field of view. The image data are directly transferred from the Main Detection Unit (MDU) to the onboard data-handling subsystem. The Functional Control Unit (FCU) controls the SEVIRI functions and provides the telemetry and telecommand interfaces with the satellite. SEVIRI has a spin rate of 100 rpm and a spectral range of 0.4-1.6 micrometres (visible and near-infrared) and 3.9-13.4 micrometres (infrared). The instrument has a spatial resolution of 1 km for the high-resolution visible channel, and 3 km for all other channels. http://www.esa.int/esapub/bulletin/bullet111/chapter4_bul111.pdf|
|Is Version Of||TOOL1049|
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