MEdium Resolution Imaging Spectrometer (MERIS) is one of the main instruments on board the European Space Agency (ESA)`s Envisat platform. This instrument is composed of five cameras disposed side by side, each equipped with a pushbroom spectrometer. These spectrometers use two-dimensional CCDs. One of the sides of the detector is oriented perpen.... Found on http://en.wikipedia.org/wiki/MERIS