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An impression of OMI flying over the earth globe. The spectrum of a ground pixel is projected on the wavelength dimension of the CCD (the columns). The cross-track ground pixels are projected on the swath dimension of the CCD (the rows). The forward speed of 7 km/sec and an exposure time of 2 seconds lead to a ground pixel size of 13 km in the flight direction. The viewing angle of 114 degrees leads to a swath width on the ground of 2600 km.
