Global atmospheric monitoring with SCIAMACHY

Abstract SCIAMACHY (SCanning Imaging Absorption spectrometer for Atmospheric CHartographY) is a space based spectrometer designed to measure sunlight transmitted, reflected and scattered by the Earth atmosphere or surface. It is a contribution to the Envisat-1 satellite to be launched in late 1999. SCIAMACHY measurements will provide amounts and distribution of 0 3 , BrO, OCl0, ClO, S0 2 , H 2 CO, N0 2 , CO, CO 2 , CH 4 , H 2 O, N 2 0, pressure, temperature, aerosol, radiation, cloud cover and cloud top height from atmospheric measurements in nadir, limb and occultation geometry. By the combination of the near simultaneous limb and nadir observations SCIAMACHY is one of a limited number of instruments which is able to detect tropospheric column amounts of 0 3 , N0 2 , CO, CH 4 , H 2 O, N 2 0, S0 2 , H 2 CO, and BrO down to the planetary boundary layer under cloud free conditions.

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