20 December 1996 Ground segment for ERS-2 GOME sensor at the German D-PAF
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Abstract
The Global Ozone Monitoring Experiment (GOME) is a new atmospheric chemistry instrument on-board the ERS-2 satellite which was launched in April 1995. The GOME is designed to measure a range of atmospheric trace constituents, with particular emphasis on global ozone distributions. The ground segment for the GOME sensor is with the German Remote Sensing Data Centre (DFD). Raw GOME data are converted into 'calibrated radiances' during the Level 0 to 1 processing by applying a series of calibration algorithms using in-flight observations and pre-flight instrument calibration parameter. Total column abundances of ozone and other trace gases can be derived from the Level 1 Product, comprising the Earth-shine radiance and the extra- terrestrial Solar irradiance, by applying three designated algorithms in the Level 1 to 2 processing step. The Initial Cloud Fitting Algorithm (ICFA) uses the spectral features close to and within the)2 A-band around 760 nm to determine the fractional cloud cover of the pixel scene. The Differential Optical Absorption Spectroscopy technique is used for the slant columns densities are converted to vertical columns by division with an appropriate Air Mass Factor (AMF), derived from radiative transfer simulations. If clouds are detected by ICFA, an averaged AMF is calculated from the intensity-weighted AMFs to ground and to cloud top. SInce the end of July 1996 the GOME data processing at the DFD is performed operationally.
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Werner Thomas, Bernd Aberle, Wolfgang Balzer, Diego Loyola, Eberhard Mikusch, Thomas Ruppert, Cornelia Schmid, Sander Slijkhuis, Robert J. D. Spurr, Andreas Tuerk, Meinhard Wolfmueller, "Ground segment for ERS-2 GOME sensor at the German D-PAF", Proc. SPIE 2961, Satellite Remote Sensing and Modeling of Clouds and the Atmosphere, (20 December 1996); doi: 10.1117/12.262487; https://doi.org/10.1117/12.262487
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