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GOME (Global Ozone Monitoring Experiment)

The GOME instrument aboard ESA’s ERS-2 satellite measures upwelling radiance from the atmosphere and extraterrestrial solar irradiance. The amount and distribution of a variety of significant atmospheric trace constituents may be retrieved from these observations. It was designed and optimized primarily to measure the global ozone distribution, but also the amounts of the trace gases BrO, OCIO, H2O, HCHO and NO2 can be obtained.
The GOME instrument comprises a nadir-viewing spectrometer which observes simultaneously the entire spectral range between 240 and 793 nm at channel dependent spectral resolutions between 0.2 and 0.4 nm. From the spectral features of the trace gases, their vertical columns are retrieved. Because of its sun-synchronous polar orbit, GOME measurements in middle latitudes are always taken in the late morning local time. With its swath width of 960 km (single ground pixel size is 320 km across track and 40 km along track) GOME reaches full coverage at the mid-latitudes within 2-3 days.

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