The GOME-2 (Global Ozone Monitoring Experiment) are a series of three identical instruments operating from the MetOp platforms. The GOME-2 instrument is a 4 channel UV/Vis grating spectrometer observing the Earth's atmosphere in nadir viewing geometry. It covers the wavelength region of 240 - 790 nm at moderate spectral resolution of 0.2 - 0.4 nm and has a ground-pixel size of 80 x 40 km2 (240 x 40 km2 for the back scan) over most of the globe. With its large swath, near global coverage is achieved every day.
The GOME-2 is the successor of GOME but has better spatial resolution, global coverage and is expected to provide data for the next 15 years from three successive instruments. Based on the experience with the GOME instrument, a number of improvements have been implemented that reduce the polarisation dependency of the instrument and problems with the diffuser used for irradiance measurements and facilitate more accurate radiometric calibration.
The first GOME-2 was launched on MetOp into a sun synchronous polar orbit in October 2006, and spectra are available since January 2007. The second MetOp satellite was launched successfully in September 2012 and data from the GOME-2 instrument on that platform will become available in early 2013.
For reasons not yet fully understood, the first GOME-2 instrument suffers from unexpectedly rapid loss in throughput. This leads to increasing scatter of the results and also to drifts in the retrieved amounts of some minor species. Since 2010, throughput loss has slowed down very much and no further deterioration in signal has so far been observed. More details can be found on the following poster:
There also is a volcanic SO2 alert based on GOME-2 measurements which was developed for the SAVAA project.