The Global Ozone Monitoring Experiment–2 (GOME-2) is used to get a detailed picture of the total atmospheric content of ozone and the vertical ozone profile in the atmosphere.
It also provides accurate information on the total column amount of nitrogen dioxide, sulphur dioxide, water vapour, oxygen/oxygen dimmer, bromine oxide and other trace gases, as well as aerosols.
What is GOME-2?
The Global Ozone Monitoring Experiment–2 (GOME-2) is an optical spectrometer, fed by a scan mirror which enables across-track scanning in nadir, as well as sideways viewing for polar coverage and instrument characterisation measurements using the Moon.
GOME-2 senses the Earth’s backscattered radiance and extraterrestrial solar irradiance, in the ultraviolet and visible part of the spectrum (240-790 nm), at a high spectral resolution, between 0.2–0.4 nm. 4096 spectral points from four detector channels are transferred per individual GOME-2 measurement.
The footprint size is 80 x 40 km for main channel data. The instrument also measures the state of linear polarisation of the backscattered earthshine radiances in two perpendicular directions.
The polarisation data is down-linked in 15 spectral bands covering the region from 312 to 800 nm for both polarisation directions with a footprint of 10 x 40 km.
The GOME-2 instrument is developed by Leonardo (formerly SELEX) in Florence, Italy, under a joint contract from EUMETSAT and ESA.
Using GOME-2 data
In this video, Federico Fierli, EUMETSAT Training Officer and Atmospheric Composition expert, explains how to create your own NO2 maps using data from the GOME-2.