The TROPOMI instrument is a space-borne, nadir-viewing, imaging spectrometer covering wavelength bands between the ultraviolet and the shortwave infra-red. TROPOMI is the single payload of the SENTINEL-5P spacecraft, the purpose of which is
to measure atmospheric properties and constituents. The instrument uses passive remote sensing techniques to attain its objective by measuring at the Top Of Atmosphere (TOA) the solar radiation reflected by and radiated from the earth. The four
spectrometers of TROPOMI cover the ultraviolet (UV), visible (VIS), Near Infra-Red (NIR) and Short Wavelength Infra-Red (SWIR) domains of the electromagnetic spectrum, allowing operational retrieval of the following trace gas constituents: Ozone
(O3), Nitrogen Dioxide (NO2), Sulfur Dioxide (SO2), Formaldehyde (HCHO), Carbon Monoxide (CO) and Methane (CH4).