The TROPOMI instrument onboard Sentinel-5 Precursor is a nadir-viewing, imaging spectrometer covering wavelength bands between the ultraviolet and the shortwave infrared. 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 Earth.

TROPOMI utilises a single telescope to form an image of the target area onto a rectangular slit that acts as the entrance slit of the spectrometer system. There are four different spectrometers, each with its own optics and detector: mediumwave ultraviolet (UV), longwave ultraviolet combined with visible (UVIS), near infrared (NIR), and shortwave infrared (SWIR). The spectrometers for UV, UVIS and NIR are jointly referred to as UVN. Radiation for the SWIR spectrometer is transferred by an optical relay part in the UVN system from the telescope to an interface position (the pupil stop) for the SWIR spectrometer. This is done because of the more stringent thermal requirements on the SWIR part of the instrument.

Each of the detectors is divided in two halves, which yields a total of eight spectral bands.

There are two different types of L1b data products available to users:

• L1b radiance products, containing Earth radiance spectra. There is one L1b radiance product type for each spectral band (product identifiers L1B_RA_BD1 through L1B_RA_BD8). See https://doi.org/10.5270/S5P-kb39wni
• L1b irradiance products, containing solar irradiance spectra. There are two L1b irradiance products types. The first (product identifier L1B_IR_UVN) contains the solar irradiance spectra for the UVN bands (band 1 through band 6). The second (product identifier L1B_IR_SIR) contains the solar irradiance spectra for the SWIR bands (band 7 and band 8). This page refers to these.

Data Set Specifications V2

Data Set Specifications V1

Processing Level

Level 1

How to access this data

Accessible via the Copernicus Data Space Ecosystem.

Resources

Technical Documentation on TROPOMI Level 1B Products:

• PRF (Product Readme File): description of changes between different product versions and overall quality information
• ATBD Data Version 2 (Algorithm Theoretical Basis Document - detailed information on the retrieval algorithm of TROPOMI Aerosol Layer Height products)
• ATBD Data Version 1 (Algorithm Theoretical Basis Document - detailed information on the retrieval algorithm of TROPOMI Aerosol Layer Height products)
• IODS Data Version 2 (Input Output Data definition - description of the input and output data of the TROPOMI Aerosol Layer Height product processing).
• IODS Data Version 1 (Input Output Data definition - description of the input and output data of the TROPOMI Aerosol Layer Height product processing).
• MDS Dataset Version 2 - (Metadata Specification): contains the metadata specification of the TROPOMI Level-1B data products.
• MDS Dataset Version 1 - (Metadata Specification): contains the metadata specification of the TROPOMI Level-1B data products.

Technical Documentation on other TROPOMI Level 1B and L2 Products:

• Products and Algorithms

Other Copernicus Sentinel-5 Precursor/TROPOMI documents:

• S5P Document Library

Related Datasets

The Products and Algorithms page contains links to other Copernicus S5P/TROPOMI datasets (click on the corresponding product type).

Data Citation Guidelines V2

Users, who, in their research, use ESA Earth Observation data that have been assigned a DOI, are asked to use it when citing the data source in their publications:

Copernicus Sentinel-5P (processed by ESA), 2021, TROPOMI Level 1B Irradiance products. Version 02. European Space Agency. https://doi.org/10.5270/S5P-mhtbru8

Data Citation Guidelines V1

Users, who, in their research, use ESA Earth Observation data that have been assigned a DOI, are asked to use it when citing the data source in their publications:

Copernicus Sentinel-5P (processed by ESA), 2018, TROPOMI Level 1B Irradiance products. Version 01. European Space Agency.