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.
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). Radiances are measured on the dayside along every orbit. This page refers to the radiance products. - L1B irradiance products, containing solar irradiance spectra.
There are two L1b irradiance product 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). Irradiances are measured once every 15 orbits. See the irradiance product page.
Spectrometer |
UV |
VIS |
NIR |
SWIR | ||||
| Band ID | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 |
| Spectral range [nm] | 267-300 | 300-332 | 305-400 | 400-499 | 661-725 | 725-786 | 2300-2343 | 2343-2389 |
| Spectral resolution [nm] | 0.45 - 0.50 | 0.45 - 0.65 | 0.34 - 0.35 | 0.227 | 0.094 | |||
| Spectral sampling [nm] | 0.065 | 0.195 | 0.195 | 0.094 | ||||
| Spatial sampling at nadir [km2] * | 5.5 x 28 | 5.5 x 3.5 | 5.5 x 3.5 | 5.5 x 3.5 | 5.5 x 7.0 | |||
| Detector binning factor | 16 | 2 | 2 | 2 | 2 | 2 | 1 | 1 |
| Minimal signal-to-noise ratio | 50 ** | 50-600 ** | 100-1200 ** | 1200 ** | 500 ** | 200-600 ** | 100-120 *** | |
| *) Along x across track, since the along-track pixel size reduction from 7.0 to 5.5 km on 6 August 2019 **) Based on simulations for low albedo mid-latitude radiance ***) Based on design values | ||||||||
More information and examples
- Product description
- Gallery
- Validation summary
- Publications
Dataset Specifications
Examples of filenames (a.k.a. granules):
S5P_OFFL_L1B_RA_BD4_20260201T231910_20260202T010040_43039_03_030000_20260202T025133.nc S5P_NRTI_L1B_RA_BD4_20260201T233807_20260201T234319_43039_03_030000_20260202T004219.nc S5P_RPRO_L1B_RA_BD4_20220701T230527_20220702T004657_24439_03_020100_20230104T141230.nc |
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Elements in the filename separated by underscores after the initial "S5P": |
Dataset Specifications V3 | |
| Temporal Coverage |
Since 27-Nov-2025 |
| Spatial Coverage |
~2600 km swath Full daily surface coverage of radiance and reflectance measurements for latitudes > 7° and < -7°, and better than 95 % coverage for latitudes in the interval [-7°, 7°] |
| Spatial Resolution at Nadir | See table "TROPOMI spectral bands" above |
| Processor Version | 03.xx.xx, with x=any digit between 0 and 9 |
Dataset Specifications V2 | |
| Temporal Coverage |
From 01-Jul-2021 to 27-Nov-2025 |
| Spatial Coverage |
~2600 km swath Full daily surface coverage of radiance and reflectance measurements for latitudes > 7° and < -7°, and better than 95 % coverage for latitudes in the interval [-7°, 7°] |
| Spatial Resolution at Nadir | See table "TROPOMI spectral bands" above |
| Processor Version | 02.xx.xx, with x=any digit between 0 and 9 |
Dataset Specifications V1 | |
| Temporal Coverage |
From 30-Apr-2018 to 01-Jul-2021 |
| Spatial Coverage |
~2600 km swath Full daily surface coverage of radiance and reflectance measurements for latitudes > 7° and < -7°, and better than 95 % coverage for latitudes in the interval [-7°, 7°] |
| Spatial Resolution at Nadir | See table "TROPOMI spectral bands" above |
| Processor Version | 01.xx.xx, with x=any digit between 0 and 9 |
Processing Level
Level-1B processing of S5P/TROPOMI data.
How to Access the Data
The data related to this product and to the other S5P/TROPOMI products are accessible via the Copernicus Data Space Ecosystem (CDSE).
Documentation & Related Datasets
Technical documentation on the S5P/TROPOMI Level-1B and Level-2 products can be found on the SentiWiki S5P Products page.
Dataset Citation Guidelines
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:
Dataset Citation Guidelines V3 |
| Copernicus Sentinel-5P (processed by ESA), 2025, TROPOMI Level 1B Radiance products. Version 03. European Space Agency. https://doi.org/10.57780/S5P-bf9cd6d |
Dataset Citation Guidelines V2 |
| Copernicus Sentinel-5P (processed by ESA), 2021, TROPOMI Level 1B Radiance products. Version 02. European Space Agency. https://doi.org/10.5270/S5P-kb39wni |
Dataset Citation Guidelines V1 |
| Copernicus Sentinel-5P (processed by ESA), 2018, TROPOMI Level 1B Radiance products. Version 01. European Space Agency. |