The S5P Level-2 methane product is dependent on having information on cloud occurrence at spatial resolution finer than that achievable from TROPOMI itself. This information is also useful for other purposes, including assessing the influence of cloud on other Level-2 products and issues related to spatial co-registration. A Level-2 auxiliary product was therefore developed to describe cloud in the TROPOMI field of view (FOV), using co-located observations of VIIRS (Visible Infra-red Imaging Radiometer Suite) on the U.S. S-NPP (Suomi - National Polar-orbiting Partnership). S5P flies in a so-called loose formation with the S-NPP with a temporal separation between them of less than 5 minutes.
The main information contained in the S5P-NPP product is:
- A statistical summary for each S5P FOV of the NPP-VIIRS L2 Cloud Mask (VCM).
- The mean and standard deviation of the sun-normalised radiance in a number of VIIRS moderate resolution bands.
This information is provided for three S5P spectral bands (to account for differences in spatial sampling).
More information and examples
- Product description
- Gallery
- Validation summary
- Publications
Dataset Specifications
Examples of filenames (a.k.a. granules):
S5P_OFFL_L2__NP_BD3_20260201T231910_20260202T010040_43039_03_020003_20260203T131345.nc S5P_OFFL_L2__NP_BD6_20260201T231910_20260202T010040_43039_03_020003_20260203T131345.nc S5P_OFFL_L2__NP_BD7_20220701T230527_20220702T004657_24439_02_010300_20220703T125153.nc |
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Elements in the filename separated by underscores after the initial "S5P": |
Dataset Specifications V2 | |
| Temporal Coverage |
Since 29-Nov-2023 |
| 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 |
3.5 x 7.0 km (across x along track), at beginning of mission 3.5 x 5.5 km (across x along track), since 6 August 2019 |
| Processor Version | 02.xx.xx, with x=any digit between 0 and 9 |
Dataset Specifications V1 | |
| Temporal Coverage |
From 04-May-2018 to 23-Nov-2023 |
| 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 |
3.5 x 7.0 km (across x along track), at beginning of mission 3.5 x 5.5 km (across x along track), since 6 August 2019 |
| Processor Version | 01.xx.xx, with x=any digit between 0 and 9 |
Processing Level
Level-2 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 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 V2 |
| Copernicus Sentinel-5P (processed by ESA), 2023, S5P-NPP Level 2 Cloud products. Version 02. European Space Agency. https://doi.org/10.5270/S5P-c8b3899 |
Dataset Citation Guidelines V1 |
| Copernicus Sentinel-5P (processed by ESA), 2019, S5P-NPP Level 2 Cloud products. Version 01. European Space Agency. https://doi.org/10.5270/S5P-91oxxtk |