Data products

Sulphur Dioxide


Sulphur dioxide (SO2) enters the Earth’s atmosphere through both natural and anthropogenic processes. It plays a role in chemistry on a local and global scale and its impact ranges from short term pollution to effects on climate. Only about 30% of the emitted SO2 comes from natural sources; the majority is of anthropogenic origin. SO2 emissions adversely affect human health and air quality. SO2 has an effect on climate through radiative forcing, via the formation of sulphate aerosols. Volcanic SO2 emissions can also pose a threat to aviation, along with volcanic ash. S5P/TROPOMI samples the Earth’s surface with a revisit time of one day with unprecedented spatial resolution of 3.5 x 7 km which allows the resolution of fine details including the detection of much smaller SO2 plumes. Here, below is an image of TROPOMI SO2 averaged over the six-month period of Nov 2017 - Jul 2018. Read more about TROPOMI SO2 via this link.

Data product version summary (click on the latest version number for current PRF). 

Version number Version Effective Date (orbit range) Summary of Changes


NRTI: 2019-04-30 (orbit 08000 to present)
OFFL: 2019-04-23 (orbit 07907 to present)

Current version


NRTI: 2019-04-04 (orbit 07632 to 07999)
OFFL: 2019-03-28 (orbit 07542 to 07906)



NRTI: 2018-12-05 (orbit 05932 to 07631)
OFFL: 2018-12-05 (orbit 05932 to 07541)




Links to the Algorithm Theoretical Basis Document (ATBD), the Product User Manual (PUM), and the Product Readme File (PRF) are located on the right of this page under Documentation. The NRTI data product was released in October 2018, the OFFL product released in December 2018, and now both are available on the Copernicus Open Data Access Hub (see link on the right).