Data products

Total Ozone Column


Ozone (O3) is of crucial importance for the equilibrium of the Earth atmosphere. In the stratosphere, the ozone layer shields the biosphere from dangerous solar ultraviolet radiation. In the troposphere, it acts as an efficient cleansing agent, but at high concentration it also becomes harmful to the health of humans, animals, and vegetation. Ozone is also an important greenhouse-gas contributor to ongoing climate change. Since the discovery of the Antarctic ozone hole in the 1980s and the subsequent Montreal Protocol regulating the production of chlorine-containing ozone-depleting substances, ozone has been routinely monitored from the ground and from space.  Here below you can see an example of the Arctic ozone hole from 22 March 2020.

Data Product Version Summary (click the highlighted version number for latest PRF for the OFFL and NRTI data products).

Version number Version Effective Orbit Number and Date Summary of Changes


OFFL: orbit 19258, 2021-07-01
NRTI:  orbit 19308, 2021-07-05

Current version; updated L1b, see PRF


OFFL: orbit 16213, 2020-11-29
NRTI: orbit 16259, 2020-12-02



OFFL:  orbit 14239, 2020-07-13
NRTI: orbit 14285, 2020-07-16




Links to the Algorithm Theoretical Basis Document (ATBD), Product User Manual (PUM), and the Product Readme File (PRF) is provided here on the right under Documentation. Note: the NRTI version of this data product was publically released on 11 July 2018, the OFFL version released in October 2018, and both are available via the Copernicus Open Data Access Hub (see link on right).