DESCRIPTION

The TROPOMI/S5P cloud properties retrieval is based on the OCRA and ROCINN algorithms currently being used in the operational GOME and GOME-2 products. OCRA retrieves the cloud fraction using measurements in the UV/VIS spectral regions and ROCINN retrieves the cloud height (pressure) and optical thickness (albedo) using measurements in and around the oxygen A-band at 760 nm. For TROPOMI/S5P we use OCRA/ROCINN Version 3.0, which is based on a more realistic treatment of clouds as optically uniform layers of light-scattering particles. Additionally the cloud parameters are also provided for a cloud model which assumes the cloud to be a Lambertian reflecting boundary. The figures below illustrate the Cloud Fraction (top panel) and the Cloud Top Pressure (lower panel) as derived from TROPOMI data from 2 January 2018. 

 

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

Version number Version Effective Date Summary of Changes

1.01.06

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

Current version

1.01.05

NRTI: 2018-12-05 (orbit 05932 to 07631)
OFFL: 2018-11-28 (orbit 05833 to 07541)

 

1.01.02

NRTI: 2018-08-08 (orbits 04243 to 05929)
OFFL: 2018-08-01 (orbits 04147 to 05832)

 

 

USER DOCUMENTATION: ATBD, PUM, & README

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