OCO-2 Data Center

Level 2 Products

The OCO-2 L2 XCO2 Lite and SIF Lite products are posted on the GES DISC for global access.

The “retrospective” Lite products (L2 XCO2 Lite v11.2r and L2 SIF Lite v11r/v11.2r) are the reference records from OCO-2.

The OCO-2 project also now produces daily bias-corrected Level 2 forward stream XCO2 and SIF data products. These data products were developed for users who would like to use OCO-2 data within a week of the observations being taken. These are removed as the retrospective data products are made available.

Learn more about daily OCO-2 bias corrected forward stream products:

OCO-2 Level 2 bias-corrected XCO2 and other select fields from the full-physics retrieval, Forward processing V11.2 (OCO2_L2_Fwd_FP)

OCO-2 Level 2 bias-corrected solar-induced fluorescence and other select fields from the IMAP-DOAS algorithm aggregated as daily files, Forward processing V11.2 (OCO2_L2_Fwd_SIF)

These data have been produced by the OCO-2 project, and are provided freely to the public.

Helpful documentation to review before your start working with OCO-2 data are at OCO-2 Documents.

Level 2 Algorithm

OCO-2 L2 Full Physics Code was open sourced and lives on Github- OCO-2 L2 Full Physics Code and the User's Guide for it is available at Users Guide. Please note that Users of the code NEED the ABSCO tables, which are available on request (ABSCO Tables). To run the L2 code, users will need at least the L1B and Met products.

Higher Level Products

The OCO-2 mission provides the highest quality space-based XCO2 retrievals to date. However, the instrument data are characterized by large gaps in coverage due to OCO-2’s narrow 10-km ground track and an inability to see through clouds and thick aerosols. Global gridded Level 3 datasets have been produced using a data assimilation technique commonly referred to as state estimation within the geophysical literature. Data assimilation synthesizes simulations and observations, adjusting the state of atmospheric constituents like CO2 to reflect observed values, thus gap-filling observations when and where they are unavailable based on previous observations and short transport simulations by GEOS. Daily and monthly gridded Level 3 products (and documentation) can be accessed here: https://disc.gsfc.nasa.gov/datasets?keywords=l3co2

If you are interested in an OCO-2 L4 flux product, please visit: OCO-2 v10 MIP Flux Maps

Feedback and Acknowledgement

In order to improve our product and have continued support for this work, we need user feedback and user acknowledgement of data usage. Therefore, we request that when publishing using OCO-2 data, please acknowledge NASA and the OCO-2 project.

• Include OCO-2 as a keyword to facilitate subsequent searches of bibliographic databases if it is a significant part of the publication
• Include a bibliographic citation for OCO-2 data. The most relevant citations currently are O’Dell et al. [2018], Taylor et al. [2023] and Wunch et al. [2017].
• Include the following acknowledgements: “These data were produced by the OCO-2 project at the Jet Propulsion Laboratory, California Institute of Technology, and obtained from the OCO-2 data archive maintained at the NASA Goddard Earth Science Data and Information Services Center.”

We recommend sending courtesy copies of publications to the OCO-2 Project Scientist, Vivienne.H.Payne@jpl.nasa.gov, and Deputy Project Scientist, Abhishek.Chatterjee@jpl.nasa.gov

We are happy to hear your comments and questions – please email oco2_feedback@jpl.nasa.gov