OCO-3 Level 2 geolocated XCO2 retrieval results and algorithm diagnostic information, Forward Processing V10 (OCO3_L2_Diagnostic) at GES DISC

Version 10 is the current version of the data set. Older versions will no longer be available and are superseded by Version 10.

The Orbiting Carbon Observatory -3 (OCO-3) was deployed to the International Space Station in May, 2019. It is technically a single instrument, almost identical to OCO-2.

The Orbiting Carbon Observatory is the first NASA mission designed to collect space-based measurements of atmospheric carbon dioxide with the precision, resolution, and coverage needed to characterize the processes controlling its buildup in the atmosphere.

OCO-3 incorporates three high-resolution spectrometers that make coincident measurements of reflected sunlight in the near-infrared CO2 near 1.61 and 2.06 micrometers and in molecular oxygen (O2) A-Band at 0.76 micrometers. The three spectrometers have different characteristics and are calibrated independently.

Oxygen-A Band cloud screening algorithm is one of the primary cloud screening tools implemented in the operational OCO processing pipeline. The algorithm was introduced and applied to early GOSAT data with further analysis performed on OCO-2 simulations.

The OCO ABO2 algorithm employs a fast Bayesian retrieval to estimate surface pressure and surface albedo from high resolution spectra of the molecular oxygen (O2) A-band, near 0.765 µm. The radiative transfer forward model (FM) assumes a clear-sky condition, i.e. Rayleigh scattering only, such that differences between the modeled and measured radiances are apparent when the measurement scene contains cloud or aerosol.

Data and Resources

Additional Info

Field Value
Maintainer THOMAS HEARTY
Last Updated March 31, 2025, 15:34 (UTC)
Created March 31, 2025, 15:34 (UTC)
accessLevel public
bureauCode {026:00}
catalog_@context https://project-open-data.cio.gov/v1.1/schema/catalog.jsonld
catalog_@id https://data.nasa.gov/data.json
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citation OCO Science Team/Michael Gunson, Annmarie Eldering. 2021-06-10. OCO3_L2_Diagnostic. Version 10. OCO-3 Level 2 geolocated XCO2 retrieval results and algorithm diagnostic information, Forward Processing V10. Greenbelt, MD, USA. Archived by National Aeronautics and Space Administration, U.S. Government, Goddard Earth Sciences Data and Information Services Center (GES DISC). https://disc.gsfc.nasa.gov/datacollection/OCO3_L2_Diagnostic_10.html. Digital Science Data.
creator OCO Science Team/Michael Gunson, Annmarie Eldering
data-presentation-form Digital Science Data
graphic-preview-file https://docserver.gesdisc.eosdis.nasa.gov/public/project/OCO/OCO3_logo.jpg
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harvest_source_title DNG Legacy Data
identifier C2082387279-GES_DISC
issued 2021-05-31
landingPage https://cmr.earthdata.nasa.gov:443/search/concepts/C2082387279-GES_DISC.html
language {en-US}
metadata_type geospatial
modified 2021-05-31
programCode {026:001}
publisher NASA/GSFC/SED/ESD/GCDC/GESDISC
release-place Greenbelt, MD, USA
resource-type Dataset
series-name OCO3_L2_Diagnostic
source_datajson_identifier true
source_hash c133ef0eb97e493cf4baefc85f41c7770d18ff5fcd87303a99c3fe9f2cc20018
source_schema_version 1.1
spatial -180.0 -90.0 180.0 90.0
temporal 2019-08-06T00:00:00Z/2023-02-28T00:00:00Z
theme {OCO-3,geospatial}