OCO-2 Level 2 geolocated XCO2 retrievals results, physical model, Retrospective Processing V10r (OCO2_L2_Standard) at GES DISC

Description

Version 10r is the current version of the data set. Older versions will no longer be available and are superseded by Version 10r. In early 2021, the OCO Team identified an issue with OCO-2 level 2 products processed since January 28, 2020. The Ancillary Geometric Product (AGAP) file, a static file used in OCO-2 Geolocation processing, was inadvertently replaced with an obsolete version. This AGAP file included a ~300 m pointing error. As a result, all OCO-2 Level 2, version 10r, data files for the period January 28 - December 31, 2020, were corrected and replaced. The replacement process was completed by the end of June, 2021. The significance of this error has been described in Kiel et al. (2019; doi:10.5194/amt-12-2241-2019). 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. The OCO-2 project uses the LEOStar-2 spacecraft that carries a single instrument. It 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. This collection is the output from the algorithm retrieving the column-averaged CO2 dry air mole fraction XCO2 and other quantities from the spectra collected by the Orbiting Carbon Observatory-2 (OCO-2). This is the retrospective processing where the calibration data is estimated from the full timeseries of data (before, during, and after the measurements), and is expected to be of slightly higher quality.

Resources

Name Format Description Link
34 OCO2_L2_Std_10r_Sep2021.png https://docserver.gesdisc.eosdis.nasa.gov/public/project/OCO/OCO2_L2_Std_10r_Sep2021.png
21 Search results for publications that cite this dataset by its DOI. https://scholar.google.com/scholar?q=10.5067%2F6SBROTA57TFH
21 Access the data via HTTP https://oco2.gesdisc.eosdis.nasa.gov/data/OCO2_DATA/OCO2_L2_Standard.10r/
33 README document https://docserver.gesdisc.eosdis.nasa.gov/public/project/OCO/README.OCO2.pdf
33 USER'S GUIDE https://docserver.gesdisc.eosdis.nasa.gov/public/project/OCO/OCO2_OCO3_B10_DUG.pdf
33 OCO_L2_ATBD.pdf https://docserver.gesdisc.eosdis.nasa.gov/public/project/OCO/OCO_L2_ATBD.pdf
33 Software Interface Specification https://docserver.gesdisc.eosdis.nasa.gov/public/project/OCO/SDOS_SIS_L2Standard.V7.pdf
21 Access the dataset landing page from the GES DISC website. https://disc.gsfc.nasa.gov/datacollection/OCO2_L2_Standard_10r.html
21 OCO-2 Project Home Page https://ocov2.jpl.nasa.gov/
21 Use the Earthdata Search to find and retrieve data sets across multiple data centers. https://search.earthdata.nasa.gov/search?q=OCO2_L2_Standard
21 OCO-2 Documentation https://disc.gsfc.nasa.gov/information/documents?title=OCO-2+Documents
21 This software (NASA NTR-49044) retrieves a set of atmospheric/surface/instrument parameters from a simultaneous fit to spectra from multiple absorption bands. The software uses an iterative, non-linear retrieval technique (optimal estimation). After the retrieval process has converged, the software performs an error analysis. The products of the software include all quantities needed to understand the information content of the measurement, its uncertainty, and its dependence on interfering atmospheric properties. Jet Propulsion Laboratory, California Institute of Technology. Copyright 2016 California Institute of Technology. U.S. Government sponsorship acknowledged. https://github.com/nasa/RtRetrievalFramework
21 Access the data via the OPeNDAP protocol. https://oco2.gesdisc.eosdis.nasa.gov/opendap/OCO2_L2_Standard.10r/contents.html
21 Publications from the Science Team https://ocov2.jpl.nasa.gov/science/publications/
21 OCO-2 Data Gaps https://disc.gsfc.nasa.gov/information/documents?title=OCO+Known+Data+Issues

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  • atmosphere
  • atmospheric-chemistry
  • earth-science

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