OCO-3 Level 1B calibrated, geolocated calibration spectra, Retrospective Processing V10r (OCO3_L1B_Calibration) at GES DISC

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 Older versions will no longer be available and are superseded by Version 10r.

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.

The OCO-3 incorporates three high-resolution spectrometers that make coincident measurements ofreflected 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. Their raw data numbers (DN) are delivered correlated in time to the Level 1B process as Level 1A products. Each band has 1016 spectralelements, although some are masked out in the L2 retrieval.

This L1B product results from calibration mode measurements (e.g., Lunar,Solar, Dark observations), and thus it differs from the OCO3_L1B_Science(L1bSc) product. The differences in the product formats are only in the geolocation information provided. Whereas the L1bSc products report geolocation data for each sounding, calibration products report the directionof the boresight vector.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.

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.

Data and Resources

Additional Info

Field Value
Maintainer JENNIFER WEI, PH. D
Last Updated March 31, 2025, 19:56 (UTC)
Created March 31, 2025, 19:56 (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-3 Science Team/Michael Gunson, Annmarie Eldering. 2021-07-29. OCO3_L1B_Calibration. Version 10r. OCO-3 Level 1B calibrated, geolocated calibration spectra, Retrospective Processing V10r. 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_L1B_Calibration_10r.html. Digital Science Data.
creator OCO-3 Science Team/Michael Gunson, Annmarie Eldering
data-presentation-form Digital Science Data
graphic-preview-file https://docserver.gesdisc.eosdis.nasa.gov/public/project/Images/OCO3.jpeg
harvest_object_id 4e38f337-2a49-4c7a-9cf4-0a1694022679
harvest_source_id 61638e72-b36c-4866-9d28-551a3062f158
harvest_source_title DNG Legacy Data
identifier C2074239090-GES_DISC
issued 2021-07-21
landingPage https://cmr.earthdata.nasa.gov:443/search/concepts/C2074239090-GES_DISC.html
language {en-US}
metadata_type geospatial
modified 2021-07-21
programCode {026:001}
publisher NASA/GSFC/SED/ESD/GCDC/GESDISC
release-place Greenbelt, MD, USA
resource-type Dataset
series-name OCO3_L1B_Calibration
source_datajson_identifier true
source_hash e8a6134d323c3590310e783f1af20a43e5762b0432fd529ac8b1499a70f0d913
source_schema_version 1.1
spatial -180.0 -53.0 180.0 53.0
temporal 2019-08-06T00:00:00Z/2023-02-28T00:00:00Z
theme {OCO-3,geospatial}