OCO-2 Level 1B calibrated, geolocated calibration spectra, Retrospective Processing V11r (OCO2_L1B_Calibration) at GES DISC

Version 11r is the current version of the data set. Older versions will no longer be available and are superseded by Version 11r.

The Orbiting Carbon Observatory is the first NASA missiondesigned to collect space-based measurements of atmospheric carbon dioxidewith the precision, resolution, and coverage needed to characterize theprocesses 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 ofreflected sunlight in the near-infrared CO2 near 1.61 and 2.06 micrometers and inmolecular 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 tothe 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 OCO2_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.

Data and Resources

Field Value
accessLevel public
bureauCode {026:00}
catalog_@context https://project-open-data.cio.gov/v1.1/schema/catalog.jsonld
catalog_conformsTo https://project-open-data.cio.gov/v1.1/schema
catalog_describedBy https://project-open-data.cio.gov/v1.1/schema/catalog.json
identifier C2248663235-GES_DISC
issued 2019-06-27
landingPage https://cmr.earthdata.nasa.gov:443/search/concepts/C2248663235-GES_DISC.html
language {en-US}
metadata_type geospatial
modified 2025-03-31
old-spatial -180.0 -90.0 180.0 90.0
programCode {026:001}
publisher NASA/GSFC/SED/ESD/GCDC/GESDISC
resource-type Dataset
source_datajson_identifier true
source_hash 612b22f9301af6440391ec2c0c40a83a4415bf8f42e1301908b1aaec3a619051
source_schema_version 1.1
temporal 2014-09-06T00:00:00Z/2023-03-01T00:00:00Z
theme {OCO-2,geospatial}
Groups
  • AmeriGEOSS
  • National Provider
  • North America
Tags
  • AmeriGEO
  • AmeriGEOSS
  • CKAN
  • GEO
  • GEOSS
  • National
  • North America
  • United States
  • atmosphere
  • atmospheric-chemistry
  • earth-science
  • infrared-wavelengths
  • spectral-engineering
isopen False
license_id notspecified
license_title License not specified
maintainer KRISTAN MORGAN
maintainer_email kristan.l.morgan@nasa.gov
metadata_created 2025-09-25T00:51:39.793753
metadata_modified 2025-09-25T00:51:39.793763
notes Version 11r is the current version of the data set. Older versions will no longer be available and are superseded by Version 11r. The Orbiting Carbon Observatory is the first NASA missiondesigned to collect space-based measurements of atmospheric carbon dioxidewith the precision, resolution, and coverage needed to characterize theprocesses 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 ofreflected sunlight in the near-infrared CO2 near 1.61 and 2.06 micrometers and inmolecular 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 tothe 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 OCO2_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.
num_resources 15
num_tags 13
title OCO-2 Level 1B calibrated, geolocated calibration spectra, Retrospective Processing V11r (OCO2_L1B_Calibration) at GES DISC