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Description

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 Older versions will no longer be available and are superseded by Version 11r.

The OCO-2 SIF Lite files contain bias-corrected solar induced chlorophyll fluorescence along with other select fields aggregated as daily files.

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 encompass the output from the IMAP-DOAS preprocessor, which is used for both screening of the official XCO2 product as well as for the retrieval of Solar-Induced Fluorescence from the 0.76 micrometer O2 A-band. The IMAP-DOAS preprocessor, just as the ABO2 cloud screen, is implemented in the operational OCO-2 processing pipeline.

Product Summary

Platforms
OCO-2
Instruments
OCO-2
Spatial Extent

N: 90 S: -90 E: 180 W: -180

Location
GLOBAL
Coordinate System
CARTESIAN
Granule Spatial Representation
CARTESIAN
Temporal Extent
2014-09-01 to 2024-03-31
Data Partner
Goddard Earth Sciences Data and Information Services Center (formerly Goddard DAAC), Terrestrial Information Systems Laboratory, Earth Sciences Division, Science and Exploration Directorate, Goddard Space Flight Center, NASA (NASA/GSFC/SED/ESD/TISL/GESDI
Concept ID
C2248652649-GES_DISC
Data State
COMPLETE
Number of Files/Granules
3274
Processing Level
2
Published
Updated
Science Keywords
Atmospheric Carbon Dioxide ,
Solar Induced Fluorescence

Citation

Citation is critically important for dataset documentation and discovery. This dataset is openly shared, without restriction, in accordance with the EOSDIS Data Use and Citation Guidance.

Copy Citation

Science Computing Facility, J. P. L. (2017). OCO-2 Level 2 bias-corrected solar-induced fluorescence and other select fields from the IMAP-DOAS algorithm aggregated as daily files, Retrospective processing V11r [Data set]. NASA Goddard Earth Sciences Data and Information Services Center. https://doi.org/10.5067/OTRE7KQS8AU8 Date Accessed: 2026-05-13

Documents

USER'S GUIDE

READ-ME

ALGORITHM THEORETICAL BASIS DOCUMENT (ATBD)

GENERAL DOCUMENTATION

Variables

The table below lists the variables contained within a single granule for this dataset. Variables often contain observed or derived geophysical measurements collected from a variety of sources, including remote sensing instruments on satellite and airborne platforms, field campaigns, in situ measurements, and model outputs. The terms variable, parameter, scientific data set, layer, and band have been used across NASA’s Earth science disciplines; however, variable is the designated nomenclature in NASA’s Common Metadata Repository (CMR). Variable metadata attributes such as Name, Description, Units, Data Type, Fill Value, Valid Range, and Scale Factor allow users to efficiently process and analyze the data. The full range of attributes may not be applicable to all variables. Additional information on variable attributes is typically available in the data, user guide, and/or other product documentation.

For questions on a specific variable, please use the Earthdata Forum.

Name Description Units Data Type Fill Value Valid Range Scale Factor Offset
Science/continuum_radiance_757nm Continuum Level Radiance at 757 nm W/m^2/sr/µm float32 N/A -1.0000000150475E+30 to 1.0000000150475E+30 1 0
Science/continuum_radiance_771nm Continuum Level Radiance at 771 nm W/m^2/sr/µm float32 N/A -1.0000000150475E+30 to 1.0000000150475E+30 1 0
Science/daily_correction_factor Correction factor to estimate daily average SIF from instantaenous SIF (using pure geometric incoming light scaling) N/A float32 N/A -1.0000000150475E+30 to 1.0000000150475E+30 1 0
Science/IGBP_index One-Minute Land Ecosystem Classification Product is a global (static map) data set of the International Geosphere-Biosphere Programme (IGBP) classification scheme stored on an equal-angle rectangular grid at 1-minute resolution. See http://modis-atmos.gsfc.nasa.gov/ECOSYSTEM/ N/A int16 N/A 0 to 18 1 0
Science/SIF_757nm Offset-Adjusted Solar Induced Chlorophyll Fluorescence at 757nm W/m^2/sr/µm float32 N/A -1.0000000150475E+30 to 1.0000000150475E+30 1 0
Science/SIF_771nm Offset-Adjusted Solar Induced Chlorophyll Fluorescence at 771nm W/m^2/sr/µm float32 N/A -1.0000000150475E+30 to 1.0000000150475E+30 1 0
Science/SIF_Relative_757nm Offset-Adjusted Solar Induced Chlorophyll Fluorescence at 757nm in fractions of continuum level N/A float32 N/A -1.0000000150475E+30 to 1.0000000150475E+30 1 0
Science/SIF_Relative_771nm Offset-Adjusted Solar Induced Chlorophyll Fluorescence at 771nm in fractions of continuum level N/A float32 N/A -1.0000000150475E+30 to 1.0000000150475E+30 1 0
Science/SIF_Unadjusted_757nm Solar Induced Chlorophyll Fluorescence at 757nm, no offset adjustment W/m^2/sr/µm float32 N/A -1.0000000150475E+30 to 1.0000000150475E+30 1 0
Science/SIF_Unadjusted_771nm Solar Induced Chlorophyll Fluorescence at 771nm, no offset adjustment W/m^2/sr/µm float32 N/A -1.0000000150475E+30 to 1.0000000150475E+30 1 0
Science/SIF_Unadjusted_Relative_757nm Solar Induced Chlorophyll Fluorescence at 757nm in fractions of continuum level, no offset adjustment N/A float32 N/A -1.0000000150475E+30 to 1.0000000150475E+30 1 0
Science/SIF_Unadjusted_Relative_771nm Solar induced chlorophyll fluorescence at 771nm in fractions of continuum level, no offset adjustment N/A float32 N/A -1.0000000150475E+30 to 1.0000000150475E+30 1 0
Science/SIF_Uncertainty_757nm One-Sigma Statistical Uncertainty in Solar Induced Chlorophyll Fluorescence at 757nm W/m^2/sr/µm float32 N/A -1.0000000150475E+30 to 1.0000000150475E+30 1 0
Science/SIF_Uncertainty_771nm One-Sigma Statistical Uncertainty in Solar Induced Chlorophyll Fluorescence at 771nm W/m^2/sr/µm float32 N/A -1.0000000150475E+30 to 1.0000000150475E+30 1 0
Science/sounding_land_fraction Percentage of land surface type within the sounding per cent float32 N/A 0 to 100 1 0
Science/sounding_qual_flag Sounding Quality Flag: 0 = good, 1 = bad N/A int16 N/A 0 to 1 1 0
Sequences/SegmentsIndex Index of segment in sequences for current sounding; zero-based; -1 == no segment N/A int16 N/A 0 to 127 1 0
Sequences/SequencesId IDs of special sequences (OCO-3 only, unavailable for OCO-2), in the order of their observation; multiple entries of the same sequence are possible N/A string N/A N/A N/A N/A
Sequences/SequencesIndex Index entry for current sounding in SequenceNames list; zero-based; -1 == no sequence N/A int16 N/A 0 to 9999 1 0
Sequences/SequencesMode Type of SAM/Target sequence observation: TG = Target, AM = Snapshot Area Mode (SAM; OCO-3 only) N/A string N/A N/A N/A N/A
Sequences/SequencesName Names of special sequences (OCO-3: SAM&Target, OCO-2: Target only), in the order of their observation; multiple entries of the same sequence are possible N/A string N/A N/A N/A N/A
SIF_740nm Solar induced chlorophyll fluorescence at retrieved wavelength: SIF_740nm = 0.75 * (/Science/sif_757nm + 1.5*/Science/sif_771nm) W/m^2/sr/µm float32 N/A -1.0000000150475E+30 to 1.0000000150475E+30 1 0
SIF_Uncertainty_740nm Uncertainty computed from continuum level radiance at 740 nm: SIF_Uncertainty_740 = 0.75 * ( (/Science/sif_757nm)^2 + (1.5*/Science/sif_771nm)^2 )^(1/2) W/m^2/sr/µm float32 N/A -1.0000000150475E+30 to 1.0000000150475E+30 1 0
SZA Solar zenith angle is the angle between the line of sight to the sun and the local vertical degrees float32 N/A 0 to 90 1 0
VAz Azimuth angle between line of sight and local north degrees float32 N/A 0 to 360 1 0
VZA Sensor zenith angle is the angle between the line of sight to the sensor and the local vertical degrees float32 N/A 0 to 90 1 0
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