Array · collection · 2024
PACE OCI Level-3 Global Mapped Ocean Color Inherent Optical Properties (OC_IOP) - Near Real-time (NRT) Data, version 3.2
Listed in NASA Earthdata CMR
The Ocean Biology DAAC produces near real-time (NRT) products using the best-available combination of ancillary data from meteorological and ozone data.
Description
As such, the inputs and the calibration used are less than optimal. Near real-time products provide a snapshot of the data during a short time period within a single orbit.
The Inherent Optical Properties (IOP) suite provides per-pixel inherent optical properties - quantities that describe how seawater and its constituents absorb and scatter light, independent of illumination or viewing geometry. IOPs are retrieved from spectral Remote Sensing Reflectance (Rrs) using the default configuration of the Generalized Inherent Optical Properties (GIOP) model framework. These products support water-type classification, water-clarity assessment, biogeochemical studies, and forward/adjoint radiative-transfer applications, and they enable more robust cross-sensor comparisons than purely apparent (AOP) products.
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The hyperspctral band list is found in the science data file metadata. Geophysical variables in this suite include: - Kd - Diffuse attenuation coefficient of downwelling irradiance (m^-1) - a - Total absorption coefficient (sum of pure water + phytoplankton + CDOM/detritus, m^-1) - bb - Total backscattering coefficient (m^-1) - aph - Phytoplankton absorption coefficient (m^-1) - aph_unc_442 - Uncertainty in absorption due to phytoplankton at 442 nm (m^-1) - adg_442 - Combined CDOM + non-algal detritus absorption coefficient at 442nm (m^-1) - adg_unc_442 - Uncertainty in absorption due to gelbstoff and detrital material at 442 nm (m^-1) - bbp_442 - Particulate backscattering coefficient at 442nm (m^-1) - bbp_unc_442 - Uncertainty in particulate backscattering at 442 nm (m^-1) - rrsdiff - Fractional mean Rrs difference (reconstructed from inverted IOPs - input) (unitless)
Links
Get the data
Documentation and papers
- PACE Homepage earthdata.nasa.gov/data/platforms/space-based-platforms/PACE ↗
documentation · from NASA CMR
- OCI Homepage earthdata.nasa.gov/data/instruments/OCI ↗
documentation · from NASA CMR
- nasa.github.io /oceandata-notebooks ↗
Satellite data procesing can be difficult. We're here to help! Visit the Oceandata Help Hub to navigate learning content for accessing visualizing, and analyzing data products.
documentation · from NASA CMR
- Data structure file for processing level L3 oceandata.sci.gsfc.nasa.gov/images/data/pace/txt/OCI_Level-3m_IOP_aph_Data_Structure.txt ↗
documentation · from NASA CMR
- Data structure file for processing level L3 oceandata.sci.gsfc.nasa.gov/images/data/pace/txt/OCI_Level-3m_IOP_adg_s_Data_Structure.txt ↗
documentation · from NASA CMR
- Data structure file for processing level L3 oceandata.sci.gsfc.nasa.gov/images/data/pace/txt/OCI_Level-3m_IOP_adg_442_Data_Structure.t… ↗
documentation · from NASA CMR
- Data structure file for processing level L3 oceandata.sci.gsfc.nasa.gov/images/data/pace/txt/OCI_Level-3m_IOP_a_Data_Structure.txt ↗
documentation · from NASA CMR
- Data structure file for processing level L3 oceandata.sci.gsfc.nasa.gov/images/data/pace/txt/OCI_Level-3m_IOP_bb_Data_Structure.txt ↗
documentation · from NASA CMR
- Data structure file for processing level L3 oceandata.sci.gsfc.nasa.gov/images/data/pace/txt/OCI_Level-3m_IOP_bbp_442_Data_Structure.t… ↗
documentation · from NASA CMR
- Data structure file for processing level L3 oceandata.sci.gsfc.nasa.gov/images/data/pace/txt/OCI_Level-3m_IOP_bbp_s_Data_Structure.txt ↗
documentation · from NASA CMR
- Sample data file for processing level L3 oceandata.sci.gsfc.nasa.gov/images/data/pace/sample_data/PACE_OCI.20250101.L3m.DAY.IOP.V3_… ↗
documentation · from NASA CMR
- Sample data file for processing level L3 oceandata.sci.gsfc.nasa.gov/images/data/pace/sample_data/PACE_OCI.20250101.L3m.DAY.IOP.V3_… ↗
documentation · from NASA CMR
- Sample data file for processing level L3 oceandata.sci.gsfc.nasa.gov/images/data/pace/sample_data/PACE_OCI.20250101.L3m.DAY.IOP.V3_… ↗
documentation · from NASA CMR
- Sample data file for processing level L3 oceandata.sci.gsfc.nasa.gov/images/data/pace/sample_data/PACE_OCI.20250101.L3m.DAY.IOP.V3_… ↗
documentation · from NASA CMR
- Sample data file for processing level L3 oceandata.sci.gsfc.nasa.gov/images/data/pace/sample_data/PACE_OCI.20250101.L3m.DAY.IOP.V3_… ↗
documentation · from NASA CMR
- Sample data file for processing level L3 oceandata.sci.gsfc.nasa.gov/images/data/pace/sample_data/PACE_OCI.20250101.L3m.DAY.IOP.V3_… ↗
documentation · from NASA CMR
- Sample data file for processing level L3 oceandata.sci.gsfc.nasa.gov/images/data/pace/sample_data/PACE_OCI.20250101.L3m.DAY.IOP.V3_… ↗
documentation · from NASA CMR
- oceandata.sci.gsfc.nasa.gov /files/atbd/atbd-obdaac-inherent-optical-properties.pdf ↗
ATBD for Ocean Color Inherent Optical Properties (OC_IOP) - Near Real-time (NRT)
documentation · from NASA CMR
- Product Release Notes for PACE OCI, Version 3 oceandata.sci.gsfc.nasa.gov/files/reprocessing/PACE_OCI_V3_Release_Notes.pdf ↗
documentation · from NASA CMR
- Product Release Notes for PACE OCI, Version 2 oceandata.sci.gsfc.nasa.gov/files/reprocessing/PACE_Science_Data_V2_Release_Notes.pdf ↗
documentation · from NASA CMR
- Product Release Notes for PACE OCI, Version 1 oceandata.sci.gsfc.nasa.gov/files/reprocessing/PACE_Science_Data_V1_Release_Notes.pdf ↗
documentation · from NASA CMR
Catalogue records · 3
- CMR record cmr.earthdata.nasa.gov/search/concepts/C4124889442-OB_CLOUD.html ↗
catalogue entry · from NASA CMR
- oceandata.sci.gsfc.nasa.gov /opendap/PACE_OCI/L3SMI ↗
OPeNDAP Site for PACE OCI Standard Mapped Image (SMI) Product
metadata API · from NASA CMR
- CMR UMM-JSON cmr.earthdata.nasa.gov/search/concepts/C4124889442-OB_CLOUD.umm_json ↗
metadata API · from NASA CMR
Topics
- Stated by source
- Absorption · Attenuation/Transmission · Gelbstoff · Light Transmission · Ocean Color Instrument · Organic Matter · Phytoplankton · Plankton, Aerosol, Cloud, ocean Ecosystem mission · Reflectance · Scattering · Surface Water · Water Quality
- Inferred from text
- Oceanography 73% · Satellite remote sensing 65%
Provenance · 1 source records, 23 field assertions
| Source | Key | Last seen | Raw |
|---|---|---|---|
| NASA Earthdata CMR | C4124889442-OB_CLOUD | 12 d ago | JSON v1 |
| Field | Assertion | Extractor | Evidence |
|---|---|---|---|
| access_level | source · NASA CMR | connector:nasa_cmr@1.0.0 | |
| concepts[field].anzsrc:group:3708 | enrichment · NASA CMR | taxonomy-embedding@1.1.0 | title+keywords+description (73%) |
| concepts[instrument].gcmd_instrument:oci | source · NASA CMR | connector:nasa_cmr@1.0.0 | |
| concepts[measured_variable].gcmd:earth-science/biosphere/ecosystems/aquatic-ecosystems/plankton/phytoplankton | source · NASA CMR | connector:nasa_cmr@1.0.0 | |
| concepts[measured_variable].gcmd:earth-science/oceans/ocean-optics/absorption | source · NASA CMR | connector:nasa_cmr@1.0.0 | |
| concepts[measured_variable].gcmd:earth-science/oceans/ocean-optics/attenuation-transmission | source · NASA CMR | connector:nasa_cmr@1.0.0 | |
| concepts[measured_variable].gcmd:earth-science/oceans/ocean-optics/gelbstoff | source · NASA CMR | connector:nasa_cmr@1.0.0 | |
| concepts[measured_variable].gcmd:earth-science/oceans/ocean-optics/reflectance | source · NASA CMR | connector:nasa_cmr@1.0.0 | |
| concepts[measured_variable].gcmd:earth-science/oceans/ocean-optics/scattering | source · NASA CMR | connector:nasa_cmr@1.0.0 | |
| concepts[measured_variable].gcmd:earth-science-services/environmental-advisories/hydrological-advisories/water-quality | source · NASA CMR | connector:nasa_cmr@1.0.0 | |
| concepts[measured_variable].gcmd:earth-science/terrestrial-hydrosphere/surface-water | source · NASA CMR | connector:nasa_cmr@1.0.0 | |
| concepts[measured_variable].gcmd:earth-science/terrestrial-hydrosphere/water-quality-water-chemistry/water-characteristics/light-transmission | source · NASA CMR | connector:nasa_cmr@1.0.0 | |
| concepts[measured_variable].gcmd:earth-science/terrestrial-hydrosphere/water-quality-water-chemistry/water-characteristics/organic-matter | source · NASA CMR | connector:nasa_cmr@1.0.0 | |
| concepts[modality].local:modality:remote-sensing | enrichment · NASA CMR | keyword-concept-rules@1.0.0 | title+description (65%) |
| concepts[platform].gcmd_platform:pace | source · NASA CMR | connector:nasa_cmr@1.0.0 | |
| created_date | source · NASA CMR | connector:nasa_cmr@1.0.0 | |
| description | source · NASA CMR | connector:nasa_cmr@1.0.0 | /umm/Abstract |
| publication_date | source · NASA CMR | connector:nasa_cmr@1.0.0 | |
| spatial | source · NASA CMR | connector:nasa_cmr@1.0.0 | /umm/SpatialExtent |
| temporal | source · NASA CMR | connector:nasa_cmr@1.0.0 | /umm/TemporalExtents |
| title | source · NASA CMR | connector:nasa_cmr@1.0.0 | /umm/EntryTitle |
| updated_date | source · NASA CMR | connector:nasa_cmr@1.0.0 | |
| version_label | source · NASA CMR | connector:nasa_cmr@1.0.0 |