Array · collection · 2024
PACE SPEXone Level-2 Regional Ocean Properties, RemoTAP Algorithm - Near Real-time (NRT) Data, version 4.0
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.
This suite provides aerosol optical/microphysical properties retrieved over the oceans, along with coupled surface parameters used in the retrieval. The suite includes spectral aerosol optical depth (AOD), single-scattering albedo (SSA), complex refractive index (real/imaginary), size distribution metrics (e.g., fine/coarse effective radii and fine-mode fraction), and aerosol shape/fraction spherical; it also reports ocean surface roughness (glint/wind parameterization) and “ocean body” properties that define the water-leaving signal for consistency with the coupled atmosphere–ocean inversion.
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Use AER_RTAPOCEAN for aerosol-climate and air-quality studies, as aerosol context for ocean-color atmospheric correction, and for model evaluation and data assimilation; pair it with OCI/HARP2 products for cross-sensor analyses. Core geophysical variables in this suite include: - chlor_a – Chlorophyll concentration (mg m⁻³) - alh – Aerosol layer height (km) - aot – Aerosol optical thickness (dimensionless) - aot550 – Aerosol optical thickness at 550 nm (dimensionless) - angstrom_440_670 – Ångström exponent, 440–670 nm (dimensionless) - angstrom_440_870 – Ångström exponent, 440–870 nm (dimensionless) - angstrom_490_670 – Ångström exponent, 490–670 nm (dimensionless) - fmf – Aerosol fine mode fraction (dimensionless) - fvf – Aerosol fine mode volume fraction (dimensionless) - lidar_bsca_total – Aerosol lidar backscatter coefficient (km⁻¹ sr⁻¹) - lidar_depol_ratio – Aerosol lidar depolarization ratio (dimensionless) - lidar_ratio – Aerosol lidar extinction-to-backscatter ratio (sr) - mi – Aerosol refractive index, imaginary part (dimensionless) - mr – Aerosol refractive index, real part (dimensionless) - reff_coarse – Aerosol effective radius, coarse mode (µm) - reff_fine – Aerosol effective radius, fine mode (µm) - sph – Aerosol spherical fraction (dimensionless) - ssa – Aerosol single scattering albedo (dimensionless) - vd – Aerosol volume density (µm³ µm⁻²) - veff_coarse – Aerosol effective variance, coarse mode (dimensionless) - veff_fine – Aerosol effective variance, fine mode (dimensionless) - waterfrac_inland – Water fraction over inland pixels (dimensionless, 0–1) - wind_speed – Wind speed (m s⁻¹)
Links
Get the data
Documentation and papers
- SPEXone Homepage earthdata.nasa.gov/data/instruments/SPEXone ↗
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
- oceandata.sci.gsfc.nasa.gov /files/atbd/atbd-obdaac-aerosol-from-RemoTAP.pdf ↗
ATBD for Ocean Properties, RemoTAP Algorithm - Near Real-time (NRT)
documentation · from NASA CMR
- oceandata.sci.gsfc.nasa.gov /files/reprocessing/PACE_Science_Data_V3_Release_Notes.pdf ↗
Product Release Notes for PACE SPEXone, Version 3
documentation · from NASA CMR
- oceandata.sci.gsfc.nasa.gov /files/reprocessing/PACE_Science_Data_V2_Release_Notes.pdf ↗
Product Release Notes for PACE SPEXone, Version 2
documentation · from NASA CMR
- oceandata.sci.gsfc.nasa.gov /files/reprocessing/PACE_Science_Data_V1_Release_Notes.pdf ↗
Product Release Notes for PACE SPEXone, Version 1
documentation · from NASA CMR
- oceandata.sci.gsfc.nasa.gov /files/reprocessing/PACE_SPEXone_V4_Release_Notes.pdf ↗
Product Release Notes for PACE SPEXone, Version 4
documentation · from NASA CMR
- PACE Homepage earthdata.nasa.gov/data/platforms/space-based-platforms/PACE ↗
documentation · from NASA CMR
Catalogue records · 2
- CMR record cmr.earthdata.nasa.gov/search/concepts/C4126554489-OB_CLOUD.html ↗
catalogue entry · from NASA CMR
- CMR UMM-JSON cmr.earthdata.nasa.gov/search/concepts/C4126554489-OB_CLOUD.umm_json ↗
metadata API · from NASA CMR
Topics
- Stated by source
- Aerosol Particle Properties · Aerosols · Chlorophyll Concentration · Ocean Color · Plankton, Aerosol, Cloud, ocean Ecosystem mission · Spectro-polarimeter for Planetary Exploration one
- Inferred from text
- Oceanography 74%
Provenance · 1 source records, 16 field assertions
| Source | Key | Last seen | Raw |
|---|---|---|---|
| NASA Earthdata CMR | C4126554489-OB_CLOUD | 11 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 (74%) |
| concepts[instrument].gcmd_instrument:spexone | source · NASA CMR | connector:nasa_cmr@1.0.0 | |
| concepts[measured_variable].gcmd:earth-science/atmosphere/aerosols | source · NASA CMR | connector:nasa_cmr@1.0.0 | |
| concepts[measured_variable].gcmd:earth-science/atmosphere/aerosols/aerosol-particle-properties | source · NASA CMR | connector:nasa_cmr@1.0.0 | |
| concepts[measured_variable].gcmd:earth-science/oceans/ocean-optics/chlorophyll/chlorophyll-concentration | source · NASA CMR | connector:nasa_cmr@1.0.0 | |
| concepts[measured_variable].gcmd:earth-science/oceans/ocean-optics/ocean-color | source · NASA CMR | connector:nasa_cmr@1.0.0 | |
| 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 |