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Description

AER_RTAPLAND provides aerosol and land‐surface properties over land retrieved using the RemoTAP algorithm. Because RemoTAP jointly models surface and atmosphere over land, the suite also provides spectrally resolved land-surface BRDF and BPDF parameters for reflectance and polarization. Typical uses: air-quality and climate studies, aerosol context for ocean-color/land analyses, radiative transfer, and model evaluation.
Core geophysical variables in this suite include:
• alh — Aerosol layer height (km)
• angstrom_440_670 / angstrom_440_870 / angstrom_490_670 — Aerosol Ångström exponents (unitless)
• aot / aot550 / aot_fine / aot_coarse — Aerosol optical thickness (unitless)
• bpdf_scale, ross_thick, li_sparse, snow_coef — BRDF/BDPF kernel coefficients (unitless)
• chla — Chlorophyll-a concentration (mg m⁻³)
• fmf / fvf — Aerosol fine mode fraction and fine mode volume fraction (unitless)
• lidar_bsca_total / lidar_depol_ratio / lidar_ratio — Aerosol lidar diagnostics (sr⁻¹ m⁻¹, unitless)
• mi / mr — Aerosol refractive index (imaginary/real part, unitless)
• reff_fine / reff_coarse — Aerosol effective radius (µm)
• sph — Aerosol spherical fraction (unitless)
• ssa — Aerosol single scattering albedo (unitless)
• vd / veff_fine / veff_coarse — Aerosol volume density (µm³ µm⁻²) and effective variance (unitless)
• waterfrac_inland — Water fraction for inland pixels (unitless)
• wind_speed — Ocean surface wind speed (m s⁻¹)

Product Summary

Platforms
PACE
Instruments
SPEXone
Spatial Extent

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

Location
GLOBAL OCEAN
Coordinate System
CARTESIAN
Granule Spatial Representation
GEODETIC
Temporal Extent
2024-02-25 to Present
Data Partner
Ocean Biology Processing Group (OBPG) ,
Ocean Biology Distributed Active Archive Center (OB.DAAC), Global Change Data Center, Earth Sciences Division, Science and Exploration Directorate, Goddard Space Flight Center, NASA (NASA/GSFC/SED/ESD/GCDC/OB.DAAC)
Concept ID
C3555839744-OB_CLOUD
Data State
ACTIVE
Number of Files/Granules
13937
Processing Level
2
Published
Updated
Science Keywords
Aerosols ,
Aerosol Particle Properties

Documents

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
geophysical_data/angstrom_490_670_uncertainty Uncertainty of aerosol Angstrom exponent, 490 to 670 nm N/A float32 -32767 N/A N/A N/A
geophysical_data/aot Aerosol optical thickness N/A float32 -32767 N/A N/A N/A
geophysical_data/aot550 Aerosol optical thickness at 550 nm N/A float32 -32767 N/A N/A N/A
geophysical_data/aot550_uncertainty Uncertainty of aerosol optical thickness at 550 nm N/A float32 -32767 N/A N/A N/A
geophysical_data/aot_coarse Aerosol optical thickness (coarse mode) N/A float32 -32767 N/A N/A N/A
geophysical_data/aot_coarse_uncertainty Uncertainty of aerosol optical thickness (coarse mode) N/A float32 -32767 N/A N/A N/A
geophysical_data/aot_fine Aerosol optical thickness (fine mode) N/A float32 -32767 N/A N/A N/A
geophysical_data/aot_fine_uncertainty Uncertainty of aerosol optical thickness (fine mode) N/A float32 -32767 N/A N/A N/A
geophysical_data/aot_mode1 Aerosol optical thickness (mode 1) N/A float32 -32767 N/A N/A N/A
geophysical_data/aot_mode1_uncertainty Uncertainty of aerosol optical thickness (mode 1) N/A float32 -32767 N/A N/A N/A
geophysical_data/aot_mode2 Aerosol optical thickness (mode 2) N/A float32 -32767 N/A N/A N/A
geophysical_data/aot_mode2_uncertainty Uncertainty of aerosol optical thickness (mode 2) N/A float32 -32767 N/A N/A N/A
geophysical_data/aot_mode3 Aerosol optical thickness (mode 3) N/A float32 -32767 N/A N/A N/A
geophysical_data/aot_mode3_uncertainty Uncertainty of aerosol optical thickness (mode 3) N/A float32 -32767 N/A N/A N/A
geophysical_data/aot_uncertainty Uncertainty of aerosol optical thickness N/A float32 -32767 N/A N/A N/A
geophysical_data/bpdf_nu Bi-directional surface polarization distribution function exponential (nu) parameter N/A float32 -32767 N/A N/A N/A
geophysical_data/bpdf_nu_uncertainty Uncertainty of bi-directional surface polarization distribution function exponential (nu) parameter N/A float32 -32767 N/A N/A N/A
geophysical_data/bpdf_scale Bi-directional surface polarization distribution function scaling parameter N/A float32 -32767 N/A N/A N/A
geophysical_data/bpdf_scale_uncertainty Uncertainty of bi-directional surface polarization distribution function scaling parameter N/A float32 -32767 N/A N/A N/A
geophysical_data/chla Chlorophyll-a concentration mg m^-3 float32 -32767 N/A N/A N/A
geophysical_data/chla_uncertainty Uncertainty of Chlorophyll-a concentration mg m^-3 float32 -32767 N/A N/A N/A
geophysical_data/column_number_mode1 Aerosol column number (mode 1) m^-2 float32 -32767 N/A N/A N/A
geophysical_data/column_number_mode1_uncertainty Uncertainty of aerosol column number (mode 1) m^-2 float32 -32767 N/A N/A N/A
geophysical_data/column_number_mode2 Aerosol column number (mode 2) m^-2 float32 -32767 N/A N/A N/A
geophysical_data/column_number_mode2_uncertainty Uncertainty of aerosol column number (mode 2) m^-2 float32 -32767 N/A N/A N/A
geophysical_data/column_number_mode3 Aerosol column number (mode 3) m^-2 float32 -32767 N/A N/A N/A
geophysical_data/column_number_mode3_uncertainty Uncertainty of aerosol column number (mode 3) m^-2 float32 -32767 N/A N/A N/A
geophysical_data/fmf Aerosol fine mode fraction (aot_fine/aot) N/A float32 -32767 N/A N/A N/A
geophysical_data/fvf Aerosol fine mode volume fraction (vd_fine/vd) N/A float32 -32767 N/A N/A N/A
geophysical_data/f_isotropic Surface isotropic scaling parameter for each band N/A float32 -32767 N/A N/A N/A
geophysical_data/lidar_bsca_total Diagnostic aerosol lidar backscatter coefficient N/A float32 -32767 N/A N/A N/A
geophysical_data/lidar_depol_ratio Diagnostic aerosol lidar depolarization ratio N/A float32 -32767 N/A N/A N/A
geophysical_data/lidar_p11_pi Phase function p11 in backscatter direction N/A float32 -32767 N/A N/A N/A
geophysical_data/lidar_ratio Diagnostic aerosol lidar ratio N/A float32 -32767 N/A N/A N/A
geophysical_data/li_sparse Bi-directional surface reflectance distribution function li-sparse kernel coefficient N/A float32 -32767 N/A N/A N/A
geophysical_data/li_sparse_uncertainty Uncertainty of bi-directional surface reflectance distribution function li-sparse kernel coefficient N/A float32 -32767 N/A N/A N/A
geophysical_data/mi Aerosol refractive index (volume density weighted, imaginary part) N/A float32 -32767 N/A N/A N/A
geophysical_data/mi_coarse Aerosol refractive index (coarse mode, imaginary part) N/A float32 -32767 N/A N/A N/A
geophysical_data/mi_fine Aerosol refractive index (fine mode, imaginary part) N/A float32 -32767 N/A N/A N/A
geophysical_data/mi_mode1 Aerosol refractive index (mode 1, imaginary part) N/A float32 -32767 N/A N/A N/A
geophysical_data/mi_mode1_uncertainty Uncertainty of aerosol refractive index (mode 1, imaginary part) N/A float32 -32767 N/A N/A N/A
geophysical_data/mi_mode2 Aerosol refractive index (mode 2, imaginary part) N/A float32 -32767 N/A N/A N/A
geophysical_data/mi_mode2_uncertainty Uncertainty of aerosol refractive index (mode 2, imaginary part) N/A float32 -32767 N/A N/A N/A
geophysical_data/mi_mode3 Aerosol refractive index (mode 3, imaginary part) N/A float32 -32767 N/A N/A N/A
geophysical_data/mi_mode3_uncertainty Uncertainty of aerosol refractive index (mode 3, imaginary part) N/A float32 -32767 N/A N/A N/A
geophysical_data/mr Aerosol refractive index (volume density weighted, real part) N/A float32 -32767 N/A N/A N/A
geophysical_data/mr_coarse Aerosol refractive index (coarse mode, real part) N/A float32 -32767 N/A N/A N/A
geophysical_data/mr_fine Aerosol refractive index (fine mode, real part) N/A float32 -32767 N/A N/A N/A
geophysical_data/mr_mode1 Aerosol refractive index (mode 1, real part) N/A float32 -32767 N/A N/A N/A
geophysical_data/mr_mode1_uncertainty Uncertainty of aerosol refractive index (mode 1, real part) N/A float32 -32767 N/A N/A N/A
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