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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/veff_mode2_uncertainty Uncertainty of aerosol effective variance (mode 2) N/A float32 -32767 N/A N/A N/A
geophysical_data/veff_mode3 Aerosol effective variance (mode 3) N/A float32 -32767 N/A N/A N/A
geophysical_data/veff_mode3_uncertainty Uncertainty of aerosol effective variance (mode 3) N/A float32 -32767 N/A N/A N/A
geophysical_data/waterfrac_inland Water fraction for pixel over land N/A float32 -32767 N/A N/A N/A
geophysical_data/waterfrac_inland_uncertainty Uncertainty of water fraction for pixel over land N/A float32 -32767 N/A N/A N/A
geophysical_data/windspeed_inland Water wind speed for pixel over land N/A float32 -32767 N/A N/A N/A
geophysical_data/windspeed_inland_uncertainty Uncertainty of water wind speed for pixel over land N/A float32 -32767 N/A N/A N/A
geophysical_data/wind_speed Wind speed m/s float32 -32767 N/A N/A N/A
geophysical_data/wind_speed_uncertainty Uncertainty of wind speed m/s float32 -32767 N/A N/A N/A
processing_control/refr_base_mi_mode1_compnt1 Refractive index component 1 (mode 1, imaginary part) N/A float32 -32767 N/A N/A N/A
processing_control/refr_base_mi_mode1_compnt2 Refractive index component 2 (mode 1, imaginary part) N/A float32 -32767 N/A N/A N/A
processing_control/refr_base_mi_mode1_compnt3 Refractive index component 3 (mode 1, imaginary part) N/A float32 -32767 N/A N/A N/A
processing_control/refr_base_mi_mode1_compnt4 Refractive index component 4 (mode 1, imaginary part) N/A float32 -32767 N/A N/A N/A
processing_control/refr_base_mi_mode2_compnt1 Refractive index component 1 (mode 2, imaginary part) N/A float32 -32767 N/A N/A N/A
processing_control/refr_base_mi_mode2_compnt2 Refractive index component 2 (mode 2, imaginary part) N/A float32 -32767 N/A N/A N/A
processing_control/refr_base_mi_mode3_compnt1 Refractive index component 1 (mode 3, imaginary part) N/A float32 -32767 N/A N/A N/A
processing_control/refr_base_mr_mode1_compnt1 Refractive index component 1 (mode 1, real part) N/A float32 -32767 N/A N/A N/A
processing_control/refr_base_mr_mode1_compnt2 Refractive index component 2 (mode 1, real part) N/A float32 -32767 N/A N/A N/A
processing_control/refr_base_mr_mode1_compnt3 Refractive index component 3 (mode 1, real part) N/A float32 -32767 N/A N/A N/A
processing_control/refr_base_mr_mode1_compnt4 Refractive index component 4 (mode 1, real part) N/A float32 -32767 N/A N/A N/A
processing_control/refr_base_mr_mode2_compnt1 Refractive index component 1 (mode 2, real part) N/A float32 -32767 N/A N/A N/A
processing_control/refr_base_mr_mode2_compnt2 Refractive index component 2 (mode 2, real part) N/A float32 -32767 N/A N/A N/A
processing_control/refr_base_mr_mode3_compnt1 Refractive index component 1 (mode 3, real part) N/A float32 -32767 N/A N/A N/A
sensor_band_parameters/wavelength Wavelengths nm float32 -32767 N/A N/A N/A
sensor_band_parameters/wavelength3d Wavelengths for optical properties nm float32 -32767 N/A N/A N/A
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