Skip to main content

Description

The SeaWiFS Deep Blue (SWDB) Level 2 Product contains data corresponding to a single SeaWiFS swath using Deep Blue algorithm. There are about 15 Level 2 data files produced per day. Each contains retrieved aerosol properties averaged to a resolution of 3x3 SeaWiFS pixels (13.5x13.5 km at the center of the swath given 4.5km SeaWiFS pixels).

The primary data parameters are aerosol optical thickness, and Angstrom exponent.

Version Description

This is the version 4 data processed in June 2013

Product Summary

Platforms
OrbView-2
Instruments
SeaWiFS
Spatial Extent

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

Geographic Region
GLOBAL
Coordinate System
CARTESIAN
Granule Spatial Representation
ORBIT
Temporal Extent
1997-09-04 to 2010-12-11
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
C1239900189-GES_DISC
Data State
COMPLETE
Number of Files/Granules
68484
Processing Level
2
Published
Updated
Science Keywords
Aerosol Optical Depth/Thickness ,
Angstrom Exponent ,
Optical Depth/Thickness

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

Hsu, N. C. (2013). SeaWiFS Deep Blue Aerosol Optical Depth and Angstrom Exponent Daily Level 2 Data V4.0 [Data set]. NASA Goddard Earth Sciences Data and Information Services Center. https://doi.org/10.5067/MEASURES/SWDB/DATA201 Date Accessed: 2025-12-15

Documents

Variables

Variables are a set of physical properties whose values determine the characteristics or behavior of something. For example, temperature and pressure are variables of the atmosphere. Parameters and variables can be used interchangeably. Variable level attributes provide individual information for each variable.

The Name in this table is the variable name. Fill value indicates missing or undefined data points in a variable. Valid range is the range of values the variable can store. Scale factor is used to increase or decrease the size of an object and can be used to correct for distortion. For questions on a specific variable, please use the Earthdata Forum.

Name Description Units Data Type Fill Value Valid Range Scale Factor
aerosol_optical_thickness_550_land aerosol_optical_thickness_550_land 1 float32 -999 N/A N/A
aerosol_optical_thickness_550_land_ocean aerosol_optical_thickness_550_land_ocean 1 float32 -999 N/A N/A
aerosol_optical_thickness_550_land_ocean_best_estimate aerosol_optical_thickness_550_land_ocean_best_estimate 1 float32 -999 N/A N/A
aerosol_optical_thickness_550_ocean aerosol_optical_thickness_550_ocean 1 float32 -999 N/A N/A
aerosol_optical_thickness_confidence_flag_land aerosol_optical_thickness_confidence_flag_land N/A int32 -999 N/A N/A
aerosol_optical_thickness_confidence_flag_land_ocean aerosol_optical_thickness_confidence_flag_land_ocean N/A int32 -999 N/A N/A
aerosol_optical_thickness_confidence_flag_ocean aerosol_optical_thickness_confidence_flag_ocean N/A int32 999 N/A N/A
aerosol_optical_thickness_land aerosol_optical_thickness_land 1 float32 -999 N/A N/A
aerosol_optical_thickness_ocean aerosol_optical_thickness_ocean 1 float32 -999 N/A N/A
angstrom_exponent_confidence_flag_land angstrom_exponent_confidence_flag_land N/A int32 -999 N/A N/A
angstrom_exponent_confidence_flag_land_ocean angstrom_exponent_confidence_flag_land_ocean N/A int32 -999 N/A N/A
angstrom_exponent_confidence_flag_ocean angstrom_exponent_confidence_flag_ocean N/A int32 -999 N/A N/A
angstrom_exponent_land angstrom_exponent_land 1 float32 -999 N/A N/A
angstrom_exponent_land_ocean angstrom_exponent_land_ocean 1 float32 -999 N/A N/A
angstrom_exponent_ocean angstrom_exponent_ocean 1 float32 -999 N/A N/A
diagnostics/aerosol_index diagnostics/aerosol_index N/A float32 -999 N/A N/A
diagnostics/aerosol_optical_thickness_550_stddev_land diagnostics/aerosol_optical_thickness_550_stddev_land 1 float32 -999 N/A N/A
diagnostics/aerosol_optical_thickness_550_stddev_ocean diagnostics/aerosol_optical_thickness_550_stddev_ocean 1 float32 -999 N/A N/A
diagnostics/aerosol_optical_thickness_out_of_bounds_mask_land diagnostics/aerosol_optical_thickness_out_of_bounds_mask_land N/A int32 -999 N/A N/A
diagnostics/aerosol_optical_thickness_processing_flag_land_ocean diagnostics/aerosol_optical_thickness_processing_flag_land_ocean N/A int32 -999 N/A N/A
diagnostics/aerosol_optical_thickness_stddev_land diagnostics/aerosol_optical_thickness_stddev_land 1 float32 -999 N/A N/A
diagnostics/aerosol_optical_thickness_stddev_ocean diagnostics/aerosol_optical_thickness_stddev_ocean 1 float32 -999 N/A N/A
diagnostics/cloud_fraction diagnostics/cloud_fraction N/A float32 -999 N/A N/A
diagnostics/fine_mode_volume_fraction_ocean diagnostics/fine_mode_volume_fraction_ocean N/A float32 -999 N/A N/A
diagnostics/fine_mode_volume_fraction_stddev_ocean diagnostics/fine_mode_volume_fraction_stddev_ocean N/A float32 -999 N/A N/A
diagnostics/lambertian_equivalent_reflectivity_land diagnostics/lambertian_equivalent_reflectivity_land N/A float32 -999 N/A N/A
diagnostics/lambertian_equivalent_reflectivity_ocean diagnostics/lambertian_equivalent_reflectivity_ocean N/A float32 -999 N/A N/A
diagnostics/normalized_difference_vegetation_index_land diagnostics/normalized_difference_vegetation_index_land N/A float32 -999 N/A N/A
diagnostics/retrieval_fitting_sqrtsumsq_ocean diagnostics/retrieval_fitting_sqrtsumsq_ocean N/A float32 -999 N/A N/A
diagnostics/surface_reflectance_land diagnostics/surface_reflectance_land N/A float32 -999 N/A N/A
diagnostics/toa_reflectance_land diagnostics/toa_reflectance_land N/A float32 -999 N/A N/A
diagnostics/toa_reflectance_ocean diagnostics/toa_reflectance_ocean N/A float32 -999 N/A N/A
diagnostics/toa_stddev_within_0.2_degrees diagnostics/toa_stddev_within_0.2_degrees N/A float32 -999 N/A N/A
diagnostics/wind_speed diagnostics/wind_speed m s-1 float32 -999 N/A N/A
land_bands land_bands nm float32 N/A N/A N/A
latitude latitude degrees_north float32 N/A N/A N/A
longitude longitude degrees_east float32 N/A N/A N/A
natrack natrack 1 float32 N/A N/A N/A
number_pixels_used_land number_pixels_used_land count int32 -999 N/A N/A
number_pixels_used_ocean number_pixels_used_ocean count int32 -999 N/A N/A
nxtrack nxtrack 1 float32 N/A N/A N/A
ocean_bands ocean_bands nm float32 N/A N/A N/A
relative_azimuth_angle relative_azimuth_angle degrees float32 -999 N/A N/A
scattering_angle scattering_angle degrees float32 -999 N/A N/A
solar_zenith_angle solar_zenith_angle degrees float32 -999 N/A N/A
time_of_measurement time_of_measurement seconds since 1993-01-01 00:00:00.0 int32 N/A N/A N/A
viewing_zenith_angle viewing_zenith_angle degrees float32 -999 N/A N/A
You're viewing 47 of 47