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Description

The SeaWiFS Deep Blue (SWDB) Level 3 daily global gridded (0.5 x 0.5 deg) data is derived from SeaWiFS Deep Blue Level 2 data. In most cases, each data field represents the arithmetic mean of all cells whose latitude and longitude places it within the bounds of each grid element. Furthermore, only cells measured on the day of interest are included in this calculation. The local date based on the longitude of the cell is calculated from the time of measurement. If the local date equals the day of interest, the cell is included in the L3 data processing.

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
CARTESIAN
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
C1239900190-GES_DISC
Data State
COMPLETE
Number of Files/Granules
4520
Processing Level
3
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 3 Data Gridded at 0.5 Degree V4.0 [Data set]. NASA Goddard Earth Sciences Data and Information Services Center. https://doi.org/10.5067/MEASURES/SWDB/DATA301 Date Accessed: 2026-01-09

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_count_land aerosol_optical_thickness_550_count_land count int32 -999 N/A N/A
aerosol_optical_thickness_550_count_land_ocean aerosol_optical_thickness_550_count_land_ocean count int32 -999 N/A N/A
aerosol_optical_thickness_550_count_ocean aerosol_optical_thickness_550_count_ocean count int32 -999 N/A N/A
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_ocean aerosol_optical_thickness_550_ocean 1 float32 -999 N/A N/A
aerosol_optical_thickness_550_stddev_land aerosol_optical_thickness_550_stddev_land 1 float32 -999 N/A N/A
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