Skip to main content

Description

The OMI science team produces this Level-3 Aura/OMI Global OMDOAO3e Data Products (0.25deg Lat/Lon grids). This Level-3 global total column ozone product is derived from OMDOAO3 which is based on the Differential Absorption Spectroscopy (DOAS) fitting technique that essentially uses the OMI visible radiance values between 331.1 and 336.1 nm. In addition to the total ozone column (best quality data, satisfying the shortest path length) and its precision this product also contains some ancillary parameters such as cloud fraction, cloud height, etc. The short name for this Level-3 OMI ozone product is OMDOAO3e and the lead Algorithm scientist for this product and for OMDOAO3 (the data source of OMDOAO3e) is Dr. Pepijn Veefkind from KNMI.

The OMDOAO3e product files are stored in the version 5 Hierarchical Data Format (HDF-EOS5). Each daily file contains data from the day lit portion of the orbits (approximately 14 orbits) and is roughly 8 MB in size.

Product Summary

Platforms
Aura
Instruments
OMI
Spatial Extent

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

Geographic Region
GLOBAL
Coordinate System
CARTESIAN
Granule Spatial Representation
CARTESIAN
Temporal Extent
2004-10-01 to Present
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
C1266136037-GES_DISC
Data State
ACTIVE
Number of Files/Granules
7709
Processing Level
3
Published
Updated
Science Keywords
Atmospheric Ozone

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

Veefkind, P. (2012). OMI/Aura Ozone (O3) DOAS Total Column Daily L3 Global 0.25deg Lat/Lon Grid [Data set]. NASA Goddard Earth Sciences Data and Information Services Center. https://doi.org/10.5067/AURA/OMI/DATA3005 Date Accessed: 2025-12-14

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
HDFEOS/GRIDS/ColumnAmountO3/Data Fields/CloudFraction Effective cloud fraction NoUnits float32 -1.2676506002282E+30 N/A N/A
HDFEOS/GRIDS/ColumnAmountO3/Data Fields/CloudFractionPrecision Effective cloud fraction precision NoUnits float32 -1.2676506002282E+30 N/A N/A
HDFEOS/GRIDS/ColumnAmountO3/Data Fields/CloudPressure Effective cloud pressure hPa float32 -1.2676506002282E+30 N/A N/A
HDFEOS/GRIDS/ColumnAmountO3/Data Fields/CloudPressurePrecision Effective cloud pressure precision hPa float32 -1.2676506002282E+30 N/A N/A
HDFEOS/GRIDS/ColumnAmountO3/Data Fields/ColumnAmountO3 Ozone vertical column density DU float32 -1.2676506002282E+30 N/A N/A
HDFEOS/GRIDS/ColumnAmountO3/Data Fields/ColumnAmountO3Precision Precision of the ozone vertical column density DU float32 -1.2676506002282E+30 N/A N/A
HDFEOS/GRIDS/ColumnAmountO3/Data Fields/EffectiveTemperature Fitted Effective temperature of the ozone degree Celsius int8 0 N/A N/A
HDFEOS/GRIDS/ColumnAmountO3/Data Fields/EffectiveTemperaturePrecision Precision of the Fitted Effective temperature of the ozone degree Celsius int8 0 N/A N/A
HDFEOS/GRIDS/ColumnAmountO3/Data Fields/GhostColumnAmountO3 Ozone ghost column density DU float32 -1.2676506002282E+30 N/A N/A
HDFEOS/GRIDS/ColumnAmountO3/Data Fields/SolarZenithAngle Solar zenith angle at WGS84 ellipsoid for center co-ordinate of the ground pixel deg float32 -1.2676506002282E+30 N/A N/A
HDFEOS/GRIDS/ColumnAmountO3/Data Fields/TerrainHeight Terrain height for center co-ordinate of the ground pixel m int16 -32767 N/A N/A
HDFEOS/GRIDS/ColumnAmountO3/Data Fields/TerrainReflectivity Reflectivity of the ground pixel NoUnits float32 -1.2676506002282E+30 N/A N/A
HDFEOS/GRIDS/ColumnAmountO3/Data Fields/ViewingZenithAngle Viewing zenith angle at WGS84 ellipsoid for center co-ordinate of the ground pixel deg float32 -1.2676506002282E+30 N/A N/A
HDFEOS INFORMATION/StructMetadata.0 HDFEOS INFORMATION/StructMetadata.0 N/A OTHER N/A N/A N/A
You're viewing 14 of 14