Creator: GES_DISC
Keywords: Atmospheric Ozone

Data at a Glance

Description

This Level-2G daily global gridded product OMDOAO3G is based on the pixel level OMI Level-2 DOAO3 product OMDOAO3. This Level-2G 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 this product also contains some auxiliary derived and ancillary input parameters, e.g. ozone slant column density, ozone ghost column density, etc. The short name for this Level-2 OMI ozone product is OMDOAO3G and the lead algorithm scientist for this product and for OMDOAO3 (the data source of OMDOAO3G) is Dr. Pepijn Veefkind from KNMI.

The OMDOAO3G 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 80 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

C1266136103-GES_DISC

Data State

ACTIVE

Number of Files/Granules

7711

Processing Level

Published

2004-10-01

Updated

2012-03-09

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

Select a Citation Style:

Veefkind, P. (2012). OMI/Aura Ozone (O3) DOAS Total Column Daily L2 Global 0.25 deg Lat/Lon Grid [Data set]. NASA Goddard Earth Sciences Data and Information Services Center. https://doi.org/10.5067/AURA/OMI/DATA2013 Date Accessed: 2025-12-13

Documents

READ-ME

PI DOCUMENTATION

File Specification Document

ALGORITHM THEORETICAL BASIS DOCUMENT (ATBD)

OMI Algorithm Theoretical Basis Documents

PUBLICATIONS

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 Sort descending	Description	Units	Data Type	Fill Value	Valid Range	Scale Factor
HDFEOS/GRIDS/ColumnAmountO3/Data Fields/AirMassFactor	Air Mass Factor	NoUnits	float32	-1.2676506002282E+30	N/A	N/A
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	-127	N/A	N/A
HDFEOS/GRIDS/ColumnAmountO3/Data Fields/EffectiveTemperaturePrecision	Precision of the Fitted Effective temperature of the ozone	degree Celsius	int8	-127	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/GroundPixelQualityFlags	Ground Pixel Quality Flags	NoUnits	uint16	65535	N/A	N/A
HDFEOS/GRIDS/ColumnAmountO3/Data Fields/InstrumentConfigurationId	Unique ID for instrument settings for current measurement	NoUnits	uint8	255	N/A	N/A
HDFEOS/GRIDS/ColumnAmountO3/Data Fields/Latitude	Latitude of the center of the groundpixel	deg	float32	-1.2676506002282E+30	N/A	N/A
HDFEOS/GRIDS/ColumnAmountO3/Data Fields/LineNumber	Line Number of Candidate Scene	NoUnits	int32	-2000000000	N/A	N/A
HDFEOS/GRIDS/ColumnAmountO3/Data Fields/Longitude	Longitude of the center of the groundpixel	deg	float32	-1.2676506002282E+30	N/A	N/A
HDFEOS/GRIDS/ColumnAmountO3/Data Fields/MeasurementQualityFlags	Bit level quality flags at measurement level	NoUnits	uint8	255	N/A	N/A
HDFEOS/GRIDS/ColumnAmountO3/Data Fields/NumberOfCandidateScenes	Number of Candidate Scenes	NoUnits	int32	0	N/A	N/A
HDFEOS/GRIDS/ColumnAmountO3/Data Fields/OrbitNumber	Orbit Number of Candidate Scene	NoUnits	int32	-2000000000	N/A	N/A
HDFEOS/GRIDS/ColumnAmountO3/Data Fields/PathLength	Path Length	NoUnits	float32	1.2676506002282E+30	N/A	N/A
HDFEOS/GRIDS/ColumnAmountO3/Data Fields/ProcessingQualityFlags	Bit level quality flags at ground pixel level	NoUnits	uint16	65535	N/A	N/A
HDFEOS/GRIDS/ColumnAmountO3/Data Fields/RootMeanSquareErrorOfFit	Root-Mean-Square error of DOAS fit	NoUnits	float32	-1.2676506002282E+30	N/A	N/A
HDFEOS/GRIDS/ColumnAmountO3/Data Fields/SceneNumber	Scene Number of Candidate Scene	NoUnits	int32	-2000000000	N/A	N/A
HDFEOS/GRIDS/ColumnAmountO3/Data Fields/SlantColumnAmountO3	Ozone slant column density	DU	float32	-1.2676506002282E+30	N/A	N/A
HDFEOS/GRIDS/ColumnAmountO3/Data Fields/SlantColumnAmountO3Precision	Precision of the ozone slant column density	DU	float32	-1.2676506002282E+30	N/A	N/A
HDFEOS/GRIDS/ColumnAmountO3/Data Fields/SolarAzimuthAngle	Solar azimuth angle at WGS84 ellipsoid for center co-ordinate of the ground pixel, defined East-of-North	deg	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/SpacecraftAltitude	Altitude above WGS84 ellipsoid	m	float32	-1.2676506002282E+30	N/A	N/A
HDFEOS/GRIDS/ColumnAmountO3/Data Fields/SpacecraftLatitude	Geodetic Latitude above WGS84 ellipsoid	deg	float32	-1.2676506002282E+30	N/A	N/A
HDFEOS/GRIDS/ColumnAmountO3/Data Fields/SpacecraftLongitude	Geodetic Longitude above WGS84 ellipsoid	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/TerrainPressure	Pressure of the center of the ground pixel	hPa	float32	-1.2676506002282E+30	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/Time	Time at Start of Scan (s, TAI93)	s	float64	-1.2676506002282E+30	N/A	N/A
HDFEOS/GRIDS/ColumnAmountO3/Data Fields/ViewingAzimuthAngle	Viewing azimuth angle at WGS84 ellipsoid for center co-ordinate of the ground pixel, defined East-of-North	deg	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/GRIDS/ColumnAmountO3/Data Fields/XTrackQualityFlags	Across Track Quality Flags	NoUnits	uint8	255	N/A	N/A
HDFEOS INFORMATION/ArchivedMetadata	HDFEOS INFORMATION/ArchivedMetadata	N/A	OTHER	N/A	N/A	N/A
HDFEOS INFORMATION/CoreMetadata	HDFEOS INFORMATION/CoreMetadata	N/A	OTHER	N/A	N/A	N/A
HDFEOS INFORMATION/StructMetadata.0	HDFEOS INFORMATION/StructMetadata.0	N/A	OTHER	N/A	N/A	N/A

OMI/Aura Ozone (O3) DOAS Total Column Daily L2 Global Gridded 0.25 degree x 0.25 degree V3 (OMDOAO3G) at GES DISC