Almost all OMI Level 2 and Level 3 Version-3 products based on better calibrated OMI Level-1B Radiance Products (V003) and enhanced retrieval algorithm are now Available.
Alert! Two Recent Data Anomalies, starting since June 2007 and May 2008, have occurred. The anomalies are currently under investigation. Be cautious since the current Level 1B, Level-2 and Level-3 data have not been flagged or corrected for these anomalies, Read more
Users are advised to read data quality and validation documents (provided by the algorithm leads) before using these data for research purposes.
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OMI Level 2 Orbital Swath (13x24 km) and Global Gridded L2G and
Level 3e (0.25x0.25 deg) and Level 3d (1.0x1.0 deg) Products
(
Version 3 )
Version-3
Products and Data Access
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Product Description |
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Aerosols |
OMAERUV
OMAERUVG
OMAERUVd
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OMI/Aura Near-UV Aerosol Extinction and Absorption Optical Depth |
OMAERO
OMAEROG
OMAEROe |
OMI/Aura Multi-Wavelength Aerosol Optical Depth and single Scattering Albedo |
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Clouds |
OMCLDRR
OMCLDRRG |
OMI/Aura Cloud Pressure and Fraction, Raman Scattering Algorithm |
OMCLDO2
OMCLDO2G |
OMI/Aura Cloud Pressure and Fraction, O2-O2 Absorption Algorithm |
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NO2 |
OMNO2
OMNO2G |
OMI/Aura Nitrogen Dioxide Total and Tropospheric Columns |
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SO2 |
OMSO2
OMSO2G
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OMI/Aura Sulphur Dioxide (SO2) Total Column |
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Ozone |
OMDOAO3
OMDOAO3G
OMDOAO3e |
OMI/Aura Ozone (DOAS technique) Total Column |
OMTO3
OMTO3G
OMTO3d
OMTO3e
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OMI/Aura Ozone (TOMS-like Algorithm) Total Column |
OMO3PR
OMO3PRG
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OMI/Aura Ozone Profile |
OMTROO3
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OMI/Aura Ozone Tropospheric Column |
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BrO, HCHO, OClO |
OMBRO
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OMI/Aura Bromine Monoxide (BrO) Total Column |
OMHCHO
OMHCHOG
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OMI/Aura Formaldehyde (HCHO) Total Column |
OMOCLO
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OMI/Aura Chlorine Dioxide (OClO) Slant Column |
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Surface UV-B Irradiances |
| OMUVB |
OMI/Aura Surface UVB Irradiance & Erythemal Dose Rate |
| Level-3 Global Gridded Surface UVB Irradiance data product OMUVBL3 is available in older version, The reprocessed Level-3 UVB data (version003) will be available soon. |
Version 003 OMI Level 1B Products
Orbital Swath Pixels (UV1, 13x48 km; UV2 & VIS, 13x24 km; Zoom, 13x12 km )
Version-3 L1B Products &
Data Access
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Description |
| OML1BRUG |
OMI Geolocated Earth Radiances for 716 UV Channels (264-383 nm)
(159 UV1 channels in 264 - 311 nm, 13x48 km spatial resolution ;
557 UV2 channels in 307-383 nm, 13x24 km spatial resolution)
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| OML1BRUZ |
OMI Zoom-in Geolocated Earth Radiances for 716 UV Channels (264 - 383 nm),
13x12 km spatial resolution
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| OML1BRVG |
OMI Geolocated Earth Radiances for 751 Visible Channels (349 - 504 nm)
13x24 km spatial resolution
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| OML1BRVZ |
OMI Zoom-in Geolocated Earth Radiances for 751 Vis Channels (349 - 504 nm), 13x12 km spatial resolution |
| OML1BIRR |
OMI Solar Irradiances for 716 UV and 751 Visible Channels (264 - 504 nm) |
Two Recent Known Data Anomalies
(1) Between 25 and 27 June 2007, a change occurred in the OMI instrument in the cross track positions 54-55 (zero based). A decrease in the radiance signal of about 20-30% under illuminated conditions is observed over the complete illuminated part of the orbit. All wavelengths in the UV2 and VIS channels are affected by this effect.
(2) Since 11 May 2008, another signal suppression has been observed in the across-track positions 38-41 in the UV2 & VIS channels, but only for northern latitudes, at Solar Zenith Angles (SZAs) larger than 44.0 degrees for the affected rows (though data at lower SZAs is also suspect). It is recommended not to use the affected rows at all latitudes and SZAs for now.
The anomalies are currently under investigation to examine whether correction for the effect can be implemented in the level 1b data. No correction has been implemented at the moment. It is recommended not to use the affected data for now.
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Atmos Composition
