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warn_icon.gif IMPORTANT MESSAGE Sep 28, 2016    OMI NO2 Reprocessed Data (Version 3.0) released   

The NASA Goddard Earth Sciences Data and Information Services Center (GES DISC), in partnership with members of the Aura/Ozone Measuring Instrument (OMI) science team, announce the availability of the full data set of the reprocessed OMNO2 Standard Product, which indicates atmospheric nitrogen dioxide (NO2) concentrations. OMNO2 data are available as Level 2 (orbital swath) data.  The OMNO2G data product is a special Level 2 data product where the pixel level data are binned into 0.25o x 0.25o  global grids without averaging. OMNO2d data are Level 3 data products created with pixel level data of good quality, binned and "averaged" into 0.25o x 0.25o degree global grids.

warn_icon.gif IMPORTANT MESSAGE Jul 24, 2015    Why do my Data Holdings look different?    

Accessing your data through the GES DISC web site may seem a little unfamiliar to you to these days, but we can assure you, your data is all still available. The location of the data in the online archive has not changed.

The GES DISC has implemented a new interactive interface to make finding data easier than ever. We've added features like searching by keywords, filtering by criteria such as measurements, processing level and spatial resolution, and sortable data columns so now you can fine tune your search results. To get you started we put together a Help document to introduce you to the new interface. If you have any questions about the new design please contact us using the Feedback link in the upper right-hand corner or contact the GES DISC Help Desk by sending email to

It is essential that MLS data users understand and apply the quality and status indicators contained in the files. Please download and read the appropriate MLS data quality document that describes these quantities and also gives expected precision, resolution, and known artifacts. Users are encouraged to register with the MLS science team at the Data User Registration web page to obtain updates and information about the MLS data products.


Level 2 Standard Atmospheric Products
ShortName & Data Access Description
v4.2 v3.4 / v3.3
ML2BRO.004 ML2BRO.003 MLS/Aura L2 Bromine Monoxide (BrO) Mixing Ratio
ML2CH3CL.004 ML2CH3CL.003 MLS/Aura L2 Methyl Chloride (CH3Cl) Mixing Ratio
ML2CH3CN.004 ML2CH3CN.003 MLS/Aura L2 Methyl Cyanide (CH3CN) Mixing Ratio
ML2CH3OH.004   MLS/Aura L2 Methanol (CH3OH) Mixing Ratio
ML2CLO.004 ML2CLO.003 MLS/Aura L2 Chlorine Monoxide (ClO) Mixing Ratio
ML2CO.004 ML2CO.003 MLS/Aura L2 Carbon Monoxide (CO) Mixing Ratio
ML2GPH.004 ML2GPH.003 MLS/Aura L2 Geopotential Height
ML2H2O.004 ML2H2O.003 MLS/Aura L2 Water Vapor (H2O) Mixing Ratio
ML2HCL.004 ML2HCL.003 MLS/Aura L2 Hydrogen Chloride (HCl) Mixing Ratio
ML2HCN.004 ML2HCN.003 MLS/Aura L2 Hydrogen Cyanide (HCN) Mixing Ratio
ML2HNO3.004 ML2HNO3.003 MLS/Aura L2 Nitric Acid (HNO3) Mixing Ratio
ML2HO2.004 ML2HO2.003 MLS/Aura L2 Hydroperoxy (HO2) Mixing Ratio
ML2HOCL.004 ML2HOCL.003 MLS/Aura L2 Hypochlorous Acid (HOCl) Mixing Ratio
ML2IWC.004 ML2IWC.003 MLS/Aura L2 Cloud Ice Product
ML2N2O.004 ML2N2O.003 MLS/Aura L2 Nitrous Oxide (N2O) Mixing Ratio
ML2O3.004 ML2O3.003 MLS/Aura L2 Ozone (O3) Mixing Ratio
ML2OH.004 ML2OH.003 MLS/Aura L2 Hydroxyl (OH) Mixing Ratio
ML2RHI.004 ML2RHI.003 MLS/Aura L2 Relative Humidity With Respect To Ice
ML2SO2.004 ML2SO2.003 MLS/Aura L2 Sulfur Dioxide (SO2) Mixing Ratio
ML2T.004 ML2T.003 MLS/Aura L2 Temperature


Level 2 Near-Real-Time Products (7 most recent days)
[NOTE: v2.2 NRT was discontinued Jan. 7, 2013]

User Registration Required

ShortName & Data Access Description
ML2O3_NRT.003 MLS/Aura Near-Real-Time L2 Ozone (O3) Mixing Ratio
ML2T_NRT.003 MLS/Aura Near-Real-Time L2 Temperature
ML2HNO3_NRT.003 MLS/Aura Near-Real-Time L2 Nitric Acid (HNO3) Mixing Ratio
ML2CO_NRT.003 MLS/Aura Near-Real-Time L2 Carbon Monoxide (CO) Mixing Ratio
ML2N2O_NRT.003 MLS/Aura Near-Real-Time L2 Nitrous Oxide (N2O) Mixing Ratio
ML2SO2_NRT.003 MLS/Aura Near-Real-Time L2 Sulfur Dioxide (SO2) Mixing Ratio
ML2H2O_NRT.003 MLS/Aura Near-Real-Time L2 Water Vapor (H2O) Mixing Ratio


Level 2 Atmospheric Diagnostics Products
Contact MLS Science Team Before Using These Data
Short Name & Data Access Description
v4.2 v3.4 / v3.3
ML2DGG.004 ML2DGG.003 MLS/Aura L2 Diagnostics, Geophysical Parameter Grid
ML2DGM.004 ML2DGM.003 MLS/Aura L2 Diagnostics, Miscellaneous Grid


Level 1 Radiance Products
Short Name & Data Access Description
v4.2 v3.4 / v3.3
ML1OA.004 ML1OA.003 MLS/Aura L1 Orbit/Attitude and Tangent Point Geolocation Data
ML1RADD.004 ML1RADD.003 MLS/Aura L1 Radiances from Digital Autocorrelators
ML1RADG.004 ML1RADG.003 MLS/Aura L1 Radiances from Filter Banks for GHz
ML1RADT.004 ML1RADT.003 MLS/Aura L1 Radiances from Filter Banks for THz


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Last updated: Feb 01, 2016 09:37 AM ET