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Description

ML2DGG is the EOS Aura Microwave Limb Sounder (MLS) product containing geophysical diagnostic quantities pertaining directly to the standard geophysical data products, generally on a similar (or identical) grid, and at different spectral ranges. The data version is 5.0. Data coverage is from August 8, 2004 to current. Spatial coverage is near-global (-82 degrees to +82 degrees latitude), with each profile spaced 1.5 degrees or ~165 km along the orbit track (roughly 15 orbits per day). Vertical resolution varies between species and typically ranges from 3 - 6 km. Users of the ML2DGG data product should read the EOS MLS Level 2 Version 5 Quality Document for more information.

The data are stored in the version 5 EOS Hierarchical Data Format (HDF-EOS5), which is based on the version 5 Hierarchical Data Format, or HDF-5. Each file contain swaths objects for each diagnostics measurement. Each swath has a set of data and geolocation fields, swath attributes, and metadata.

Product Summary

Platforms
Aura
Instruments
MLS
Spatial Extent

N: 82 S: -82 E: 180 W: -180

Location
GLOBAL ,
MESOSPHERE ,
STRATOSPHERE ,
THERMOSPHERE ,
Troposphere
Coordinate System
CARTESIAN
Granule Spatial Representation
CARTESIAN
Temporal Extent
2004-08-02 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
C1729925131-GES_DISC
Data State
ACTIVE
Number of Files/Granules
7834
Processing Level
2
Published
Updated
Science Keywords
Atmospheric Carbon Monoxide ,
Hydrogen Cyanide ,
Methyl Cyanide ,
Bromine Monoxide ,
Chlorine Monoxide ,
Hydrogen Chloride ,
Hypochlorous Acid ,
Methanol ,
Methyl Chloride ,
Hydroperoxy ,
Hydroxyl ,
Atmospheric Nitric Acid ,
Nitrous Oxide ,
Atmospheric Ozone ,
Sulfur Dioxide ,
Atmospheric Temperature ,
Humidity ,
Water Vapor Mixing Ratio Profiles ,
Cloud Liquid Water/Ice ,
Microwave Radiance

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

Livesey, N. (2021). MLS/Aura Level 2 Diagnostics, Geophysical Parameter Grid V005 [Data set]. NASA Goddard Earth Sciences Data and Information Services Center. https://doi.org/10.5067/AURA/MLS/DATA2521 Date Accessed: 2026-03-04

Documents

USER'S GUIDE

ALGORITHM THEORETICAL BASIS DOCUMENT (ATBD)

PUBLICATIONS

Variables

The table below lists the variables contained within a single granule for this dataset. Variables often contain observed or derived geophysical measurements collected from a variety of sources, including remote sensing instruments on satellite and airborne platforms, field campaigns, in situ measurements, and model outputs. The terms variable, parameter, scientific data set, layer, and band have been used across NASA’s Earth science disciplines; however, variable is the designated nomenclature in NASA’s Common Metadata Repository (CMR). Variable metadata attributes such as Name, Description, Units, Data Type, Fill Value, Valid Range, and Scale Factor allow users to efficiently process and analyze the data. The full range of attributes may not be applicable to all variables. Additional information on variable attributes is typically available in the data, user guide, and/or other product documentation.

For questions on a specific variable, please use the Earthdata Forum.

Name Description Units Data Type Fill Value Valid Range Scale Factor
HDFEOS/SWATHS/BaselineMAFDACS23-CorePlusR2/Data Fields/BaselineMAFDACS23-CorePlusR2 BaselineMAFDACS23-CorePlusR2 vmr float32 -999.98999023438 N/A N/A
HDFEOS/SWATHS/BaselineMAFDACS23-CorePlusR2/Data Fields/BaselineMAFDACS23-CorePlusR2Precision BaselineMAFDACS23-CorePlusR2Precision vmr float32 -999.98999023438 N/A N/A
HDFEOS/SWATHS/BaselineMAFDACS23-CorePlusR2/Data Fields/Convergence BaselineMAFDACS23-CorePlusR2Convergence NoUnits float32 -999.98999023438 N/A N/A
HDFEOS/SWATHS/BaselineMAFDACS23-CorePlusR2/Data Fields/L2gpPrecision BaselineMAFDACS23-CorePlusR2Precision vmr float32 -999.98999023438 N/A N/A
HDFEOS/SWATHS/BaselineMAFDACS23-CorePlusR2/Data Fields/L2gpValue BaselineMAFDACS23-CorePlusR2 vmr float32 -999.98999023438 N/A N/A
HDFEOS/SWATHS/BaselineMAFDACS23-CorePlusR2/Data Fields/Quality BaselineMAFDACS23-CorePlusR2Quality NoUnits float32 -999.98999023438 N/A N/A
HDFEOS/SWATHS/BaselineMAFDACS23-CorePlusR2/Data Fields/Status BaselineMAFDACS23-CorePlusR2Status NoUnits int32 513 N/A N/A
HDFEOS/SWATHS/BaselineMAFDACS23-CorePlusR2/Geolocation Fields/ChunkNumber ChunkNumber NoUnits int32 -999 N/A N/A
HDFEOS/SWATHS/BaselineMAFDACS23-CorePlusR2/Geolocation Fields/Frequency Frequency GHz float32 -999.98999023438 N/A N/A
HDFEOS/SWATHS/BaselineMAFDACS23-CorePlusR2/Geolocation Fields/Latitude Latitude deg float32 -999.98999023438 N/A N/A
HDFEOS/SWATHS/BaselineMAFDACS23-CorePlusR2/Geolocation Fields/LineOfSightAngle LineOfSightAngle deg float32 -999.98999023438 N/A N/A
HDFEOS/SWATHS/BaselineMAFDACS23-CorePlusR2/Geolocation Fields/LocalSolarTime LocalSolarTime h float32 -999.98999023438 N/A N/A
HDFEOS/SWATHS/BaselineMAFDACS23-CorePlusR2/Geolocation Fields/Longitude Longitude deg float32 -999.98999023438 N/A N/A
HDFEOS/SWATHS/BaselineMAFDACS23-CorePlusR2/Geolocation Fields/OrbitGeodeticAngle OrbitGeodeticAngle deg float32 -999.98999023438 N/A N/A
HDFEOS/SWATHS/BaselineMAFDACS23-CorePlusR2/Geolocation Fields/Pressure Pressure hPa float32 -999.98999023438 N/A N/A
HDFEOS/SWATHS/BaselineMAFDACS23-CorePlusR2/Geolocation Fields/SolarZenithAngle SolarZenithAngle deg float32 -999.98999023438 N/A N/A
HDFEOS/SWATHS/BaselineMAFDACS23-CorePlusR2/Geolocation Fields/Time Time s float64 -999.98999023438 N/A N/A
HDFEOS/SWATHS/BaselineMAFDACS23-CorePlusR2/nFreqs HDFEOS/SWATHS/BaselineMAFDACS23-CorePlusR2/nFreqs N/A float32 N/A N/A N/A
HDFEOS/SWATHS/BaselineMAFDACS23-CorePlusR2/nLevels HDFEOS/SWATHS/BaselineMAFDACS23-CorePlusR2/nLevels N/A float32 N/A N/A N/A
HDFEOS/SWATHS/BaselineMAFDACS23-CorePlusR2/nTimes HDFEOS/SWATHS/BaselineMAFDACS23-CorePlusR2/nTimes N/A float32 N/A N/A N/A
HDFEOS/SWATHS/BaselineMAFDACS23-CorePlusR2/nTimesTotal HDFEOS/SWATHS/BaselineMAFDACS23-CorePlusR2/nTimesTotal N/A float32 N/A N/A N/A
HDFEOS/SWATHS/BaselineMAFDACS23-InitR2/Data Fields/BaselineMAFDACS23-InitR2 BaselineMAFDACS23-InitR2 vmr float32 -999.98999023438 N/A N/A
HDFEOS/SWATHS/BaselineMAFDACS23-InitR2/Data Fields/BaselineMAFDACS23-InitR2Precision BaselineMAFDACS23-InitR2Precision vmr float32 -999.98999023438 N/A N/A
HDFEOS/SWATHS/BaselineMAFDACS23-InitR2/Data Fields/Convergence BaselineMAFDACS23-InitR2Convergence NoUnits float32 -999.98999023438 N/A N/A
HDFEOS/SWATHS/BaselineMAFDACS23-InitR2/Data Fields/L2gpPrecision BaselineMAFDACS23-InitR2Precision vmr float32 -999.98999023438 N/A N/A
HDFEOS/SWATHS/BaselineMAFDACS23-InitR2/Data Fields/L2gpValue BaselineMAFDACS23-InitR2 vmr float32 -999.98999023438 N/A N/A
HDFEOS/SWATHS/BaselineMAFDACS23-InitR2/Data Fields/Quality BaselineMAFDACS23-InitR2Quality NoUnits float32 -999.98999023438 N/A N/A
HDFEOS/SWATHS/BaselineMAFDACS23-InitR2/Data Fields/Status BaselineMAFDACS23-InitR2Status NoUnits int32 513 N/A N/A
HDFEOS/SWATHS/BaselineMAFDACS23-InitR2/Geolocation Fields/ChunkNumber ChunkNumber NoUnits int32 -999 N/A N/A
HDFEOS/SWATHS/BaselineMAFDACS23-InitR2/Geolocation Fields/Frequency Frequency GHz float32 -999.98999023438 N/A N/A
HDFEOS/SWATHS/BaselineMAFDACS23-InitR2/Geolocation Fields/Latitude Latitude deg float32 -999.98999023438 N/A N/A
HDFEOS/SWATHS/BaselineMAFDACS23-InitR2/Geolocation Fields/LineOfSightAngle LineOfSightAngle deg float32 -999.98999023438 N/A N/A
HDFEOS/SWATHS/BaselineMAFDACS23-InitR2/Geolocation Fields/LocalSolarTime LocalSolarTime h float32 -999.98999023438 N/A N/A
HDFEOS/SWATHS/BaselineMAFDACS23-InitR2/Geolocation Fields/Longitude Longitude deg float32 -999.98999023438 N/A N/A
HDFEOS/SWATHS/BaselineMAFDACS23-InitR2/Geolocation Fields/OrbitGeodeticAngle OrbitGeodeticAngle deg float32 -999.98999023438 N/A N/A
HDFEOS/SWATHS/BaselineMAFDACS23-InitR2/Geolocation Fields/Pressure Pressure hPa float32 -999.98999023438 N/A N/A
HDFEOS/SWATHS/BaselineMAFDACS23-InitR2/Geolocation Fields/SolarZenithAngle SolarZenithAngle deg float32 -999.98999023438 N/A N/A
HDFEOS/SWATHS/BaselineMAFDACS23-InitR2/Geolocation Fields/Time Time s float64 -999.98999023438 N/A N/A
HDFEOS/SWATHS/BaselineMAFDACS23-InitR2/nFreqs HDFEOS/SWATHS/BaselineMAFDACS23-InitR2/nFreqs N/A float32 N/A N/A N/A
HDFEOS/SWATHS/BaselineMAFDACS23-InitR2/nLevels HDFEOS/SWATHS/BaselineMAFDACS23-InitR2/nLevels N/A float32 N/A N/A N/A
HDFEOS/SWATHS/BaselineMAFDACS23-InitR2/nTimes HDFEOS/SWATHS/BaselineMAFDACS23-InitR2/nTimes N/A float32 N/A N/A N/A
HDFEOS/SWATHS/BaselineMAFDACS23-InitR2/nTimesTotal HDFEOS/SWATHS/BaselineMAFDACS23-InitR2/nTimesTotal N/A float32 N/A N/A N/A
HDFEOS/SWATHS/BaselineMAFDACS24-CorePlusR3/Data Fields/BaselineMAFDACS24-CorePlusR3 BaselineMAFDACS24-CorePlusR3 vmr float32 -999.98999023438 N/A N/A
HDFEOS/SWATHS/BaselineMAFDACS24-CorePlusR3/Data Fields/BaselineMAFDACS24-CorePlusR3Precision BaselineMAFDACS24-CorePlusR3Precision vmr float32 -999.98999023438 N/A N/A
HDFEOS/SWATHS/BaselineMAFDACS24-CorePlusR3/Data Fields/Convergence BaselineMAFDACS24-CorePlusR3Convergence NoUnits float32 -999.98999023438 N/A N/A
HDFEOS/SWATHS/BaselineMAFDACS24-CorePlusR3/Data Fields/L2gpPrecision BaselineMAFDACS24-CorePlusR3Precision vmr float32 -999.98999023438 N/A N/A
HDFEOS/SWATHS/BaselineMAFDACS24-CorePlusR3/Data Fields/L2gpValue BaselineMAFDACS24-CorePlusR3 vmr float32 -999.98999023438 N/A N/A
HDFEOS/SWATHS/BaselineMAFDACS24-CorePlusR3/Data Fields/Quality BaselineMAFDACS24-CorePlusR3Quality NoUnits float32 -999.98999023438 N/A N/A
HDFEOS/SWATHS/BaselineMAFDACS24-CorePlusR3/Data Fields/Status BaselineMAFDACS24-CorePlusR3Status NoUnits int32 513 N/A N/A
HDFEOS/SWATHS/BaselineMAFDACS24-CorePlusR3/Geolocation Fields/ChunkNumber ChunkNumber NoUnits int32 -999 N/A N/A
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