THE CEOS DATABASE : Missions, Instruments and Measurements
CEOS EO HANDBOOK – INSTRUMENT SUMMARY - MLS (EOS-Aura) -
Full Name Microwave Limb Sounder (EOS-Aura) Status Operational
Instrument Agencies NASA Maturity
Instrument Type Atmospheric temperature and humidity sounders Geometry Limb-scanning
Instrument Technology Limb-scanning MW spectrometer Sampling Sounding
Data Access Open Access Data Format HDF-EOS
Measurements and Applications Measures lower stratospheric temperature and concentration of H2O, O3, ClO, HCl, OH, HNO3, N2O and SO2.
Resolution Summary 3 x 300 km horizontal x 1.2 km vertical
Swath Summary Limb scan 2.5 - 62.5 km Limb to limb
[Max Swath: 62 km]
Accuracy Summary Temperature: 4 K, Ozone: 50%
Waveband Summary Microwave: 118 GHz, 190 GHz, 240 GHz, 640 GHz and 2.5 THz
MW (~1.0 cm - ~100 cm)
Instrument Measurements
CategoryParameterAccuracy
Atmospheric Humidity FieldsAtmospheric specific humidity (HT, LS, HS&M) 
Atmospheric Temperature FieldsAtmospheric temperature (HT, LS, HS&M) 
Cloud particle properties and profileCloud ice content (at cloud top) 
OzoneOzone profile 
Trace gases (excluding ozone)Atmospheric Chemistry - CO (column/profile) 
Atmospheric Chemistry - OH (column/profile) 
Atmospheric Chemistry - N2O (HT, LS) 
Atmospheric Chemistry - HNO3 (HT, LS) 
Atmospheric Chemistry - HCl (HT, LS) 
Atmospheric Chemistry - BrO (HT, LS, HS&M) 
Atmospheric Chemistry - ClO (HT, LS, HS&M) 
Atmospheric Chemistry - SO2 (column/profile) 
Instrument Missions
Aura - Aura (formerly EOS Chemistry) (2004 - 2017)
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