BackForwardInstrument:  MLS (EOS-Aura) 

Instrument details
Acronym MLS (EOS-Aura)
Full name Microwave Limb Sounder
Purpose Chemistry of the high atmosphere. Tracked species: BrO, ClO, CO, H2O, HCl, HCN, HNO3, HO2, HOCl, N2O, O3, OH and SO2
Short description 5 bands / 36 sub-bands: 118 GHz (9 sub-bands), 190 GHz (6 sub-bands), 240 GHz (7 sub-band), 640 GHz (9 sub-bands) and 2500 GHz (5 sub-bands).
Background Follow-on of the MLS flown on UARS.
Scanning Technique Limb sounding
Resolution Vertical: 1.5 km in the altitude range 5-120 km. Horizontal effective resolution: ~ 300 km (limb geometry)
Coverage / Cycle Global coverage every 3 d for cells of 300 km side
Mass 430 kg Power 530 W Data Rate 100 kbps

 

Providing Agency NASA
Instrument Maturity Flown on an R&D satellite
Utilization Period: 2004-10-14 to ≥2020
Last update: 2018-03-19
Detailed characteristics
Satellites this instrument is flying on

Note: a red tag indicates satellites no longer operational, a green tag indicates operational satellites, a blue tag indicates future satellites

Instrument classification
  • Earth observation instrument
  • Limb sounders
  • Limb sounder
Mission objectives
Primary mission objectives
  • BrO Mole Fraction
  • ClO Mole Fraction
  • H2O Mole Fraction
  • HC3Br Mole Fraction
  • HCl Mole Fraction
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Tentative Evaluation of Measurements

The following list indicates which measurements can typically be retrieved from this category of instrument. To see a full Gap Analysis by Variable, click on the respective variable.

Note: table can be sorted by clicking on the column headers
VariableRelevance for measuring this variableOperational limitationsExplanation
Atmospheric temperature4 - fairLimited to high atmosphere.Mm-submm spectrometry in 60-3000 GHz range
BrO Mole Fraction2 - very highLimited to high atmosphere.Mm-submm spectrometry. BrO lines around 640 GHz.
HC3Br Mole Fraction4 - fairLimited to high atmosphere.Several lines of HC3Br in the 750-1200 GHz interval
ClO Mole Fraction2 - very highLimited to high atmosphere.Mm-submm spectrometry. ClO lines around 640 GHz.
Cloud ice1 - primaryLimited to high atmosphere.Mm-submm spectrometry in the 60-650 GHz range
Cloud liquid water (CLW)4 - fairLimited to high atmosphere.Mm-submm spectrometer in the 60-650 GHz range
H2O Mole Fraction4 - fairLimited to high atmosphere.Mm-submm spectrometry. H2O lines in bands 183, 325, 380, 448, 556, 752, 916, 987 GHz and others.
HCl Mole Fraction3 - highLimited to high atmosphere.Mm-submm spectrometry. HCl lines in a band around 625 GHz
HDO Mole Fraction3 - highLimited to high atmosphere.Mm-submm spectrometry. HDO lines in a band around 1000 GHz
HNO3 Mole Fraction3 - highLimited to high atmosphere.Mm-submm spectrometry. HNO3 lines in bands around 190 GHz.
N2O Mole Fraction4 - fairLimited to high atmosphere.Mm-submm spectrometry. N2O lines in bands around 300 and 500 GHz.
O3 Mole Fraction4 - fairLimited to high atmosphere.Mm-summ spectrometry. Ozone lines around 240, 300 and 500 GHz.
OH Mole fraction3 - highLimited to high atmosphere.Mm-submm spectrometry. OH lines in the band around 2500 GHz.
SO2 Mole Fraction4 - fairLimited to high atmosphere.Mm-submm spectrometry. SO2 lines in bands around 640 GHz.
Specific humidity4 - fairLimited to high atmosphere.Mm-submm spectrometry of water vapour bands at frequency up to 3000 GHz (main: around 183, 325, 380, 448, 556, 752, 916 and 987 GHz).