BackForwardInstrument:  SME (IR) 

Instrument details
Acronym SME (IR)
Full name SME-Infrared Radiometer
Purpose To determine the mixing ratio profiles for water and ozone from thermal emissions. Also pressure and temperature profiles were determined between 20 and 70 km.
Short description A 4 channel radiometer had the following spectral ranges (in micrometers): 17.2 to 13.2, 15.7 to 14.7, 10.6 to 8.6, and 7.2 to 6.1. The full widths at half-maximum were 4.0, 1.0, 2.0, and 1.1 micrometers, respectively.
Background Part of the NASA space weather measurement programme.
Scanning Technique
Coverage / Cycle
Mass Power Data Rate


Providing Agency NASA
Instrument Maturity Flown on an R&D satellite
Utilization Period: 1981 to 1989
Last update: 2023-05-15
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
  • Passive optical radiometer or spectrometer
  • Cross-nadir infrared sounder, possibly including VIS channels
WIGOS Subcomponents No WIGOS subcomponents have been defined.
Mission objectives
Primary mission objectives
  • H2O
  • O3
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.

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Note: * Primary mission objective.