BackForwardInstrument:  SEM/MEPED 

Instrument details
Acronym SEM/MEPED
Full name SEM / Medium energy proton detector
Purpose Space environment at platform level
Short description Provides both directional (nadir and 90° from nadir) and omni-directional measurements. Directional: protons are measured in 6 bands in the energy range 0.03-6.9 MeV, electrons in thee bands in the range 30-300 keV. Omni-directional: proton energy in the ranges > 16 MeV, >35 MeV, > 70 MeV and > 140 MeV
Background Part of the packages named SEM (Space Environment Monitor) until NOAA-14, and SEM/2 (Space Environment Monitor - 2) from NOAA-15 onward and on MetOp
Scanning Technique N/A (in-situ measurements)
Resolution N/A
Coverage / Cycle N/A
Mass Power Data Rate

 

Providing Agency NOAA
Instrument Maturity Flown on operational programme
Utilization Period: 1979 to ≥2019
Last update: 2017-06-05
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
  • Solar and space environment monitors
  • Energetic particle spectrometer
Mission objectives
Primary mission objectives
  • Electron integral directional flux
  • Proton integral directional flux
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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
Electron integral directional flux5 - marginalNo specific limitation.Platform environment, low and medium energy (up to 400 keV)
Proton integral directional flux5 - marginalNo specific limitation.Platform environment, low, medium and high energy (up to over 1000 keV)