BackForwardInstrument:  SUSIM 

Instrument details
Acronym SUSIM
Full name Solar Ultraviolet Spectral Irradiance Monitor
Purpose To monitor the spectral composition of the UV solar irradiance
Short description Double-dispersion scanning spectrometer to measure UV radiation in the spectral range 120-400 nm with a resolution of 0.1 nm
Background New development
Scanning Technique Sun pointing
Resolution N/A
Coverage / Cycle N/A
Mass Power Data Rate 2 kbps


Providing Agency NRL
Instrument Maturity Flown on an R&D satellite
Utilization Period: 1991 to 2005
Last update: 2012-09-14
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
  • Solar irradiance monitor
WIGOS Subcomponents
  • Subcomponent 2
  • Solar magnetograph, solar EUV/X-ray imagery and EUV/X-ray irradiance, both on the Earth-Sun line and off the Earth-Sun line
  • Solar UV spectrometer [from L1, GEO, LEO]
Mission objectives
Primary mission objectives
  • Downward short-wave irradiance at TOA
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
Note: * Primary mission objective.
VariableRelevance for measuring this variableOperational limitationsExplanation
Downward short-wave irradiance at TOA*5 - marginalNo specific limitation.Spectral irradiance limited to UV and VIS