BackForwardInstrument:  PREMOS 

Instrument details
Acronym PREMOS
Full name Precision Monitoring of Solar variability
Purpose Sun observation, Space weather - Monitoring from a terrestrial orbit by measuring solar spectral irradiance, at selected wavelengths, and total solar irradiance.
Short description Total Solar Irradiance by absolute differential radiometer. Solar Spectral Irradiance by three 4-channel filter radiometers providing measurements in 6 channels : three in UV corresponding to the spectral domains specific of the ozone photochemistry, one in VIS and two in IR
Background New development
Scanning Technique Sun pointing
Resolution N/A
Coverage / Cycle Near-continuous from the dawn-dusk orbit
Mass 11 kg Power 13 W Data Rate 0.7 kbps


Providing Agency CNES
Instrument Maturity Flown on an R&D satellite
Utilization Period: 2010 to 2014
Last update: 2021-09-29
Detailed characteristics
Central wavelength Spectral interval SNR or NEΔT @ specified input
210 nm
215 nm
268 nm
535 nm
607 nm
782 nm
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 1
  • Absolutely calibrated broadband radiometers, and TSI and SSI radiometers
  • TSI and SSI radiometers (for solar irradiance)
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*4 - fairNo specific limitation.TSI over the range UV, VIS and part of NIR