BackForwardInstrument:  CTIM-FD 

Instrument details
Acronym CTIM-FD
Full name Compact Total Irradiance Monitor-Flight Demonstration
Purpose To demonstrate capability to measure total solar irradiance from a 6U cubesat.
Short description A total solar irradiance monitor from 200 – 2400 nm with an uncertainty of <0.01% and a stability of <0.001%/year. Utilises Carbon Absolute Electrical Substitution Radiometer.
Background New development.
Scanning Technique Sun pointing
Resolution N/A
Coverage / Cycle N/A
Mass 0.6 kg Power Data Rate


Providing Agency NASA
Instrument Maturity Flown on an R&D satellite
Utilization Period: 2022 to 2025
Last update: 2022-07-11
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 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*5 - marginalNo specific limitation.Spectral irradiance stretching to SWIR