BackForwardInstrument:  Libera 

Instrument details
Acronym Libera
Full name Libera
Purpose Earth radiation budget
Short description

Broadband radiometer to cover the shortwave range 0.3-5.0 μm, the LW range 5-50 μm and the total range 0.3-100 μm. An additional channel, 0.7-5.0 μm, enables splitting the SW range. Details not yet available.


Follow-on of CERES flown in different configurations on TRMM, EOS-Terra, EOS-Aqua, SNPP and JPSS-1/NOAA-20.

Scanning Technique

Details not yet available.

Coverage / Cycle
Mass Power Data Rate


Providing Agency NASA
Instrument Maturity Flown on operational programme
Utilization Period: TBD
Last update: 2024-02-14
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
  • Broadband Earth radiation radiometer
WIGOS Subcomponents
  • Subcomponent 1
  • Absolutely calibrated broadband radiometers, and TSI and SSI radiometers
  • Broadband radiometer (for ERB)
Mission objectives
Primary mission objectives
  • Upward long-wave irradiance at TOA
  • Upward 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
Upward short-wave irradiance at TOA*2 - very highInformation on BRDF needed.SW and LW broadband channels, and supporting narrow-bandwidth channels for cloud detection
Upward long-wave irradiance at TOA*1 - primaryNo specific limitation.SW, LW and Total (SW+LW) broadband channels