BackForwardInstrument:  ERBR 

Instrument details
Acronym ERBR
Full name Earth Radiation Budget Radiometer
Purpose Earth radiation budget
Short description Two channels, total spectum and shortwave component [see detailed characteristics below]
Background New development
Scanning Technique Mechanical, 3-axis stabilised satellite, E-W continuous, S-N stepping
Resolution 50 km
Coverage / Cycle 5 min
Mass Power Data Rate


Providing Agency Roscosmos
Instrument Maturity Flown on operational programme
Utilization Period: 2031 to 2045
Last update: 2021-06-14
Detailed characteristics
Channel Spectral interval Noise Equivalent Radiance Absolute accuracy SNR


0.32 - 4.0 µm ...... W m-2 sr-1 ...... W m-2 sr-1 ,,,,,,,

Total radiance

0.32 - 30 µm …… W m-2 sr-1 ...... W m-2 sr-1 .......
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 Total (SW+LW) broadband channels. Frequent sampling (GEO) enable capturing diurnal variations, particularly due to clouds. Also, changing solar incidence angle helps with irradiance computation
Upward long-wave irradiance at TOA*2 - very highNo specific limitation.LW radiance achieved by difference between Total and SW. Frequent sampling (GEO) enable capturing diurnal variations due to clouds.and water vapour rapid evolution