BackForwardInstrument:  WBS 

Instrument details
Acronym WBS
Full name Wide-band Spectrometer
Purpose Spectrometry of Sun X and gamma rays
Short description Assemblage of three spectrometers for the ranges 2-30 keV (soft X-rays), 20-400 keV (hard X-rays) and 0.2-100 MeV (gamma-rays).
Background New development
Scanning Technique Sun pointing from a low-inclination LEO
Resolution N/A (full disk)
Coverage / Cycle Full solar disk at 1s intervals
Mass 16 kg Power Data Rate


Providing Agency JAXA
Instrument Maturity Flown on an R&D satellite
Utilization Period: 1991 to 2001-12-15
Last update: 2017-05-19
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
  • Solar and space environment monitors
  • Solar activity monitor
WIGOS Subcomponents No WIGOS subcomponents have been defined.
Mission objectives
Primary mission objectives
  • Solar X-ray flux spectrum
  • Solar gamma-ray flux spectrum
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
Solar gamma-ray flux spectrum*1 - primaryNo specific limitation.Wide dynamic range, associated to X-ray observation
Solar X-ray flux spectrum*1 - primaryNo specific limitation.High spectral resolution, wide dynamic range