BackForwardInstrument:  BCS 

Instrument details
Acronym BCS
Full name Bragg Crystal Spectrometer
Purpose Spectroscopy of solar soft X-ray
Short description Polarimeter/spectrometer to examine the radiation of individual X-ray sources in the energy range 2-8 keV for possible polarization and/or the existence of line emissions. Resolving power λ/Δλ in the range 3000-6000.
Background New development
Scanning Technique Sun pointing from a low-inclination orbit
Resolution N/A (full disk)
Coverage / Cycle Full solar disk at 1 s intervals
Mass 13 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
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 X-ray flux spectrum*2 - very highNo specific limitation.High spectral resolution, moderate dynamic range