BackForwardInstrument:  SXT 

Instrument details
Acronym SXT
Full name Soft X-ray Telescope
Purpose To monitor solar soft X-rays
Short description Grazing incidence reflecting soft X-ray mirror followed by an X-ray CCD detector in the energy range 0.25-3 keV
Background New development
Scanning Technique Sun pointing from a low-inclination orbit, imaging by a CCD array
Resolution 1700 km at Sun surface
Coverage / Cycle Full solar disk at 0.5 s intervals
Mass 27 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 X-ray image
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*1 - primaryNo specific limitation.High spectral resolution, wide dynamic range
Solar X-ray image*1 - primaryNo specific limitation.Spectrometry with high spatial resolution