BackForwardInstrument:  HXIS 

Instrument details
Acronym HXIS
Full name Hard X-Ray Imaging Spectrometer
Purpose Study of the energy problem associated with hard X-ray generating electrons; and study of flare models and mechanisms
Short description Imaging collimator of ten grid plates, each divided into 576 sections, and a position-sensitive detector system consisting of 900 mini-proportional counters. Each pixel is sampled in six energy bands in the range 3.5-30 keV, with time resolution down to 1.25 s
Background New development
Scanning Technique Sun pointing from a low-inclination LEO. Field of view 6.35 arcmin in extent and 2.67 arcmin across
Resolution 6000 km at Sun surface
Coverage / Cycle Full solar disk at 1.25 s intervals
Mass Power Data Rate


Providing Agency NIVR
Instrument Maturity Flown on an R&D satellite
Utilization Period: 1980 to 1989
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
  • Subcomponent 2
  • Solar magnetograph, solar EUV/X-ray imagery and EUV/X-ray irradiance, both on the Earth-Sun line and off the Earth-Sun line
  • Solar X-ray imager [from L1, GEO, LEO]
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*2 - very highNo specific limitation.High spectral resolution, moderate dynamic range
Solar X-ray image*2 - very highNo specific limitation.Spectrometry with coarse spatial resolution