BackForwardInstrument:  SWIS/STIS 

Instrument details
Full name Space Weather Instrument Suite / SupraThermal Ion Sensor
Purpose To easure fast ions in the solar wind to improve forecasts of solar wind arrival time at Earth
Short description Measures the ion distribution above the average energy. 15 channels spanning 15-2,000 keV
Background Heritage from research and operational instruments
Scanning Technique N/A (in-sity measurement)
Resolution N/A (insitu measurement)
Coverage / Cycle 5 min
Mass 5 kg Power 5 W Data Rate 1 kbps


Providing Agency NASA
Instrument Maturity Backed by strong heritage
Utilization Period: 2025 to 2033
Last update: 2021-10-02
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
  • Energetic particle spectrometer
WIGOS Subcomponents
  • Subcomponent 1
  • Solar wind in situ plasma and energetic particles, magnetic field, at L1
  • Solar wind at L1 - Heavy ion sensor
Mission objectives
Primary mission objectives
  • Heavy ion flux energy and mass 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
Heavy ion flux energy and mass spectrum*4 - fairNo specific limitation.Interplanetary space. Low-medium energy range (<10 up to 100 MeV/n)