BackForwardInstrument:  ACI 

Instrument details
Acronym ACI
Full name Analyzer for Cusp Ions
Purpose To observe dispersion signatures where the highest energy ions are seen at the lowest latitudes (the equatorward edge of the cusp).
Short description

ACI measures 3-D ion velocity distributions from ~10 eV to 20 keV. Every 0.3 seconds, it produces a 2-D energy spectrum over this energy range
Background

ACI has direct heritage from the TRICE-II sounding rockets
Scanning Technique

N/A
Resolution
Coverage / Cycle 0.3 s
Mass Power Data Rate

 

Providing Agency NASA
Instrument Maturity Flown on an R&D satellite
Utilization Period: 2025 to 2026
Last update: 2025-07-28
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
  • In-situ plasma probes, and energetic particle spectrometers and magnetometers at GEO and LEO, and magnetic field at GEO
  • Heavy ion sensor at LEO
Mission objectives
Primary mission objectives
  • Heavy ion angular 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.