BackForwardInstrument:  HENA 

Instrument details
Acronym HENA
Full name High-Energy Neutral-Atom Imager
Purpose To detect Energetic Neutral Atoms (ENA) imaging the ring current, inner plasma sheet, and substorm injection boundary
Short description Slit-type imager measuring the velocity of the ENAs that it detects by measuring their time of flight (TOF) and trajectory through the sensor. Energy range 10-500 keV
Background New development. Working in association with LENA for low-energy and MENA for medium-energy
Scanning Technique Volumetric exploration of the magnetosphere as the satellite moves along a polar Highly Eliptical Orbit.
Resolution N/A
Coverage / Cycle Magnetospheric volume
Mass Power Data Rate


Providing Agency NASA
Instrument Maturity Flown on an R&D satellite
Utilization Period: 2000 to 2005-12-15
Last update: 2017-06-01
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 No WIGOS subcomponents have been defined.
Mission objectives
Primary mission objectives
  • Energetic Neutral Atom (ENA)
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Tentative 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
VariableRelevance for measuring this variableOperational limitationsExplanation
Energetic Neutral Atom (ENA)2 - very highNo specific limitation.Interplanetary space, high energy (over 10000 up to 1000000 eV)