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Instrument details
Acronym
MEP-i
Full name
Medium-energy particle experiments - ion mass analyzer
Purpose
Measurement of medium-energy ions through the magnetosphere, specifically the Van Allen belts
Short description
Spectrometer to observe ions in the energy range 10-200 keV. Detailed description not yet available
Background
Part of a package to measure low, medium, high and extremely-high energy electrons (LEP-e, MEP-e, HEP-e and XEP-e) and low and medium energy ions (LEP-i and MEP-i)
Scanning Technique
Volumetric exploration of the magnetosphere as the satellite travels along the HEO with perigee 300 km and apogee 30,000 km whilst spinning at 1 round / 8 s
Resolution
Coverage / Cycle
Full magnetospheric volume, more frequently in low-middle latitudes, consistently with the 31° orbital inclination
Mass
Power
Data Rate
Providing Agency
JAXA
Instrument Maturity
Flown on an R&D satellite
Utilization Period:
2017 to ≥2022
Last update:
2021-12-16
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 2 Proton sensor [cross magnetosphere] Alpha-particle sensor [cross magnetosphere] Heavy ion sensor [cross magnetosphere] Subcomponent 3 Heavy ions mass spectrometer [from LEO and HEO]
Mission objectives
Primary mission objectives Alpha particles differential directional flux Heavy ion flux energy and mass spectrum Proton differential directional flux Show all Show fewer
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
Instrument: MEP-i