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Instrument details
Acronym
SWEAPI
Full name
Solar Wind Electrons Alphas and Protons Investigation
Purpose
To count the most abundant particles in the solar wind: electrons, protons and helium ions; and measure their properties.
Short description
Particle counters, and a special cup to catch some of the particles for direct analysis. Energy range: 3-30000 keV (electrons), 2-10000 keV (protons) and 80-400000 keV (alpha-particles)
Background
Consolidated technique
Scanning Technique
Sun pointing from a solar orbit
Resolution
N/A (full disk)
Coverage / Cycle
Full solar disk, nearly continuous
Mass
Power
Data Rate
Providing Agency
NASA
Instrument Maturity
Flown on an R&D satellite
Utilization Period:
2018 to ≥2025
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 Electron sensor [at solar orbit, ecliptic, L5] Proton sensor [at solar orbit, ecliptic, L5] Alpha-particle sensor [at solar orbit, ecliptic, L5] Solar wind density sensor [at solar orbit, ecliptic, L5] Solar wind temperature sensor [at solar orbit, ecliptic, L5] Solar wind velocity sensor [at solar orbit, ecliptic, L5] Subcomponent 3 Electron sensor [from solar orbit, ecliptic, L5] Proton sensor [from solar orbit, ecliptic, L5] Alpha-particle sensor [from solar orbit, ecliptic, L5] Solar wind density sensor [from solar orbit, ecliptic, L5] Solar wind temperature sensor [from solar orbit, ecliptic, L5] Solar wind velocity sensor [from solar orbit, ecliptic, L5]
Mission objectives
Primary mission objectives Alpha particles differential directional flux Electron differential directional flux Proton differential directional flux Secondary mission objectives Solar wind density Solar wind temperature 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: SWEAPI