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Instrument details
Acronym
SEM/SSJ4
Full name
SEM / Special Sensor Precipitating Electron and Ion Spectrometer - 4
Purpose
Measurement of transfer energy, mass, and momentum of charged particles through the magnetosphere-ionosphere in the Earth's magnetic field
Short description
Electrostatic analyzer for electrons protons and alpha-particles in the energy range 0.03-30 keV
Background
Part of the SEM (Space Environment Monitor) package
Scanning Technique
N/A (in-situ in the platform environment)
Resolution
N/A
Coverage / Cycle
N/A
Mass
Power
Data Rate
Providing Agency
DoD
Instrument Maturity
Flown on operational programme
Utilization Period:
1976-12-11 to 1978-03-19
Last update:
2017-06-04
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 Alpha particles differential directional flux Electron differential directional flux 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: SEM/SSJ4