BackForwardInstrument:  SEP/HEPS 

Instrument details
Acronym SEP/HEPS
Full name Space Environment Package / High Energy Particles Sensor
Purpose Space weather - Monitoring charged particles at platform level
Short description
  • Set of counters for electrons (0.4-4 MeV) and protons (1-165 MeV) [see details below]
  • Calibration monitoring here
Background

Component of the Space Environment Package (SEP) for FY-4A & B. Replaces SEM on FY-2 A to H.
Scanning Technique

N/A (in-situ in the platform environment)
Resolution N/A
Coverage / Cycle Field of view 60° (protons) and 25° (electrons)
Mass Power Data Rate

 

Providing Agency CMA
Instrument Maturity Flown on operational programme
Utilization Period: 2017 to 2040
Last update: 2024-09-09
Detailed characteristics
Sensors Nb of directions FY-4A/B  Energy Ranges
High-energy Proton 3 / 3 1 to 165 MeV  >165 MeV
High-energy Electron 9 / 3 0.4 - 4 MeV
Medium-energy Proton 0 / 15 0.03 - 1 MeV
Medium energy Electron 0 / 15 0.03 - 0.6 MeV
Low energy Ion 0 / 1 0.1 - 40 keV
Low energy Electron 0 / 1 0.1 - 40 keV
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
  • Electron sensor at GEO
  • Proton sensor at GEO
Mission objectives
Primary mission objectives
  • Electron integral directional flux
  • Heavy ion differential directional flux
  • Proton integral directional flux
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.
VariableRelevance for measuring this variableOperational limitationsExplanation
Electron integral directional flux*5 - marginalNo specific limitation.Platform environment, medium and high energy (over 40 to over 400 keV)
Proton integral directional flux*5 - marginalNo specific limitation.Platform environment, medium and high energy (over 40 to over 1000 keV)