BackForwardInstrument:  ASPEX 

Instrument details
Acronym ASPEX
Full name Aditya Solar wind Particle Experiment
Purpose To study the variation of solar wind properties as well as its distribution and spectral characteristics
Short description Composed of two sub-systems: 1) SWIS (Solar Wind Ion Spectrometer) to measure both the angular and energy distributions concurrently in addition to being able to separate protons, α-particles and heavy ions in the 100 eV to 20 keV range; and 2) STEPS (Supra Thermal Energetic Particle Spectrometer). STEPS will sample the solar wind along four different directions and study the supra-thermal particles observed in the solar wind in the 20 eV to 5 MeV range
Background New development
Scanning Technique Angular distribution measured
Resolution
Coverage / Cycle
Mass Power Data Rate

 

Providing Agency ISRO
Instrument Maturity Flown on an R&D satellite
Utilization Period: ≥2020 to ≥2025
Last update: 2018-02-18
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
Mission objectives
Primary mission objectives
  • Solar wind density
  • Solar wind temperature
  • Solar wind velocity
Secondary mission objectives
  • Alpha particles differential directional flux
  • Heavy ion angular flux energy and mass spectrum
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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
Proton differential directional flux3 - highNo specific limitation.Interplanetary space, low, medium and high energy (up to over 1000 keV)
Alpha particles differential directional flux2 - very highNo specific limitation.Interplanetary space. Low-medium energy range (<10 up to 100 MeV/n)
Solar wind density3 - highNo specific limitation.Interplanetary space. Inferred from Proton and Alpha-particle spectroscopy
Solar wind temperature3 - highNo specific limitation.Interplanetary space. Inferred from Proton and Alpha-particle spectroscopy
Solar wind velocity3 - highNo specific limitation.Interplanetary space. Inferred from Proton and Alpha-particle spectroscopy
Heavy ion flux energy and mass spectrum4 - fairNo specific limitation.Interplanetary space. Low-medium energy range (<10 up to 100 MeV/n)
Heavy ion angular flux energy and mass spectrum4 - fairNo specific limitation.Interplanetary space. Low-medium energy range (<10 up to 100 MeV/n)