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Instrument details
Acronym
SIS
Full name
Solar Isotope Spectrometer
Purpose
To measure elemental and isotopic composition of solar energetic particles, anomalous cosmic rays, and interplanetary particles from H to Zn
Short description
Z range: 1 to 30. Measurements are performed by a technique considering a particle's energy loss ΔE in a detector (multiple ΔE versus residual energy E). Energy range: 4-200 MeV/nucleon for Z > 2, 3.5-40 for alpha-particles, 7-20 for protons
Background
Part of a package of instruments for solar observation
Scanning Technique
Sun pointing from the L1 Lagrange libration point
Resolution
N/A (full disk)
Coverage / Cycle
Full Sun disk, nearly continuous
Mass
20.6 kg
Power
21.5 W
Data Rate
2 kbps
Providing Agency
NASA
Instrument Maturity
Flown on an R&D satellite
Utilization Period:
1997 to ≥2027
Last update:
2021-11-10
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 1 Solar wind at L1 - Proton sensor Solar wind at L1 - Alpha-particle sensor Solar wind at L1 - Heavy ion sensor Solar wind at L1 - Plasma density sensor Solar wind at L1 - Plasma temperature sensor Solar wind at L1 - Plasma velocity sensor
Mission objectives
Primary mission objectives Alpha particles differential directional flux Heavy ion flux energy and mass spectrum 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: SIS