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ACE/SIS
STATUS
PI Instrument And Archive
AVAILABILITY
Since ACE launch August 25, 1997
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Solar Instruments
The Advanced Composition Explorer (ACE) Solar Isotope Spectrometer (SIS) provide high resolution measurements of the isotopic composition of energetic nuclei from He to Ni (Z=2 to 28) over the energy range from ~10 to ~100 MeV/nucleon.
CONTACT
Ed Stone
California Institute of Technology
1200 E. California Blvd Pasadena CA 91125
626-395-8321
ecs@srl.caltech.edu
http://www.srl.caltech.edu/personnel/ecs.html
SPECIFICATIONS
Spectral RangeN/A
Spectral ResolutionN/A
Spatial Coverage and ResolutionN/A
Temporal Resolution256 seconds
Data Accuracy5%
Data Precision5%
Physical ObservablesSolar Energetic Particle Spectra, from ~10 to ~100 MeV/nucleon.
Derived OutputsEnergetic particle fluences, for solar energetic particle events.
Concurrence OpportunitiesSTEREO, SOHO, Wind, SAMPEX
Expected LifetimeUntil spacecraft fuel runs out in ~2022
Location or OrbitL1
Capability SummaryN/A
SchedulingN/A
Archival DataVerified (Level 2)are archived at the ACE Science Center (ASC), Caltech. The ASC is the active archive for the ACE mission.
Number of UsersN/A
Planned UpgradesN/A
Sub-InstrumentsN/A
Data ProductsParticle intensities in 8 energy ranges, for He, C, N, O, Ne, Mg, Si, S, and Fe.
University FacilityYes
National Ground BasedNo
SatelliteYes
Virtual ArchiveNo
REFERENCES
The Solar Isotope Spectrometer for the Advanced Composition Explorer - In Space Science Reviews Volume 86, Nos. 1-4, 1998
REMARKS
The Solar Isotope Spectrometer (SIS) is designed to provide high resolution measurements of the isotopic composition of energetic nuclei from He to Ni (Z=2 to 28) over the energy range from ~10 to ~100 MeV/nucleon. During large solar events, when particle fluxes can increase over quiet-time values by factors of up to 10000, SIS measures the isotopic composition of the solar corona, while during solar quiet times SIS measures the isotopes of low-energy Galactic cosmic rays and the composition of the anomalous cosmic rays which are thought to originate in the nearby interstellar medium. The solar energetic particle measurements are useful to further our understanding of the Sun, while also providing a baseline for comparison with the Galactic cosmic ray measurements carried out by CRIS. SIS has a geometry factor of ~40 cm2--sr, which is significantly larger than previous satellite solar particle isotope spectrometers. It is also designed to provide excellent mass resolution during the extremely high particle flux conditions which occur during large solar particle events.
UPDATED ON
4 Dec 2009 17:34