Data · collection · 1997
Advanced Composition Explorer (ACE) Solar Isotope Spectrometer (SIS) Level 2 Data
Listed in NASA Earthdata CMR
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.
Description
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.
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SIS level 2 data is organized into 27-day time periods (Bartels Rotations - roughly one solar rotation period). For each Bartels Rotation, the level 2 data contains time averages of energetic charged particle fluxes over the following time periods: - 256 seconds - hourly - daily - 27 days (1 Bartels rotation) Currently, flux data are available for 8 elements, in units of particles/(cm2 Sr sec MeV/nucleon), in eight energy ranges.
The energy ranges are different for each element. The elements for which data are available are: - He, C, N, O, Ne, Mg, Si, S, and Fe. See: srl.caltech.edu/ACE/ASC/level2/sis_l2desc.html
Links
Get the data
- ACE SIS Level 2 Data srl.caltech.edu/ACE/ASC/level2/lvl2DATA_SIS.html ↗
download · from NASA CMR
Documentation and papers
- ACE SIS Level 2 Documentation srl.caltech.edu/ACE/ASC/level2/sis_l2desc.html ↗
documentation · from NASA CMR
- ACE Project Home Page srl.caltech.edu/ACE ↗
project · from NASA CMR
Catalogue records · 2
- CMR record cmr.earthdata.nasa.gov/search/concepts/C1214614863-SCIOPS.html ↗
catalogue entry · from NASA CMR
- CMR UMM-JSON cmr.earthdata.nasa.gov/search/concepts/C1214614863-SCIOPS.umm_json ↗
metadata API · from NASA CMR
Topics
- Stated by source
- Advanced Composition Explorer (ACE) · Alpha Particle Flux · Corona · Cosmic Rays · Electron Flux · Ion Flux · Particle Composition · Particle Speed · Proton Flux · Solar Isotope Spectrometer
- Inferred from text
- Geochemistry 72%
Provenance · 1 source records, 18 field assertions
| Source | Key | Last seen | Raw |
|---|---|---|---|
| NASA Earthdata CMR | C1214614863-SCIOPS | 12 d ago | JSON v1 |
| Field | Assertion | Extractor | Evidence |
|---|---|---|---|
| access_level | source · NASA CMR | connector:nasa_cmr@1.0.0 | |
| concepts[field].anzsrc:group:3703 | enrichment · NASA CMR | taxonomy-embedding@1.1.0 | title+keywords+description (72%) |
| concepts[instrument].gcmd_instrument:sis | source · NASA CMR | connector:nasa_cmr@1.0.0 | |
| concepts[measured_variable].gcmd:earth-science/sun-earth-interactions/solar-activity/corona | source · NASA CMR | connector:nasa_cmr@1.0.0 | |
| concepts[measured_variable].gcmd:earth-science/sun-earth-interactions/solar-activity/cosmic-rays | source · NASA CMR | connector:nasa_cmr@1.0.0 | |
| concepts[measured_variable].gcmd:earth-science/sun-earth-interactions/solar-energetic-particle-flux/alpha-particle-flux | source · NASA CMR | connector:nasa_cmr@1.0.0 | |
| concepts[measured_variable].gcmd:earth-science/sun-earth-interactions/solar-energetic-particle-flux/electron-flux | source · NASA CMR | connector:nasa_cmr@1.0.0 | |
| concepts[measured_variable].gcmd:earth-science/sun-earth-interactions/solar-energetic-particle-flux/ion-flux | source · NASA CMR | connector:nasa_cmr@1.0.0 | |
| concepts[measured_variable].gcmd:earth-science/sun-earth-interactions/solar-energetic-particle-flux/proton-flux | source · NASA CMR | connector:nasa_cmr@1.0.0 | |
| concepts[measured_variable].gcmd:earth-science/sun-earth-interactions/solar-energetic-particle-properties/particle-composition | source · NASA CMR | connector:nasa_cmr@1.0.0 | |
| concepts[measured_variable].gcmd:earth-science/sun-earth-interactions/solar-energetic-particle-properties/particle-speed | source · NASA CMR | connector:nasa_cmr@1.0.0 | |
| concepts[platform].gcmd_platform:ace | source · NASA CMR | connector:nasa_cmr@1.0.0 | |
| description | source · NASA CMR | connector:nasa_cmr@1.0.0 | /umm/Abstract |
| publication_date | source · NASA CMR | connector:nasa_cmr@1.0.0 | |
| spatial | source · NASA CMR | connector:nasa_cmr@1.0.0 | /umm/SpatialExtent |
| temporal | source · NASA CMR | connector:nasa_cmr@1.0.0 | /umm/TemporalExtents |
| title | source · NASA CMR | connector:nasa_cmr@1.0.0 | /umm/EntryTitle |
| version_label | source · NASA CMR | connector:nasa_cmr@1.0.0 |