Data · collection · 1997
Advanced Composition Explorer (ACE) CRIS Level 2 Data
Listed in NASA Earthdata CMR
The Cosmic Ray Isotope Spectrometer (CRIS) on the Advanced Composition Explorer (ACE) spacecraft is intended to be a major step in ascertaining the isotopic composition of the Galactic Cosmic Rays and hence a major step in determining their origin.
Description
The GCRs (Galactic Cosmic Rays) consist, by number, primarily of hydrogen nuclei (~92%) and He nuclei (~7%). The heavier nuclei (1%) provide most of the information about cosmic-ray origin through their elemental and isotopic composition.
The intensities of these heavy cosmic rays are very low and progress in the past has been impeded by limited particle collection power, particularly regarding individual isotopes. CRIS is designed to have far greater collection power (~250 cm2*sr) than previous satellite instruments (< 10 cm2*sr) while still maintaining excellent isotopic resolution through Z=30 (Zinc) and beyond. CRIS level 2 data is organized into 27-day time periods (Bartels Rotations - roughly one solar rotation period).
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For each Bartels Rotation, the level 2 data contains time averages of energetic charged particle fluxes over the following time periods: - hourly - daily - 27 days (1 Bartels rotation) Currently, flux data are available for 24 elements, in units of particles/(cm2*sr*sec*Mev/nucleon), in seven energy ranges. The energy ranges are different for each element. The elements for which data are available are: - B, C, N, O, F, Ne, Na, Mg, Al, Si, P, S, Cl, Ar, K, Ca, Sc, Ti, V, Cr, Mn, Fe, Co, Ni See: srl.caltech.edu/ACE/ASC/level2/cris_l2desc.html
Links
Get the data
- ACE CRIS Level 2 Data srl.caltech.edu/ACE/ASC/level2/lvl2DATA_CRIS.html ↗
download · from NASA CMR
- ACE CRIS Level 2 Documentation srl.caltech.edu/ACE/ASC/level2/cris_l2desc.html ↗
download · from NASA CMR
Documentation and papers
- ACE Project Home Page srl.caltech.edu/ACE ↗
project · from NASA CMR
Catalogue records · 2
- CMR record cmr.earthdata.nasa.gov/search/concepts/C1214614848-SCIOPS.html ↗
catalogue entry · from NASA CMR
- CMR UMM-JSON cmr.earthdata.nasa.gov/search/concepts/C1214614848-SCIOPS.umm_json ↗
metadata API · from NASA CMR
Topics
Provenance · 1 source records, 16 field assertions
| Source | Key | Last seen | Raw |
|---|---|---|---|
| NASA Earthdata CMR | C1214614848-SCIOPS | 13 d ago | JSON v1 |
| Field | Assertion | Extractor | Evidence |
|---|---|---|---|
| access_level | source · NASA CMR | connector:nasa_cmr@1.0.0 | |
| concepts[instrument].gcmd_instrument:cris | source · NASA CMR | connector:nasa_cmr@1.0.0 | |
| concepts[measured_variable].gcmd:earth-science/sun-earth-interactions/ionosphere-magnetosphere-dynamics/ion-chemistry-ionization | source · NASA CMR | connector:nasa_cmr@1.0.0 | |
| concepts[measured_variable].gcmd:earth-science/sun-earth-interactions/solar-activity/cosmic-rays/composition | 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/heavy-nuclei-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[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 |