Mewaldt, R. A. and Cummings, A. C. and Cummings, J. R. and Stone, E. C. and Klecker, B. and Hovestadt, D. and Scholer, M. and Mason, G. M. and Mazur, J. E. and Hamilton, D. C. and von Rosenvinge, T. T. and Blake, J. B.
(1993)
The Return of the Anomalous Cosmic Rays to 1 AU in 1992.
Geophysical Research Letters, 20
(20).
pp. 2263-2266.
ISSN 0094-8276.
doi:10.1029/93GL02493.
https://resolver.caltech.edu/CaltechAUTHORS:20140520-091404026
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Abstract
New observations of low energy (approximately 1 to 200 MeV/nuc) cosmic rays measured by three newly launched experiments on Solar, Anomalous, and Magnetospheric Particle Explorer (SAMPEX) during 1992 and 1993 show the strong presence of anomalous cosmic ray (ACR) nitrogen and oxygen, well before the approaching solar minimum. When compared with ACR temporal variations over the past two solar cycles we find that the 1992-1993 fluxes are approximately 5 to 10 times their level at corresponding neutron monitor counting rates in 1969-1970 and 1985
| Item Type: | Article |
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| Additional Information: | Copyright 1993 by the American Geophysical Union.
Received August 12, 1993; accepted August 23, 1993.
We are grateful to J. Labonte and J.
Lockwood for providing unpublished Mt. Washington
neutron monitor data and to J. T. Hoeksema for providing unpublished data on the neutral sheet slit. This work was supported by NASA under contract NAS5-30704, grant
NAGW- 1919, and NASA Cooperative Agreement 26979B at
The Aerospace Corporation. Work at the Max-Planck
Institut was funded by the Bundesministefiumfur Forschung
und Technologie, FRG, under contract 50 OC 90021. |
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| Group: | Space Radiation Laboratory |
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| Funders: | | Funding Agency | Grant Number |
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| NASA | NAS5-30704 | | NASA | NAGW- 1919 | | JPL | 26979B | | Bundesministerium für Forschung und Technologie (BMFT) | 50 OC 90021 |
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| Non-Subject Keywords: | : Anomalies, Concentration (Composition), Cosmic Rays, Earth Orbits, Nitrogen, Oxygen, Satellite Observation, Solar Flux, Spaceborne Astronomy, Annual Variations, Mass Spectrometers, Radiation Counters, Solar Cycles, Spaceborne Telescopes, Temporal Distribution, Time Series Analysis |
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| Other Numbering System: | | Other Numbering System Name | Other Numbering System ID |
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| Space Radiation Laboratory | 1993-32 |
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| Issue or Number: | 20 |
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| DOI: | 10.1029/93GL02493 |
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| Record Number: | CaltechAUTHORS:20140520-091404026 |
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| Persistent URL: | https://resolver.caltech.edu/CaltechAUTHORS:20140520-091404026 |
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| Usage Policy: | No commercial reproduction, distribution, display or performance rights in this work are provided. |
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| ID Code: | 45834 |
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| Collection: | CaltechAUTHORS |
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| Deposited By: |
Deborah Miles
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| Deposited On: | 28 May 2014 18:26 |
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| Last Modified: | 10 Nov 2021 17:17 |
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