| Full text | |
| Author(s): Show less - |
Souza, V. M.
[1]
;
Vieira, L. E. A.
[1]
;
Medeiros, C.
[1]
;
Da Silva, L. A.
[1]
;
Alves, L. R.
[1]
;
Koga, D.
[1]
;
Sibeck, D. G.
[2]
;
Walsh, B. M.
[3, 4]
;
Kanekal, S. G.
[2]
;
Jauer, P. R.
[1]
;
Rockenbach, M.
[1]
;
Dal Lago, A.
[1]
;
Silveira, M. V. D.
[2]
;
Marchezi, J. P.
[1]
;
Mendes, O.
[1]
;
Gonzalez, W. D.
[1]
;
Baker, D. N.
[5]
Total Authors: 17
|
| Affiliation: | [1] Inst Nacl Pesquisas Espaciais, BR-12201 Sao Jose Dos Campos - Brazil
[2] NASA, Goddard Space Flight Ctr, Greenbelt, MD - USA
[3] Boston Univ, Ctr Space Phys, Boston, MA 02215 - USA
[4] Boston Univ, Dept Mech Engn, Boston, MA 02215 - USA
[5] Univ Colorado, Atmospher & Space Phys Lab, Campus Box 392, Boulder, CO 80309 - USA
Total Affiliations: 5
|
| Document type: | Journal article |
| Source: | SPACE WEATHER-THE INTERNATIONAL JOURNAL OF RESEARCH AND APPLICATIONS; v. 14, n. 4, p. 275-284, APR 2016. |
| Web of Science Citations: | 0 |
| Abstract | |
Analysis of particle pitch angle distributions (PADs) has been used as a means to comprehend a multitude of different physical mechanisms that lead to flux variations in the Van Allen belts and also to particle precipitation into the upper atmosphere. In this work we developed a neural network-based data clustering methodology that automatically identifies distinct PAD types in an unsupervised way using particle flux data. One can promptly identify and locate three well-known PAD types in both time and radial distance, namely, 90 degrees peaked, butterfly, and flattop distributions. In order to illustrate the applicability of our methodology, we used relativistic electron flux data from the whole month of November 2014, acquired from the Relativistic Electron-Proton Telescope instrument on board the Van Allen Probes, but it is emphasized that our approach can also be used with multiplatform spacecraft data. Our PAD classification results are in reasonably good agreement with those obtained by standard statistical fitting algorithms. The proposed methodology has a potential use for Van Allen belt's monitoring. (AU) | |
| FAPESP's process: | 14/21229-9 - Numerical and observational analysis on the macroscopic aspect of the magnetic reconnection process at Earth's dayside magnetopause |
| Grantee: | Vitor Moura Cardoso e Silva Souza |
| Support type: | Scholarships in Brazil - Post-Doctorate |