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NISCAIR ONLINE PERIODICALS REPOSITORY (NOPR) >
NISCAIR PUBLICATIONS >
Research Journals >
Indian Journal of Radio & Space Physics (IJRSP) >
IJRSP Vol.41 [2012] >
IJRSP Vol.41(3) [June 2012] >
| Title: | Artificial neural network (ANN) for modelling earth’s magnetic field belonging to solar minimum observed at a low latitude station Alibag |
| Authors: | Unnikrishnan, K |
| Keywords: | Artificial neural network
Earth’s magnetic field
Solar minimum
Geomagnetic daily variation model |
| Issue Date: | Jun-2012 |
| Publisher: | NISCAIR-CSIR, India |
| PACS No.: | 84.35.+i; 91.25.Rt; 96.60.qd |
| Abstract: | Artificial neural networks (ANNs) are well
suited to environmental modelling as they are nonlinear, relatively insensitive
to data noise, and perform reasonably well when limited data are available. By
using solar flux (F10.7), day of the year, local time, and Ap as input, an
appropriate ANN has been developed to model north-south component (X component)
of earth’s magnetic field belonging to solar minimum period for Alibag (18.6°N,
72.87°E, geomagnetic latitude 10.37°N), a low latitude station of Indian
sub-continent. For training the network three months, namely February, June, and
September, were selected which represent three seasons winter, summer, and
equinox, respectively of 2007 and 2008. Based on this analysis, it is observed
that ANN model with 10 hidden neurons has good performance for 500 iterations.
For testing the efficiency of ANN, hourly values of input and north-south
component (X component) of earth’s magnetic field observed during January,
October 2007 and May 2008 were used. To confirm the functional aspects of this
model, similar investigations were carried out for other periods, January,
October 2008, and May 2007. In this study, for the first time, artificial
neural networks (ANNs) are utilised to develop a geomagnetic daily variation
model for an Indian sub-continent station, Alibag. |
| Page(s): | 359-366 |
| CC License: |  CC Attribution-Noncommercial-No Derivative Works 2.5 India |
| ISSN: | 0975-105X (Online); 0367-8393 (Print) |
| Source: | IJRSP Vol.41(3) [June 2012]
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