Comparison of the sector and conventional spherical harmonic analyses of the solar magnetic field on the photosphere, source surface, and in the Earth’s orbit on July 10–20, 2004

The results of a spherical harmonic analysis and a sector spherical harmonic analysis of the solar magnetic field on the photosphere, source surface, and in the Earth’s orbit on July 10–20, 2004, were compared. It was found that the field values according to a sector harmonic analysis are an order o...

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Bibliographic Details
Published in:Geomagnetism and Aeronomy 2016, Vol.56 (1), p.125-128
Main Authors: Ivanov, K. G., Kharshiladze, A. F.
Format: Article
Language:English
Subjects:
Aeronomy
Earth and Environmental Science
Earth orbits
Earth Sciences
Fourier analysis
Geomagnetism
Geophysics/Geodesy
Harmonic analysis
Letter to the Editor
Magnetic fields
Photosphere
Solar magnetic field
Solar physics
Spherical harmonics
Sun
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Summary:The results of a spherical harmonic analysis and a sector spherical harmonic analysis of the solar magnetic field on the photosphere, source surface, and in the Earth’s orbit on July 10–20, 2004, were compared. It was found that the field values according to a sector harmonic analysis are an order of magnitude as large as the same values according to a spherical harmonic analysis and differ in the configuration. A twocomponent magnetic field structure was revealed: short-range sources are better described by a sector spherical harmonic analysis; long-range sources are better described by a spherical harmonic analysis. This is caused by the different depths of the occurrence of sources below the photosphere.
ISSN:0016-7932
1555-645X
0016-7940
DOI:10.1134/S0016793216010072