A method for the interpretation of three-dimensional equatorial GDV fields

The equatorial GDV fields have been widely measured in North-South magnetometer chains and the data so obtained interpreted by assuming that these variations are bi-dimensional. This hypothesis limits its application to the inference of the noon amplitude of the ionospheric current and to the case o...

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Autores principales: Duhau, S., Martínez, E.A.
Formato: JOUR
Materias:
geomagnetic variation
Acceso en línea:http://hdl.handle.net/20.500.12110/paper_13438832_v50_n2_p141_Duhau
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Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
id todo:paper_13438832_v50_n2_p141_Duhau
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spelling todo:paper_13438832_v50_n2_p141_Duhau2023-10-03T16:09:46Z A method for the interpretation of three-dimensional equatorial GDV fields Duhau, S. Martínez, E.A. geomagnetic variation The equatorial GDV fields have been widely measured in North-South magnetometer chains and the data so obtained interpreted by assuming that these variations are bi-dimensional. This hypothesis limits its application to the inference of the noon amplitude of the ionospheric current and to the case on which the suspected local Earth's structure does not have discontinuities running along the direction normal to that of the electrojet current vector. In this work we develop a method to interpret three-dimensional GDV fields, based on the Riesz and in the Fourier integral transforms. This method consists in a numerical code that allows to separate, in real time, any three-dimensional low frequency field, and a system equations to infer the ionospheric current system at daylight times and to predict the field induced from the external GDV field in a layered Earth's model. We discuss the application of the method to data obtained in North-South magnetometer chains, and, by analyzing a particular case - data from the Indian geomagnetic observatories - we illustrate how the method increases the amount of information that may be obtained from these data. JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_13438832_v50_n2_p141_Duhau
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-134
collection Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic geomagnetic variation
spellingShingle geomagnetic variation
Duhau, S.
Martínez, E.A.
A method for the interpretation of three-dimensional equatorial GDV fields
topic_facet geomagnetic variation
description The equatorial GDV fields have been widely measured in North-South magnetometer chains and the data so obtained interpreted by assuming that these variations are bi-dimensional. This hypothesis limits its application to the inference of the noon amplitude of the ionospheric current and to the case on which the suspected local Earth's structure does not have discontinuities running along the direction normal to that of the electrojet current vector. In this work we develop a method to interpret three-dimensional GDV fields, based on the Riesz and in the Fourier integral transforms. This method consists in a numerical code that allows to separate, in real time, any three-dimensional low frequency field, and a system equations to infer the ionospheric current system at daylight times and to predict the field induced from the external GDV field in a layered Earth's model. We discuss the application of the method to data obtained in North-South magnetometer chains, and, by analyzing a particular case - data from the Indian geomagnetic observatories - we illustrate how the method increases the amount of information that may be obtained from these data.
format JOUR
author Duhau, S.
Martínez, E.A.
author_facet Duhau, S.
Martínez, E.A.
author_sort Duhau, S.
title A method for the interpretation of three-dimensional equatorial GDV fields
title_short A method for the interpretation of three-dimensional equatorial GDV fields
title_full A method for the interpretation of three-dimensional equatorial GDV fields
title_fullStr A method for the interpretation of three-dimensional equatorial GDV fields
title_full_unstemmed A method for the interpretation of three-dimensional equatorial GDV fields
title_sort method for the interpretation of three-dimensional equatorial gdv fields
url http://hdl.handle.net/20.500.12110/paper_13438832_v50_n2_p141_Duhau
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AT martinezea amethodfortheinterpretationofthreedimensionalequatorialgdvfields
AT duhaus methodfortheinterpretationofthreedimensionalequatorialgdvfields
AT martinezea methodfortheinterpretationofthreedimensionalequatorialgdvfields
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