2001): Modeling of equivalent ionospheric currents from meridian magnetometer chain data, Earth Planets Space
In recent years, quantitative analysis of the magnetosphere-ionosphere coupling and electrodynamics of the polar ionosphere received much attention. Though remarkable progress has been made in this field by using a variety of magnetogram inversion techniques in order to infer the global ionospheric...
Main Authors: | , , |
---|---|
Other Authors: | |
Format: | Text |
Language: | English |
Subjects: | |
Online Access: | http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.567.6824 http://www.terrapub.co.jp/journals/EPS/pdf/2001/5302/53020129.pdf |
id |
ftciteseerx:oai:CiteSeerX.psu:10.1.1.567.6824 |
---|---|
record_format |
openpolar |
spelling |
ftciteseerx:oai:CiteSeerX.psu:10.1.1.567.6824 2023-05-15T16:29:37+02:00 2001): Modeling of equivalent ionospheric currents from meridian magnetometer chain data, Earth Planets Space V. A. Popov V. O. Papitashvili J. F. Watermann The Pennsylvania State University CiteSeerX Archives application/pdf http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.567.6824 http://www.terrapub.co.jp/journals/EPS/pdf/2001/5302/53020129.pdf en eng http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.567.6824 http://www.terrapub.co.jp/journals/EPS/pdf/2001/5302/53020129.pdf Metadata may be used without restrictions as long as the oai identifier remains attached to it. http://www.terrapub.co.jp/journals/EPS/pdf/2001/5302/53020129.pdf text ftciteseerx 2016-01-08T12:20:23Z In recent years, quantitative analysis of the magnetosphere-ionosphere coupling and electrodynamics of the polar ionosphere received much attention. Though remarkable progress has been made in this field by using a variety of magnetogram inversion techniques in order to infer the global ionospheric current distribution, there is still a need for modeling ionospheric currents locally, over a certain region, for comparison with other geophysical ground-based and satellite observations. This paper presents a simple method for estimating equivalent ionospheric currents using magnetic field observations along a meridian chain of ground-based vector magnetometers. The method can be applied in an automatic fashion to any available magnetometer chain data, for example, from the DMI Greenland west coast chain. We first describe how we separate contributions to the observed geomagnetic variations from external (ionospheric) and internal (induced) sources. We then model the ionospheric electrojet by a sequence of narrow current strips and apply the Biot-Savart law to formulate an inversion problem. Using a regularization technique, we find a stable distribution of the equivalent ionospheric currents crossing the magnetometer chain in eastward and westward direction. Simulation tests and a case study (20 March 1999) are discussed in order to illustrate properties of the solution to the inverse problem and to present a practical tool, which is accessible through the DMI World Wide Web site. 1. Text Greenland Unknown Greenland |
institution |
Open Polar |
collection |
Unknown |
op_collection_id |
ftciteseerx |
language |
English |
description |
In recent years, quantitative analysis of the magnetosphere-ionosphere coupling and electrodynamics of the polar ionosphere received much attention. Though remarkable progress has been made in this field by using a variety of magnetogram inversion techniques in order to infer the global ionospheric current distribution, there is still a need for modeling ionospheric currents locally, over a certain region, for comparison with other geophysical ground-based and satellite observations. This paper presents a simple method for estimating equivalent ionospheric currents using magnetic field observations along a meridian chain of ground-based vector magnetometers. The method can be applied in an automatic fashion to any available magnetometer chain data, for example, from the DMI Greenland west coast chain. We first describe how we separate contributions to the observed geomagnetic variations from external (ionospheric) and internal (induced) sources. We then model the ionospheric electrojet by a sequence of narrow current strips and apply the Biot-Savart law to formulate an inversion problem. Using a regularization technique, we find a stable distribution of the equivalent ionospheric currents crossing the magnetometer chain in eastward and westward direction. Simulation tests and a case study (20 March 1999) are discussed in order to illustrate properties of the solution to the inverse problem and to present a practical tool, which is accessible through the DMI World Wide Web site. 1. |
author2 |
The Pennsylvania State University CiteSeerX Archives |
format |
Text |
author |
V. A. Popov V. O. Papitashvili J. F. Watermann |
spellingShingle |
V. A. Popov V. O. Papitashvili J. F. Watermann 2001): Modeling of equivalent ionospheric currents from meridian magnetometer chain data, Earth Planets Space |
author_facet |
V. A. Popov V. O. Papitashvili J. F. Watermann |
author_sort |
V. A. Popov |
title |
2001): Modeling of equivalent ionospheric currents from meridian magnetometer chain data, Earth Planets Space |
title_short |
2001): Modeling of equivalent ionospheric currents from meridian magnetometer chain data, Earth Planets Space |
title_full |
2001): Modeling of equivalent ionospheric currents from meridian magnetometer chain data, Earth Planets Space |
title_fullStr |
2001): Modeling of equivalent ionospheric currents from meridian magnetometer chain data, Earth Planets Space |
title_full_unstemmed |
2001): Modeling of equivalent ionospheric currents from meridian magnetometer chain data, Earth Planets Space |
title_sort |
2001): modeling of equivalent ionospheric currents from meridian magnetometer chain data, earth planets space |
url |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.567.6824 http://www.terrapub.co.jp/journals/EPS/pdf/2001/5302/53020129.pdf |
geographic |
Greenland |
geographic_facet |
Greenland |
genre |
Greenland |
genre_facet |
Greenland |
op_source |
http://www.terrapub.co.jp/journals/EPS/pdf/2001/5302/53020129.pdf |
op_relation |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.567.6824 http://www.terrapub.co.jp/journals/EPS/pdf/2001/5302/53020129.pdf |
op_rights |
Metadata may be used without restrictions as long as the oai identifier remains attached to it. |
_version_ |
1766019324209790976 |