A method to derive maps of ionospheric conductances, currents, and convection from the Swarm multisatellite mission

O. Amm, H. Vanhamäki, K. Kauristie, Claudia Stolle, Freddy Christiansen, R. Haagmans, A. Masson, M. G. G. T. Taylor, R. Floberghagen, C. P. Escoubet

Research output: Contribution to journalJournal articleResearchpeer-review

Abstract

The European Space Agency (ESA) Swarm spacecraft mission is the first multisatellite ionospheric mission with two low-orbiting spacecraft that are flying in parallel at a distance of ~100–140 km, thus allowing derivation of spatial gradients of ionospheric parameters not only along the orbits but also in the direction perpendicular to them. A third satellite with a higher orbit regularly crosses the paths of the lower spacecraft. Using the Swarmmagnetic and electric field instruments,we present a novel technique that allows derivation of two-dimensional (2-D) maps of ionospheric conductances, currents, and electric field in the area between the trajectories of the two lower spacecraft, and even to some extent outside of it. This technique is based on Spherical Elementary Current Systems. We present test cases of modeled situations from which we calculate virtual Swarm data and show that the technique is able to reconstruct the model electric field, horizontal currents, and conductances with a very good accuracy. Larger errors arise for the reconstruction of the 2-D field-aligned currents (FAC), especially in the area outside of the spacecraft orbits. However, even in this case the general pattern of FAC is recovered, and the magnitudes are valid in an integrated sense. Finally, using an MHD model run, we show how our technique allows estimation of the ionosphere-magnetosphere coupling parameter K, if conjugate observations of the magnetospheric magnetic and electric field are available. In the case of a magnetospheric multisatellite mission (e.g., the ESA Cluster mission) several K estimates at nearby points can be generated.
Original languageEnglish
JournalJournal of Geophysical Research: Space Physics
Volume120
Pages (from-to)3263-3282
ISSN2169-9380
DOIs
Publication statusPublished - 2015

Cite this

Amm, O. ; Vanhamäki, H. ; Kauristie, K. ; Stolle, Claudia ; Christiansen, Freddy ; Haagmans, R. ; Masson, A. ; Taylor, M. G. G. T. ; Floberghagen, R. ; Escoubet, C. P. . / A method to derive maps of ionospheric conductances, currents, and convection from the Swarm multisatellite mission. In: Journal of Geophysical Research: Space Physics. 2015 ; Vol. 120. pp. 3263-3282.
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abstract = "The European Space Agency (ESA) Swarm spacecraft mission is the first multisatellite ionospheric mission with two low-orbiting spacecraft that are flying in parallel at a distance of ~100–140 km, thus allowing derivation of spatial gradients of ionospheric parameters not only along the orbits but also in the direction perpendicular to them. A third satellite with a higher orbit regularly crosses the paths of the lower spacecraft. Using the Swarmmagnetic and electric field instruments,we present a novel technique that allows derivation of two-dimensional (2-D) maps of ionospheric conductances, currents, and electric field in the area between the trajectories of the two lower spacecraft, and even to some extent outside of it. This technique is based on Spherical Elementary Current Systems. We present test cases of modeled situations from which we calculate virtual Swarm data and show that the technique is able to reconstruct the model electric field, horizontal currents, and conductances with a very good accuracy. Larger errors arise for the reconstruction of the 2-D field-aligned currents (FAC), especially in the area outside of the spacecraft orbits. However, even in this case the general pattern of FAC is recovered, and the magnitudes are valid in an integrated sense. Finally, using an MHD model run, we show how our technique allows estimation of the ionosphere-magnetosphere coupling parameter K, if conjugate observations of the magnetospheric magnetic and electric field are available. In the case of a magnetospheric multisatellite mission (e.g., the ESA Cluster mission) several K estimates at nearby points can be generated.",
author = "O. Amm and H. Vanham{\"a}ki and K. Kauristie and Claudia Stolle and Freddy Christiansen and R. Haagmans and A. Masson and Taylor, {M. G. G. T.} and R. Floberghagen and Escoubet, {C. P.}",
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language = "English",
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Amm, O, Vanhamäki, H, Kauristie, K, Stolle, C, Christiansen, F, Haagmans, R, Masson, A, Taylor, MGGT, Floberghagen, R & Escoubet, CP 2015, 'A method to derive maps of ionospheric conductances, currents, and convection from the Swarm multisatellite mission', Journal of Geophysical Research: Space Physics, vol. 120, pp. 3263-3282. https://doi.org/10.1002/2014JA020154

A method to derive maps of ionospheric conductances, currents, and convection from the Swarm multisatellite mission. / Amm, O.; Vanhamäki, H.; Kauristie, K.; Stolle, Claudia; Christiansen, Freddy; Haagmans, R.; Masson, A.; Taylor, M. G. G. T.; Floberghagen, R.; Escoubet, C. P. .

In: Journal of Geophysical Research: Space Physics, Vol. 120, 2015, p. 3263-3282.

Research output: Contribution to journalJournal articleResearchpeer-review

TY - JOUR

T1 - A method to derive maps of ionospheric conductances, currents, and convection from the Swarm multisatellite mission

AU - Amm, O.

AU - Vanhamäki, H.

AU - Kauristie, K.

AU - Stolle, Claudia

AU - Christiansen, Freddy

AU - Haagmans, R.

AU - Masson, A.

AU - Taylor, M. G. G. T.

AU - Floberghagen, R.

AU - Escoubet, C. P.

PY - 2015

Y1 - 2015

N2 - The European Space Agency (ESA) Swarm spacecraft mission is the first multisatellite ionospheric mission with two low-orbiting spacecraft that are flying in parallel at a distance of ~100–140 km, thus allowing derivation of spatial gradients of ionospheric parameters not only along the orbits but also in the direction perpendicular to them. A third satellite with a higher orbit regularly crosses the paths of the lower spacecraft. Using the Swarmmagnetic and electric field instruments,we present a novel technique that allows derivation of two-dimensional (2-D) maps of ionospheric conductances, currents, and electric field in the area between the trajectories of the two lower spacecraft, and even to some extent outside of it. This technique is based on Spherical Elementary Current Systems. We present test cases of modeled situations from which we calculate virtual Swarm data and show that the technique is able to reconstruct the model electric field, horizontal currents, and conductances with a very good accuracy. Larger errors arise for the reconstruction of the 2-D field-aligned currents (FAC), especially in the area outside of the spacecraft orbits. However, even in this case the general pattern of FAC is recovered, and the magnitudes are valid in an integrated sense. Finally, using an MHD model run, we show how our technique allows estimation of the ionosphere-magnetosphere coupling parameter K, if conjugate observations of the magnetospheric magnetic and electric field are available. In the case of a magnetospheric multisatellite mission (e.g., the ESA Cluster mission) several K estimates at nearby points can be generated.

AB - The European Space Agency (ESA) Swarm spacecraft mission is the first multisatellite ionospheric mission with two low-orbiting spacecraft that are flying in parallel at a distance of ~100–140 km, thus allowing derivation of spatial gradients of ionospheric parameters not only along the orbits but also in the direction perpendicular to them. A third satellite with a higher orbit regularly crosses the paths of the lower spacecraft. Using the Swarmmagnetic and electric field instruments,we present a novel technique that allows derivation of two-dimensional (2-D) maps of ionospheric conductances, currents, and electric field in the area between the trajectories of the two lower spacecraft, and even to some extent outside of it. This technique is based on Spherical Elementary Current Systems. We present test cases of modeled situations from which we calculate virtual Swarm data and show that the technique is able to reconstruct the model electric field, horizontal currents, and conductances with a very good accuracy. Larger errors arise for the reconstruction of the 2-D field-aligned currents (FAC), especially in the area outside of the spacecraft orbits. However, even in this case the general pattern of FAC is recovered, and the magnitudes are valid in an integrated sense. Finally, using an MHD model run, we show how our technique allows estimation of the ionosphere-magnetosphere coupling parameter K, if conjugate observations of the magnetospheric magnetic and electric field are available. In the case of a magnetospheric multisatellite mission (e.g., the ESA Cluster mission) several K estimates at nearby points can be generated.

U2 - 10.1002/2014JA020154

DO - 10.1002/2014JA020154

M3 - Journal article

VL - 120

SP - 3263

EP - 3282

JO - Journal of Geophysical Research

JF - Journal of Geophysical Research

SN - 0148-0227

ER -