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Mode number calculations of ULF field‐line resonances using ground magnetometers and THEMIS measurements
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| Zeitschriftentitel: | Journal of Geophysical Research: Space Physics |
|---|---|
| Personen und Körperschaften: | , , , , , |
| In: | Journal of Geophysical Research: Space Physics, 118, 2013, 11, S. 6986-6997 |
| Format: | E-Article |
| Sprache: | Englisch |
| veröffentlicht: |
American Geophysical Union (AGU)
|
| Schlagwörter: |
| author_facet |
Sarris, T. E. Li, X. Liu, W. Argyriadis, E. Boudouridis, A. Ergun, R. Sarris, T. E. Li, X. Liu, W. Argyriadis, E. Boudouridis, A. Ergun, R. |
|---|---|
| author |
Sarris, T. E. Li, X. Liu, W. Argyriadis, E. Boudouridis, A. Ergun, R. |
| spellingShingle |
Sarris, T. E. Li, X. Liu, W. Argyriadis, E. Boudouridis, A. Ergun, R. Journal of Geophysical Research: Space Physics Mode number calculations of ULF field‐line resonances using ground magnetometers and THEMIS measurements Space and Planetary Science Geophysics |
| author_sort |
sarris, t. e. |
| spelling |
Sarris, T. E. Li, X. Liu, W. Argyriadis, E. Boudouridis, A. Ergun, R. 2169-9380 2169-9402 American Geophysical Union (AGU) Space and Planetary Science Geophysics http://dx.doi.org/10.1002/2012ja018307 <jats:title>Abstract</jats:title><jats:p>Using multiple pairs of International Monitor for Auroral Geomagnetic Effects ground magnetometers together with simultaneous measurements from two of the Time History of Events and Macroscale Interactions during Substorms (THEMIS) spacecraft constellation, when they were flying over the magnetometers in magnetic conjunction and in close azimuthal separation, we are able to calculate the phase differences of Ultra Low Frequency Field‐Line Resonances, and, through that, their azimuthal mode number, wavelength and propagation characteristics. A cross‐wavelet technique is applied, that exposes the times and frequencies of common power between time series from azimuthally aligned magnetometers in space or on the ground, yielding their relative phase. Using the amplitude ratio and phase differences between ground stations with similar longitudes that are separated in latitude, a correction to the mode number calculation is demonstrated, accounting for the phase differences that arise from the L shell separation of the THEMIS probes.</jats:p> Mode number calculations of ULF field‐line resonances using ground magnetometers and THEMIS measurements Journal of Geophysical Research: Space Physics |
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10.1002/2012ja018307 |
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| title |
Mode number calculations of ULF field‐line resonances using ground magnetometers and THEMIS measurements |
| title_unstemmed |
Mode number calculations of ULF field‐line resonances using ground magnetometers and THEMIS measurements |
| title_full |
Mode number calculations of ULF field‐line resonances using ground magnetometers and THEMIS measurements |
| title_fullStr |
Mode number calculations of ULF field‐line resonances using ground magnetometers and THEMIS measurements |
| title_full_unstemmed |
Mode number calculations of ULF field‐line resonances using ground magnetometers and THEMIS measurements |
| title_short |
Mode number calculations of ULF field‐line resonances using ground magnetometers and THEMIS measurements |
| title_sort |
mode number calculations of ulf field‐line resonances using ground magnetometers and themis measurements |
| topic |
Space and Planetary Science Geophysics |
| url |
http://dx.doi.org/10.1002/2012ja018307 |
| publishDate |
2013 |
| physical |
6986-6997 |
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<jats:title>Abstract</jats:title><jats:p>Using multiple pairs of International Monitor for Auroral Geomagnetic Effects ground magnetometers together with simultaneous measurements from two of the Time History of Events and Macroscale Interactions during Substorms (THEMIS) spacecraft constellation, when they were flying over the magnetometers in magnetic conjunction and in close azimuthal separation, we are able to calculate the phase differences of Ultra Low Frequency Field‐Line Resonances, and, through that, their azimuthal mode number, wavelength and propagation characteristics. A cross‐wavelet technique is applied, that exposes the times and frequencies of common power between time series from azimuthally aligned magnetometers in space or on the ground, yielding their relative phase. Using the amplitude ratio and phase differences between ground stations with similar longitudes that are separated in latitude, a correction to the mode number calculation is demonstrated, accounting for the phase differences that arise from the L shell separation of the THEMIS probes.</jats:p> |
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| author | Sarris, T. E., Li, X., Liu, W., Argyriadis, E., Boudouridis, A., Ergun, R. |
| author_facet | Sarris, T. E., Li, X., Liu, W., Argyriadis, E., Boudouridis, A., Ergun, R., Sarris, T. E., Li, X., Liu, W., Argyriadis, E., Boudouridis, A., Ergun, R. |
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| description | <jats:title>Abstract</jats:title><jats:p>Using multiple pairs of International Monitor for Auroral Geomagnetic Effects ground magnetometers together with simultaneous measurements from two of the Time History of Events and Macroscale Interactions during Substorms (THEMIS) spacecraft constellation, when they were flying over the magnetometers in magnetic conjunction and in close azimuthal separation, we are able to calculate the phase differences of Ultra Low Frequency Field‐Line Resonances, and, through that, their azimuthal mode number, wavelength and propagation characteristics. A cross‐wavelet technique is applied, that exposes the times and frequencies of common power between time series from azimuthally aligned magnetometers in space or on the ground, yielding their relative phase. Using the amplitude ratio and phase differences between ground stations with similar longitudes that are separated in latitude, a correction to the mode number calculation is demonstrated, accounting for the phase differences that arise from the L shell separation of the THEMIS probes.</jats:p> |
| doi_str_mv | 10.1002/2012ja018307 |
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| imprint_str_mv | American Geophysical Union (AGU), 2013 |
| institution | DE-105, DE-14, DE-Ch1, DE-L229, DE-D275, DE-Bn3, DE-Brt1, DE-Zwi2, DE-D161, DE-Gla1, DE-Zi4, DE-15, DE-Pl11, DE-Rs1 |
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| physical | 6986-6997 |
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| series | Journal of Geophysical Research: Space Physics |
| source_id | 49 |
| spelling | Sarris, T. E. Li, X. Liu, W. Argyriadis, E. Boudouridis, A. Ergun, R. 2169-9380 2169-9402 American Geophysical Union (AGU) Space and Planetary Science Geophysics http://dx.doi.org/10.1002/2012ja018307 <jats:title>Abstract</jats:title><jats:p>Using multiple pairs of International Monitor for Auroral Geomagnetic Effects ground magnetometers together with simultaneous measurements from two of the Time History of Events and Macroscale Interactions during Substorms (THEMIS) spacecraft constellation, when they were flying over the magnetometers in magnetic conjunction and in close azimuthal separation, we are able to calculate the phase differences of Ultra Low Frequency Field‐Line Resonances, and, through that, their azimuthal mode number, wavelength and propagation characteristics. A cross‐wavelet technique is applied, that exposes the times and frequencies of common power between time series from azimuthally aligned magnetometers in space or on the ground, yielding their relative phase. Using the amplitude ratio and phase differences between ground stations with similar longitudes that are separated in latitude, a correction to the mode number calculation is demonstrated, accounting for the phase differences that arise from the L shell separation of the THEMIS probes.</jats:p> Mode number calculations of ULF field‐line resonances using ground magnetometers and THEMIS measurements Journal of Geophysical Research: Space Physics |
| spellingShingle | Sarris, T. E., Li, X., Liu, W., Argyriadis, E., Boudouridis, A., Ergun, R., Journal of Geophysical Research: Space Physics, Mode number calculations of ULF field‐line resonances using ground magnetometers and THEMIS measurements, Space and Planetary Science, Geophysics |
| title | Mode number calculations of ULF field‐line resonances using ground magnetometers and THEMIS measurements |
| title_full | Mode number calculations of ULF field‐line resonances using ground magnetometers and THEMIS measurements |
| title_fullStr | Mode number calculations of ULF field‐line resonances using ground magnetometers and THEMIS measurements |
| title_full_unstemmed | Mode number calculations of ULF field‐line resonances using ground magnetometers and THEMIS measurements |
| title_short | Mode number calculations of ULF field‐line resonances using ground magnetometers and THEMIS measurements |
| title_sort | mode number calculations of ulf field‐line resonances using ground magnetometers and themis measurements |
| title_unstemmed | Mode number calculations of ULF field‐line resonances using ground magnetometers and THEMIS measurements |
| topic | Space and Planetary Science, Geophysics |
| url | http://dx.doi.org/10.1002/2012ja018307 |