Estimation of Thermospheric Zonal and Meridional Winds Using a Kalman Filter Technique
Knowledge of the thermospheric neutral wind and its horizontal components is critical for an improved understanding of F region dynamics and morphology. However, to date their reliable estimation remains a challenge because of difficulties in both measurement and modeling. We present a new method to...
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ftutahsudc:oai:digitalcommons.usu.edu:physics_facpub-3162 2023-05-15T18:43:17+02:00 Estimation of Thermospheric Zonal and Meridional Winds Using a Kalman Filter Technique Lomidze, Levan Scherliess, Ludger Blackwell Publishing Ltd 2015-11-01T07:00:00Z https://digitalcommons.usu.edu/physics_facpub/2029 http://onlinelibrary.wiley.com/doi/10.1002/2015SW001250/full unknown Hosted by Utah State University Libraries https://digitalcommons.usu.edu/physics_facpub/2029 http://onlinelibrary.wiley.com/doi/10.1002/2015SW001250/full Copyright for this work is held by the author. Transmission or reproduction of materials protected by copyright beyond that allowed by fair use requires the written permission of the copyright owners. Works not in the public domain cannot be commercially exploited without permission of the copyright owner. Responsibility for any use rests exclusively with the user. For more information contact the Institutional Repository Librarian at digitalcommons@usu.edu. PDM All Physics Faculty Publications thermospheric neutral winds Thermospheric Wind Assimilation Model (TWAM) Weddell Sea Anomaly Physics text 2015 ftutahsudc 2022-03-07T22:26:09Z Knowledge of the thermospheric neutral wind and its horizontal components is critical for an improved understanding of F region dynamics and morphology. However, to date their reliable estimation remains a challenge because of difficulties in both measurement and modeling. We present a new method to estimate the climatology of the zonal and meridional components of thermospheric neutral wind at low and middle latitudes using a Kalman filter technique. First, the climatology of the magnetic meridional wind is obtained by assimilating seasonal maps of F region ionosphere peak parameters (NmF2 and hmF2), obtained from Constellation Observing System for Meteorology, Ionosphere, and Climate radio occultation data, into the Global Assimilation of Ionospheric Measurements Full Physics (GAIM-FP) model. GAIM-FP provides the 3-D electron density throughout the ionosphere, together with the magnetic meridional wind. Next, the global zonal and meridional wind components are estimated using a newly developed Thermospheric Wind Assimilation Model (TWAM). TWAM combines magnetic meridional wind data obtained from GAIM-FP with a physics-based 3-D thermospheric neutral wind model using an implicit Kalman filter technique. Ionospheric drag and ion diffusion velocities, needed for the wind calculation, are also taken from GAIM-FP. The obtained wind velocities are in close agreement with measurements made by interferometers and with wind values from the Horizontal Wind Model 93 (HWM93) over Millstone Hill, Arecibo, and Arequipa during December and June solstices, and March equinox. In addition, it is shown that compared to HWM93 the winds from TWAM significantly improve the accuracy of the Ionosphere/Plasmasphere Model in reproducing the observed electron density variation over the Weddell Sea Anomaly. ©2015. American Geophysical Union. All Rights Reserved. Text Weddell Sea Utah State University: DigitalCommons@USU Weddell Weddell Sea |
institution |
Open Polar |
collection |
Utah State University: DigitalCommons@USU |
op_collection_id |
ftutahsudc |
language |
unknown |
topic |
thermospheric neutral winds Thermospheric Wind Assimilation Model (TWAM) Weddell Sea Anomaly Physics |
spellingShingle |
thermospheric neutral winds Thermospheric Wind Assimilation Model (TWAM) Weddell Sea Anomaly Physics Lomidze, Levan Scherliess, Ludger Estimation of Thermospheric Zonal and Meridional Winds Using a Kalman Filter Technique |
topic_facet |
thermospheric neutral winds Thermospheric Wind Assimilation Model (TWAM) Weddell Sea Anomaly Physics |
description |
Knowledge of the thermospheric neutral wind and its horizontal components is critical for an improved understanding of F region dynamics and morphology. However, to date their reliable estimation remains a challenge because of difficulties in both measurement and modeling. We present a new method to estimate the climatology of the zonal and meridional components of thermospheric neutral wind at low and middle latitudes using a Kalman filter technique. First, the climatology of the magnetic meridional wind is obtained by assimilating seasonal maps of F region ionosphere peak parameters (NmF2 and hmF2), obtained from Constellation Observing System for Meteorology, Ionosphere, and Climate radio occultation data, into the Global Assimilation of Ionospheric Measurements Full Physics (GAIM-FP) model. GAIM-FP provides the 3-D electron density throughout the ionosphere, together with the magnetic meridional wind. Next, the global zonal and meridional wind components are estimated using a newly developed Thermospheric Wind Assimilation Model (TWAM). TWAM combines magnetic meridional wind data obtained from GAIM-FP with a physics-based 3-D thermospheric neutral wind model using an implicit Kalman filter technique. Ionospheric drag and ion diffusion velocities, needed for the wind calculation, are also taken from GAIM-FP. The obtained wind velocities are in close agreement with measurements made by interferometers and with wind values from the Horizontal Wind Model 93 (HWM93) over Millstone Hill, Arecibo, and Arequipa during December and June solstices, and March equinox. In addition, it is shown that compared to HWM93 the winds from TWAM significantly improve the accuracy of the Ionosphere/Plasmasphere Model in reproducing the observed electron density variation over the Weddell Sea Anomaly. ©2015. American Geophysical Union. All Rights Reserved. |
author2 |
Blackwell Publishing Ltd |
format |
Text |
author |
Lomidze, Levan Scherliess, Ludger |
author_facet |
Lomidze, Levan Scherliess, Ludger |
author_sort |
Lomidze, Levan |
title |
Estimation of Thermospheric Zonal and Meridional Winds Using a Kalman Filter Technique |
title_short |
Estimation of Thermospheric Zonal and Meridional Winds Using a Kalman Filter Technique |
title_full |
Estimation of Thermospheric Zonal and Meridional Winds Using a Kalman Filter Technique |
title_fullStr |
Estimation of Thermospheric Zonal and Meridional Winds Using a Kalman Filter Technique |
title_full_unstemmed |
Estimation of Thermospheric Zonal and Meridional Winds Using a Kalman Filter Technique |
title_sort |
estimation of thermospheric zonal and meridional winds using a kalman filter technique |
publisher |
Hosted by Utah State University Libraries |
publishDate |
2015 |
url |
https://digitalcommons.usu.edu/physics_facpub/2029 http://onlinelibrary.wiley.com/doi/10.1002/2015SW001250/full |
geographic |
Weddell Weddell Sea |
geographic_facet |
Weddell Weddell Sea |
genre |
Weddell Sea |
genre_facet |
Weddell Sea |
op_source |
All Physics Faculty Publications |
op_relation |
https://digitalcommons.usu.edu/physics_facpub/2029 http://onlinelibrary.wiley.com/doi/10.1002/2015SW001250/full |
op_rights |
Copyright for this work is held by the author. Transmission or reproduction of materials protected by copyright beyond that allowed by fair use requires the written permission of the copyright owners. Works not in the public domain cannot be commercially exploited without permission of the copyright owner. Responsibility for any use rests exclusively with the user. For more information contact the Institutional Repository Librarian at digitalcommons@usu.edu. |
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PDM |
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1766233597672423424 |