The Experts below are selected from a list of 288 Experts worldwide ranked by ideXlab platform
Cristiano Max Wrasse - One of the best experts on this subject based on the ideXlab platform.
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Atmospheric Scattering effects on ground‐based measurements of thermospheric vertical wind, horizontal wind, and temperature
Journal of Geophysical Research: Space Physics, 2017Co-Authors: Brian J. Harding, Jianqi Qin, Jonathan J. Makela, Daniel J. Fisher, Carlos Martinis, John Noto, Cristiano Max WrasseAbstract:Ground-based Fabry-Perot interferometers (FPIs) routinely observe large vertical winds in the thermosphere, sometimes reaching over 100 m/s. These observations, which use the Doppler shift of the 630.0-nm airglow emission to estimate the wind, have long been at odds with theory. We present a summary of 5 years of data from the North American Thermosphere-Ionosphere Observing Network (NATION), showing that large apparent vertical winds are a persistent feature at midlatitudes during geomagnetic storms. We develop a radiative transfer model which demonstrates that these measurements can be explained as an artifact of the Scattering of light in the troposphere. In addition to the example from midlatitudes, we apply the model to low latitudes, where we show that the post-sunset vertical winds routinely measured over Brazil are explained in part by Atmospheric Scattering. Measurements of the horizontal wind and temperature are also affected, with errors reaching 400 m/s and 200 K in the most extreme cases.
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Atmospheric Scattering effects on ground based measurements of thermospheric vertical wind horizontal wind and temperature
Journal of Geophysical Research, 2017Co-Authors: Brian J. Harding, Jianqi Qin, Jonathan J. Makela, Daniel J. Fisher, John Noto, C R Martinis, Cristiano Max WrasseAbstract:Ground-based Fabry-Perot interferometers (FPIs) routinely observe large vertical winds in the thermosphere, sometimes reaching over 100 m/s. These observations, which use the Doppler shift of the 630.0-nm airglow emission to estimate the wind, have long been at odds with theory. We present a summary of 5 years of data from the North American Thermosphere-Ionosphere Observing Network (NATION), showing that large apparent vertical winds are a persistent feature at midlatitudes during geomagnetic storms. We develop a radiative transfer model which demonstrates that these measurements can be explained as an artifact of the Scattering of light in the troposphere. In addition to the example from midlatitudes, we apply the model to low latitudes, where we show that the post-sunset vertical winds routinely measured over Brazil are explained in part by Atmospheric Scattering. Measurements of the horizontal wind and temperature are also affected, with errors reaching 400 m/s and 200 K in the most extreme cases.
Brian J. Harding - One of the best experts on this subject based on the ideXlab platform.
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Ground-based optical measurements of quiet-time thermospheric wind and temperature: Atmospheric Scattering corrections†
Journal of Geophysical Research: Space Physics, 2017Co-Authors: Brian J. Harding, Jianqi Qin, Jonathan J. MakelaAbstract:Ground-based measurements of thermospheric wind and temperature are known to be affected by tropospheric Scattering during geomagnetically active times, when horizontal airglow gradients are large. In this work, we present an analysis of the effects during quiet times, when horizontal airglow gradients can be assumed to be negligible, and we derive corrections to be applied to historical and future data sets. These corrections are easy to apply, depending only upon the optical thickness of the atmosphere and the measured wind, not the viewing direction or temperature. If these corrections are not applied, all winds estimated from ground-based observatories are underestimated by about 10% (depending on the optical thickness), and temperatures are overestimated by a couple K. We present observational evidence of the effect of Atmospheric Scattering on temperature measurements using five years of data from the North American Thermosphere Ionosphere Observing Network (NATION). We find that the temperature measured to the east and west are statistically larger than the temperatures measured to the zenith. This is consistent with our analysis of the effect of Atmospheric Scattering, though the difference in the measurements is slightly larger than the theoretical prediction.
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Atmospheric Scattering effects on ground‐based measurements of thermospheric vertical wind, horizontal wind, and temperature
Journal of Geophysical Research: Space Physics, 2017Co-Authors: Brian J. Harding, Jianqi Qin, Jonathan J. Makela, Daniel J. Fisher, Carlos Martinis, John Noto, Cristiano Max WrasseAbstract:Ground-based Fabry-Perot interferometers (FPIs) routinely observe large vertical winds in the thermosphere, sometimes reaching over 100 m/s. These observations, which use the Doppler shift of the 630.0-nm airglow emission to estimate the wind, have long been at odds with theory. We present a summary of 5 years of data from the North American Thermosphere-Ionosphere Observing Network (NATION), showing that large apparent vertical winds are a persistent feature at midlatitudes during geomagnetic storms. We develop a radiative transfer model which demonstrates that these measurements can be explained as an artifact of the Scattering of light in the troposphere. In addition to the example from midlatitudes, we apply the model to low latitudes, where we show that the post-sunset vertical winds routinely measured over Brazil are explained in part by Atmospheric Scattering. Measurements of the horizontal wind and temperature are also affected, with errors reaching 400 m/s and 200 K in the most extreme cases.
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Atmospheric Scattering effects on ground based measurements of thermospheric vertical wind horizontal wind and temperature
Journal of Geophysical Research, 2017Co-Authors: Brian J. Harding, Jianqi Qin, Jonathan J. Makela, Daniel J. Fisher, John Noto, C R Martinis, Cristiano Max WrasseAbstract:Ground-based Fabry-Perot interferometers (FPIs) routinely observe large vertical winds in the thermosphere, sometimes reaching over 100 m/s. These observations, which use the Doppler shift of the 630.0-nm airglow emission to estimate the wind, have long been at odds with theory. We present a summary of 5 years of data from the North American Thermosphere-Ionosphere Observing Network (NATION), showing that large apparent vertical winds are a persistent feature at midlatitudes during geomagnetic storms. We develop a radiative transfer model which demonstrates that these measurements can be explained as an artifact of the Scattering of light in the troposphere. In addition to the example from midlatitudes, we apply the model to low latitudes, where we show that the post-sunset vertical winds routinely measured over Brazil are explained in part by Atmospheric Scattering. Measurements of the horizontal wind and temperature are also affected, with errors reaching 400 m/s and 200 K in the most extreme cases.
Jonathan J. Makela - One of the best experts on this subject based on the ideXlab platform.
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Ground-based optical measurements of quiet-time thermospheric wind and temperature: Atmospheric Scattering corrections†
Journal of Geophysical Research: Space Physics, 2017Co-Authors: Brian J. Harding, Jianqi Qin, Jonathan J. MakelaAbstract:Ground-based measurements of thermospheric wind and temperature are known to be affected by tropospheric Scattering during geomagnetically active times, when horizontal airglow gradients are large. In this work, we present an analysis of the effects during quiet times, when horizontal airglow gradients can be assumed to be negligible, and we derive corrections to be applied to historical and future data sets. These corrections are easy to apply, depending only upon the optical thickness of the atmosphere and the measured wind, not the viewing direction or temperature. If these corrections are not applied, all winds estimated from ground-based observatories are underestimated by about 10% (depending on the optical thickness), and temperatures are overestimated by a couple K. We present observational evidence of the effect of Atmospheric Scattering on temperature measurements using five years of data from the North American Thermosphere Ionosphere Observing Network (NATION). We find that the temperature measured to the east and west are statistically larger than the temperatures measured to the zenith. This is consistent with our analysis of the effect of Atmospheric Scattering, though the difference in the measurements is slightly larger than the theoretical prediction.
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Atmospheric Scattering effects on ground‐based measurements of thermospheric vertical wind, horizontal wind, and temperature
Journal of Geophysical Research: Space Physics, 2017Co-Authors: Brian J. Harding, Jianqi Qin, Jonathan J. Makela, Daniel J. Fisher, Carlos Martinis, John Noto, Cristiano Max WrasseAbstract:Ground-based Fabry-Perot interferometers (FPIs) routinely observe large vertical winds in the thermosphere, sometimes reaching over 100 m/s. These observations, which use the Doppler shift of the 630.0-nm airglow emission to estimate the wind, have long been at odds with theory. We present a summary of 5 years of data from the North American Thermosphere-Ionosphere Observing Network (NATION), showing that large apparent vertical winds are a persistent feature at midlatitudes during geomagnetic storms. We develop a radiative transfer model which demonstrates that these measurements can be explained as an artifact of the Scattering of light in the troposphere. In addition to the example from midlatitudes, we apply the model to low latitudes, where we show that the post-sunset vertical winds routinely measured over Brazil are explained in part by Atmospheric Scattering. Measurements of the horizontal wind and temperature are also affected, with errors reaching 400 m/s and 200 K in the most extreme cases.
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Atmospheric Scattering effects on ground based measurements of thermospheric vertical wind horizontal wind and temperature
Journal of Geophysical Research, 2017Co-Authors: Brian J. Harding, Jianqi Qin, Jonathan J. Makela, Daniel J. Fisher, John Noto, C R Martinis, Cristiano Max WrasseAbstract:Ground-based Fabry-Perot interferometers (FPIs) routinely observe large vertical winds in the thermosphere, sometimes reaching over 100 m/s. These observations, which use the Doppler shift of the 630.0-nm airglow emission to estimate the wind, have long been at odds with theory. We present a summary of 5 years of data from the North American Thermosphere-Ionosphere Observing Network (NATION), showing that large apparent vertical winds are a persistent feature at midlatitudes during geomagnetic storms. We develop a radiative transfer model which demonstrates that these measurements can be explained as an artifact of the Scattering of light in the troposphere. In addition to the example from midlatitudes, we apply the model to low latitudes, where we show that the post-sunset vertical winds routinely measured over Brazil are explained in part by Atmospheric Scattering. Measurements of the horizontal wind and temperature are also affected, with errors reaching 400 m/s and 200 K in the most extreme cases.
Jianqi Qin - One of the best experts on this subject based on the ideXlab platform.
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Ground-based optical measurements of quiet-time thermospheric wind and temperature: Atmospheric Scattering corrections†
Journal of Geophysical Research: Space Physics, 2017Co-Authors: Brian J. Harding, Jianqi Qin, Jonathan J. MakelaAbstract:Ground-based measurements of thermospheric wind and temperature are known to be affected by tropospheric Scattering during geomagnetically active times, when horizontal airglow gradients are large. In this work, we present an analysis of the effects during quiet times, when horizontal airglow gradients can be assumed to be negligible, and we derive corrections to be applied to historical and future data sets. These corrections are easy to apply, depending only upon the optical thickness of the atmosphere and the measured wind, not the viewing direction or temperature. If these corrections are not applied, all winds estimated from ground-based observatories are underestimated by about 10% (depending on the optical thickness), and temperatures are overestimated by a couple K. We present observational evidence of the effect of Atmospheric Scattering on temperature measurements using five years of data from the North American Thermosphere Ionosphere Observing Network (NATION). We find that the temperature measured to the east and west are statistically larger than the temperatures measured to the zenith. This is consistent with our analysis of the effect of Atmospheric Scattering, though the difference in the measurements is slightly larger than the theoretical prediction.
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Atmospheric Scattering effects on ground‐based measurements of thermospheric vertical wind, horizontal wind, and temperature
Journal of Geophysical Research: Space Physics, 2017Co-Authors: Brian J. Harding, Jianqi Qin, Jonathan J. Makela, Daniel J. Fisher, Carlos Martinis, John Noto, Cristiano Max WrasseAbstract:Ground-based Fabry-Perot interferometers (FPIs) routinely observe large vertical winds in the thermosphere, sometimes reaching over 100 m/s. These observations, which use the Doppler shift of the 630.0-nm airglow emission to estimate the wind, have long been at odds with theory. We present a summary of 5 years of data from the North American Thermosphere-Ionosphere Observing Network (NATION), showing that large apparent vertical winds are a persistent feature at midlatitudes during geomagnetic storms. We develop a radiative transfer model which demonstrates that these measurements can be explained as an artifact of the Scattering of light in the troposphere. In addition to the example from midlatitudes, we apply the model to low latitudes, where we show that the post-sunset vertical winds routinely measured over Brazil are explained in part by Atmospheric Scattering. Measurements of the horizontal wind and temperature are also affected, with errors reaching 400 m/s and 200 K in the most extreme cases.
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Atmospheric Scattering effects on ground based measurements of thermospheric vertical wind horizontal wind and temperature
Journal of Geophysical Research, 2017Co-Authors: Brian J. Harding, Jianqi Qin, Jonathan J. Makela, Daniel J. Fisher, John Noto, C R Martinis, Cristiano Max WrasseAbstract:Ground-based Fabry-Perot interferometers (FPIs) routinely observe large vertical winds in the thermosphere, sometimes reaching over 100 m/s. These observations, which use the Doppler shift of the 630.0-nm airglow emission to estimate the wind, have long been at odds with theory. We present a summary of 5 years of data from the North American Thermosphere-Ionosphere Observing Network (NATION), showing that large apparent vertical winds are a persistent feature at midlatitudes during geomagnetic storms. We develop a radiative transfer model which demonstrates that these measurements can be explained as an artifact of the Scattering of light in the troposphere. In addition to the example from midlatitudes, we apply the model to low latitudes, where we show that the post-sunset vertical winds routinely measured over Brazil are explained in part by Atmospheric Scattering. Measurements of the horizontal wind and temperature are also affected, with errors reaching 400 m/s and 200 K in the most extreme cases.
Daniel J. Fisher - One of the best experts on this subject based on the ideXlab platform.
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Atmospheric Scattering effects on ground‐based measurements of thermospheric vertical wind, horizontal wind, and temperature
Journal of Geophysical Research: Space Physics, 2017Co-Authors: Brian J. Harding, Jianqi Qin, Jonathan J. Makela, Daniel J. Fisher, Carlos Martinis, John Noto, Cristiano Max WrasseAbstract:Ground-based Fabry-Perot interferometers (FPIs) routinely observe large vertical winds in the thermosphere, sometimes reaching over 100 m/s. These observations, which use the Doppler shift of the 630.0-nm airglow emission to estimate the wind, have long been at odds with theory. We present a summary of 5 years of data from the North American Thermosphere-Ionosphere Observing Network (NATION), showing that large apparent vertical winds are a persistent feature at midlatitudes during geomagnetic storms. We develop a radiative transfer model which demonstrates that these measurements can be explained as an artifact of the Scattering of light in the troposphere. In addition to the example from midlatitudes, we apply the model to low latitudes, where we show that the post-sunset vertical winds routinely measured over Brazil are explained in part by Atmospheric Scattering. Measurements of the horizontal wind and temperature are also affected, with errors reaching 400 m/s and 200 K in the most extreme cases.
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Atmospheric Scattering effects on ground based measurements of thermospheric vertical wind horizontal wind and temperature
Journal of Geophysical Research, 2017Co-Authors: Brian J. Harding, Jianqi Qin, Jonathan J. Makela, Daniel J. Fisher, John Noto, C R Martinis, Cristiano Max WrasseAbstract:Ground-based Fabry-Perot interferometers (FPIs) routinely observe large vertical winds in the thermosphere, sometimes reaching over 100 m/s. These observations, which use the Doppler shift of the 630.0-nm airglow emission to estimate the wind, have long been at odds with theory. We present a summary of 5 years of data from the North American Thermosphere-Ionosphere Observing Network (NATION), showing that large apparent vertical winds are a persistent feature at midlatitudes during geomagnetic storms. We develop a radiative transfer model which demonstrates that these measurements can be explained as an artifact of the Scattering of light in the troposphere. In addition to the example from midlatitudes, we apply the model to low latitudes, where we show that the post-sunset vertical winds routinely measured over Brazil are explained in part by Atmospheric Scattering. Measurements of the horizontal wind and temperature are also affected, with errors reaching 400 m/s and 200 K in the most extreme cases.