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Observing mesospheric neutral wind with the Electrojet Zeeman Imaging Explorer (EZIE)

Urheber*innen

Vanhamaki,  Heikki
IUGG 2023, General Assemblies, 1 General, International Union of Geodesy and Geophysics (IUGG), External Organizations;

de Mesquita,  Rafael
IUGG 2023, General Assemblies, 1 General, International Union of Geodesy and Geophysics (IUGG), External Organizations;

Maute,  Astrid
IUGG 2023, General Assemblies, 1 General, International Union of Geodesy and Geophysics (IUGG), External Organizations;

Yee,  Sam
IUGG 2023, General Assemblies, 1 General, International Union of Geodesy and Geophysics (IUGG), External Organizations;

Gjerloev,  Jesper
IUGG 2023, General Assemblies, 1 General, International Union of Geodesy and Geophysics (IUGG), External Organizations;

Laundal,  Karl
IUGG 2023, General Assemblies, 1 General, International Union of Geodesy and Geophysics (IUGG), External Organizations;

Wang,  Wenbin
IUGG 2023, General Assemblies, 1 General, International Union of Geodesy and Geophysics (IUGG), External Organizations;

Espy,  Patrick
IUGG 2023, General Assemblies, 1 General, International Union of Geodesy and Geophysics (IUGG), External Organizations;

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Zitation

Vanhamaki, H., de Mesquita, R., Maute, A., Yee, S., Gjerloev, J., Laundal, K., Wang, W., Espy, P. (2023): Observing mesospheric neutral wind with the Electrojet Zeeman Imaging Explorer (EZIE), XXVIII General Assembly of the International Union of Geodesy and Geophysics (IUGG) (Berlin 2023).
https://doi.org/10.57757/IUGG23-2397


Zitierlink: https://gfzpublic.gfz-potsdam.de/pubman/item/item_5018360
Zusammenfassung
The Electrojet Zeeman Imaging Explorer (EZIE) mission will study the auroral electrojets using remote sensing of the associated magnetic perturbations. EZIE was selected as a NASA Heliophysics mission in December 2020, and is currently under development for a launch in the winter 2024-2025. The mission consists of 3 identical 6U CubeSats, each carrying 4 compact spectropolarimeters looking downward at nadir and three cross-track directions. These instruments will measure the Zeeman splitting of molecular oxygen thermal emissions around 118 GHz. Remote sensing utilizing the Zeeman effect gives information about the magnetic field in the volume where the emissions originate, which in this case is around 80 km altitude near the mesopause. In addition to the magnetic field, also highly precise line-of-sight neutral wind and temperature measurements can be retrieved. This presentation will give an overview of the EZIE mission and details about the anticipated wind retrieval, such as expected precision, flexible observing geometry, and location. To gain further insights into the ability to capture the local wind system we use high-resolution Whole Atmosphere Community Climate Model eXtended (WACCM-X) runs to test the wind analysis algorithm. As a possible EZIE data product, we will demonstrate how 2-dimensional (latitude-longitude) maps of the horizontal wind around the satellites' paths can be obtained by fitting the line-of-sight measurements with the Spherical elementary current system (SECS) method.