Observations and Modeling of Thermospheric Neutral Winds over Millstone Hill (original) (raw)

Abstract

F-region night-time neutral winds at Millstone Hill Observatory have been studied using a Fabry-Perot Interferometer (FPI) from a nine month period between April, 2010 to December 2010. This paper discusses monthly variations in these night-time thermospheric winds near 250 km during periods of geomagnetically quiet times (Kp < 3). A detailed comparison is made between the FPI neutral winds and predictions from the NCAR Thermosphere-Ionosphere-Mesosphere Electrodynamics General Circulation Model (TIMEGCM). During the April-September period, the observed wind circulation pattern shows flows that are poleward and westward in the morning sector, equatorward near the local mid-night, and poleward and eastward in the evening sector. Thermospheric wind circulation during the October-December period is poleward during the evening and morning sectors and equator near the local midnight. The TIMEGCM thermospheric wind predictions at Millstone Hill are in good agreement with the FPI observ...

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