SSC Seminar Series: GOLD Observations of Traveling Atmospheric Disturbances
Wednesday, October 19, 2022 - 3:00pm to 4:00pm
Speaker: Scott England
Virginia Polytechnic Institute and State University
Full title: GOLD Observations of Traveling Atmospheric Disturbances - What we can learn from 4 years of observations
Abstract: Traveling atmospheric disturbances (TADs) are ubiquitous in the upper atmosphere. It is believed that they are often closely related to ionospheric perturbations known as traveling ionospheric disturbances (TIDs). While observations of TIDs are relatively commonplace, owing to them being relatively easy to identify from ground-based instruments such as GNSS receivers, observations of TADs are comparatively rare. Far UV observations from space offer one way of observing the middle thermosphere, where abundant photoelectrons produce Far UV airglow. During several campaigns, GOLD has been able to identify TADs in this region. Owing to its extended field of view, GOLD is also able to track the motion of these TADs over wide ranges of latitude. This allows properties of these waves such as their periods, propagation velocities and amplitudes to be deduced. Here we present a survey of all the TADs observed by GOLD during these campaigns, the range of properties seen, and compare these to ground-based GNSS observations of concurrent TIDs.
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