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.
Schedule: Check out this season's Space Science Seminar Series