Observations of Unusual Travelling Ionospheric Disturbances (TIDs) and Enhancements in Mid-Latitude E Region Irregularity Backscatter

Computer Science – Sound

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2435 Ionospheric Disturbances, 2439 Ionospheric Irregularities, 2443 Midlatitude Ionosphere, 2704 Auroral Phenomena (2407), 2712 Electric Fields (2411)

Scientific paper

The SuperDARN HF radar at NASA Wallops Flight Facility observed unusual enhancements in the backscattered power from the E region ionosphere around the time of a heavily instrumented sounding rocket launch in October 2007. This activity appeared to coincide with the passage of remarkable TIDs that were due to equatorward propagating atmospheric gravity waves. We discuss the observations and their interpretation in terms of irregularity formation in sporadic E Layers and seeding by TIDs. We make comparisons with the diagnostics of TIDs, sporadic E, and spread F that were carried out in support of the rocket launch. We show how the unusual activity can be traced continuously with the long-range radar observations to the onset of disturbance at high latitudes.

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