Multi-Platform Ground-Based Observations of Meso-Scale Waves and Spread F at Midlatitudes

Details Multi-Platform Ground-Based Observations of Meso-Scale Waves and Spread F at Midlatitudes Multi-Platform Ground-Based Observations of Meso-Scale Waves and Spread F at Midlatitudes

May 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007agusmsa22a..03e&link_type=abstract

American Geophysical Union, Spring Meeting 2007, abstract #SA22A-03

Other

2435 Ionospheric Disturbances, 2443 Midlatitude Ionosphere, 2772 Plasma Waves And Instabilities (2471)

Scientific paper

Three distinctly different midlatitude spread F events were observed on separate nights during a two week period in the fall of 2006. One of the events occurred after a period of increased activity in several high latitude geomagnetic storm indices, another occurred during an extended period of magnetically quiescent conditions, and the third occurred during a moderately active period. The ionospheric and thermospheric conditions during these events were simultaneously monitored by a suite of ground-based instruments, including the Wallops Island Digisonde, a tri-static radar sensitive to traveling ionospheric disturbances (TIDs), scintillation detectors, and a network of ground-based GPS receivers. We present data from each of these systems, and contrast the observations on each night in order to investigate the ionospheric morphologies associated with each type of spreading event. Evidence of TIDs and plasma density variations are evident during the quiet-time event, while the geomagnetically active event shows a more impulsive density perturbation in the TEC data. Smaller scale turbulence and associated scintillations are evident only in two of the three cases. Plausible scenarios to explain the disparate observations will be discussed in light of these new data.

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