Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 7 of 7 for “"spread-f"”.
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Growth rate simulations of instability mechanisms at low and mid-latitudes for explaining equatorial spread F
… the characteristics and behavior of Equatorial Spread F (ESF). The general seasonalities of ESF occurrence are well known, but much work remains to be done in learning its day--to--day variability. Understanding the complexities of the ionosphere is important for communication systems whose …
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Incoherent scatter radar detection of enhanced plasma line in ionospheric E-region over Arecibo
… of this thesis. Finally, we also introduce the Spread F Index (SFI) as a convenient bookkeeping method to summarize spread F condition over a certain period of time.
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A Study on Several Radar Techniques Used for the Estimation of Ionospheric Plasma Drifts
… good accord with the bulk plasma motion during spread-F events.
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Radio and Optical Techniques for Locating Equatorial Plasma Irregularities
… a few centimeters to thousands of kilometers. Spread-F, the disruption of ionospheric measurements with ionosondes and incoherent scatter radar, and scintillation (fading) of trans-ionospheric radio communication and navigation signals are well-known symptoms of depletions. This dissertation …
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Using a bistatic Fabry-Perot interferometer system to improve the estimation of thermospheric winds
… trans- atmospheric radio waves is equatorial spread F (ESF). The Rayleigh-Taylor instability (RTI) causes the development of many types of ESF events. It has been theorized that thermospheric winds have a substantial e ect on the growth rate of the RTI, but very little data has been gathered …
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2-D radio imaging of equatorial ionospheric plasma depletions with the C/NOFS satellite: algorithms and results
… ionospheric electron density, known as spread-F events, have been an active area of scientific research in the last decades. These are of special interest to the research community because of their potentially deleterious impact on trans-ionospheric communication links and navigation …
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Investigation of Radar Interferometric Techniques With Application to the Atmosphere
… An example of this is demonstrated with the spread-F data collected at Jicamarca Radio Observatory, located near Lima, Peru. The zonal and vertical components of the drift velocity of distinct irregularity patches within the radar field of view are estimated using a combination of Doppler and …