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Showing 1 to 20 of 248 for “"ionospheric"”.
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Ionospheric Simulator (IonSim): Simulating Ionospheric conditions in a vacuum chamber
Understanding and improving ionospheric models is important for both military and civilian purposes. This understanding improves prediction of radio propagation used for communication and GPS navigation. Various space-borne instruments, such as retarding potential analyzers (RPAs) and ion traps are …
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Ionospheric Disturbances: Midlatitude Pi2 Magnetospheric ULF Pulsations and Medium Scale Traveling Ionospheric Disturbances
… magnetosphere, and the neutral atmosphere. The ionospheric state can significantly impact technological systems, especially those which utilize radio frequency energy. By studying ionospheric disturbances, it is possible to gain a deeper understanding of not only the ionosphere itself, but also …
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Pulse Coding for ionospheric radar
CADI (Canadian Advanced Digital Ionosonde) is an active radar, which is used to probe the structure and motion of the ionosphere, such as virtual height, drift velocity, angle of arrival, echo intensity, etc. It is mainly composed of a control platform (like a personal computer PC), the plug-in DDS …
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A sudden ionospheric disturbances monitor
Sudden Ionospheric Disturbances are the immediate effects of solar flares, which impact the earth, and affect the upper atmospheric layers used for telecommunications. The aim of this project was to research, design and build a sudden ionospheric Disturbance Monitor for amplitude and phase …
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Ionospheric imaging with compressed sensing
… how ideas from compressed sensing can benefit ionospheric imaging in two ways. Compressed sensing suggests signal reconstruction techniques that take advantage of sparsity, offering us new ways of interpreting data, especially for undersampled problems. One example is radar imaging. We explain …
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Ionospheric imaging using computerized tomography
… in the ionosphere. The necessary data are transionospheric satellite beacon total electron content (TEC) data recorded simultaneously at multiple ground stations.
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Optical Emissions Generated During Ionospheric Heating
<p>Ionospheric heating, accomplished by transmitting a high-frequency electromagnetic wave into the atmosphere, stimulates a large number of linear and non-linear wave-plasma interactions. One outcome of these interactions is the acceleration of thermal ionospheric electrons, leading to the …
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Development and applications of ionospheric tomography
Recently, several tomographic techniques for ionospheric electron density imaging have been proposed. These techniques reconstruct a vertical slice image of electron density using total electron content data. The data are measured between a low orbit beacon satellite and fixed receivers located …
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Ionospheric perturbations and Schumann resonance data,
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Geology and Geophysics, 1967.
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Long term statistical studies of ionospheric absorption
An intelligent, user friendly and powerful toolkit has been designed and implemented in MATLAB to enable statistical analysis on IRIS data. This toolkit provides a catalogue of analysed IRIS data and statistical analysis in automated and efficient manner. The end results are histograms, tables and …
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Ionospheric Sounding During a Total Solar Eclipse
The ionosphere is a constantly changing medium. From the sun to cosmic rays, the ionosphere proves to be a continually interesting area of study. The most notable change that occurs in the ionosphere is the day and night cycle. The ionosphere is not a singular medium, but rather made up of …
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Empirical Ionospheric Models: The Road To Conductivity
… and research. Recent interest in polar ionospheric conductivity has led to a community-wide campaign to develop our understanding of this portion of the electrodynamic system. Characterizing the interactions between the solar wind and the polar ionosphere is a difficult task, as the …
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A forward model for ionospheric soundings and its use with incoherent scatter radar data to obtain ionospheric plasma density profiles
Submission original under an indefinite embargo labeled 'Open Access'. The submission was exported from vireo on 2022-11-11 without embargo terms
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A forward model for ionospheric soundings and its use with incoherent scatter radar data to obtain ionospheric plasma density profiles
Submission original under an indefinite embargo labeled 'Open Access'. The submission was exported from vireo on 2022-11-11 without embargo terms
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The Co-Volcanic Ionospheric Disturbances at Mt.Etna, Italy
… and navigation, are now widely used for ionospheric sounding. Due to the dispersive nature for radio waves, the ionosphere affects the GNSS signals as a function of its electron density. By this condition the total electron content (TEC) of the ionosphere can be estimated from GNSS data. …
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Improved observational programs for the Arecibo ionospheric observatory
A new set of ionospheric data taking programs have been completed for the Arecibo Ionospheric Observatory. One will cover the 200-2000 km range and measure electron number densities, temperatures and composition with a time resolution of 25 min. at low altitudes and 1 and one-fourth hrs. at high …
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