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.
Results
Showing 1 to 19 of 19 for “"E region"”.
-
E-Region Ionization and Thermal Structure
Made available in DSpace on 2014-12-08T22:24:12Z (GMT). No. of bitstreams: 1 6711895.pdf: 5880066 bytes, checksum: f241cbc5036f9f5185671ceb3b150909 (MD5) Previous issue date: 1967
-
General circulation of the E-region
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Meteorology, 1964.
-
Formation of small-scale irregularities in the auroral E region
… and decameter) irregularities in the auroral E region is advanced, both theoretically and experimentally. In the theoretical part of the thesis, the linear fluid theory of the Farley-Buneman (F-B) and gradient drift (G-D) plasma instabilities is considered. A general 2-D dispersion equation is …
-
An Investigation of Odd Nitrogen in the Ionospheric E Region
Made available in DSpace on 2014-12-10T19:07:23Z (GMT). No. of bitstreams: 1 7511689.pdf: 7097015 bytes, checksum: 709d693387191aedeaf3b073e0207ca3 (MD5) Previous issue date: 1974
-
VHF and UHF radar observations of postsunset e-region turbulence with ALTAIR
U of I Only Restriction set for Item 119541 on 2021-10-08T16:28:20Z with date by astein@illinois.edu.
-
Incoherent scatter radar detection of enhanced plasma line in ionospheric E-region over Arecibo
… was quite frequently seen in the ionospheric E-region. We hypothesized that the E-region plasma line enhancement over Arecibo was caused by precipitated electrons from the radiation belts. The precipitated electrons will enhance the population of suprathermal electrons in the E-region. …
-
VHF Radar Studies of the Mid-Latitude E-Region Ionosphere From Camp Santiago, Puerto Rico
… plasma layers that are being dumped at lower E-region altitudes due to the action of gravity waves. Overall, a striking result is the lack of QP echoes in the Puerto Rican sector compared to other mid-latitude observation sites. Finally, we conclude that current QP models contain the right ideas …
-
Variations Of E-Region Total Electron Content And Electron Density Profiles Over High Latitudes During Winter Solstice 2007 Using Radio Occultation Measurements
… but also on the upper atmosphere and outer space region. Therefore, it is essential to improve the understanding of the impacts of space weather conditions on the ionosphere. This research focuses on the variation of total electron content (TEC) and the electron density within the E-region of the …
-
Total Electron Content During Auroral Conditions
… as a function of altitude for E and lower F regions is used to calculate electron density height profiles for the approximately vertical, polar geomagnetic field lines that may be traced upwards in the field of view of the photometers. Total electron content obtained by summing across field …
-
Low Cost Magnetometer Calibration and Distributed Simultaneous Multipoint Ionospheric Measurements from a Sounding Rocket Platform
… for measuring currents that flow in the E-region ionosphere. This thesis will cover the magnetometer calibration process used for these sounding rocket missions, the calibration results, and some analysis of the flight data. For the first time, distributed multi-point and temporally-spaced …
-
End depth and flow relationships for smooth open trapezoidal and circular channels
… nature of the flow in the Y$\sb{\rm e}$ region. The present investigation improves on existing studies in several ways. (1) The velocities over the entire end depth and critical depth sections for circular and trapezoidal cross sectional channels were measured over a range of flow …
-
Evaluating the Capability of ICON-MIGHTI to Detect Plasma Bubbles in the Ionosphere
… potentially indicative of plasma bubbles: regions of low-density E-region plasma which rise through the F-region and cause radio scintillation that interferes with communications and GPS performance. Here, we explore the possibility of MIGHTI observing plasma bubbles by using its red-line …
-
Using the single-cycle flavivirus particle replivax to study flavivirus replication and immune response
… demonstrated that mutations in the DENV prM/E region increased the specific infectivity of the chimeric virus particles. Also, it was shown that mutations in the WNV NS2A/NS3 region independently improved the encapsidation of virions without altering genome replication, indicating a functional …
-
Replication and Silencing at the Hmr-E Compound Origin in Saccharomyces Cerevisiae
… locus. Within this locus, an 868 base pair (bp) region termed HMR-E functions as both a silencer and an origin of DNA replication. Replication activity assays of the HMR-E region revealed that it consisted of not one, but a minimum of three independent subregions capable of ARS (autonomously …
-
Long-term investigation of the lunar tide in the equatorial electrojet during stratospheric sudden warmings
… tides are fundamental for the ionospheric E-region wind dynamo that generates electric fields and currents in the ionosphere. Observations of ionospheric currents indicate a large enhancement of the semidiurnal lunar tide in response to SSW events. Thus, the semidiurnal lunar tide becomes an …
-
Non-Linear Magnetosphere-Ionosphere Interactions at High Latitudes
… ionosphere by changing the conductivity in the E-region when the large-scale electric field exists in the heating region.</p> <p>The importance of the Hall currents in magnetosphere-ionosphere interactions, carried by ULF waves and field-aligned currents, has been consistently overlooked in …
-
Radio Propagation Through Density Irregularities in the Auroral Ionosphere
… is commonly seen in equatorial and high-latitude regions. This study centers around the scintillation and its causative plasma processes that dominantly happen in the high-latitude ionosphere over the auroral regions (or the auroral ionosphere where we see northern and southern lights). The aim of …
-
Effects of solar particle events on Geospace
… events driven by co-rotating interaction regions associated with fast solar wind streams from trans-equatorial coronal holes. A small proportion of these particles, of which protons are by far the most significant for our purposes, deposit their magnetic and kinetic energy within geospace …
-
The Mid-Latitude Ionosphere: Modeling and Analysis of Plasma Wave Irregularities and the Potential Impact on GPS Signals
… under disturbed conditions of the mid-latitude F-region ionosphere. The TGI and GDI wave cascading lends further support to the belief that the E-region may be responsible for shorting out the F-region TGI and GDI electric fields before and around sunset and ultimately leading to irregularity …