Field aligned irregularities
WebJun 1, 1992 · The MU radar located at Shigaraki, Japan (34.9°N, 136.1°E) can observe field-aligned irregularities in the E-region by steering its antenna beam perpendicular to the geomagnetic field.First, this paper investigates daily and seasonal variations of occurrence frequency of echoes from the irregularities. WebMultireceiver and multifrequency radar imaging were carried out with the 46.5 MHz MU radar in Japan (34.85°N and 136.10°E) to examine the aspect sensitivity of field-aligned plasma irregularities (FAIs) in the mid-latitude ionosphere E region. A radar beam was directed to geographic north and at 51° zenith angle, which was normal to the geomagnetic field …
Field aligned irregularities
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WebOct 16, 2024 · Abstract: An observation model is introduced for accurate positioning of the ionospheric field-aligned irregularities (FAIs). The model is applied to the Hainan … WebMay 14, 2009 · We report, for the first time, continuous observations of the nighttime F-region field-aligned irregularities (FAIs) over Indonesia. A VHF radar with operating frequency of 30.8 MHz and peak power of 20 kW has been operated at Kototabang (0.20°S, 100.32°E; dip latitude 10.4°S), Indonesia since February 2006. Five beams were …
WebDec 1, 2011 · We analyzed E -region field-aligned irregularities (FAIs) observed by this radar through a year of 2007 and found that the E -region FAI observed at Kototabang can be classified into two groups. One is “descending FAI”. Altitude of the FAI echo region descends with time from 102 km to 88 km altitude during 0700–1000 and 1900–0000 LT … WebMay 15, 2012 · @article{osti_22072322, title = {Modeling the propagation of whistler-mode waves in the presence of field-aligned density irregularities}, author = {Streltsov, A V and Woodroffe, J and Gekelman, W and Pribyl, P}, abstractNote = {We present a numerical study of propagation of VLF whistler-mode waves in a laboratory plasma. Our goal is to …
WebJan 3, 2024 · E-region field-aligned irregularities (FAIs) are a hot topic in space research, since electromagnetic signal propagation through ionospheric irregularities can undergo sporadic enhancements and … WebOct 16, 2024 · The two field-aligned irregularities (FAIs) appeared in the topside F2-layer and presented small Doppler velocities and narrow spectral widths. The fan sector maps …
WebOct 22, 2024 · We propose that medium- to large-scale HF-induced field-aligned irregularities (tens to hundreds of metres scale) act to refract …
WebDec 23, 2003 · The rapid upwelling of meter-scale irregularities observed by Fukao et al., which ... also in conjunction with field-aligned current closures, to establish a divergence free current flow; these secondary polarization fields can also map up to the F region and cause westward plasma transport. Also, a westward field might prevail between the ... mt white restaurantsWebFeb 26, 2024 · We present experimental results concentrating on the features and evolution, generation conditions and mechanisms of small-scale field-aligned irregularities (FAIs) in the high latitude ionosphere ... mt whitfieldWebIt is concluded that the Esc region commonly contains field-aligned ionization. 1. INTRODUCTION PREVIOUS experiments by GALLAGHER (1956) demonstrated that … how to make spice teaWebIt is noteworthy that the echoing mechanism of the coherent scatter radar is the Bragg scattering from field-aligned irregularities (FAIs) in the Es layer, which is very different … how to make spicy avocado chickenWebOct 22, 2024 · Field-aligned irregularity (FAI) in the E region is also observed by Very High Frequency (VHF) radar in mid-latitude regions. FAI frequently occurs after … how to make spiced vinegarWebShaft alignment, or coupling alignment is a process in which two or more rotating shafts are arranged in a co-linear way. There are several tools and methods, which can be … how to make spicy bbq sauce from scratchWebIn addition to spread F, evidence for field-aligned electron density irregularities is commonly observed on Alouette 2 topside sounder ionograms recorded near perigee (500 km). This evidence is provided by distinctive signal returns from sounder-generated Z … mt white restaurant saddles