Field aligned irregularities
WebJan 15, 2024 · According to the field-aligned feature, we estimated the locations of the irregularities. On the basis of rationality and easy operation, broad-beam antennas … 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 …
Field aligned irregularities
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Webaligned irregularities obtained with the Piura VHF radar. This radar is located at ∼7.0 dip latitude, just outside the equatorial electrojet (EEJ) region. WebAbstract. We report on the field-aligned irregularities observed in the low-latitude sporadic E-layer (Es) with the Gadanki (13.5° N, 79.2° E; geomagnetic latitude 6.3° N) VHF radar. The radar was operated intermittently for 15 days during the summer months in 1998 and 1999, for both daytime and nighttime observation.
WebIncentives and pressures aligned with a vision of zero. Leaders often spending too much time managing the injury. ... • Critical Hazard Field Guide • Verification (GPS location) • … 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.
WebMay 8, 2009 · [1] We report simultaneous observations of medium-scale traveling ionospheric disturbances (MSTIDs) and field-aligned irregularities (FAIs) in the F region using two all-sky airglow imagers and the middle and upper atmosphere (MU) radar. MSTIDs propagating southwestward were observed simultaneously in 630-nm airglow …
WebJan 1, 2006 · The properties and behaviour of artificial field-aligned small-scale irregularities (striations) in the nightside high latitudinal F-region in course of the Tromsø ionospheric modification experiments are studied. Experimental studies have been performed by the use of phased array 1 with a beamwidth of 6° instead of 12–14° in …
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 ... forest park zoo springfield maWebOct 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 … forest path dnd 5eWebMay 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 … dietary changes after nephrectomyWebJan 1, 2012 · The F-region field-aligned irregularities (FAIs) observed by this radar from February 2006 to December 2010 during a solar minimum period have been analyzed and found that FAIs appeared frequently ... forest pathology wileyWebMultireceiver 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 … forest pathology masters programWebOct 22, 2024 · We propose that medium- to large-scale HF-induced field-aligned irregularities (tens to hundreds of metres scale) act to refract … forest pathology wikipediaWebOct 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 … forest park zoo springfield massachusetts