Low-latitude mesospheric vertical winds observed using VHF radar
نویسندگان
چکیده
منابع مشابه
Seasonal variabilities of low-latitude mesospheric winds
Observations of mesospheric winds over a period of four years with the partial re ̄ection radar at Tirunelveli (8.7°N, 77.8°E), India, are presented in this study. The emphasis is on describing seasonal variabilities in mean zonal and meridional winds in the altitude region 70±98 km. The meridional winds exhibit overall transequatorial ̄ow associated with dierential heating in the Northern and ...
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The first results of simultaneous observations made on the low-latitude field-aligned irregularities (FAI) using the MST radar located at Gadanki (13.5 N, 79.2 E, dip 12.5) and the Es parameters using an ionosonde at a nearby station Sriharikota (13.7 N, 80.1 E, dip 12.6) are presented. The observations show that while the height of the most intense radar echoes is below the virtual height of E...
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The Rayleigh lidar data collected on 119 nights from March 1998 to February 2000 were used to study the statistical characteristics of the low latitude mesospheric temperature inversion observed over Gadanki (13.5 N, 79.2 E), India. The occurrence frequency of the inversion showed semiannual variation with maxima in the equinoxes and minima in the summer and winter, which was quite different fr...
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This paper presents observations of low-altitude mid-latitude E-region irregularities obtained with the 52MHz Chung-Li VHF radar. These are carried out in the interferometer mode to investigate the behavior of these irregularities over time and space. The observations presented here show the characteristics of type-II echoes noted by a negative slope, i.e. they are approaching the radar as a fu...
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The VHF radar system at Aberystwyth (52:4 N, 4:1 E) has been used to make high-timeresolution, multi-beam observations of mesospheric summer echo layers. These show that the altitude and the sense of vertical movement of the layers can vary over time-scales of minutes and horizontal scales of kilometres. In general, the altitude pro®les of signal-tonoise ratio provide evidence of a bifurcated s...
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ژورنال
عنوان ژورنال: Journal of Geophysical Research: Atmospheres
سال: 2011
ISSN: 0148-0227
DOI: 10.1029/2011jd016385