low latitude E-region
THE INFLUENCE OF NON-ISOTHERMAL ELECTRONS AND NEUTRAL WIND STRUCTURES ON THE DOPPLER PROPERTIES OF VERTICAL M-SIZE FIELD-ALIGNED IRREGULARITIES IN THE LOW LATITUDE E-REGION
... There are two broad types of echoes being described when dealing with E-region radar backscatter echoes. So-called Type I echoes are relatively narrow and move with a Doppler shift compa- rable to the ion-acoustic ...
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Three-dimensional tracking of mid-latitude quasi-periodic E-region echoes observed with the Chung-Li VHF radar
... Recently, a striking finding was reported by Rao et al. (2000) by carrying out multi-beam high resolution MU radar observations, Urbina et al. (2000) by simultaneously operating a 50-MHz radar interferometer at Camp ...
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Low-latitude scintillation occurrences around the equatorial anomaly crest over Indonesia
... a low-latitude region; (4) distribution of scintilla- tion occurrences at Pontianak are concentrated in the south- ern sky, especially in the southwest direction, which is very likely associated with ...
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Latitudinal extension of low-latitude scintillations measured with a network of GPS receivers
... of kilometers down to sub-meter sizes. A basic understand- ing of ESF has been obtained due to insights from Jicamarca measurements (Woodman and LaHoz, 1976), satellite in-situ observations (McClure et al., 1977), and ...
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Simultaneous high- and low-latitude reconnection: ESR and DMSP observations
... the low-latitude cusp and sun- ward in the high-latitude ...the low-latitude cusp and, therefore, the flow ...flow region) is observed near noon in the morning sector (around ...
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A comparative study on chaoticity of equatorial/low latitude ionosphere over Indian subcontinent during geomagnetically quiet and disturbed periods
... Indian region encompasses the equatorial and low-latitude ...equatorial region is nearly parallel to the Earth’s ...magnetic latitude to the north and south of the magnetic equator ...
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Ion and neutral temperature distributions in the E-region observed by the EISCAT Tromsø and Svalbard radars
... the low- latitude boundary of the polar cap and the cusp was greater and more variable than that in the auroral ...the low latitude boundary of the polar cap and the cusp, or the heat ...
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Field-aligned current associated with low-latitude plasma blobs as observed by the CHAMP satellite
... and the latter 16 (e.g. Fig. 2) are blob bottomsides showing faint signatures. For the remaining 34 blobs the maximum zonal/meridional magnetic deflections are larger than 0.2 nT, but the linearly polarized signature of ...
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Mid-latitude <i>E</i>-region bulk motions inferred from digital ionosonde and HF radar measurements
... the low drift magnitudes at mid-latitudes, but should be sufficient; 3) averaging can reduce drift speed measurements, but it was essential in helping overcome the effects of man-made inter- ference which ...
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Rev. Bras. Geof. vol.25 suppl.2
... choeira Paulista. Mean cross-spectra were computed for 7 equally spaced height intervals using 10-day meridional wind segments and the results for day intervals 226-235, 370-379 and 390-399, are shown in the Figure 5. ...
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MESOSPHERIC 2-DAY WAVES OBSERVED SIMULTANEOUSLY IN THE EQUATORIAL AND LOW LATITUDES REGIONS OF BRAZIL
... RESUMO. Este trabalho tem como base medidas dos ventos da parte superior da mesosfera e da baixa termosfera obtidas simultaneamente atrav´es de radares mete´oricos em S˜ao Jo˜ao do Cariri (7.4 ◦ S, 36.5 ◦ O) e Cachoeira ...
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Arq Bras Endocrinol Metab vol.58 número5
... a latitude e o fototipo de ...alta latitude; no entanto, a hipovitaminose D é comumente encontrada em regiões tropicais como o ...alta latitude em que os extremos de fototipos de pele foram ...
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Potential of the future thermal infrared space-borne sensor IASI-NG to monitor lower tropospheric ozone
... review done by Martin (2008). In the last few years, the use of satellites for the ob- servation of relevant AQ parameters, like LT ozone concentration or other trace gases associated to air pollution, has undergone ...
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Low frequency geomagnetic field fluctuations at low latitude during the passage of a higher pressure solar wind region
... The dynamic power spectra shown in the right side of Fig. 2 (as computed following the frequency-time anal- ysis method suggested by Dziewonski et al., 1969, with N 40 ®lters centred on logarithmically equispaced ...
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Vitamin D levels in juvenile idiopathic arthritis from an equatorial region
... Vitamin D levels were measured as the serum concen- tration of 25-hydroxyvitamin D (25OHD), in addition to serum calcium and phosphate, alkaline phosphatase, and parathyroid hormone (PTH) levels; 25OHD and PTH lev- els ...
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The Polar Vegetation Photosynthesis and Respiration Model: a parsimonious, satellite-data-driven model of high-latitude CO<sub>2</sub> exchange
... restrial region north of 55 ◦ ...high-latitude region changed from a carbon source (2001–2004) to a carbon sink (2005–2010) to again a source (2011–2012) in response to changing envi- ronmental ...
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Focus of attention and region segregation by low-level geometry
... and low-level geometry should be used to construct mid- and high-level ...at low level corners (c) and bars (b) are ...be- low semantic processing: a computer monitor in com- bination with one or ...
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Collective dynamics of bursty particle precipitation initiating in the inner and outer plasma sheet
... Fig. 3. Probability density (top row) and cumulative (bottom row) distributions of emission energy E, peak emission power W , emission lifetime T , and peak emission area A, constructed for precipitation events which ...
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Braz. J. Phys. vol.36 número3A
... The order parameter and the stationary current present strong fluctuations for densities above ρ = 0.32. The evolution of these quantities typically displays sudden jumps between the ordered and the disordered state, a ...
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Study of mid-latitude nighttime enhancement in F-region electron density using tomographic images over the UK
... Abstract. Nighttime enhancements in ionospheric electron content (IEC)/peak electron density (NmF2) have been stud- ied by various workers in the equatorial anomaly and mid- latitude regions. Such studies give an ...
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