Zobrazeno 1 - 10
of 41
pro vyhledávání: '"S. R. Prabhakaran Nayar"'
Autor:
S. R. Prabhakaran Nayar, T. J. Mathew, C. V. Sreehari, S. G. Sumod, C. V. Devasia, S. Ravindran, V. Sreeja, T. Kumar Pant, R. Sridharan
Publikováno v:
Annales Geophysicae, Vol 27, Pp 107-111 (2009)
The electrodynamics of the pre-sunrise equatorial F-region is investigated using HF Doppler radar and digital ionosonde. The observations are limited to those days for which the radar probing frequency is below the foF2 value. The ionosphere obser
Externí odkaz:
https://doaj.org/article/ace226b548414cafa9430b391f69bfd6
Autor:
S. R. Prabhakaran Nayar, L. T. Alexander, V. N. Radhika, T. John, P. Subrahmanyam, P. Chopra, M. Bahl, H. K. Maini, V. Singh, D. Singh, S. C. Garg
Publikováno v:
Annales Geophysicae, Vol 22, Pp 1665-1674 (2004)
The electron and ion temperature at the low-latitude ionosphere exhibits a wide variety of fluctuations. Observations using SROSS-C2 satellite RPA payload during 1995–2000 provide an excellent opportunity to study the fluctuations in Te and Ti i
Externí odkaz:
https://doaj.org/article/7135a8072d9243a5a7657a3d11ac0d8f
Autor:
S. R. Prabhakaran Nayar, S. Sreeletha
Publikováno v:
Annales Geophysicae, Vol 21, Pp 1183-1195 (2003)
The vertical fluxes of horizontal momentum at tropospheric heights are calculated for four days, 25–28 August 1999. The mean zonal wind during these days show the presence of strong westward wind at the upper troposphere. Both the symmetric b
Externí odkaz:
https://doaj.org/article/a305c8e218d54996986a0261b3edc7bc
Publikováno v:
Annales Geophysicae, Vol 19, Pp 1001-1005 (2001)
The vertical velocity in the troposphere-lower stratosphere region measured using MST radar has been utilized to evaluate the temperature profile in the region. The diurnal variation of the tropospheric temperature on one day in August 1998 at
Externí odkaz:
https://doaj.org/article/0082bb87cafa4f02a0c495a2e7c07a37
Autor:
B. Bala, S. R. Prabhakaran Nayar
Publikováno v:
Annales Geophysicae, Vol 13, Pp 807-814 (1995)
The solar wind velocity distribution in the heliosphere is best represented using a v-map, where velocity contours are plotted in heliographic latitude-longitude coordinates. It has already been established that low-speed regions of the solar wind
Externí odkaz:
https://doaj.org/article/c6cbed3f35cb4efe82343bf62eb440be
Autor:
B. Bala, S. R. Prabhakaran Nayar
Publikováno v:
Annales Geophysicae, Vol 13, Pp 807-814 (1995)
Annales Geophysicae, Vol 13, Iss 8, Pp 807-814 (0000)
Annales Geophysicae, Vol 13, Iss 8, Pp 807-814 (0000)
The solar wind velocity distribution in the heliosphere is best represented using a v-map, where velocity contours are plotted in heliographic latitude-longitude coordinates. It has already been established that low-speed regions of the solar wind on
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::258b459931c1a0d9a8dc40ba5da852e3
https://www.ann-geophys.net/13/807/1995/
https://www.ann-geophys.net/13/807/1995/
Publikováno v:
Journal of Atmospheric and Solar-Terrestrial Physics. 86:1-5
We investigate the X ray and UV flux changes during flare events and the corresponding ionospheric response. The study reveals that UV flux enhancement depends on both flare intensity and position on solar disk while X-ray flux enhancement depends on
Autor:
Tiju Joseph Mathew, C. V. Sreehari, C. V. Devasia, S. G. Sumod, S. R. Prabhakaran Nayar, V. Sreeja, Sudha Ravindran, R. Sridharan, T. Kumar Pant
Publikováno v:
Annales Geophysicae, Vol 27, Iss 1, Pp 107-111 (2009)
Annales Geophysicae, Vol 27, Pp 107-111 (2009)
Annales Geophysicae, Vol 27, Pp 107-111 (2009)
The electrodynamics of the pre-sunrise equatorial F-region is investigated using HF Doppler radar and digital ionosonde. The observations are limited to those days for which the radar probing frequency is below the foF2 value. The ionosphere observat
Publikováno v:
Solar Physics. 252:195-207
The distribution of the shocks in the heliosphere and their characteristic variations are investigated using Ulysses observations. The jumps in solar wind velocity, IMF magnitude, and proton density across the shocks and discontinuities are evaluated
Publikováno v:
Solar Physics. 228:43-53
Fractal concepts are used to describe the irregular structures and regions of interest of solar images. The most common and easiest way to extract regions of interest from an image is through segmentation. Segmentation techniques vary from convention