Items where Author is "Sekar, R."

Chakrabarty, D. ; Hui, D. ; Rout, D. ; Sekar, R. ; Bhattacharyya, Archana ; Reeves, G. D. ; Ruohoniemi, J. M. (2017) Role of IMF B_y in the prompt electric field disturbances over equatorial ionosphere during a space weather event Journal of Geophysical Research: Space Physics, 122 (2). pp. 2574-2588. ISSN 0148-0227

Sekar, R. ; Chakrabarty, D. ; Narayanan, R. ; Patra, A. K. (2008) Equatorial spread F structures and associated airglow intensity variations observed over Gadanki Annales Geophysicae, 26 (12). pp. 3863-3873. ISSN 0992-7689

Kelley, M. C. ; Nicolls, M. J. ; Anderson, D. ; Anghel, A. ; Chau, J. L. ; Sekar, R. ; Subbarao, K. S. V. ; Bhattacharyya, A. (2007) Multi-longitude case studies comparing the interplanetary and equatorial ionospheric electric fields using an empirical model Journal of Atmospheric and Solar-Terrestrial Physics, 69 (10-11). pp. 1174-1181. ISSN 1364-6826

Sekar, R. ; Chakrabarty, D. ; Sarkhel, S. ; Patra, A. K. ; Devasia, C. V. ; Kelley, M. C. (2007) Identification of active fossil bubbles based on coordinated VHF radar and airglow measurements Annales Geophysicae, 25 (10). pp. 2099-2102. ISSN 0755-0685

Pant, Tarun Kumar ; Tiwari, Diwakar ; Vineeth, C. ; Thampi, Smitha V. ; Sridharan, S. ; Devasia, C. V. ; Sridharan, R. ; Gurubaran, S. ; Sekar, R. (2007) Investigation on the mesopause energetics and its possible implications on the equatorial MLTI processes through coordinated daytime airglow and radar measurements Geophysical Research Letters, 34 . L15102_1-L15102_6. ISSN 0094-8276

Chakrabarty, D. ; Sekar, R. ; Narayanan, R. ; Patra, A. K. ; Devasia, C. V. (2006) Effects of interplanetary electric field on the development of an equatorial spread F event Journal of Geophysical Research, 111 . A12316_1-A12316_7. ISSN 0148-0227

Patra, A. K. ; Tiwari, D. ; Sripathi, S. ; Rao, P. B. ; Sridharan, R. ; Devasia, C. V. ; Viswanathan, K. S. ; Subbarao, K. S. V. ; Sekar, R. ; Kherani, E. A. (2005) Simultaneous radar observations of meter-scale F region irregularities at and off the magnetic equator over India Journal of Geophysical Research, 110 (A2). A02307_1-A02307_11. ISSN 0148-0227

Sekar, R. ; Chakrabarty, D. ; Narayanan, R. ; Sripathi, S. ; Patra, A. K. ; Subbarao, K. S. V. (2004) Characterization of VHF radar observations associated with equatorial Spread F by narrow-band optical measurements Annales Geophysicae, 22 (9). pp. 3129-3136. ISSN 0992-7689

Pant, T. K. ; Tiwari, D. ; Sridharan, S. ; Sridharan, R. ; Gurubaran, S. ; Subbarao, K. S. V. ; Sekar, R. (2004) Evidence for direct solar control of the mesopause dynamics through dayglow and radar measurements Annales Geophysicae, 22 (9). pp. 3299-3303. ISSN 0992-7689

Kulshrestha, U. C. ; Kulshrestha, Monika J. ; Sekar, R. ; Sastry, G. S. R. ; Vairamani, M. (2003) Chemical characteristics of rainwater at an urban site of South-central India Atmospheric Environment, 37 (21). pp. 3019-3026. ISSN 1352-2310

Sekar, R. ; Ravi Prasad, P. ; Vairamani, M. (2003) Determination of acetyl salicylic acid and related impurities in pharmaceutical prepartations and bulk drugs by capillary electrophoresis Indian Journal of Chemical technology, 10 . pp. 603-606. ISSN 0971-457X

Sekar, R. ; Kulshrestha, U. C. ; Vairamani, M. (2001) Separation and determination of 3,4-dimethoxybenzaldehyde and related compounds by high performance capillary electrophoresis Indian Journal of Chemistry - Section A: Inorganic, Physical, Theoretical and Analytical Chemistry, 40 . pp. 662-665. ISSN 0376-4710

Kulshrestha, U. C. ; Jain, Monika ; Sekar, R. ; Vairamani, M. ; Sarkar, A. K. ; Parashar, D. C. (2001) Chemical characteristics and source apportionment of aerosols over Indian Ocean during INDOEX-1999 Current Science, 80 (10). pp. 180-185. ISSN 0011-3891

Sekar, R. ; Kherani, E. A. ; Rao, P. B. ; Patra, A. K. (2001) Interaction of two long-wavelength modes in the nonlinear numerical simulation model of equatorial spread F Journal of Geophysical Research, 106 (A11). pp. 24765-24775. ISSN 0148-0227

Kulshrestha, Umesh C. ; Kulshrestha, Monika J. ; Sekar, R. ; Vairamani, M. ; Sarkar, Ajit K. ; Parashar, Danesh C. (2001) Investigation of alkaline nature of rain water in India Water, Air, & Soil Pollution, 130 (1-4). pp. 1685-1690. ISSN 0049-6979

Sekar, R. ; Kherani, E. A. ; Viswanathan, K. S. ; Devasia, C. V. ; Subbarao, K. S. V. ; Tiwari, D. ; Ramachandran, N. ; Patra, A. K. ; Rao, P. B. (2000) Preliminary results on equatorial spread F irregularities by VHF and HF radars Indian Journal of Radio and Space Physics, 29 (4). pp. 262-271. ISSN 0367-8393

Sridharan, R. ; Chandra, H. ; Das, S. R. ; Sekar, R. ; Sinha, H. S. S. ; Pallam Raju, D. ; Narayanan, R. ; Raizada, Shika ; Misra, R. N. ; Raghavarao, R. ; Vyas, G. D. ; Rao, P. B. ; Ramarao, P. V. S. ; Somayajulu, V. V. ; Babu, V. V. ; Danilov, A. D. (1997) Ionization hole campaign-a coordinated rocket and ground-based study at the onset of equatorial spread-F: first results Journal of Atmospheric and Solar-Terrestrial Physics, 59 (16). pp. 2051-2067. ISSN 1364-6826

Sekar, R. ; Sridharan, R. ; Raghavarao, R. (1997) Equatorial plasma bubble evolution and its role in the generation of irregularities in the lower F region Journal of Geophysical Research, 102 (A9). pp. 20063-20067. ISSN 0148-0227

Sekar, R. ; Gurubaran, S. ; Sridharan, R. (1993) All sky imaging Fabry-Perot spectrometer for optical investigation of the upper atmosphere Indian Journal of Radio and Space Physics, 22 (3). pp. 197-204. ISSN 0367-8393

Sekar, R. ; Sridharan, R. (1992) Validity of the estimates of night-time meridional winds made from bottomside ionograms Journal of Atmospheric and Terrestrial Physics, 54 (9). pp. 1197-1199. ISSN 0021-9169

Sridharan, R. ; Haider, S. A. ; Gurubaran, S. ; Sekar, R. ; Narayanan, R. (1992) O I 630.0-nm dayglow in the region of equatorial ionization anomaly: temporal variability and its causative mechanism Journal of Geophysical Research, 97 (A09). pp. 13715-13721. ISSN 0148-0227

Sridharan, R. ; Raghavarao, R. ; Suhasini, R. ; Narayanan, R. ; Sekar, R. ; Babu, V. V. ; Sudhakar, V. (1989) Winds, wind-shears and plasma densities during the initial phase of a magnetic storm from equatorial latitudes Journal of Atmospheric and Terrestrial Physics, 51 (3). pp. 169-177. ISSN 0021-9169

Raghavarao, R. ; Gupta, S. P. ; Sekar, R. ; Narayanan, R. ; Desai, J. N. ; Sridharan, R. ; Babu, V. V. ; Sudhakar, V. (1987) In situ measurements of winds, electric fields and electron densities at the onset of equatorial spread-F Journal of Atmospheric and Solar - Terrestrial Physics, 49 (5). pp. 485-492. ISSN 1364-6826

Gupta, Ranjan ; Desai, J. N. ; Raghavarao, R. ; Sekar, R. ; Sridharan, R. ; Narayanan, R. (1986) Excess heating over the equatorial latitudes during storm sudden commencement Geophysical Research Letters, 13 (10). pp. 1055-1058. ISSN 0094-8276

Venkatachalappa, M. ; Sekar, R. ; Rudraiah, N. (1983) Finite amplitude tidal waves at the interface between two fluid saturated porous media (Eng) Indian Journal of Pure and Applied Mathematics, 14 (2). pp. 207-212. ISSN 0019-5588

Rudraiah, N. ; Venkatachalappa, M. ; Sekar, R. (1982) Propagation of hydromagnetic waves in a rotating nonisothermal compressible atmosphere: WKB approximation Physics of Fluids: Fluid Dynamics, 25 (9). pp. 1558-1561. ISSN 0899-8213