Items where Author is "Kumar, Sushil"

Journal Article

Maharaj, Ronald and Kumar, Sushil and Rollings, Nicholas and Antoniou, Andreas (2023) Groundwater detection using resistivity at Nubutautau village in Viti Levu in Fiji. Water, 15 (23). NA. ISSN 2073-4441

Kishore, Amol N. and Kumar, Sushil (2023) Large scale traveling ionospheric disturbances during geomagnetic storms of 17 March and 23 June 2015 in the Australian region. Journal of Geophysical Research: Space Physics, 128 (11). NA. ISSN 2169-9402

Kumar, Sarwan and Kumar, Sushil and Singh, Rajesh (2023) Geomagnetic storm associated D - Region anomalies estimated from VLF observations at a low - latitude station, Suva, Fiji. Journal of Geophysical Research: Space Physics, 128 (10). NA. ISSN 2169-9402

Chand, Atishnal E. and Kumar, Abhikesh and Kumar, Sushil (2023) VLF and ionospheric D - region perturbations associated with WWLLN - detected lightning in the South Pacific region. Journal of Geophysical Research: Space Physics, 128 (4). NA. ISSN 2169-9380

Redoblado, Paolo A. A. L. and Kumar, Sarwan and Kumar, Abhikesh and Kumar, Sushil (2022) Lightning evolution and VLF perturbations associated with category 5 TC Yasa in the South Pacific region. Earth, Planets and Space, 74 (65). pp. 1-20. ISSN 1343-8832

Kumar, Edwin A. and Kumar, Sushil (2022) Geomagnetic storm effect on F2 - region ionosphere during 2012 at Low - and Mid - Latitude - Latitude Stations in the Southern Hemisphere. Atmosphere, 13 (3). NA. ISSN 2073-4433

Kumar, Sarwan and Kumar, Sushil and Kumar, Abhikesh (2022) Earthquakes associated subionospheric VLF anomalies recorded at two low latitude stations in the South Pacific region. Journal of Atmospheric and Solar-Terrestrial Physics, 229 . NA. ISSN 1364-6826

Maurya, Ajeet K. and Pariha, Navin and Dube, Adarsh and Singh, Rajesh and Kumar, Sushil and Chanrion, Olivier and Tomicic, Maja and Neubert, Torsten (2022) Rare observations of sprites and gravity waves supporting D, E, F-regions ionospheric coupling. Scientific Reports - Nature, 12 (581). NA. ISSN 2045-2322

Sharan, Ashneel and Kumar, Sushil (2021) Long-term trends of the F2-region at mid-latitudes in the Southern Hemisphere. Journal of Atmospheric and Solar - Terrestrial Physics, 220 . p. 105683. ISSN 1364-6826

Chand, Atishnal E. and Kumar, Sushil (2021) Earth - ionosphere waveguide model parameters using VLF transmissions received in the South Pacific region. IEEE Access, 9 . pp. 56653-56663. ISSN 2169-3536

Chandra, Ashneel and Kumar, Sushil (2021) Sea surface temperature and ocean heat content during tropical cyclones Pam (2015) and Winston (2016) in the Southwest Pacific region. Monthly Weather Review, 149 (4). pp. 1173-1187. ISSN 0027-0644

Kerrache, F. and Amor, S.N. and Kumar, Sushil (2021) Ionospheric D region disturbances due to FAC and LEP associated with three severe Geomagnetic Storms as observed by VLF Signals. Journal of Geophysical Research: Space Physics, 126 (2). NA. ISSN 2156-2202

Kumar, Abhikesh and Kumar, Sushil (2020) Ionospheric D region parameters obtained using VLF measurements in the South Pacific region. Journal of Geophysical Research: Space Physics, 125 . pp. 1-18. ISSN 2156-2202

Kumar, Sushil and Kumar, Sarvesh (2020) Equatorial ionospheric TEC and scintillations under the space weather events of 4–9 September 2017: M-class solar flares and a G4 geomagnetic storm. Journal of Atmospheric and Solar-Terrestrial Physics, 209 . p. 105421. ISSN 1364-6826

Venkatesham, K. and Singh, R. and Maurya, A.K. and Dube, A. and Kumar, Sushil and Phanikumar, D.V. (2019) The 22 July 2009 Total Solar Eclipse: modeling D region Ionosphere using Narrowband VLF observations. Journal of Geophysical Research: Space Physics, 124 . pp. 616-627. ISSN 2156-2202

Kumar, Sushil and Kumar, Vickal V. (2019) Ionospheric response to the St. Patrick's Day space weather events in March 2012, 2013, and 2015 at Southern Low and Middle Latitudes. Journal of Geophysical Research: Space Physics, 124 . pp. 584-602. ISSN 2156-2202

NaitAmor, S. and Cohen, M.B. and Kumar, Sushil and Chanrion, O. and Neubert, T. (2018) VLF signal anomalies during cyclone activity in the Atlantic Ocean. Geophysical Research Letters, 45 . NA. ISSN 0094-8276

Maurya, A.K. and Venkatesham, K. and Kumar, Sushil and Singh, R. and Tiwari, P. and Singh, A. K. (2018) Effects of St. Patrick’s Day Geomagnetic Storm of March 2015 and of June 2015 on Low-Equatorial D Region Ionosphere. Journal of Geophysical Research: Space Physics, 123 . pp. 1-14. ISSN 2156-2202

Kumar, Abhikesh and Kumar, Sushil (2018) Solar flare effects on D ‑ region ionosphere using VLF measurements during low ‑ and high ‑ solar activity phases of solar cycle 24. Earth, Planets and Space, 70 (29). NA. ISSN 1343-8832

Prasad, R. and Kumar, Sushil (2017) Day and nighttime L - Band amplitude scintillations during low solar activity at a low latitude station in the South Pacific region. Journal of Atmospheric and Solar-Terrestrial Physics, 165-16 . pp. 54-66. ISSN 1364-6826

Singh, Rajesh and Maurya, A.K. and Chanrion, Olivier and Neubert, Torsten and Cummer, Steven A. and Mlynarczyk, Janusz and Cohen, Morris B. and Siingh, Devendraa and Kumar, Sushil (2017) Assessment of Unusual Gigantic Jets observed during the Monsoon season: First observations from Indian Subcontinent. Scientific Reports - Nature, 7 (16436). NA. ISSN 2045-2322

Chand, Atishnal E. and Kumar, Sushil (2017) VLF modal interference distance and nighttime D region VLF reflection height for west - east and east - west propagation paths to Fiji. Radio Science, 52 (8). pp. 1004-1015. ISSN 0048-6604

Kumar, Sushil and NaitAmor, S. and Chanrion, O. and Neubert, T. (2017) Perturbations to the lower ionosphere by tropical cyclone Evan in the South Pacific region. Journal of Geophysical Research: Space Physics, 122 (8). pp. 8720-8732. ISSN 2156-2202

Prasad, Ramendra and Kumar, Sushil and Jayachandran, P. T. (2016) Receiver DCB estimation and GPS vTEC study at a low latitude station in the South Pacific. Journal of Atmospheric and Solar-Terrestrial Physics, 149 . pp. 120-130. ISSN 1364-6826

Kumar, Sushil and Kumar , Abhikesh and Maurya, A.K. and Singh, R. (2016) Changes in the D region associated with three recent solar eclipses in the South Pacific region. Journal of Geophysical Research (Space Physics), 121 . pp. 1-14. ISSN 2156-2202

Kishore, Amol N. and Deo, Anil and Kumar, Sushil (2016) Upper Atmospheric Remote Sensing Using ELF – VLF Lightning Generated Tweek and Whistler Sferics. The South Pacific Journal of Natural and Applied Sciences, 34 (1). pp. 12-20. ISSN 1838-837X

Gokani, Sneha. and Singh, Rajesh and Cohen, Morris B. and Kumar, Sushil and Venkatesham, K. and Maurya, A.K. and Selvakumaran, R. and Lichtenberger, J. (2015) Very low latitude (L=1.08) whistlers and correlation with lightning activity. Journal of Geophysical Research: Space Physics, 120 (8). pp. 6694-6706. ISSN 2156-2202

Selvakumaran, R. and Maurya, A.K. and Gokani, S. and Veenadhari, B. and Venkatesham, K. and Kumar, Sushil and Phanikumar, D.V. and Singh, A.K. and Siingh, D. and Singh, R. (2015) Solar flares induced D-region ionospheric and geomagnetic perturbations. Journal of Atmospheric and Solar - Terrestrial Physics, 123 . pp. 102-112. ISSN 1364-6826

Kumar, Sushil and Kumar, Abhikesh and Menk, Frederick and Maurya, A.K. and Singh, Rajesh and Veenadhari, Bhasakara (2015) Response of the low-latitude D region ionosphere to extreme space weather event of 14–16 December 2006. Journal of Geophysical Research (Space Physics), 120 . pp. 788-789. ISSN 0148-0227

Maurya, A.K. and Phanikumar, D.V. and Singh, R. and Kumar, Sushil and Veenadhari, B. and Kwak, Y.-S. and Kumar, Abhikesh and Singh, A.K. and Kumar, K.N. (2014) Low - mid latitude D region ionospheric perturbations associated with 22 July 2009 total solar eclipse: wave -like signatures inferred from VLF observations. Journal of Geophysical Research: Space Physics, 119 (10). pp. 8512-8523. ISSN 2169-9380

Kumar, Abhikesh and Kumar, Sushil (2014) Space weather effects on the low latitude D - region ionosphere during solar minimum. Earth, Planets and Space, 66 (76). pp. 1-10. ISSN 1343-8832

Srivastava, P.R. and Gokani, S.A. and Maurya, A.K. and Singh, R. and Kumar, Sushil and Veenadhari, B. and Selvakumaran, R. and Singh, A.K. and Siingh, D. and Lichtenberger, J. (2013) One - to - one relationship between low latitude whistlers and conjugate source lightning discharges and their propagation characteristics. Advances in Space Research, 52 (11). pp. 1966-1973. ISSN 0273-1177

Salut, M.M. and Cohen, M.B. and Ali, M.A.M. and Graf, K.L. and Cotts, B.R.T. and Kumar, Sushil (2013) On the relationship between lightning peak current and early VLF perturbations. Journal of Geophysical Research: Space Physics, 118 (11). pp. 7272-7282. ISSN 0148-0227

Kumar, Abhikesh and Kumar, Sushil and Hayakawa, M. and Menk, F. (2013) Subionospheric VLF perturbations observed at low latitude associated with earthquake from Indonesia region. Journal of Atmospheric and Solar-Terrestrial Physics, 102 . pp. 71-80. ISSN 1364-6826

Kumar, V. and Protat, A. and May, P. and Jakob, C. and Penide, G. and Kumar, Sushil and Davies, L. (2013) On the effects of large-scale environment and surface types on convective cloud characteristics over Darwin, Australia. Monthly Weather Review, 141 (4). pp. 1358-1374. ISSN 0027-0644

Kumar, Sushil and Kumar, Abhikesh (2013) Lightning - associated VLF perturbations observed at low latitude: occurrence and scattering characteristics. Earth Planets Space, 65 (1). pp. 25-37. ISSN 1343-8832

Carter, B.A. and Zhang, K. and Norman, R. and Kumar, V.V. and Kumar, Sushil (2013) On the occurrence of equatorial F-region irregularities during solar minimum using radio occultation measurements. Journal of Geophysical Research: Space Physics, 118 . pp. 1-13. ISSN 0148-0227

Maurya, A.K. and Singh, R. and Veenadhari, B. and Kumar, Sushil and Singh, A.K. (2013) Sub - ionospheric very low frequency perturbations associated with the 12 May 2008 M = 7.9 Wenchuan earthquake. Natural Hazards and Earth System Science, 13 . pp. 2331-2336. ISSN 1561-8633

Ajeet, K.M. and Veenadhari, B. and Singh, R. and Kumar, Sushil and Cohen, M.B. and Selvakumaran, R. and Sneha, G. and Pant, P. and Singh, A.K. and Inan, U.S. (2012) Nighttime D region electron density measurements from ELFVLF tweek radio atmospherics recorded at low latitudes. Journal of Geophysical Research (Space Physics), 117 (A1130). pp. 1-13. ISSN 0148-0227

Singh, R. and Cohen, M.B. and Ajeet, K.M. and Veenadhari, B. and Kumar, Sushil and Pant, P. (2012) Very low latitude (L = 1.08) whistlers. Geophysical Research Letters, 39 (23). pp. 1-5. ISSN 0094-8276

Salut, M.M. and Abdullah, M. and Graf, K.L. and Cohen, M.B. and Kumar, Sushil (2012) Long recovery VLF perturbations associated with lightning discharges. Journal of Geophysical Research (Space Physics), 117 (A08311). pp. 1-6. ISSN 0148-0227

Veenadhari, B. and Selvakumaran, R. and Singh, R. and Maurya, A.K. and Gopalswamy, N. and Kumar, Sushil and Kikuchi, T. (2012) CME - driven shocks and the associated sudden commencements/sudden impulses. Journal of Geophysical Research (Space Physics), 117 (A04210). pp. 1-11. ISSN 0148-0227

Veenadhari, B. and Selvakumaran, R. and Singh, R. and Ajeet, K.M. and Gopalswamy, N. and Kumar, Sushil and Kikuchi, T. (2012) Coronal mass ejection – driven shocks and the associated sudden commencements/sudden impulses. Journal of Geophysical Research, 117 (A04210). pp. 1-11. ISSN 0148–0227

Azid, Sheikh I. and Kumar, Sushil (2012) Monitoring and operation of intelligent home system using password protected SMS service. Journal of Intelligent Systems, 2 (1). pp. 10-13. ISSN 0034-1860

Maurya, A.K. and Singh, R. and Veenadhari, B. and Kumar, Sushil and Cohen, M.B. and Selvakumaran, R. and Pant, P. and Singh, A.K. and Siingh, D. and Inan, U.S. (2012) Morphological features of tweeks and nighttime D-region ionosphere at tweek reflection height from the observations in the low latitude Indian sector. Journal of Geophysical Research (Space Physics), 117 (A05301). pp. 1-12. ISSN 0148-0227

Azid, Sheikh I. and Kumar, Sushil (2011) Analysis and performance of a low cost SMS based home security System. International Journal of Smart Home, 5 (3). pp. 15-24. ISSN 1975-4094

Singh, R. and Veenadhari, B. and Maurya, A.K. and Cohen, M.B. and Kumar, Sushil and Selvakumaran, R. and Pant, P. and Singh, A.K. and Inan, U.S. (2011) D-region ionosphere response to the total solar eclipse of 22 July 2009 deduced from VLF tweek observations in the Indian sector. Journal of Geophysical Research, 116 (A10301). p. 9. ISSN 0148-0227

Kumar, Abhikesh and Kumar, Sushil (2010) Decay form of the echo amplitude and echo phase of typical early/fast VLF event on 19.8 kHz signal. The South Pacific Journal of Natural and Applied Sciences, 28 (1). pp. 74-77. ISSN 1838-837X

Kumar, Sushil and Deo, Anil and Ramachandran, Visagaperuman (2009) Nighttime D-region equivalent electron density determined from tweek sferics observed in the South Pacific region. Earth Planets Space, 61 (7). pp. 905-911. ISSN 1880-5981

Kumar, Sushil (2009) Waveguide parameters of 19.8 kHz signal propagating over a long path. Research Letters in Physics, 9 . pp. 1-4. ISSN 1687-689X

Dowden, R.L. and Holzworth, R.H. and Rodger, C.J. and Lichtenberger, J. and Thomson, N.R. and Jacobson, A.R. and Lay, E. and Brundell, J.B. and Lyons, T.J. and O'Keefe, S. and Kawasaki, Z. and Price, C. and Prior, V. and Ortega, P. and Weinman, J. and Mikhailov, Y. and Woodman, R. and Qie, X. and Burns, G. and Collier, A. and Pinto Junior, O. and Diaz, R. and Adamo, C. and Williams, E.R. and Kumar, Sushil and Raga, G.B. and Rosado, J.M. and Avila, E.E. and Cliverd, M.A. and Ulich, T. and Gorham, P. and Shanahan, T.J.G. and Osipowicz, T. and Cook, G. and Zhao, Y. (2008) World-wide lightning location using VLF propagation in the earth-ionosphere waveguide. IEEE Antennas and Wave Propagation, 50 (5). pp. 40-60. ISSN 1045-9243

Kumar, Sushil and Kishore, Amol N. and Ramachandran, Visagaperuman (2008) Higher harmonic tweek sferics observed at low latitude: estimation of VLF reflection heights and tweeks propagation distance. Annales Geophysicae, 26 . pp. 1451-1459. ISSN 0992-7689

Kumar, Abhikesh and Kumar, Sushil (2008) Initial results on solar flare effect on 24.8 kHz subionospheric propagation over long path to Suva. The South Pacific Journal of Natural Sciences, 26 . pp. 82-84. ISSN 1013-9877

Kumar, Sushil and Kumar, Abhikesh and Rodger, C.J. (2008) Subionospheric early VLF perturbations observed at Suva: VLF detection of red sprites in the day. Journal of Geophysical Research, 113 (A03311). pp. 1-13. ISSN 2156–2202

Ramachandran, Visagaperuman and Prakash, Justine N. and Deo, Anil and Kumar, Sushil (2007) Lightning stroke distance estimation from single station observation and validation with WWLLN data. Annales Geophysicae, 25 (7). pp. 1509-1517. ISSN 0992-7689

Kumar, Sushil and Kumar, Abhikesh (2007) Diurnal variation of 19.8 kHz signal propagation over long path to Suva. The South Pacific Journal of Natural Sciences, 25 (1). pp. 67-69. ISSN 1013-9877

Kumar, Sushil and Singh, Sunil K. and Gwal, A.K. (2007) Effect of up-flowing field aligned electron beams on the electron cyclotron waves in the aural magnetosphere. PRAMANA: Journal of Physics, 68 (4). pp. 611-615. ISSN 0304-4289

Kumar, Sushil and Singh, S.K. and Gwal, A.K. (2007) Effect of upflowing field-aligned electron beams on the electron cyclotron waves in the auroral region. Pramana: Journal of Physics, 68 (4). pp. 611-622. ISSN 0304-4289

Kumar, Sushil and Kishore, Amol N. and Ramachandran, Visagaperuman (2007) Ionospheric scintillations on 3.95 GHz signal from intelsat (701) at low latitude in the South Pacific region. Physica Scripta, 75 (3). pp. 258-262. ISSN 0031-8949

Ramachandran, Visagaperuman and Kumar, Vickal V. and Prakash, Justine N. and Kumar, Sushil (2007) Preliminary findings of surface fair-weather electric field trends over small tropical Island station, Suva, Fiji. The South Pacific Journal of Natural Sciences, 12 . pp. 70-72. ISSN 1013-9877

Vijayakumar, P.N. and Tyagi, T.R. and Singh, L. and Chandra, H. and Vyas, G.D. and Rao, D.R.K. and Pathan, B.M. and Iype, A. and Ramsekaran, B. and Naidu, A. and Sadique, S.M. and Iyer, K.N. and Pathak, K.N. and Gwal, A.K. and Kumar, Sushil and Singh, R.P. and Singh, U.P. and Singh, B. and Kumar, P. and Navneeth, G.N. and Koparkar, P.V.S. and Ramarao, P.V.S. and Jaychandran, P.T. and Sriram, P. and Sethuraman, R. and Dasgupta, A. and Basu, K. and Rastogi, R.G. (2007) Some features of plasma bubble induced scintillations during the AICPITS campaigns of 1991. Indian Journal of Radio and Space Physics, 36 (2). pp. 91-102. ISSN 0367-8393

Kumar, Sushil and Deo, Anil and Kishore, Amol N. and Ramachandran, Visagaperuman (2007) Whistlers observed at low-latitude ground-based VLF facility in Fiji. Journal of Atmospheric and Solar-Terrestrial Physics, 69 (2). pp. 1366-1376. ISSN 1364-6826

Kumar, Sushil and Sharma, S. and Chandra, H. (2006) Interplanetary origin of magnetic storms and their F2-region responses at the equatorial anomaly. Advances in Space Research: Space Life Sciences: Flight Measurements, Calibration of Detectors and Environmental Models for Radiation Analysis, 37 (9). pp. 1777-1783. ISSN 0273-1177

Ramachandran, Visagaperuman and Kishore, Amol N. and Kumar, Sushil (2006) Mapping the cloud-to ground lightning occurrence in Fiji. The South Pacific Journal of Natural Sciences, 24 (1). pp. 32-37. ISSN 1013-9877

Kumar, Sushil (2005) F2-region response of geomagnetic storms at equatorial anomaly during 1989-2001. Physica Scripta, 72 (1). pp. 100-104. ISSN 0031-8949

Kumar, Sushil and Chandra, H. and Sharma, S. (2005) Geomagnetic storms and ionospheric effects observed at equatorial anomaly crest in Indian region. Journal of Atmospheric and Solar Terrestrial Physics, 67 (6). pp. 581-594. ISSN 1364-6826

Ramachandran, Visagaperuman and Kumar, Sushil and Kishore, Amol N. (2005) Remote sensing of cloud to ground lightning location using the TOGA of sferics. Atmospheric Science Letters, 6 . pp. 128-132. ISSN 1530-261X

Kumar, Sushil and Ramachandran, Visagaperuman and Kishore, Amol N. (2004) Geomagnetic storms and associated scintillation on VHF signals. The South Pacific Journal of Natural Sciences, 22 . pp. 75-77. ISSN 1013-9877

Ramachandran, Visagaperuman and Kumar, Sushil and Kishore, Amol N. (2003) Cloud-to-ground lightning location using TOGA of sferics. The South Pacific Journal of Natural Sciences, 21 . pp. 63-65. ISSN 1013-9877

Singh, S.K. and Kumar, Sushil and Gwal, A.K. (2003) Daytime very low frequency (VLF) emissions observed at Maitri station, Antarctica. Indian Journal of Physics, 77B (4). pp. 451-455. ISSN 0973-1458

Singh, S.K. and Kumar, Sushil and Gwal, A.K. (2003) Initial results of VLF emissions observations on the ground station at Maitri, Antarctica. Indian Journal of Radio and Space Physics, 32 . pp. 75-82. ISSN 0367-8393

Singh, S.K. and Kumar, Sushil and Gwal, A.K. and Lal, M. and Kumar, Rajou (2003) Whistlers observed at low latitude stations Bhopal and Jammu. Indian Journal of Physics, 77B (6). pp. 625-629. ISSN 0973-1458