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Dr. K. Venkatesh

Assistant professor
Space and Atmospheric Sciences Division
Physical Research Laboratory
Navrangpura, Ahmedabad 380009, India.

Contact

Office Phone : +91-79-26314653
Fax : +91-79-26314659
Email ID : [email protected]
    [email protected]
URL : https://www.prl.res.in/~venkateshk

Research Interests

  • Investigations on equatorial and low latitude ionospheric phenomena.
  • Investigations on topside ionospheric structure and dynamics.
  • Space weather impacts on Earth's upper atmosphere.
  • Ionospheric modelling and data assimilation studies.
  • Ionospheric effects on satellite based technologies.

Academic Qualifications

  • 2013 - Ph.D (Physics), Andhra University, Visakhapatnam, India
  • 2008 - M.Sc (Physics), Andhra University, Visakhapatnam, India
  • 2006 - B.Sc, Acharya Nagarjuna University, India

Employment

  • June 2021 - Present: Assistant Professsor, Physical Research Laboratory, Ahmedabad, India.
  • July 2018 - June 2021: Post-Doctoral fellow at National Atmospheric Research Laboratory, India.
  • November 2013 - October 2017: Post-Doctoral fellow at Universiade do Vale do Paraiba, Brazil.
  • February 2011 - July 2013: DST-INSPIRE Fellow at Andhra University, Visakhapatnam, India.
  • September 2008 - January 2011: Research Scholar at Andhra University, Visakhapatnam, India.

Awards / Recognitions

  • Chair, WG-IIE, International Association of Geomagnetism & Aeronomy (IAGA).
  • Co-chair, WG-IIE, International Association of Geomagnetism & Aeronomy-IAGA, (2019-2023)
  • Listed among Top 10 most valued reviewers of the journal, Advances in Space Research-ASR (2022).
  • Excellent Reviewer of the journal, Earth Planets and Space-EPS (2022).
  • Young Scientist Award from the International Union of Radio Science-URSI, (2015).
  • Guest Editor for special issues in Advances in Space Research, Elsevier, (2016, 2017, 2019, 2024).
  • INSPIRE Fellowship (JRF & SRF) from DST, Govt. of India, New Delhi (2011-2013).
  • Two Gold Medals and Six Awards of the Andhra University for securing University First Rank in M.Sc Physics (2008).
  • Best Paper Prize in the International Beacon Satellite Symposium (IBSS-2013) held at the University of Bath, Bath, UK (2013).
  • Best Participant Prize in the SERC School on “GPS and Local Area Augmentation System” held at NERTU, Osmania University, Hyderabad (2009).
  • Best Paper Prize in the “National Seminar on Role of Radars in Atmospheric and Ionospheric studies (RAISE-2012)” held at K.L. University, Vijayawada (2012).
  • 4th rank in the Andhra University Common Entrance Test (AUCET) for admission into M.Sc Physics course (2006).

Scientific Publications in Peer-Reviewed Journals

  1. K. Venkatesh, Pallamraju, D., Dalsania P Kelvy, Chakrabarty, D. and Pant, T.K., Evaluation of the performance of F-layer peak height models used in IRI-2016 over the Indian equatorial and low latitudes, Adv. Space Res., 73 (7), 3797-3807, doi: 10.1016/j.asr.2023.06.047, 2024.
  2. K. Venkatesh, Pezzopane, M., Preface: Recent advances in equatorial, low- and mid-latitude mesosphere, thermosphere and ionosphere studies, Adv. Space Res., 73 (7), 3365-3366, doi: 10.1016/j.asr.2024.01.047, 2024.
  3. Lissa, D., Gopi K, Seemala, K. Venkatesh, Prasad, D.S.V.V.D. and Niranjan, K., ROTI and scintillation index correlation under quiet and disturbed periods over an Indian low latitude station, Waltiar, Adv. Space Res., 73 (7), 3494-3503, doi: 10.1016/j.asr.2023.09.060, 2024.
  4. Ansari, K., Panda, S.K.,K. Venkatesh, and Jamjareegulgarn, P., Towards mitigating the effect of plasma bubbles on GPS positioning accuracy through wavelet transformation over Southeast Asian region, Adv. Space Res., 73 (7), 3642-3657, doi: 10.1016/j.asr.2023.04.041, 2024.
  5. K. Venkatesh, Pallamraju, D., Pant, T.K. and Suryawanshi, P. Parametric dependence of topside ionospheric empirical scale height and electron density profiles in neQuick2 model over the equatorial and low lattiudes and its consequences on the estimation of TEC, J. Geophys. Res., Space Physics, 128 (9), e2023JA031335, doi: 10.1029/2023JA031335, 2023.
  6. de Abreu, A.J., Correia, E., de Jesus, R., K. Venkatesh, Macho, E.P., Roberto, M., Fagundes, P.R. and Gende, M., Statistical analysis on the ionospheric response over South American mid-and near high-latitudes during 70 intense geomagnetic storms occurred in the period of two decades, J. Atmos. Sol. Terr. Phys., 245, 106060, pp.13, doi:10.1016/j.jastp.2023.106060, 2023.
  7. Fagundes, P.R., Tasil Brown, V.Y., Pillat, V.G., arcanjo, M.O., K. Venkatesh, Habarulema, J.B., Bolzan, M.J.A, de Jesus, R., de Abreu, A.J., Tardelli, A., Vieira, F. and Denardini, C.M., Ionospheric storm due to solar Coronal mass ejection in September 2017 over the Brazilian and African longitudes, Adv. Space Res., 71 (1), 46-66, doi: 10.1016/j.asr.2022.07.040, 2023.
  8. K. Venkatesh, and A.K. Patra, Formation of the evening time F3 layer investigated using Jicamarca incoherent scatter radar observations, J. Geophys. Res. Space Physics, 127 (2), e2021JA029684, 1-8, doi: 10.1029/2021JA029684, 2022.
  9. Lissa, D., K. Venkatesh, Prasad, D.S.V.V.D. and Niranjan K., Distinct ionospheric response to three different geomagnetic storms during 2016 using GPS-TEC observations over the Indian equatorial and low latitudes, Adv. Space Res., 70(4), 1089-1103, doi: 10.1016/j.asr.2022.05.027, 2022.
  10. Vieira, F., Fagundes, P.R., Pillat V.G., Agyei-Yeboah, E., K. Venkatesh, Arcanjo, M.O., Ionospheric disturbances over the American and African sectors due to the 2019 major Sudden Stratospheric Warming (SSW 2019) under low solar activity conditions, J. Atmos. Sol. Terr. Phys., 240, 105945, 1-16, doi: 10.1016/j.jastp.2022.105945, 2022.
  11. Santos, A.M., Brum, C.G.M., Batista, I.S., Sobral, J.H.A, Abdu, M.A., Souza, J.R., Chen, S.S., Denardini, C.M., de Jesus, R., K. Venkatesh, Nogueira, P.A.B., Anommalous responses of the F2 layer over the Brazilian equatorial sector during a counter electrojet event: A case study, J. Geophys. Res., Space Physics, e2022JA030584, 27(9), 1-12, e2022JA030584, doi: 10.1029/2022JA030584, 2022.
  12. de Abreu, A.J., Correia, E., Denardini, C.M., de Jesus, R., K. Venkatesh, Roberto, M., Abalde, J.R., Fagundes, P.R., Bolan, M.J.A. and Gende, M., Ionospheric GPS-TEC responses from equatorial region to the EIA crest in the South American sector under intense space weather conditions, J. Atmos. Sol. Terr. Phys., 227, 105801, doi: 10.1016/j.jastp.2021.105801, 2022.
  13. Lissa, D., K. Venkatesh, Prasad, D.S.V.V.D., Niranjan, K., Seemala Gopi K., GPS TEC variations under quiet and disturbed geomagnetic conditions during the descendinf phase of the 24th solar cycle over the Indian equatorial and low latitude regions, Adv. Space Res., 68 (4), 1836-1849, doi: 10.1016/j.asr.2021.04.021, 2021
  14. Ebenezer, A.Y., Fagundes, P.R., Tardelli, A., Pillat, V.G., Alessio, P., K. Venkatesh, Pezzopane, M., Viera, F., Ground and satellite based observations of ionospheric plasma bubbles and blobs at 5.65o latitude in the Brazilian sector, Adv. Space Res., 67 (8), 2416-2438, doi: 10.1016/j.asr.2021.01.034, 2021.
  15. K. Venkatesh, A.K. Patra and B.W. Reinisch, F3 layer characteristics revealed by the Jicamarca incoherent scatter radar: First Results, J. Geophys. Res. Space Physics, 125 (8), e2020JA028082, doi: 10.1029/2020JA028082, 2020.
  16. Dias, M.A.L, Fagundes, P.R, K. Venkatesh, Pillat, V.G, Ribeiro B.A.G., Seemala, G.K, Arcanjo, M.O., Daily and monthly variations of the Equatorial Ionization Anomaly (EIA) over the Brazilian sector during the descending phase of the solar cycle 24, J. Geophys. Res. Space Physics, 125(9), e2020JA027906, doi: 10.1029/2020JA027906, 2020.
  17. Fagundes, P.R., M. Pezzopane, J.B. Habarulema, K. Venkatesh, M.A.L. Dias, A. Tardelli, A.J.de Abreu, V.G. Pillat, A. Pignalberi, M.J.A. Bolzan, B.A.G. Ribeiro, F. Vieira, J.P. Raulin, C.M. Denardini, M.O. Arcanjo, G.K. Seemala, Ionospheric disturbances in a large area of the terrestrial globe by two strong solar flares of September 6, 2017, the strongest space weather events in the last decade, Adv. Space Research, 66(7), 1775-1791, doi: 10.1016/j.asr.2020.06.032, 2020.
  18. de Jesus, R., Batista, I.S., Takahashi, H., de Paula, E.R., Barros, D., Figueiredo, C.A.O.B., de Abreu, de., Jonah, O.F., Fagundes, P.R., K. Venkatesh, Morphological features of ionospheric scintillations during high solar activity using GPS observations over the South American sector., J. Geophys. Res. Space Physics, 125(3), doi: 10.1029/2019JA027441, 2020.
  19. K. Venkatesh, A.K. Patra, N. Balan, P.R. Fagundes, S. Tulasi Ram, I.S. Batista and B. Reinisch, Super-fountain effect linked with 17 March 2015 geomagnetic storm manifesting distinct F3 layer, J. Geophys. Res. Space Physics, 124, 6127-6137, doi:10.1029/2019JA026721, 2019.
  20. Pezzopane, M., K. Venkatesh, Preface: Variability and coupling of the equatorial, low- and mid-latitude mesosphere, thermosphere and ionosphere: Latest developments of monitoring and modeling techniques, Adv. Space Research, 64 (10), 1839-1840, doi: 10.1016/j.asr.2019.09.004, 2019.
  21. S. Tulasi Ram, N. Bhosale, N. Balan, Q. Zhang, K. Shiokawa, Z. Xing, K. Venkatesh, A. Yoshikawa and A. Coster, Three different episodes of prompt equatorial electric field perturbations under steady southward IMF Bz during St. Patrick’s day storm, J. Geophys. Res, Space Physics, 124 (12), 10428-10443, doi: 10.1029/2019JA027069, 2019.
  22. Ribeiro, B.A.G., P.R.Fagundes, K. Venkatesh, A. Tardelli, V.G.Pillat, G.K. Seemala, Equatorial and low-latitude positive ionospheric phases due to moderate geomagnetic storm during high solar activity in January 2013, Adv. Space Research, 64 (4), 995-1010, doi: 10.1016/j.asr.2019.05.032, 2019.
  23. de Abreu, A.J, M.Roberto, M.A.Alves, J.R.Abalde, P.A.B.Nogueira, K. Venkatesh, P.R.Fagundes, R.de Jesus, M.Gende, I.M.Martin, Effects of X2-class solar flare events on ionospheric GPS-TEC and Radio Waves over Brazilian sector, Adv. Space Research., 63, 3586-3605, doi: 10.1016/j.asr.2019.02.020, 2019
  24. Srinivasu, V.K.D., D.S.V.V.D. Prasad, K. Niranjna, G.K. Seemala, K. Venkatesh, L-band scintillation and TEC variations on St Patrick’s Day storm of 17 March 2015 over Indian longitudes using GPS and GLONASS observations, Journal of Earth Syst. Sci., 128:69, doi: 10.1007/s12040-019-1097-6, 2019.
  25. Perna, L., K. Venkatesh, V.G. Pillat, M. Pezzopane and P.R. Fagundes, Bottom side profiles for two close stations at the southern crest of the EIA: Differences and comparison with IRI-2012 and NeQuick2 for low and high solar activity, Adv. Space Research., 61, 295-315, doi: 10.1016/j.asr.2017.10.007, 2018.
  26. Panda, S.K., H. Haralambous, K. Venkatesh, Global Longitudinal Behavior of IRI Bottomside Profile Parameters from FORMOSAT-3/COSMIC Ionospheric Occultations, J. Geophys. Res. Space Physics, 123, 7011–7028, doi: 10.1029/2018JA025246, 2018.
  27. Barbosa, F.R.E., P.R. Fagundes, K. Venkatesh, B.G.Fejer, V.G.Pillat, C.M.Denardini, M.T.A.H.Muella, Multi-scale ionospheric irregularities occurrence over South America during the St. Patrick’s day storm on March 17, 2015, J. Atmos. Sol. Terr. Phys., 174, 32-45, doi: 10.1016/j.jastp.2018.05.001, 2018.
  28. Tardelli, A., Pezzopane, M., Fagundes, P.R., K. Venkatesh, Pillat, V.G., Cabrera, M.A., and Ezquer R.G. (2018), Study of the F3 and StF4 layers at Tucumán near the southern crest of the EIA in western South America. J. Geophys. Res. Space Physics, 123, 3, 2156-2167, doi: 10.1002/2017JA024539, 2018.
  29. K. Venkatesh, S. Tulasi Ram, P.R. Fagundes, Gopi K. Seemala and I.S. Batista, Electrodynamic disturbances in the Brazilian equatorial and low-latitude ionosphere on St. Patrick’s Day storm of 17 March 2015, J. Geophys. Res. Space Physics, 122, 4553-4570, doi: 10.1002/2017JA024009, 2017.
  30. de Jesus, R., I.S. Batista, O.F. Jonah, A.J. de Abreu, P.R. Fagundes, K. Venkatesh, C.M. Denardini, An investigation of the ionospheric disturbances due to the 2014 sudden stratospheric warming events over Brazilian sector, J. Geophys. Res. Space Physics, 122, 11,698–11,715, doi: 10.1002/2017JA024560, 2017.
  31. Tardelli Coelho, F., A.A. Pimenta, A. Tardelli, J.R. Abalde, K. Venkatesh, Plasma blobs associated with plasma bubbles observed in the Brazilian sector, Adv. Space Research, 60, 8, 1716-1724, doi: 10.1016/j.asr.2017.06.018, 2017.
  32. K. Venkatesh, M. Pezzopane, Studies on mesosphere, thermosphere and ionosphere from equatorial to mid latitudes – Recent investigations and improvements – Part 1, Adv. Space Research, 60, 8, 1583-1584, doi: 10.1016/j.asr.2017.08.010, 2017.
  33. de Abreu, A.J., M. Martin, R. de Jesus, M.J.A. Bolzan, K. Venkatesh, P.R. Fagundes, M.A. Alves, M. Gende and S. Kumar, Comparison of GPS-TEC measurements with IRI2012-TEC predictions in the Brazilian sector during the unusual solar minimum 2009, Annals of Geophysics, 60, 3, A0331, doi: 10.4401/ag-7300, 2017.
  34. de Jesus, R., I. S. Batista, A.J. de Abreu, P.R. Fagundes, K. Venkatesh, C.M.Denardini, Observed effects in the equatorial and low-latitude ionosphere in the South American and African sectors during the 2012 minor sudden stratospheric warming, J. Atmos. Sol. Terr. Phys., 157-158, 78-89, doi: 10.1016/j.jastp.2017.04.003, 2017.
  35. de Abreu, A.J., I.M. Martin, P.R. Fagundes, K. Venkatesh, I.S. Batista, R. de Jesus, M. Rockenback, A. Coster, M. Gende, M.A. Alves, M. Wild, Ionospheric F-region observations over American sector during an intense space weather event using multi-instruments, J. Atmos. Sol. Terr. Phys., 156, 1-14, doi: 10.1016/j.jastp.2017.02.009, 2017.
  36. Vieira F., P.R. Fagundes, K. Venkatesh, L. Gocharenko and Pillat, V.G., Total Electron Content disturbances during minor Sudden Stratospheric Warming, over Brazilian region: A Case study during January 2012, J. Geophys. Res. Space Physics, 122, 2119-2135, doi: 10.1002/2016JA023650, 2017.
  37. de Jesus, R., I. S. Batista, P.R. Fagundes, K. Venkatesh, and A. J. de Abreu, Ionospheric response to the 2006 sudden stratospheric warming event over the equatorial and low latitudes in the Brazilian sector using GPS observations, J. Atmos. Sol. Terr. Phys., 154, 92-103, doi: 10.1016/j.jastp.2016.12.005, 2017.
  38. Tardelli, A., P. R. Fagundes, M. Pezzopane, K. Venkatesh, and V. G. Pillat, Seasonal and solar activity variations of F3 layer and quadruple stratification (StF-4) near the equatorial region, J. Geophys. Res. Space Physics, 121, 12.116-12,125, doi:10.1002/2016JA023580, 2016.
  39. K. Venkatesh, P.R. Fagundes, A. J. de Abreu and V.G. Pillat, Unusual noon-time bite-outs in the ionospheric electron density around the anomaly crest locations over the Indian and Brazilian sectors during quiet conditions-a case study, J. Atmos. Sol. Terr. Phys., 147, 126-137, doi: 10.1016/j.jastp.2016.07.016, 2016.
  40. Fagundes, P.R., Cardoso, F.A., Fejer, B.G, K. Venkatesh, Ribeiro, B.A.G., Pillat, V.G., Positive and negative ionospheric storm effects during the extreme space weather event of March 2015 over the Brazilian sector, J. Geophys. Res. Space Physics, 121 (6), 5613-5625, doi: 10.1002/2015JA022214, 2016.
  41. K. Venkatesh, P.R. Fagundes, Bottom-side profile parameters (B0, B1) characteristics over the Brazilian equatorial and low latitudes and their comparison with different options in the IRI-2012 model during the 24th solar minimum (2010-2011), J. Atmos. Sol. Terr. Phys., 146, 16-27, doi: 10.1016/j.jastp.2016.05.004, 2016.
  42. de Jesus, R., P. R. Fagundes, A. Coster, O. S. Bolaji, J. H. A. Sobral, I. S. Batista, A. J. de Abreu, K. Venkatesh, M. Gende, J. R. Abalde, S. G. Sumod, Effects of the intense geomagnetic storm of September-October 2012 on the equatorial, low- and mid-latitude F region in the American and African sector during the unusual 24th solar cycle, J. Atmos. Sol. Terr. Phys., 138-139, 93-105, doi:10.1016/j.jastp.2015.12.015, 2016.
  43. K. Venkatesh, P.R. Fagundes, D.S.V.V.D. Prasad, C.M. Denardini, A. J de Abreu, R. de Jesus and M. Gende, Day-to-day variability of Equatorial Electrojet and its role on the day-to-day characteristics of the Equatorial Ionization Anomaly over the Indian and Brazilian sectors, J. Geophys. Res. Space Physics, 120 (10), 9117-9131, doi: 10.1002/2015JA021307, 2015. Featured in JGR Oct., 2015 Cover Page (Vol.120(10), doi: 10.1002/jgra.51257).
  44. Fagundes, P.R., Goncharenko.L.P, de Abreu.A.J, K. Venkatesh, Gende.M, de Jesus.R, Pezzopane.M, Coster.AJ and Pillat.VG, Ionospheric response to the 2009 sudden stratospheric warming over the equatorial, low- and mid-latitudes in the South American sector, J. Geophys. Res. Space Phys., 120 (9), 7889-7902, doi: 10.1002/2014JA020649, 2015.
  45. K. Venkatesh, P.V.S.Rama Rao, S.Gopi Krishna and D.S.V.V.D.Prasad, Latitudinal variation in the occurrence of GPS L-band scintillations associated with the day-to-day changes in TEC, h’F and the ExB drift velocity and their impact on GPS satellite signals, J. Earth. Sys. Sci., 124 (3), 497-513, doi: 10.1007/s12040-015-0558-9, 2015.
  46. K. Venkatesh, P.V.S.Rama Rao and Paulo R Fagundes, The role altitudinal variation of scale height in determining the topside electron density profile over equatorial and low latitude sectors, J. Atmos. Sol. Terr. Phys., 121 (A), 72-82, doi: 10.1016/j.jastp.2014.10.006, 2014.
  47. K. Venkatesh, P.R.Fagundes, R. de Jesus, A.J.de Abreu, V.G.Pillat and S.G.Sumod, Assessment of IRI-2012 profile parameters by comparison with the ones inferred using NeQuick2, Ionosonde and FORMOSAT-1 data during the high solar activity over Brazilian equatorial and low latitude sector, J. Atmos. Sol. Terr. Phys., 121 (A), 10-23, doi: 10.1016/j.jastp.2014.09.014, 2014.
  48. K. Venkatesh, P.R.Fagundes, Gopi K. Seemala, R. de Jesus, A.J. de Abreu and V.G.Pillat, On the performance of the IRI-2012 and NeQuick2 models during the increasing phase of the unusual 24th solar cycle in the Brazilian equatorial and low-latitude sectors, J. Geophys. Res. Space Physics, 119 (6), 5087-5105, doi: 10.1002/2014JA019960, 2014.
  49. Rama Rao, P.V.S., K. Venkatesh, D.S.V.V.D.Prasad and K. Niranjan, On the uncertainties in the measurement of absolute (true) TEC over Indian equatorial and low latitude sectors, Adv. Space Research, 51 (7), 1238-1252, doi: 10.1016/j.asr.2012.10.032, 2013.
  50. Prasad, S.N.V.S., P.V.S.Rama Rao, D.S.V.V.D.Prasad, K. Venkatesh, and K. Niranjan, Morphological studies on ionospheric VHF scintillations over an Indian low latitude station during a solar cycle period (2001-2010), Adv. Space Research, 50 (1), 56-69, doi: 10.1016/j.asr.2012.03.020, 2012.
  51. Prasad, S.N.V.S., D.S.V.V.D.Prasad, K. Venkatesh, K.Niranjan and P.V.S.Rama Rao, Diurnal and Seasonal variations in sporadic E layer (Es layer) occurrences over equatorial, low and mid-latitude stations-a comparative study, Indian J. Rad. & Space Phys.41 (1), 26-28, ISSN:0975-105X,2012.
  52. Prasad, S.N.V.S., P.V.S.Rama Rao, D.S.V.V.D.Prasad, K. Venkatesh, and K. Niranjan, On the variabilities of the Total Electron Content (TEC) over the Indian low latitude sector, Adv. Space Research, 49 (5), 898-913, doi: 10.1016/j.asr.2011.12.020, 2012.
  53. Saranya,P.L., K. Venkatesh, D.S.V.V.D.Prasad, P.V.S.Rama Rao and K.Niranjan, Prestorm behaviour of TEC (GPS) and NmF2 over equatorial and low latitude stations in the Indian sector, Adv. Space Research, 48 (2), 207-217, doi:10.1016/j.asr.2011.03.028, 2011.
  54. K. Venkatesh, P.V.S.Rama Rao, P.L. Saranya, D.S.V.V.D. Prasad and K. Niranjan, Vertical electron density and topside effective scale height (HT) variations over the Indian equatorial and low latitude stations, Ann. Geophys., 29 (10), 1861-1872, doi:10.5194/angeo-29-1861-2011, 2011.
  55. K. Venkatesh, P.V.S. Rama Rao, D.S.V.V.D. Prasad, K.Niranjan and P.L.Saranya, Study of TEC, slab-thickness and neutral temperature of the thermosphere in the Indian low latitude sector, Ann. Geophys., 29 (9), 1635-1645, doi: 10.5194/angeo-29-1635-2011, 2011.