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Prof. D. Pallamraju, FASc

Academician, International Academy of Astronautics, IAA
Senior Professor & Dean
Physical Research Laboratory
Navrangpura, Ahmedabad 380009, India.

Contact

Office Phone : +91-79-26314658/ 4863/ 4861
Fax : +91-79-26314659
Email ID : [email protected]; [email protected]
URL : https://www.prl.res.in/~raju

Research Interests

  • Space Weather effects in the Earth's upper atmosphere.
  • Investigations of the equatorial-, middle- and high-latitude upper atmospheric phenomena.
  • Investigation of coupling among various altitude regions of the earth's atmosphere.
  • Investigation of neutral and plasma dynamics during quiet and disturbed geomagnetic conditions.
  • Exploring new methods of investigations for Upper atmospheric research.
Investigations of upper atmospheric phenomena and their associated effects on the neutral and plasma dynamics are carried out using all-sky daytime optical measurements from various regions on the ground. By simultaneous measurements over a large field-of-view on emissions that originate from multiple altitudes, investigations are carried out on vertical coupling of upper atmospheric regions. Space weather effects at various latitudes is pursued using various ground and satellite based instrumentation.

Employment

  • Mar 2020 - present: Dean, Physical Research Laboratory, Ahmedabad, India.
  • July 2019 - present: Senior Professor at the Physical Research Laboratory, Ahmedabad, India.
  • Jan 2019 - December 2022: Chairman (2nd Term), Space and Atmospheric Sciences Division at the Physical Research Laboratory, Ahmedabad, India.
  • July 2013 - June 2019: Professor at the Physical Research Laboratory, Ahmedabad, India.
  • April 2012 - March 2015: Chairman (1st Term), Space and Atmospheric Sciences Division at the Physical Research Laboratory, Ahmedabad, India.
  • November 2007 - June 2013: Associate Professor at the Physical Research Laboratory, Ahmedabad, India.
  • January 2004 - 2008: Scientific Coordinator for CAWSES, an International program of SCOSTEP (Scientific Committee on Solar-Terrestrial Physics). CAWSES office has been established at the Center for Space Physics in Boston University, USA.
  • January 2002 - October 2007: Senior Research Associate at the Center for Space Physics, Boston University, USA.
  • June 1997 - December 2001: Research Associate at the Center for Space Physics, Boston University, USA.
  • March 1996 - May 1997: Post-Doctoral Fellow at the Physical Research Laboratory, Ahmedabad, India.
  • August 1990 - February 1996: Research Scholar at the Physical Research Laboratory, Ahmedabad, India.

Association / Academies

  • Academician, International Academy of Astronautics (IAA)
  • Elected Fellow, Indian Academy of Sciences (IASc) Bangalore, India
  • Life Member, American Geophysical Union (AGU)
  • Member, Asia Oceania Geosciences Society (AOGS) (2009 - present)
  • Associate, Committee on Space Research (COSPAR) (2002 - present)

Professional Services / Recognitions

  • Member INSA-ISC National Committee for COSPAR, URSI, SCOSTEP, (2024-2026)
  • Elected as Corresponding Member, International Academy of Astronautics, (IAA), 2023
  • Speaker for the "5th PRL-IAPT Dr. Vikram Sarabhai Lecture", delivered on 22 March 2023 at PRL, Ahmedabad.
  • Speaker for the "44th IITM's Prof. R. Ananthakrishnan Colloquium", delivered on 13 February 2023 at IITM, Pune.
  • Elected Fellow, Indian Academy of Sciences, (IASc) 2023
  • Vice-Chair, Scientific Commission C (2021-2024) of Committee on Space Research COSPAR on Space Studies of the Upper Atmospheres of the Earth and Planets Including Reference Atmosphere.
  • Invited to serve as Co-leader (2020-2024) for the Pillar-2 (Space Weather and Atmosphere) of the SCOSTEP's (Scientific Committee on Solar Terrestrial Physics) new program, PRESTO (Predictability of the variable solar-terrestrial coupling).
  • Guest Editor (2019-2021), Journal of Atmospheric and Solar-Terrestrial Physics (JASTP) Special Issue on VARSITI2019 and STP-14 .
  • Special Issue Organizer (2019-2020), Journal of Geophsyical Research : Space Physics (JGR-SP) Special Issue on 15th International Symposium on Equaotrial Aeronomy .
  • Invited as an Expert for defining the International Scientific Program of the SCOSTEP. Meeting was held at National Space Science Institute, Beijing, during 13 - 16 November 2018.
  • Chair, Scientific Organizing Committee & Convener of the 15th International Symposium on Equatorial Aeronomy (ISEA-15): hosted by PRLduring October 22 - 26, 2018 ISEA-15 .
  • Member, Editorial Board (2018-2021): Earth, Planets, and Space (EPS).
  • Member, Editorial Board (2015-present): Indian Journal of Radio and Space Physics (IJRSP).
  • Guest Editor (2016-2017), Annales Geophysicae (AG) Special Issue on 14th International Symposium on Equaotrial Aeronomy .
  • Co-PI, NAVA payload on proposed ISRO's future mission to Venus.
  • Chair (2015-present), Proposed Aeronomy satellite study team constituted by the Advisory Committee on Space (ADCOS), ISRO. The proposed mission is named as Disturbed and quiet time Ionosphere-thermosphere System at High Altitudes DISHA. Also, PI/Co-PI on three payloads (LP, DM, AP).
  • Member (2014), Science Steering Committee, Solar-Terrestrial Atmospheric Research Program (STARP-India).
  • One of the group leaders (2013-2019) of the ROSMIC (Role of the Sun and the Middle atmosphere/thermosphere/ionosphere In Climate) project of VarSITI (Variability of the Sun and Its Terrestrial Impacts) program.
  • Vice-Chair (2012-2020), of the Sub-Commission C1 on "The Earth's Upper Atmosphere and Ionosphere" of COSPAR (Committee on Space Research) for the period.
  • Science Discipline Representative (SDR) (2011-2020), to the Scientific Committee on Solar-Terrestrial Physics (SCOSTEP) . SDRs are also members of the SCOSTEP General Council.
  • Secretary (2011-2015) of the Solar-Terrestrial (ST) section of the Asia Oceania Geosciences Society (AOGS).
  • Member Secretary (2011-present), Board of Studies, Centre for Space Science and Technology Education in Asia and the Pacific (CSSTEAP) (Affiliated to the United Nations).
  • Member (2009-2015), CAWSES-India Phase II Science Steering Committee.
  • Member (2009-2012), CAWSES-II Task Group 4 on What is the geospace response to variable waves from the lower atmosphere?
  • Managing Guest Editor (2011-2012), Journal of Atmospheric and Solar Terrestrial Physics (JASTP) Special Issue: Atmospheric Coupling Processes in the Sun-Earth System
  • Member (2010-2012), Board of Studies, University of Pune.
  • Peer Reviewer in National Aeronautics and Space Administration (NASA) and National Science Foundation (NSF), USA Review Panels.

Ph.D. Students

  • Fazlul I. Laskar (2009 - 2014): Winner of the GSA-CHARUSAT Best Thesis Award for the year 2014 (presently Senior Research Associate at Laboratory for Atmospheric and Space Physics (LASP), University of Colorado, USA)
  • Deepak K. Karan (2012 - 2017): Winner of the GSA-CHARUSAT Best Thesis Award for the year 2017 & International Association for Geomagnetism and Aeronomy (IAGA) Young Scientist Award for the year 2019 (presently Research Associate at Laboratory for Atmospheric and Space Physics (LASP), University of Colorado, USA)
  • Ravindra P. Singh (2011 - 2017) (presently Scientist-SF at PRL)
  • Subir Mandal (2015 - 2020) (presently Research Scientist at BAS,Cambridge, UK)
  • Sovan Saha (2017 - 2022) (presently PDF at PRL)
  • Sunil Kumar (2018 - 2023) (presently PDF at PRL)
  • Kshitiz Upadhyay (2019 - Present) (presently SRF)
  • Komal (2022 - Present) (presently JRF)

Post Doctoral Fellows

  • Dr. Uma Das, (2008-2010): Presently faculty at IIIT, Kalyani.
  • Dr. Suneel Krishna, (2010-2011): Presently Assistant Professor, Indian Institute of Technology, Roorkee, India.
  • Dr. Sneha Yadav (2013-2015): Presently Designated Assistant Professor, ISEE, Nagoya University, Japan.
  • Dr. Fazlul Laskar (2014-2015): Presently Senior Research Scientist at LASP, Colorado, USA working on GOLD satellite mission.
  • Dr. Deepak K. Karan (2017-2019): Presently Research Scientist at LASP, Colorado, USA working on GOLD satellite mission.
  • Dr. Subir Mandal (2021-2022): Presently Research Scientist at British Antarctic Survey, Cambridge, UK.
  • Dr. Dupinder Singh (2021-2022): A SERB-NPDF at PRL; Presently at the MIT Haystack Observatory, MA, USA.
  • Dr. Narayan Behera (2022-Present)
  • Dr. Sovan Saha (2022-Present)
  • Dr. Sunil Kumar (2023 - Present)

Scientific Publications in Peer-Reviewed Journals


** indicates PhD Student/PDF/Mentee first author

  1. ** Upadhyay, K., and D. Pallamraju, (2024). First Daytime Red-Line Emission Measurements of the Stable Auroral Red (SAR) Arcs, Geophysical Research Letters, 2024. https://doi.org/10.1029/2023GL106292
  2. Venkatesh., K., D. Pallamraju, T. K. Pant, and P. Suryawanshi, (2023). Parametric dependence of topside ionospheric empirical scale height and electron density profiles in NeQuick2 model over the equatorial and low latitudes and its consequences on the estimation of TEC, Journal of Geophysical Research - Space Physics, 2023. https://doi.org/10.1029/2023JA031335
  3. ** Upadhyay, K., D. Pallamraju, and S. Chakrabarti, (2023). Imprint of storm enhanced density in ground-based OI 630.0 nm dayglow measurements, Journal of Geophysical Research - Space Physics, 2023. https://doi.org/10.1029/2023JA031409.
  4. Bhardwaj, Arti, Ankit Gupta, Qadeer Ahmed, Anshul Singh, Sumedha Gupta, Sumanta Sarkhel, M. V. Sunil Krishna, Duggirala Pallamraju, Tarun Pant, and Arun Kumar Upadhayaya, (2023). Signature of Y-forking in Ionogram traces observed at low-mid latitude Indian station, New Delhi during earthquake events of 2020: Ionosonde Observations, Frontiers in Astronomy and Space Sciences, Sec. Space Physics, 10 – 2023. https://doi.org/10.3389/fspas.2023.1170288
  5. Venkatesh, K., D. Pallamraju, D. Chakrabarty, T. K. Pant, K. Dasania, (2023). Evaluation of the performance of F-layer peak height models used in IRI-2016 over the Indian equatorial and low latitudes, Advances in Space Research, 2023. https://doi.org/10.1016/j.asr.2023.06.047
  6. ** Singh, D., G. Mitra, A. Guharay, D. Pallamraju, S. Gurubaran, (2023). Quasi-two-day wave amplification through interhemispheric coupling during the 2010 austral summer, Advances in Space Research, 2023. https://doi.org/10.1016/j.asr.2023.06.044
  7. ** Kumar, S., T. A. Siddiqui, C. Stolle, N. M. Pedatella, and D. Pallamraju, Impact of strong and weak stratospheric polar vortices on geomagnetic semidiurnal solar and lunar tides Earth, Planets, and Space, 75:52, 2023. https://doi.org/10.1186/s40623-023-01810-x.
  8. Singh, R. P., D. Pallamraju . P. Surywanashi, and S. Urmalia, (2023). Studies of atmospheric waves by ground-based observations of OH(3-1) emission and rotational temperature using PRL Airglow InfraRed Spectrograph (PAIRS), Jouranl of Atmospheric and Solar-Terrestrial Physics, 8, (2023). https://doi.org/10.1016/j.jastp.2023.106039
  9. ** Kumar, S., ** S. Mandal, and D. Pallamraju, (2023). Daytime three-dimensional gravity waves and neutral winds derived using combined optical and radio measurements, Journal of Geophysical Research - Space Physics, 2023. https://doi.org/10.1029/2022JA030954
  10. Pallamraju, D., P. Suryawnashi, S. Urmalia, S. Kumar, S. Saha, R. R. Singh, P. K. Kushwaha, and M. Soni (2023), CDAP: A portable CCD-based Daytime Airglow Photometer for Investigations of Ionosphere-Thermosphere Phenomena, J. Atmos. Sol.-Terr. Phys., 106025, 2023. https://doi.org/10.1016/j.jastp.2023.106025
  11. ** Saha, S., and D. Pallamraju, (2022). Latitudinal Variations in the Nocturnal behaviour of OI 630 nm Airglow Emissions and their relationship to the Equatorial Electrodynamics, Journal of Atmospheric and Solar-Terrestrial Physics, 2022. https://doi.org/10.1016/j.jastp.2022.105965
  12. ** Mandal, S., D. Pallamraju, and T. K. Pant (2022). Vertical propagation speeds of gravity waves in the daytime as a precursor to the onset of the Equatorial Spread-F, Journal of Geophysical Research - Space Physics 127, e2022JA030401, https://doi.org/10.1029/2022JA030401
  13. ** Saha, S., D. Pallamraju, and R. Ghodpage, (2022). Investigation of equatorial plasma bubbles as observed in the OI 630 nm nightglow emissions over off-equatorial and low-latitudinal locations over Indian longitudes, Advances in Space Research. https://doi.org/10.1016/j.asr.2022.08.023
  14. ** Kumar, S., D. Pallamraju, P. Suryawanshi, T. Vijayalakshmi, and S. Gopi (2022). Latitudinal Variation in OI 630.0 nm and OI 777.4 nm Dayglow Emissions due to the Equatorial Electrodynamic Processes, Advances in Space Research . https://doi.org/10.1016/j.asr.2021.10.034
  15. ** Saha, S., D. Pallamraju, T. K. Pant, and S. Chakrabarti (2021). On the cause of nocturnal OI 630 nm airglow variability over low-latitude thermosphere, Journal of Geophysical Research - Space Physics , https://doi.org/10.1029/2021JA029146 .
  16. Ward, W., A. Sepp䬤, E. Yigit, T. Nakamura, C. Stolle, J. Lastovicka, T. Woods, Y. Tomikawa, F-J Lübken, S. Solomon, D. Marsh, B. Funke, D. Pallamraju . Role Of the Sun and the Middle atmosphere/thermosphere/ionosphere In Climate (ROSMIC): A Retrospective and Prospective View, Progress in Earth and Planetary Science , 8, (2021). https://doi.org/10.1186/s40645-021-00433-8
  17. Shiokawa, K., S. Dasso, R. Miteva, D. Pallamraju, S. Zhang (2021) Preface of the special issue: “Variability of the Sun and Its Terrestrial Impact (VarSITI) Completion Symposium 2019 and the SCOSTEP 14th Quadrennial Solar-Terrestrial Physics Symposium (STP14)" J. Atmos. Sol.-Terr. Phys. . https://doi.org/10.1016/j.jastp.2021.105593
  18. ** Mandal, S., and D. Pallamraju, (2020), Thermospheric gravity wave characteristics in the daytime over low-latitudes during geomagnetic quiet and disturbed conditions, J. Atmos. Sol.-Terr. Phys. https://doi.org/10.1016/j.jastp.2020.105470
  19. ** Mandal, S., D. Pallamraju, and P. Suryawanshi, (2020), Changes in the daytime thermospheric gravity wave propagation characteristics over low-latitudes in response to the variation in Solar flux, J. Atmos. Sol.-Terr. Phys. https://doi.org/10.1016/j.jastp.2020.105414.
  20. Pallamraju, D., D. K. Karan, F. I. Laskar, T. Vijaya Lakshmi, S. Chakrabarti, (2020), Effect of solar flux versus compositional variations on the variability of daytime oxygen optical emission rates over low- and mid-latitudes, J. Atmos. Sol.-Terr. Phys., 205, 105293, 2020. https://doi.org/10.1016/j.jastp.2020.105293
  21. ** Karan, D. K., and D. Pallamraju, (2020), On estimation of daytime equatorial vertical (ExB) plasma drifts using optical neutral dayglow emission measurements, Journal of Geophysical Research: Space Physics, https://doi.org/10.1029/2019JA026775.
  22. Laskar, F. I., J. P. McCormack, J. L. Chau, D. Pallamraju, P. Hoffmann, and R. P. Singh (2019), Interhemispheric Meridional Circulation During Sudden Stratospheric Warming, Journal of Geophysical Research: Space Physics, 124. https://doi.org/10.1029/2018JA026424.
  23. ** Mandal, S., D. Pallamraju, D. K. Karan, K. A. Phadke, R. P. Singh, P. Suryawanshi, (2019), On deriving gravity wave characteristics in the daytime upper atmosphere using radio technique, J. Geophys. Res.- Space Phys. https://doi.org/10.1029/2019JA026723
  24. Laskar, F. I., Stober, G., Fiedler, J., Oppenheim, M. M., Chau, J. L., Pallamraju, D., Pedatella, N. M., Tsutsumi, M., and Renkwitz, T.: Mesospheric Anomalous Diffusion During Noctilucent Clouds, Atmos. Chem. Phys. https://doi.org/10.5194/acp-2018-1028, 2019.
  25. ** Singh, R. P., and D. Pallamraju, (2018), Results on mesospheric temperature inversions observed in OH and O2 rotational temperatures from Mount Abu (24.6 N, 72.8 E), India, J. Geophys. Res. 123, 8823 - 8834. Chosen as "Research Spotlight" in AGU's Earth & Space Science News (published on 27 March 2019).
  26. ** Karan, D. K., and D. Pallamraju, (2018), Effect of geomagnetic storms on the daytime low-latitude thermospheric wave dynamics, J. Atmos. Sol.-Terr. Phys., 170, 35-47.
  27. ** Karan, D. K., and D. Pallamraju, (2017), Small-scale longitudinal variations in the daytime equatorial thermospheric wave dynamics as inferred from oxygen dayglow emissions, J. Geophys. Res.- Space Phys. 122, https://doi.org/10.1002/2017JA023891
  28. ** Singh, R. P., and D. Pallamraju, (2017), Near Infrared Imaging Spectrograph (NIRIS) for ground-based mesospheric OH(6-2) and O2(0-1) intensity and temperature measurements, J. Earth Syst. Sci. 126:88.
  29. ** Singh, R. P., and D. Pallamraju, (2017), Large- and small-scale periodicities in the mesosphere as obtained from variations in O2 and OH nightglow emissions, Ann. Geophys. 35, 227-237.
  30. ** Karan, D. K., D. Pallamraju, K. Phadke, T. Vijayalakshmi, T. K. Pant, S. Mukherjee (2016), Electrodynamical influence on the diurnal behaviour of neutral daytime airglow emissions, Ann. Geopyhs., 34, 1019-1030.
  31. ** Singh, R. P., and D. Pallamraju, (2016), Effect of cyclone Nilofar on mesospheric wave dynamics as inferred from optical nightglow observations from Mt. Abu, India, J. Geophys. Res., https://doi.org/10.1002/2016JA022412
  32. Pallamraju, D. , D. K. Karan, and K. A. Phadke (2016), First three dimensional wave characteristics in the daytime upper atmosphere derived from ground-based multiwavelength oxygen dayglow emission measurements, Geophys. Res. Lett. , 42, https://doi.org/10.1002/2016GL069074
  33. ** Yadav, S., and D. Pallamraju, (2015), On the coupled interactions between Ring current intensity and high-latitude ionospheric electron density variations, J. Atmos. Sol.-Terr. Phys., 125-126, 50-58, 2015, https://doi.org/10.1016/j.jastp.2015.02.006
  34. Pramitha, M., M. Venkat Ratnam, A. Taori, B. V. Krishna Murthy, D. Pallamraju, and S. Vijaya Bhaskar Rao (2015), Evidence for tropospheric wind shear excitation of highphase- speed gravity waves reaching the mesosphere using the ray-tracing technique, Atmos. Chem. Phys., 15, 2709-2721, 2015, https://doi.org/10.5194/acp-15-2709-2015
  35. ** Singh, R. P., and D. Pallamraju, (2015), On the Latitudinal Distribution of Mesospheric Temperatures During Sudden Stratospheric Warming Events, J. Geophys. Res., Space Phys., 119, https://doi.org/10.1002/2014JA020355
  36. ** Laskar, F. I., D. Pallamraju, B. Veenadhari, T. Vijaya Lakshmi, M. Anji Reddy, and S. Chakrabarti (2015), Gravity waves in the thermosphere: Solar activity dependence, Adv. Space Res., 55(2015), pp 1651-1659. http://dx.doi.org/10.1016/j.asr.2014.12.040
  37. ** Laskar, F. I., and D. Pallamraju, (2015), Does sudden stratospheric warming induce meridional circulation in the mesosphere thermosphere system? J. Geophys. Res. Space Phys., 119, 10133-10143, https://doi.org/10.1002/2014JA020086
  38. Pallamraju, D. , S. Gurubaran, and M. Venkat Ratnam (2014), A brief overview on the special issue on CAWSES-India Phase II program, J. Atmos. Sol.-Terr. Phys., 121, pp 141-144.
  39. ** Laskar, F. I., D. Pallamraju, , and B. Veenadhari (2014), Vertical coupling of atmospheres: Dependence on strength of sudden stratospheric warming and solar activity, Earth, Planets and Space, 66(1), 1-10.
  40. Pramitha, M., M. Venkat Ratnam, Alok Taori, B. V. Krishna Murthy, D. Pallamraju, , and S. Vijaya Bhaskar Rao, (2014), Identification of gravity wave sources using reverse ray tracing over Indian region, Atmos. Chem. Phyis. Discuss., 14, 19587-19623, doi:https://doi.org/10.5194/acpd-14-19587-2014, 2014
  41. Bagiya, M. S., R. Hazarika, F. I. Laskar, S. Sunda, S. Gurubaran, D. Chakrabarty, P. K. Bhuyan, R. Sridharan, B. Veenadhari, and D. Pallamraju, (2014), Effects of prolonged southward interplanetary magnetic field on low-latitude ionospheric electron density, J. Geophys. Res. Space Physics, 119, 5764-5776, https://doi.org/10.1002/2014JA020156
  42. Pallamraju, D., J. Baumgardner, R. P. Singh, F. I. Laskar, C. Mendillo, T. Cook, S. Lockwood, R. Narayanan, T. K. Pant, and S. Chakrabarti (2014), Daytime wave characteristics in the mesosphere lower thermosphere region: Results from the Balloon-borne Investigations of Regional-atmospheric Dynamics experiment, J. Geophys. Res. Space Physics, 119,2229 - 2242, https://doi.org/10.1002/2013JA019368
  43. ** Laskar, F. I., D. Pallamraju, T. Vijaya Lakshmi, M. Anji Reddy, B. M. Pathan, and S. Chakrabarti (2013), Investigations on vertical coupling of atmospheric regions using combined multiwavelength optical dayglow, magnetic, and radio measurements, J. Geophys. Res. Space Physics, 118, 4618-4627, https://doi.org/10.1002/jgra.50426
  44. Pallamraju, D., F. I. Laskar, R. P. Singh, J. Baumgardner, and S. Chakrabarti (2013), MISE: A Multiwavelength Imaging Spectrograph using Echelle grating for daytime optical aeronomy investigations, J. Atmos. Sol-Terr. Phys., 103, 176 - 183.
  45. Sekar, R., S. P. Gupta, Y. B. Acharya, D. Chakrabarty, D. Pallamraju, B. M. Pathan, D. Tiwari, and R. K. Choudhary (2013), Absence of streaming plasma waves over Thumba in recent times: Is it related to the drift of the dip equator?, J. Atmos. Sol-Terr. Phys., 103, pp. 8 - 15.
  46. Pallamraju, D., G. Lu, and C. Lin (2012), Overview of the Special issue on the Atmospheric Coupling Processes in the Sun-Earth System, J. Atmos. Sol-Terr. Phys., 75 - 76, pp. 1 - 4.
  47. Sekar, R., D. Chakrabarty, D. Pallamraju, (2012), Optical signature of shear in the zonal plasma flow along with a tilted structure associated with Equatorial Spread F during a space weather event, J. Atmos. Sol-Terr. Phys. 75-76, pp 57-63.
  48. D. Pallamraju, S. Chakrabarti, and S. Solomon (2011), On deriving auroral particle fluxes in the daytime using combined ground-based optical and radar measurements, J. Geophys. Res., 116, A04309, https://doi.org/10.1029/2010JA015934
  49. ** Das, U., D. Pallamraju, S. Chakrabarti (2010), Effect of an X-class solar flare on the OI 630.0nm dayglow emission, J. Geophys. Res., 115, A08302, https://doi.org/10.1029/2010JA015370 Selected as AGU Editor's Choice "Space Weather" August 2012.
  50. Pallamraju, D., U. Das, S. Chakrabarti, (2010), Short- and long-timescale thermospheric variability as observed from OI 630.0 nm dayglow emissions from low-latitudes, J. Geophys. Res., 115, A06312, https://doi.org/10.1029/2009JA015042
  51. Prakash, S., D. Pallamraju, and H. S. S. Sinha (2009), Role of the equatorial ionization anomaly in the development of the evening prereversal enhancement of the equatorial zonal electric field, J. Geophys. Res., 114, A02301, https://doi.org/10.1029/2007JA012808
  52. Pallamraju, D., and S. Chakrabarti, Contributions of Imaging Echelle Spectrographs to Daytime Optical Aeronomy, J. Atmos. Sol-Terr. Phys., 58, 1459 - 1471, 2006.
  53. Chakrabarti, S., and D. Pallamraju, Round the clock ground-based imaging spectroscopy of space weather effects on the thermosphere and ionosphere, Advances in Geosciences, Volume2: Solar Terrestrial (ST) Science, Editor-in-Chief: Wing-Huen Ip. Volume Editor-in-Chief: Marc Duldig. pp 201 - 218, 2006.
  54. Basu, S., and D. Pallamraju, Science rationale for Climate and Weather of the Sun Earth System (CAWSES): SCOSTEP's interdisciplinary program for 2004-2008, Advances in Space Research , 38, 1781 - 1791, 2006.
  55. Basu, Su, Sa Basu, J. Makela, R. Sheehan, E. MacKenzie, P. Doherty, J. W. Wright, M. J. Keskinen, D. Pallamraju, L. Paxton, F. T. Berkey, (2005). Two components of ionospheric plasma structuring at midlatitudes observed during the large magnetic storm of October 30, 2003, Geophys. Res. Lett., 32, L12S06, https://doi.org/10.1029/2004GL021669 Selected as AGU Editor's Choice "Space Weather" May 2005.
  56. Pallamraju, D., and S. Chakrabarti, (2005) First ground-based measurements of OI 6300 A Daytime aurora Over Boston in Response to the 30 October 2003 geomagnetic Storm, Geophys. Res. Lett., , 32, L03S10, https://doi.org/10.1029/2004GL021417
  57. Pallamraju, D., S. Chakrabarti, R. Doe and T. Pedersen, First Ground-based OI 630 nm optical measurements of daytime cusplike and F-region auroral precipitation, Geophys. Res. Lett., 31, L08807 https://doi.org/10.1029/2003GL019173, (2004).
  58. Pallamraju, D., S. Chakrabarti and C. E. Valladares, Magnetic Storm Induced Enhancement in Neutral Composition at Low-latitudes as Inferred by O(1D) Dayglow Measurements From Chile, 22, 3241-3250, Annales Geophysics, 2004.
  59. Galand, M., J. Baumgardner, D. Pallamraju, S. Chakrabarti, U. P. Lovhaug, D. Lummerzheim, B. Lanchaster, and M. H. Rees, (2004) Spectral imaging of proton aurora and twilight at Tromso, Norway, Journal of Geophysical Research, 109, A07305, https://doi.org/10.1029/2003JA010033
  60. Pallamraju, D., J. Baumgardner and S. Chakrabarti, HIRISE: A ground-based High Resolution Imaging Spectrograph using Echelle grating for measuring daytime airglow and auroral emissions, J. Atmos. Solar-Terr. Phys., 64 , 1581-1587, 2002.
  61. Chakrabarti, S., D. Pallamraju, J. Baumgardner and J. Vaillancourt, HiTIES: A High Throughput Imaging Echelle Spectrograph for Ground-Based Visible Airglow and Auroral Studies, J. Geophys. Res.,106, 30337-30348, 2001.
  62. Pallamraju, D., J. Baumgardner, S. Chakrabarti and T. R. Pedersen, Simultaneous ground-based observations of an auroral arc in daytime O I 630.0nm emission and by Incoherent Scatter Radar, J. Geophys. Res., 106, 5543-5549, 2001.
  63. Pallamraju, D., J. Baumgardner, and S. Chakrabarti, A multiwavelength investigation of the Ring effect in the day sky spectrum, Geophys. Res. Lett., 27, 1875-1878, 2000.
  64. Sridharan R., D. Pallamraju, V. V. Somayajulu, Alok Taori, D. Chakrabarty and R. Raghavarao, Imprint of equatorial electrodynamics in the OI 630.0nm dayglow J. Atmos. and Solar Terr. Phys., 61, 1143-1155, 1999.
  65. Pallamraju, D., and R. Sridharan, Ground-based optical measurements of daytime aurora -- a new means of investigating space-weather related processes, Proc. Indian Acad. of Sci. (Earth Planet Sci.), 107, 203-211, 1998.
  66. R. Sridharan, N. K. Modi, D. Pallamraju, R. Narayanan, Tarun K Pant, Alok Taori, and D Chakrabarty, A Multiwavelength Daytime Photometer -- a new tool for the investigation of atmospheric processes, Measurement Sci. and Tech., 9,, 585-591, 1998.
  67. Pallamraju, D., and R. Sridharan, High-resolution 2-D maps of OI 630.0nm thermospheric dayglow from equatorial latitudes, Ann. Geophys., 16, 997-1006, 1998.
  68. R. Sridharan, H. Chandra, S. R. Das, H.S.S. Sinha, D. Pallamraju, R. Narayanan, S. Raizada, R. N. Misra, R. Raghavarao, G. D. Vyas, P. B. Rao, P. V. S. Ramarao, V. V. Somayajulu, V. V. Babu and A. D. Danilov, Ionization hole capmaign -- A coordinated rocket and ground-based study at the onset of equatorial spread-F - First results, J. Atmos. Terr. Phys., 59, 2051, 1997.
  69. Pallamraju, D., R.Sridharan, S.Gurubaran, and R. Raghavarao, First results from ground-based daytime optical investigations of the development of the Equatorial Ionization Anomaly, Ann. Geophys., 14, 238-245, 1996.
  70. Pallamraju, D., R. Sridharan, R. Narayanan, N. K. Modi, R. Raghavarao, and B. H. Subbaraya, Ground-based optical observations of daytime auroral emissions from Antarctica, J. Atmos. Terr. Phys., 57, 1591-1597, 1995.
  71. R. Sridharan, D. Pallamraju,R. Narayanan, N. K. Modi, B. H. Subbaraya, and R. Raghavarao, Daytime measurements of optical auroral emissions from Antarctica, Curr. Sci., 68, 830-833, 1995.
  72. Sridharan R., Pallamraju, D., R. Raghavarao and P. V. S. Ramarao, Precursor for Equatorial Spread-F in OI 630.0 nm dayglow, Geophys. Res. Lett., 21, 2797-2800, 1994.
  73. Sridharan R., R. Narayanan, N. K. Modi and Pallamraju, D., A novel mask design for multiwavelength dayglow photometry, Appl. Opt., 32, 4178-4180, 1993.

    74. Refereed Technical Reports/ Publications in Proceedings:

  74. Pallamraju, D., S. Mandal, S. Saha, S. Kumar and T. K. Pant, (2023). New Insights on the Precursors to the Onset of Equatorial Plasma Irregularity Generation, 2022 URSI Regional Conference on Radio Science (USRI-RCRS), Indore, India, 2022, pp. 1-4, https://doi.org/10.23919/URSI-RCRS56822.2022.10118477.
  75. **Kushwaha, P. K., S. Urmalia, D. Pallamraju, R. P. Singh and P. Suryawanshi (2021). Design and Development of Filter Wheel Controller Card, Temperature Controller and Automated Software using Labview for CMAP Instrument PRL-TN-2021-112
  76. **Choithani, V., R. Jain, and D. Pallamraju, Study of solar flares associated with Geoeffective CMEs, Proceedings IAU Symposium, 340, 2018 pp1-2., https://doi.org/10.1017/S1743921318001072
  77. Pallamraju, D., and S. Solomon, Role of the Sun and the Middle Atmosphere/Thermosphere/Ionosphere In Climate (ROSMIC)" VarSITI Newsletter, Vol. 4, pp3-4, November 2016.
  78. ** Phadke, K. A., R. Narayanan, R. P. Singh, and D. Pallamraju, An Automated CCD-based Multi-wavelength Airglow Photometer (CMAP) for Optical Aeronomy Studies, PRL Technical Note-2014-107, 2014.
  79. ** Singh, R. P., D. Pallamraju, R. Narayanan, Development of Automated Digital Optical Imagers for Rocket Trail Photography, PRL Technical Note-102, 2013.
  80. Pallamraju, D., Optical Aeronomy Studies at Physical Research Laboratory, India, CAWSES Task Group 4 Newsletter, Vol. 8, pp 4-5, April 2012.
  81. Pallamraju, D., Optical Investigations of Mesosphere and Lower Thermosphere (MLT) Region, Proceedings of the DST workshop on Growth of Geomagnetism: Challenges and Opportunities in the next two decades, Indian Institute of Geomagnetism, New Panvel, Mumbai, 12 - 13 December 2011.
  82. ** Shah, P., and D. Pallamraju, Real-time automated software for operati on of multiple CCD cameras and interfacing with the balloon telemetry, PRL Technical Note-99 2011.
  83. Sekar, R., Y. B. Acharya, D. Chakrabarty, D. Pallamraju, S. P. Gupta, and B. M. Pathan, Investigations on the effects of annular solar eclipse in the equatorial ionosphere Proceedings of the National Workshop: Results on Solar Eclipse (NaWRoSE), SPL, VSSC, January 27-28, 2011.
  84. Pallamraju, D., Optical signatures of Space Weather disturbances, Proceedings of National Workshop on Atmospheric and Space Sciences, Calcutta University, Calcutta, 23-24 November 2010
  85. Pallamraju, D., Optical Observations, Proceedings of the SERC-DST school on Space Weather, Indian Institute of Geomagnetism, Mumbai, April 2010.
  86. Pallamraju, D., Introduction to Space Weather and the Status of Forecast Methodologies, Proceedings of the SERC-DST school on Aviation Meteorology with Special Emphasis on Modern Observational Techniques and Nowcasting, Air Force Administrative College, Coimbatore, December 2008.
  87. Pallamraju, D., A combined optical and modeling approach to estimate the incident particle fluxes into the Earths's atmosphere, Proceedings of the Energetic Coupling of Atmospheric Regions, Mumbai, India, 2008.
  88. Pallamraju, D., Climate and Weather of the Sun-Earth System, Proceedings of the SERC-DST school on Atmospheric and Space Sciences, Andhra University, Visakhapatnam, September 2008.
  89. Pallamraju, D., Space Weather effects on the Geospace, Proceedings of National Seminar on Emerging Trends in Space and Aviation Meteorology, New Delhi, February, 2008.
  90. Basu, S. and D. Pallamraju, Science rationale for CAWSES (Climate and Weather of the Sun-Earth System): SCOSTEP's interdisciplinary program for 2004- 2008, Proceedings of the Radio Beacon Symposium, Boston, 2004.
  91. Pallamraju, D., Applications of optical spectrographs for passive remote sensing of upper atmosphere, Proceedings of the CEDAR Passive Aeronomy Workshop, 2004.
  92. Pallamraju, D., Highlight 1: First ground-based observati ons of daytime cusp and F-region auroral precipitation, Proceedings of the CEDAR Passive Aeronomy Workshop, 2004.
  93. Pallamraju, D., Highlight 2: Daytime Redline Aurora over Boston, Proceedings of the CEDAR Passive Aeronomy Workshop, 2004.
  94. Sridharan, R., D. Pallamraju, N. K. Modi and R. Narayanan, Report on the scientific activities under the 'Optical Aeronomy' programme carried out during the XIV scientific expedition (summer component), Fourteenth Indian Expedition to Antarctica, Scientific Report, Technical Publication No. 12, pp 71-91, 1998. http://hdl.handle.net/123456789/413
  95. Sridharan, R., Pallamraju, D., R. Narayanan, and N. K. Modi, Optical Aeronomy from Antarctica - Measurements of daytime auroral emissions, Thirteenth Indian Expedition to Antarctica, Scientific Report, Technical Publication No. 11, pp 47 - 68, 1997. http://hdl.handle.net/123456789/714
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