Full List of Publications

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2025

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56) 

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55) Rakhijul Alam Faruque, Sujay Pal∗, Gahul Amin, Sushanta Kumar Mondal, Y. Hobara, Investigating the Effects of the Super Geomagnetic Storm of May 2024 on the DC and AC Global Electric Circuit, JGR (submitted)

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54) 52) A. Sen, B. Das, S. Pal, S.K. Mondal, Impact of the Severe Geomagnetic Storm of April 2023 on the Ionosphere observed by VLF/LF signals and Ionosonde, 2024, JASTP (submitted).

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53) Rakhijul Alam Faruque, Sujay Pal∗, , Gahul Amin, Sushanta Kumar Mondal,  Atmospheric Electric Field Variations and its Correlation with Air Quality Index as Observed from Two Low-Latitude Indian Stations, JASTP (in press)
 

52) K. Barman, S. Adhikary, B. Das, S. Pal*, P. K. Haldar, Low-latitude sub-ionospheric VLF radio signal disturbances due to solar flares: Effects on the signal attenuation and waveguide modes, 2025, JASTP, Volume 268, March 2025, 106433, https://doi.org/10.1016/j.jastp.2025.106433.

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2024

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51) K. Barman, B. Das, S. Pal, P. K. Haldar, S. K. Midya, S. Pal, S. K. Mondal, D-region ionospheric disturbances due to the December 2019 solar eclipse observed using multi-station VLF radio network, Volume 74, Issue 3, 1 August 2024, Pages 1460-1470,   https://doi.org/10.1016/j.asr.2024.04.049

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50) A. Sen, S. Pal, S. K. Mondal, Mid-latitude ionospheric disturbances during the major Sudden Stratospheric Warming event of 2018 observed by sub-ionospheric VLF/LF signals, Advances in Space Research, Volume 73, Issue 1, 1 January 2024, Pages 767-779,  https://doi.org/10.1016/j.asr.2023.10.025

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49) T. Basak, Y. Hobara, S. Pal, T. Nakamura, J. Izutsu, T. Minatohara, Modeling of Solar Eclipse effects on the sub-ionospheric VLF/LF signals observed by multiple stations over Japan, Advances in Space Research, Volume 73, Issue 1, 1 January 2024, Pages 736-746, https://doi.org/10.1016/j.asr.2023.09.063

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2023

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​48) Pal, S.; Hobara, Y.; Shvets, A.; Schnoor, P.W.; Hayakawa, M.; Koloskov, O. First Detection of Global Ionospheric Disturbances Associated with the Most Powerful Gamma Ray Burst GRB221009A. Atmosphere 2023, 14, 217. https://doi.org/10.3390/atmos14020217.

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2022

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47) A. Sen, S. K. Mondal, S. Pal, Effects of Sudden Stratospheric Warming (SSW) on the Upper Atmosphere, Advances in Modern and Applied Sciences, Scientific Research Publishing, Inc.ISBN: 978-1-64997-437-2, 179-186, https://www.scirp.org/book/detailedinforofabook.aspx?bookid=2907 (Book Chapter)

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46) K. Barman, B. Das, P. K. Haldar, S. Pal, Ionospheric Effects of Cyclonic Storms: A Brief Review, 2022, Advances in Modern and Applied Sciences, Scientific Research Publishing, Inc.
ISBN: 978-1-64997-437-2, 164-170, https://www.scirp.org/book/detailedinforofabook.aspx?bookid=2907 (Book Chapter)

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45) B, Das., K, Barman., S, Pal*., & P. K, .H. (2022). Impact of three solar eclipses of 2019-2020 on the D-region ionosphere observed from a sub-tropical low-latitude VLF radio station. Journal of Geophysical Research: Space Physics, 127, e2022JA030353. https://doi.org/10.1029/2022JA030353

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2021

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44) Das, B., Pal, S., Haldar, P. K., VLF radio signal perturbations during two recent solar eclipses observed from a VLF receiving station, Cooch Behar, India, URSI GASS 2021 (B. Das has received the URSI Young Scientist Award for this paper). 

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43) Barman, K., Das, B., Pal, S., Haldar, P. K., 2021, Effects of tropical cyclones on the VLF atmospherics observed from low latitude receiving stations, URSI GASS 2021 (K. Barman has received the URSI Young Scientist Award for this paper). 

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42) Das et al., 2021, Impact of two tropical cyclones on the radio atmospherics observed using VLF receivers, submitted, (https://www.essoar.org/doi/abs/10.1002/essoar.10507567.1 )

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​41) K. Giri, S. Pal*, T.K. Biswas, S.K. Midya, 2020, Simulation of Diurnal Variation of Sub-Ionospheric VLF Transmitter Signals Using Machine Learning Approach, 2021, Romanian Journal of Physics (European Physics Society),  66, 807, IF:1.888, ISSN: 1221-146X, https://rjp.nipne.ro/2021_66_3-4/RomJPhys.66.807.pdf 
 

40) B. Das, A. Sen, PK Haldar, S. Pal*, 2021, Response of the Sub-Ionospheric VLF Signals to the Super Cyclonic Storm Amphan: First observation from Indian Subcontinent (Short Communication), Journal of Atmospheric and Solar-Terrestrial Physics (Elsevier), Volume 220, 1 September 2021, IF:1.737, 105668, doi:10.1016/j.jastp.2021.105668.

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39) S. K. Mondal, S. Pal, A. Sen, M. Rahaman, S. K. Midya, 2021, Long-lasting disturbances in the mid-latitude sub-ionospheric VLF radio signal during the super geomagnetic storm of 17th March 2015, Advances in Space Research, (Elsevier), Volume 68, Issue 6, 15 September 2021, Pages 2295-2308 https://doi.org/10.1016/j.asr.2021.04.044.

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38) B. Das, A. Sen, P.K. Haldar, S Pal, 2021, VLF radio signal anomaly associated with geomagnetic storm followed by an earthquake at a subtropical low latitude station in North-Eastern part of India, Indian Journal of Physics, 96, 13–24,  IF: 1.947, ISSN: 0974-9845, https://doi.org/10.1007/s12648-020-01966-2

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2020
 

37) B. Das, S. Sarkar, P.K. Haldar, S Pal*, 2020, D-region ionospheric disturbances associated with the Extremely Severe Cyclone Fani over North Indian Ocean as observed from two tropical VLF stations, Advances in Space Research, Volume 67, Issue 1, pp. 75-86, IF: 2.12, ISSN: 0273-1177

https://doi.org/10.1016/j.asr.2020.09.018.

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36) S Pal*, S. Sarkar, S. K. Midya, S. K. Mondal, Y. Hobara, Low-Latitude VLF Radio Signal Disturbances Due to the Extremely Severe Cyclone Fani of May 2019 and Associated Mesospheric Response, Journal of Geophysical Research: Space Physics, 125(5), e2019JA027288, ISSN:2169-9402, IF: 2.81,  https://doi.org/10.1029/2019JA027288

35) SK Midya, S. Pal*, R. Dutta et al., 2020, A preliminary study on pre-monsoon summer thunderstorms using ground-based total lightning data over Gangetic West Bengal, Indian Journal of Physics, https://doi.org/10.1007/s12648-020-01681-y

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34) S. Pal et al., 2020, Response of the mesosphere and lower ionosphere to the Extremely Severe Cyclone ‘Fani’ of 2019 over the North Indian Ocean (Oct. 2020, pp. 1-3),  XXXIIIrd General Assembly and Scientific  Symposium of the International Union of Radio Science,  ISBN: 978-9-4639-6800-3, ISSN: 26
42-4339, Publisher: IEEE.

33) Das et al., 2020, Combined effects of Geomagneticstorm and regional Earthquake on low latitude VLF radio signals: Acase Study (Oct. 2020, pp. 1-3), XXXIIIrd General Assembly and Scientific  Symposium of the International Union of Radio Science, Publisher: IEEE, ISBN: 978-9-4639-6800-3, ISSN: 2642-4339, Publisher: IEEE.
 

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2019

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32) S. Pal and S. K Midya, A study of total lightning characteristics of thunderstorms over Gangetic West Bengal, URSI AP-RASC, 2019, Publisher: IEEE.
 

31) T. Basak, Y Hobara and S. Pal, Modeling of VLF network observations due to lower ionospheric perturbation during a solar eclipse, URSI AP-RASC, 2019, Publisher: IEEE.

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Sujay Pal, Arnab Sen, Sushanta Kumar Mondal, Yasuhide Hobara, and Subrata Kumar Midya ,High latitude and mid-latitude ionospheric disturbances associated with some major stratospheric warming events in the Northern hemisphere, Geophysical Research Abstracts Vol. 21, EGU2019-1624, 2019 EGU General Assembly 2019. 

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2018

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30) S. Pal, “Remote sensing of the Ignorosphere: Need for a complete earth-ionosphere radio wave propagation model”, 2018, Exploring the Universe: From near space to extra-galactic, Astrophysics and Space Science Proceedings, Springer International Publishing AG.

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2017

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29) Pal S.*, Hobara Y., Chakrabarti S.K., and Schnoor P. W., Effects of the major Sudden Stratospheric Warming event of 2009 on the sub-ionospheric Very Low Frequency/Low Frequency radio signals, June 2017, J. Geophys. Res. Space Physics, 122, doi:10.1002/2016JA023813, Impact Factor: 3.462 (Highlighted in Journal).

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28) S. Pal, Y. Hobara, S. K. Chakrabarti, and P. W. Schnoor, Response of the sub-ionospheric VLF/LF signals to the major SSW event of 2009, URSI GASS, 2017, DOI: 10.23919/URSIGASS.2017.8105404, Publisher: IEEE.
 

27) S. K Maji, S. K Chakrabarti, D. Sanki and S. Pal*, Topside ionospheric effects of the annular solar eclipse of 15th January 2010 as observed by DEMETER satellite, Journal of Atmospheric and Solar-Terrestrial Physics, April 2017, Vol-159, pp-1-6, ISSN: 1364-6826.

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2016

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26) S. Pal* and Y. Hobara, Mid-latitude atmosphere and ionosphere connection as revealed by very low frequency signals, Journal of Atmospheric and Solar-Terrestrial Physics, February 2016, Vol-138-139, pp-227-232, ISSN: 1364-6826, Impact Factor: 1.506.

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2015

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25) K. Tatsuta, Y. Hobara, S. Pal and M. Balikhin, VLF sub-ionospheric anomaly due to geomagnetic storms: a statistical study, November 2015, Annales Geophysicae., Vol-33, 1457–1467, ISSN: 0992-7689.
 

24) Palit S., Basak T., Pal S., Chakrabarti S. K., Theoretical study of lower ionospheric response to solar flares: sluggishness of D-region and peak time delay, Astrophysics Space Science, March 2015, Vol. 356-1, 19-28, ISSN: 0004-640X.

23) S. Pal*, S. Chakraborty, S. K. Chakraborti, On the use of Very Low Frequency transmitter data for remote sensing of atmospheric gravity and planetary waves, February 2015, Advances in Space Research, Vol. 55-4, 1190-1198, ISSN: 0273-1177.

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2014

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22) S. Sasmal, S. Pal and S. K. Chakrabarti, Study of long path VLF signal propagation characteristics as observed from Indian Antarctic station, Maitri, Advances in Space Research, October 2014, Vol. 54-8, 1619-1628, ISSN: 0273-1177.

 

21) S. Pal, S. and S. K. Chakrabarti, Remote Sensing of Atmospheric Gravity Waves (GWs) and Planetary Wave Type Oscillations (PWTOs) in the upper mesosphere-lower ionosphere system using the Very Low Frequency transmitter data, October 2014, Published in: General Assembly and Scientific Symposium (URSI GASS), DOI: 10.1109/URSIGASS.2014.6929556, Publisher: IEEE, Print ISBN: 978-1-4673-5225-3.

20) S. Pal, S. K. Maji, and S. K. Chakrabarti, Low latitude sub-ionospheric VLF signal behaviour during the two recent solar eclipses: observation and simulation, October 2014, Published in: General Assembly and Scientific Symposium (URSI GASS), DOI: 10.1109/URSIGASS.2014.6929557, Publisher: IEEE, Print ISBN: 978-1-4673-5225-3.

19) S. Chakraborty, S. Pal, and S. K. Chakrabarti, Characteristics of lightning associated transient perturbations in low latitude VLF paths, October 2014, Published in: General Assembly and Scientific Symposium (URSI GASS), DOI: 10.1109/URSIGASS.2014.6929559, Publisher: IEEE, Print ISBN: 978-1-4673-5225-3.
 

18) T. Basak, S. K. Chakrabarti, S. Sasmal, and S. Pal, Study of low-latitude ionospheric D-region negative ion profile during an M-class solar flare using VLF propagation effects, October 2014, Published in: General Assembly and Scientific Symposium (URSI GASS), DOI: 10.1109/URSIGASS.2014.6929789, Publisher: IEEE, Print ISBN: 978-1-4673-5225-3.

17) Palit, S.; Basak, T.; Pal, S.; Mondal, S. K.; Chakrabarti, S. K., Effect of solar flares on ionospheric VLF radio wave propagation, modeling with GEANT4 and LWPC and determination of effective reflection height, October 2014, General Assembly and Scientific Symposium (URSI GASS), DOI: 10.1109/URSIGASS.2014.6929558, Publisher: IEEE, Print ISBN: 978-1-4673-5225-3.

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2013

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16) Palit S., Basak T., Mondal S. K., Pal S. and Chakrabarti S. K., Modeling of the Very Low Frequency (VLF) radio wave signal profile due to solar flares using the GEANT4 Monte Carlo simulation coupled with ionospheric chemistry, September 2013, Atmospheric Chemistry and Physics, Vol. 13, 9159–9168, ISSN: 1680-7316.

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2012

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15) S. Pal*, S. K. Maji and S. K. Chakrabarti, First Ever VLF Monitoring of Lunar Occultation of a Solar Flare during the 2010 Annular Solar Eclipse and its effects on the D-region Electron Density Profile, December 2012, Planetary and Space Science, Vol. 73, 310-317, ISSN: 0032-0633.
 

14) S. K. Chakrabarti, S. Pal, S. Sasmal et al., VLF campaign during the total eclipse of 22nd July, 2009: Observations and interpretations, September 2012, Journal of Atmospheric and Solar-Terrestrial Physics, Vol. 86, 65-70, ISSN: 1364-6826.
 

13) S. Pal*, S. K. Chakrabarti and S. K. Mondal, Modeling of sub-ionospheric VLF signal perturbations associated with total solar eclipse 2009, in Indian subcontinent, July 2012, Advances in Space Research, Vol. 50, 196–204, ISSN: 0273-1177.
 

12) S. K. Chakrabarti, S. K. Mondal, S. Sasmal, S. Pal et al., VLF signals in summer and winter in the Indian sub-continent using multi-station campaigns, May 2012, Indian Journal of Physics, Vol. 86-5, 323–334, ISSN: 0973-1458.
 

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2011

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11) S. Pal*, T. Basak and S. K. Chakrabarti, Results of computing amplitude and phase of the VLF waves using wave-hop theory, Advances in Geosciences, 2011, Solar Terrestrial (ST), Vol. 27, 1-11, World Scientific Publishing Company, ISBN-10 981-4355-40-2.

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10) S. Pal, T. Basak, S. K. Chakrabarti, Modeling VLF signal amplitudes over Indian sub-continent during the total solar eclipse, October 2011, General Assembly and Scientific Symposium XXXth URSI, DOI: 10.1109/URSIGASS.2011.6051008, Publisher: IEEE, Print ISBN: 978-1-4244-5117-3.

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9) S. Pal and S. K. Chakrabarti, Computation of amplitude and phase of VLF radio waves: Results from comparative study between wave-hop and waveguide mode theory, October 2011, General Assembly and Scientific Symposium, XXXth URSI, DOI: 10.1109/URSIGASS.2011.6051014, Publisher: IEEE, Print ISBN: 978-1-4244-5117-3.

8) T. Basak, S. Pal, S. K. Chakrabarti, VLF study of Ionospheric properties during solar flares of varied intensity for a fixed propagation path, October 2011, General Assembly and Scientific Symposium, XXXth URSI, DOI: 10.1109/URSIGASS.2011.6051004, Publisher: IEEE, Print ISBN: 978-1-4244-5117-3.

7) Chakrabarti, S.K., Pal, S., Sasmal, S., Mondal, S.K., Ray, S., Basak, T., Maji, S., VLF observational results of total eclipse of 22nd Jul , 2009 by ICSP team, October 2011, General Assembly and Scientific Symposium, XXXth URSI, DOI:10.1109/URSIGASS.2011.6051005, Publisher: IEEE, Print ISBN: 978-1-4244-5117-3.

6) Sasmal, S.; Chakrabarti, S.K.; Pal, S.; Basak, T., A comparative study of VLF signals from several transmitters around the world as observed from Maitri station, Antarctica, October 2011, General Assembly and Scientific Symposium XXXth URSI, DOI: 10.1109/URSIGASS.2011.6051002, Publisher: IEEE, Print ISBN: 978-1-4244-5117-3

5) Chakrabarti, S.K., Pal, S., Sasmal, S., Mondal, S.K., Ray, S., Basak, T., Results of VLF campaigns in Summer and Winter in Indian subcontinent, October 2011, General Assembly and Scientific Symposium XXXth URSI, DOI: 10.1109/URSIGASS.2011.6051007, Publisher: IEEE, Print ISBN: 978-1-4244-5117-3.

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4) Basak, T., Chakrabarti, S.K., Pal, S., Computation of the effects of solar phenomena on Global Ionospheric Weather using waveguide mode theory of VLF propagation, October 2011, General Assembly and Scientific Symposium XXXth URSI, DOI: 10.1109/URSIGASS.2011.6051009, Publisher: IEEE, Print ISBN: 978-1-4244-5117-3.
 

2010

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3. S. Pal and S. K. Chakrabarti, Theoretical models for computing VLF wave amplitude and phase and their applications, October 2010, AIP (American Institute of Physics) Conference Proceedings, Vol-1286, 42-60, ISBN: 978-0-7354-0841-8. (Download)
 

2. S.K. Chakrabarti, S. Sasmal, S. Pal and S.K. Mondal, Results of VLF campaigns in Summer, Winter and during Solar Eclipse in Indian Subcontinent and beyond, October 2010, AIP (American Institute of Physics) Conference Proceedings, Vol-1286, 61-76, ISBN: 978-0-7354-0841-8. (Download)

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1. T. Basak, S. K. Chakrabarti and S. Pal, Global effects on ionospheric weather over the Indian subcontinent at sunrise and sunset, October 2010, AIP (American Institute of Physics) Conference Proceedings, Vol-1286, 137-149, ISBN: 978-0-7354-0841-8. (Download)

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