Faculty Profiles

Faculty Profiles

Nag, Amitabh

Assistant Professor, Aerospace, Physics and Space Sciences

My current research interests are in the areas of applied electromagnetics, atmospheric electricity, lightning physics, and applications. My research group works on measurements and modeling of electrical discharges and energetic radiation in the Earth’s atmosphere, sensing technology development, electromagnetic wave propagation effects, lightning interaction with airborne vehicles, power lines, wind turbines and other tall objects, lightning protection, and meteorological applications of lightning data.

Please go to the Geospace Physics Laboratory (GPL) website for more information on my research in lightning, atmospheric electricity, and electromagnetics.

Google Scholar Profile

Educational Background

Ph.D., Electrical and Computer Engg., University of Florida, Gainesville, 2010

M.S., Electrical and Computer Engg., University of Florida, Gainesville, 2007

B. Tech, Electronics and Communication Engg., Heritage Institute of Technology, Kolkata, 2005

Current Courses

PHY 5017: Electromagnetic Theory 1

PHY 5018: Electromagnetic Theory 2

PHY 3440: Electromagnetic Theory

PHY 2002: Physics 2 - Electricity & Magnetism

Professional Experience

ACADEMIC EXPERIENCE

Assistant Professor, Florida Institute of Technology, 2016 - Present

Postdoctoral Associate, University of Florida, Gainesville, 2010-2011

 

INDUSTRY EXPERIENCE

Scientist and Product Manager, Vaisala, Boulder, Colorado, 2012 - 2016

Scientist, Vaisala, Tucson, Arizona, 2011-2012

 

PROFESSIONAL SOCIETY MEMBERSHIPS

Senior Member, Institute of Electrical and Electronic Engineers

Member: AGU, AMS, CIGRE, IEC

Selected Publications

RECENT JOURNAL PUBLICATIONS

L. D. Boggs, N. Liu, M. Peterson, S. Lazarus, M. Splitt, F. Lucena, A. Nag, and H. K. Rassoul, First observations of gigantic jets from geostationary orbit. Geophysical Research Letters, 46, https://doi.org/10.1029/2019GL082278, 2019.

A. Nag and K.L. Cummins, Magnetic field risetimes of negative lightning first return strokes over land and ocean, Geophys. Res. Lett., 45, https://doi.org/10.1029/2018GL080038, 2018.

B. G. Mailyan, A. Nag, M. J. Murphy, M. S. Briggs, J. R. Dwyer, W. Rison, et al., Characteristics of radio emissions associated with terrestrial gamma-ray flashes, Journal of Geophysical Research: Space Physics, 123, https://doi.org/10.1029/2018JA025450, 2018.

A. Nag and K. L. Cummins, Negative first stroke leader characteristics in cloud-to-ground lightning over land and ocean, Geophys. Res. Lett., 44, doi:10.1002/2016GL072270, 2017.

Y. Zhu, V. A. Rakov, M. D. Tran, and A. Nag, A study of National Lightning Detection Network responses to natural lightning based on ground truth data acquired at LOG with emphasis on cloud discharge activity, J. Geophys. Res. Atmos., 121, 14,651-14,660, doi:10.1002/2016JD025574, 2016.

B. M. Hare, M. A. Uman, J. R. Dwyer, D.M. Jordan, M. I. Biggerstaff, J. A. Caicedo, F. L. Carvalho, R. A. Wilkes, D. A. Kotovsky, W. R. Gamerota, J. T. Pilkey, T. K. Ngin, R. C. Moore, H. K. Rassoul, S. A. Cummer, J. E. Grove, A. Nag, D. P. Betten, and A. Bozarth, Ground-level observation of a terrestrial gamma ray flash initiated by a triggered lightning, J. Geophys. Res. Atmos., 121, 6511–6533, doi:10.1002/2015JD024426, 2016.

R. L. Holle, N. W. S. Demetriades, and A. Nag, Objective airport warnings over small areas using NLDN cloud and cloud-to-ground lightning data, Weather and Forecasting, Vol. 31, pp. 1061-1069, doi: 10.1175/WAF-D-15-0165.1, 2016.

M. D. Tran, V. A. Rakov, S. Mallick, J. R. Dwyer, A. Nag, S. Heckman, A terrestrial gamma-ray flash recorded at the Lightning Observatory in Gainesville, Florida, Journal of Atmospheric and Solar- Terrestrial Physics, 136 (2015), 86–93, 2015.

A. Nag and V. A. Rakov, A unified engineering model of the first stroke in downward negative lightning, J. Geophys. Res. Atmos., 121, doi:10.1002/2015JD023777, 2015.

A. Nag, M. J. Murphy, W. Schulz, and K. L. Cummins, Lightning Locating Systems: Insights on characteristics and validation techniques, Earth and Space Science, doi: 10.1002/2014EA000051, 2015.

A. Nag and V.A. Rakov, A transmission-line-type model for lightning return strokes with branches, Electric Power Systems Research, Vol. 118, pp. 3-7, doi: 10.1016/j.epsr.2014.07.021, 2015.

A. Nag and V. A. Rakov, Parameters of electric field waveforms produced by positive lightning return strokes, IEEE Transactions on EMC, Vol. 56 (4), pp. 932 – 939, doi: 10.1109/TEMC.2013.2293628, 2014.

S. Mallick, V.A. Rakov, T. Ngin, W.R. Gamerota, J.T. Pilkey, J.D. Hill, M.A. Uman, D.M. Jordan, A. Nag, and R.K. Said, Evaluation of the GLD360 performance characteristics using rocket-and-wire triggered lightning data, Geophysical Research Letters, Vol. 41 (10), pp. 3636–3642, doi: 10.1002/2014GL059920, 2014.

V.A. Rakov, S. Mallick, A. Nag, and V.B. Somu, Lightning Observatory in Gainesville (LOG), Florida: A review of recent results, Electric Power Systems Research, Vol. 113, pp. 95–103, 2014.

S. Mallick, V.A. Rakov, T. Ngin, W.R. Gamerota, J.T. Pilkey, J.D. Hill, M.A. Uman, D.M. Jordan, J.A. Cramer, and A. Nag, Performance characteristics of the NLDN for return strokes and pulses superimposed on steady currents, based on rocket-triggered lightning data acquired in Florida in 2004-2012, Journal of Geophysical Research, Vol. 119 (7), pp. 3825–3856, doi: 10.1002/2013JD021401, 2014.

 

RECENT CONFERENCE PUBLICATIONS

N. Watanabe, A. Nag, G. Diendorfer, H. Pichler, W. Schulz, Current and electric field changes associated with the initial stage of upward lightning, 34th International Conference on Lightning Protection, Rzeszow, Poland, 2 - 7 September, 2018.

B. Mailyan, A. Nag, M. Murphy, R. K. Said, M. S. Briggs, J. R. Dwyer, E. Cramer, O. J. Roberts, M. Stanbro, H. K. Rassoul, N. Watanabe, Investigating radio emissions associated with terrestrial gamma-ray flashes using NLDN, GLD360 and Fermi-GBM, XVI International Conference on Atmospheric Electricity, Nara, Japan, 17 - 22 June, 2018.

B. Mailyan, A. Nag, R.K. Said, M.J. Murphy, M.S. Briggs, J.R. Dwyer, E. Cramer, O.J. Roberts, M. Stanbro, and H.K. Rassoul, Characteristics of lightning associated with terrestrial gamma-ray flashes in various geographical regions, 25th International Lightning Detection Conference & 7th International Lightning Meteorology Conference, Ft. Lauderdale, Florida, 12 March, 2018.

N. Watanabe, A. Nag, G. Diendorfer, H. Pichler, W. Schulz. (2017), Close and distant electric fields due to lightning attaching to the Gaisberg Tower, 2017 International symposium on Lightning Protection (XIV SIPDA), Natal, Brazil, 2 - 6 October 2017.

A. Nag and K. L. Cummins, Negative return stroke characteristics in land-based and oceanic thunderstorms, 10th Asia-Pacific International Conference on Lightning, Krabi, Thailand, May 16-19, 2017.

N. Watanabe, A. Nag, G. Diendorfer, H. Pichler, W. Schulz, Close and distant electric fields due to lightning attaching to the Gaisberg Tower, 4th International Symposium on Winter Lightning, Joetsu, Japan, April 12-14, 2017.

A. Nag, R. L. Holle, M. J. Murphy, Cloud-to-ground lightning over the Indian subcontinent, 8th Conference on the Meteorological Applications of Lightning Data, Paper 861, 97th American Meteorological Society Annual Meeting, Seattle, Washington, Jan 22-26, 2017.

A. Nag and K. L. Cummins, Characteristics of negative cloud-to-ground lightning over land and ocean, 33rd International Conference on Lightning Protection, Estoril, Portugal, October, 2016.

A. Nag, M.J. Murphy, and J.A. Cramer, Update to the U.S. National Lightning Detection Network, 24th International Lightning Detection Conference & 6th International Lightning Meteorology Conference, 18-21 April, San Diego, California, USA, 2016.

J.D. Hill, C.T. Mata, W. Roeder, and A. Nag, Evaluation of the performance characteristics of MERLIN and NLDN based on two years of ground-truth data from Kennedy Space Center/Cape Canaveral Air Force, 24th International Lightning Detection Conference & 6th International Lightning Meteorology Conference, 18-21 April, San Diego, California, USA, 2016.

W. Schulz, A. Nag, and M.J. Murphy, Relationship between the average number of sensors reporting and the detection efficiency of a network, 24th International Lightning Detection Conference & 6th International Lightning Meteorology Conference, 18-21 April, San Diego, California, USA, 2016.

Y. Zhu, V.A. Rakov, M.D. Tran, and A. Nag, A study of NLDN responses to cloud discharge activity based on ground-truth data, Acquired at the LOG, 24th International Lightning Detection Conference & 6th International Lightning Meteorology Conference, 18-21 April, San Diego, California, USA, 2016.

D. Zhang, K.L. Cummins, A. Nag, and M. Murphy, Evaluation of the National Lightning Detection Network upgrade using the Lightning Imaging Sensor, 24th International Lightning Detection Conference & 6th International Lightning Meteorology Conference, 18-21 April, San Diego, California, USA, 2016.

A. Nag and M. J. Murphy, Overview of modern lightning locating systems, XIII International Symposium on Lightning Protection (SIPDA), Balneario Camboriu, Brazil, September, 2015.

A. Nag and V. A. Rakov, A unified engineering model of the first stroke in lightning, Ninth Asia-Pacific International Lightning Conference, paper 1236, Nagoya, Japan, June, 2015.

D. Zhang, K. L. Cummins, and A. Nag, Assessment of cloud lightning detection by the U.S. National Lightning Detection Network using video and Lightning Mapping Array observations, Seventh Conference on the Meteorological Applications of Lightning Data, paper 7.1, 95th American Meteorological Society Annual Meeting, Phoenix, Arizona, January, 2015.

M.J. Murphy and A. Nag, Cloud lightning performance and climatology of the U.S. based on the upgraded U.S. National Lightning Detection Network, Seventh Conference on the Meteorological Applications of Lightning Data, paper 8.4, 95th American Meteorological Society Annual Meeting, Phoenix, Arizona, January, 2015.

R.L. Holle, N.W.S Demetriades, and A. Nag, Airport lightning warnings with NLDN cloud and cloud-to-ground lightning data, Seventh Conference on the Meteorological Applications of Lightning Data, paper 2.4, 95th American Meteorological Society Annual Meeting, Phoenix, Arizona, January, 2015.

A. Nag, M. J. Murphy, W. Schulz, and K. L. Cummins, Lightning Locating Systems: Characteristics and validation techniques, 32nd International Conference on Lightning Protection, Shanghai, China, October, 2014.

R.L. Holle, N.W.S Demetriades, and A. Nag, Lightning warnings with NLDN cloud and cloud-to-ground lightning data, 32nd International Conference on Lightning Protection, Shanghai, China, October, 2014.

A. Nag, M. J. Murphy, and V. A. Rakov, Measurement of preliminary breakdown pulse trains in cloud-to-ground lightning using Lightning Locating Systems, 32nd International Conference on Lightning Protection, Shanghai, China, October, 2014.

A. Nag and V. A. Rakov, A transmission-line-type model for lightning return strokes with upward connecting leaders and branches, International Conference on Atmospheric Electricity, Norman, Oklahoma, June, 2014.

R.L. Holle, N.W.S Demetriades, and A. Nag, Lightning warning with NLDN cloud and cloud-to-ground lightning data, International Conference on Atmospheric Electricity, Norman, Oklahoma, June, 2014.

A. Nag, M. J. Murphy, K. L. Cummins, A. E. Pifer, and J. A. Cramer, Technology updates to the U.S. National Lightning Detection Network, IV Russian Conference on Lightning Protection, St. Petersburg, Russia, May, 2014.

A. Nag and V. A. Rakov, An engineering model for preliminary breakdown in cloud-to-ground lightning discharges, International Conference on Grounding and Earthing, 6th International Conference on Lightning Physics and Effects, Manaus, Brazil, May, 2014.

A. Nag, M. J. Murphy, K. L. Cummins, A. E. Pifer, and J. A. Cramer, Recent evolution of the U.S. National Lightning Detection Network, 23rd International Lightning Detection Conference & 5th International Lightning Meteorology Conference, ISBN 978-0-9894826-1-5, Tucson, Arizona, March, 2014.

A. Pessi and A. Nag, The impact of lightning data type and quality on radar proxy fields, 23rd International Lightning Detection Conference & 5th International Lightning Meteorology Conference, Tucson, Arizona, March, 2014.

R. K. Said and A. Nag, Method to improve location accuracy of GLD360, 23rd International Lightning Detection Conference & 5th International Lightning Meteorology Conference, Tucson, Arizona, March, 2014.

M. J. Murphy, A. Nag, J. A. Cramer, and A. E Pifer, Geolocation of multiple pulses in lightning pulse trains, 23rd International Lightning Detection Conference & 5th International Lightning Meteorology Conference, Tucson, Arizona, March, 2014.

K. L. Cummins and M. G. Quick, J. Myers, W. Rison, R. Thomas, P. Krehbiel, D. Rodeheffer, T.A. Warner, M.M.F. Saba and Carina Schumann, W. Lyons, G. McHarg, J. Engle, T. Samaras, P. Samaras, C. Young, A. Nag, J.A. Cramer, and T. Turner, S.A. Cummer and G. Lu, Overview of the Kansas windfarm 2013 field program, 23rd International Lightning Detection Conference & 5th International Lightning Meteorology Conference, Tucson, Arizona, March, 2014.

R.L. Holle, N.W.S Demetriades, and A. Nag, Lightning warning with NLDN cloud and cloud-to-ground lightning data, 23rd International Lightning Detection Conference & 5th International Lightning Meteorology Conference, Tucson, Arizona, March, 2014.

S. Mallick, V.A. Rakov, T. Ngin, W.R. Gamerota, J.T. Pilkey, J.D. Hill, M.A. Uman, D.M. Jordan, A. Nag, and R.K. Said, Calibration of the GLD360 against rocket-triggered lightning data, 23rd International Lightning Detection Conference & 5th International Lightning Meteorology Conference, Tucson, Arizona, March, 2014.

S. Mallick, V.A. Rakov, T. Ngin, W.R. Gamerota, J.T. Pilkey, J.D. Hill, M.A. Uman, D.M. Jordan, J.A. Cramer, and A. Nag, An update on the performance characteristics of the NLDN, 23rd International Lightning Detection Conference & 5th International Lightning Meteorology Conference, Tucson, Arizona, March, 2014.