Amani Reddy

  • Research Assistant Professor
  • Institute of Northern Engineering
  • University of Alaska Fairbanks
  • PO Box 755910
  • Fairbanks, AK 99775-5910
  • Phone: (907) 474-6003
  • Office: ELIF 354
  • areddy1@alaska.edu
Research
Funded Research Projects
Publications
Education
Experience
Affiliations & Awards
  • Space weather
  • Satellite observations and numerical simulation studies of Earth’s upper atmosphere
  • Remote sensing/ radio sounding of the earth’s magnetosphere
  • Ground and Space-based very low frequency wave injection experiments

PI. Measurements of Electron Density and Density Irregularities at High Latitudes: Response to Geomagnetic Storms (2020). Funding Agency: Alaska NASA EPSCoR RID

Post doc. On the Propagation of 3-50 kHz signals transmitted from the Demonstration and Science Experiments (DSX) satellite to ground (2019). Funding Agency: Sandia labs

Graduate student & Post doc. Thermospheric wind and the evolution of the ionospheric and magnetospheric electron and ion densities at altitudes below 4000 km during geomagnetic storms (2014-2020). Funding Agency: NASA Living with star

Graduate student & Post doc. Whistler Mode Radio Sounding of Electrons, Ions and Density Irregularities in the Inner Magnetosphere from 90 to 5000 km (2013-2018). Funding Agency: NSF magnetospheric physics

Graduate student. Application of a new generation of ground and satellite based whistler mode eave experiments as diagnostic tools for probing the structure of magnetospheric plasmas (2008-2013). Funding Agency: Alaska NASA EPSCoR

Selected publications

  1. Reddy, A., V. S. Sonwalkar, and J. Huba (2018), Evolution of field-aligned electron and ion densities from whistler mode radio soundings during quiet to moderately active period and comparisons with SAMI2 simulations, J. Geophys. Res. space physics, doi: 10.1002/2017ja024348
  2. Reddy, A. and V. S. Sonwalkar (2017). Variation of plasmaspheric field-aligned electron and ion densities as a function of geomagnetic storm activity. 1-4. 10.23919/URSIGASS.2017.8105182.
  3. Sonwalkar, V., A. Reddy, S. Hazra (2014a), "Whistler mode radio sounding from IMAGE of field aligned electron and ion densities in the plasmasphere below 4000 km," General Assembly and Scientific Symposium (URSI GASS), 2014 XXXIth URSI , vol.,    no., pp.1,2, 16-23 Aug. 2014, doi: 10.1109/URSIGASS.2014.6929947
  4. Sonwalkar, V. S., Mayank, K., Reddy, A. (2014b), "Z mode radio sounding from IMAGE of field aligned electron density and ducts," General Assembly and Scientific          Symposium (URSI GASS), 2014 XXXIth URSI , vol., no., pp.1,3, 16-23 Aug. 2014, doi: 10.1109/URSIGASS.2014.6929854
  5. Sonwalkar, V. S., D. L. Carpenter, A. Reddy et al., (2011a), Magnetospherically reflected, specularly reflected, and backscattered whistler mode radio‐sounder echoes observed on the IMAGE satellite: 1. Observations and interpretation, J. Geophys. Res., 116.
  6. Sonwalkar, V. S., A. Reddy, and D. L. Carpenter (2011b), Magnetospherically reflected, specularly reflected, and backscattered whistler mode radio-sounder echoes observed on the IMAGE satellite: 2. Sounding of electron density, ion effective mass (meff), ion composition (H+, He+, O+), and density irregularities along the geomagnetic field line, J. Geophys. Res., 116, doi:10.1029/2011JA016760.
  7. V. S. Sonwalkar, Reddy, A. et al., "Whistler mode radio sounding from the RPI instrument on the IMAGE satellite," 2011 XXXth URSI General Assembly and Scientific Symposium, Istanbul, 2011, pp. 1-1. doi: 10.1109/URSIGASS.2011.6051106

Reports

Sonwalkar, V. S. and A. Reddy, On the Propagation of 3-50 kHz signals transmitted from the Demonstration and Science Experiments (DSX) satellite to ground, Final Report Submitted to Sandia National Laboratories, 06 December 2019.

Selected conference presentations (published abstracts)

  1. Reddy, A. and V. S. Sonwalkar (2019), Response of the Coupled Magnetosphere Ionosphere Outside the Plasmapause During the 24 August 2005 Major Storm, AGU Fall 2019 Meeting, 09-13 December, 2019, San Francisco, D. C.
  2. Sonwalkar, V. S, and Reddy, A.   (2019), VLF/LF Whistler Mode Wave Injection and Radio Sounding Experiments from the Demonstration and Science Experiments (DSX) Satellite, AGU Fall 2019 Meeting, 09-13 December, 2019, San Francisco, D. C.
  3. Reddy, A. and V. S. Sonwalkar (2018), Field-aligned Variations in Plasmaspheric Electron and Ion (H+, O+, He+) Densities during the 30 August 2005 Major Geomagnetic Storm: Role of Penetration Electric Fields and Thermospheric Neutral Winds and Composition, AGU Fall 2018 Meeting, 10-14 December, 2018, Washington, D. C.
  4. Sonwalkar, V. S, Reddy, A. and Butler, J. (2018b), Magnetosphere-Ionosphere-Thermosphere (MIT) Coupling via Lightning Generated Magnetospherically Reflected (MR) Nonducted Whistlers, AGU Fall 2018 Meeting, 10-14 December, 2018, Washington, D. C.
  5. Sonwalkar, V. S., A. Reddy, and B. Watkins (2018a), Proposed ELF/VLF wave injection experiments from an HF heating facility: generation of ELF/VLF waves and artificial ducts,     42nd COSPAR Scientific Assembly, 14 - 22 July 2018, Pasadena, CA, United States of America.
  6. Reddy, A. and V. S. Sonwalkar, (2017), Variation of Plasmaspheric Field-Aligned Electron and Ion Densities as a Function of Geomagnetic Storm Activity, XXXii URSI GASS 2017 Paper #1729, Montreal, Canada, August 19-26, 2017.
  7. Reddy, A., Sonwalkar, V. S., and J. D. Huba, Comparison of the Evolution of Quiet Time Field-aligned Electron and Ion Densities from Whistler Mode Radio Sounding with that from SAMI2 Simulations, AGU 2016 Fall Meeting, abstract #SA51C-04, 12-16 December, San Francisco, California, USA.
  8. Sonwalkar, V. S., A. Reddy, and B. Watkins, New Generation of ELF/VLF Wave Injection Experiments for HAARP, AGU 2016 Fall Meeting, abstract #AE22A-05, 12-16 December, San Francisco, California, USA (Invited).
  9. Reddy, A. and V. S. Sonwalkar, Variation of Plasmaspheric (90-4000 km) Field-aligned Electron Density and Ion Composition as a Function of Geomagnetic Storm Activity, AGU 2015 Fall Meeting, 14-18 December, San Francisco, California, USA, 2015 (Invited paper at the special session on "Dynamical Response of the Thermosphere and Ionosphere to Geomagnetic Disturbances").
  10. Sonwalkar, V. S., , T. Camden, and A. Reddy, IMAGE Observations of Sounder Stimulated and Naturally Occurring Fast Z mode Cavity Noise, AGU 2015 Fall Meeting, 14-18 December, San Francisco, California, USA, 2015.
  11. Sonwalkar, V. S., A. Reddy, and S. Hazra (2014a), Whistler Mode Radio Sounding from IMAGE of Field Aligned Electron and Ion Densities in the Plasmasphere below 4000 km, URSI GASS, Paper # 1812, August 16-23, 2014, Beijing, China. (Invited paper at the special session on "Remote sensing of the Plasmasphere")
  12. Sonwalkar, V. S., S. Hazra, K. Mayank, A. Reddy, Y. Liu, D. L. Carpenter (2013), Measurement of Field Aligned Electron and Ion Densities and Ducts from the Whistler and Z Mode Radio Sounding from IMAGE, AGU Fall 2013 Meeting, abstract # SM53A-2210, 9-13 December, San Francisco.
  13. Reddy, A., and V. S. Sonwalkar (2012), Electron and ion density variation below 4000 km along the L~2 flux tube as a function of geomagnetic activity: A study using whistler mode echoes observed by RPI/IMAGE, AGU Fall 2012 Meeting, 03-07 December, San Francisco, abstract # SM41A-2196.
  14. Sonwalkar, V. S., A. Reddy, S. Hazra, K. Mayank, D. L. Carpenter (2012), Whistler- and Z- Mode Radio Sounding of Electrons, Ions, Irregularities, Ducts And Cavities in the Magnetosphere, to be presented at 39th COSPAR Scientific Assembly, July 14-22, Mysore, India.
  15. Reddy, A., V. S. Sonwalkar (2011), Observations and Analysis of Whistler Mode Echoes during Quiet and Disturbed Periods: Measurement of the Electron Density and Ion Effective Mass as a Function of Geomagnetic Activity, AGU Fall Meeting, abstract # SM13D-2117, 05-09 December 2011d, San Francisco.
  16. Sonwalkar, V. S., K. Mayank, A. Reddy, S. Hazra, R. K.Proddaturi, D. L. Carpenter, B. W. Reinisch, Simultaneous Observations of Multi-mode Echoes on IMAGE: Propagation, Reflection, and Scattering of Whistler-, Slow Z-, Fast Z-, LO-, and RX-mode Waves at Low Altitude (<5,000 km), AGU Fall 2010 Meeting, 13-17 December 2010, San Francisco (American Geophysical Union, Fall Meeting 2010b, abstract # SM11B-1733.
  17. Sonwalkar, V. S., S. Hazra, K. Mayank, A. Reddy, D. L. Carpenter, B. W. Reinisch, Whistler Mode Echoes Observed Below 2,000 km Altitude by Radio Plasma Imager (RPI) on IMAGE: Radio Sounding of Electron Density and Ion Composition (H+, He+, O+), AGU Fall 2009 Meeting, 14-18 December 2009, San Francisco, abstract #SM44A-05.
  18. Sonwalkar, V. S., A. Reddy, D. L. Carpenter, B. Reinisch, Whistler Mode Sounding of the Magnetosphere: Measurement of Electron Density and Ion Composition (H+, He+, O+) Along the Geomagnetic Field , URSI GA 2008, 7-16 August, Chicago, USA, 2008.
  19. Reddy, A., V. S. Sonwalkar, D. L. Carpenter, B. Reinisch, Occurrence Pattern of Whistler Mode (WM) Echoes Observed by RPI/IMAGE as a function of Geomagnetic Activity, AGU 2007 Fall Meeting, abstract #SM33B-1341, 10-14 December, San Francisco, California, USA, 2007.
  20. Sonwalkar, V. S., D. L. Carpenter, R. Proddaturi, A. Reddy, B. Reinisch, Observations of Magnetospherically Reflected (MR) Whistler Mode (WM) Echoes Observed by Radio Plasma Imager (RPI) on the IMAGE Satellite: Diagnostics of Electron Density and Ion Composition, AGU 2006 Fall Meeting, abstract #SM11B-0323, 11-15 December, San Francisco, California, USA, 2006.
  • Postdoctoral fellow, Institute of Norther Engineering
    August 2015-May 2018
  • Doctor of Philosophy, Engineering: Electrical and Computer Engineering
    August 2015
    University of Alaska Fairbanks
  • Master of Science, Electrical and Computer Engineering
    December 2007
    University of Alaska Fairbanks
  • Bachelor of Technology Degree, Electronics and Communications Engineering
    May 2005
    Jawaharlal Technological University, INDIA

Appointments

2019-present: Research Assistant Professor, Institute of Northern Engineering, College of Engineering and Mines, UAF

2015-2019: Post-Doctoral Fellow, Institute of Northern Engineering, College of Engineering and Mines, UAF, Advisor: Prof. Vikas S Sonwalkar

Teaching Experience

Graduate Teaching Assistant, 2005, 2006, 2009, 2010
Department of Electrical and Computer Engineering, University of Alaska Fairbanks

Courses

  • EE 311 Engineering Electromagnetics I
  • EE 331 High frequency lab,
  • EE 333 Physical Electronics,
  • EE 334 Electronic Circuit Design,
  • EE 354 Engineering Signal Analysis
  • EE 461 Communication Systems, and
  • EE 464 Communication Networks Design.

Affiliations

  • American Geophysical Union

Honors and Awards

  • NASA EPSCoR Research initiation grant award
  • NASA EPSCoR TIM travel grant, summer 2019
  • Invited for Honor Society membership, 2017, 2018
  • Invited talk at AGU Fall Meeting 2015
  • Thesis completion fellowship for completing PhD thesis in the AY 2012-13 at UAF
  • ASUAF travel grant in Fall 2011
  • Geospace environment modeling (GEM) summer 2009 graduate student financial assistance
  • Graduate school fellowship for PhD program Spring 2008-Spring 2009 at UAF
  • Geospace environment modeling (GEM) summer 2008 graduate student financial assistance
  • Tau Beta Pi Engineering Honors Society, UAF, 2008 (declined by me)
  • Thesis completion fellowship for completing Master's thesis in Fall 2007 at UAF
  • UAF Graduate school travel grant for attending AGU Fall 2007 meeting