Gherm Vadim (Eduardovich), PhD, associate professor russian

Ph.D. in Physics and Mathematics, associate professor of the Department of Radio Physics of the University of St. Petersburg. Born in 1958 in Estonian Republic (USSR), graduated from the Faculty of Physics of Leningrad State University (1980), PhD in Physics and Mathematics (1986). Scientific interests lie in the field of the numerical modelling of physical processes, analytical and numerical methods in the problems of wave propagation in the deterministic and stochastic media, in particular, HF, VHF and UHF propagation in the disturbed ionosphere, characterization of the ionospheric and transionospheric propagation channels, satellite navigation systems (GPS, GLONASS, Galileo).

The author of 145 scientific publications, co-investigator in many projects funded from the state budget, as well as by the grants of Soros (International Science Foundation), Russian Foundation for Basics Research, Ministry for Education of Russia, CRDF of USA, EPSRC of the UK, etc. Worked at the University of Leeds, UK as the Research Fellow in 1999, 2001-02 and 2006-07. Also worked as the Visiting researcher at the University of Newcastle, UK in 2010. Undertook scientific visits to the Universities and other scientific institutions of Sweden, Italy, France, and Great Britain. Participated from the University of St. Petersburg at the EC COST Actions 251, 271 and 296. Participated at many Soviet, Russian and international conferences, in particular, as the invited presenter.

E-mail: v.germ@spbu.ru, ghermspb@gmail.com

Lectures currently being given:

1. Electromagnetic waves propagation in plasma.

2. Plasma electrodynamics.

Selected publications:

1.

V.E.Gherm, N.N.Zernov, Fresnel filtering in HF ionospheric reflection channel, Radio Science, 30, 1, 127-134, 1995.

2.

V.E.Gherm, N.N.Zernov, B.Lundborg, A.Vastberg, The two-frequency coherence function for the fluctuating ionosphere; narrowband pulse propagation, Journal of Atmospheric and Solar-Terrestrial Physics, 59, 1831-1841, 1997.

3.

V.E.Gherm, N.N.Zernov, B.Lundborg, The two-frequency, two-time coherence function for the fluctuating ionosphere; wideband pulse propagation, Journal of Atmospheric and Solar-Terrestrial Physics, 59, 1843-1854, 1997.

4.

V.E.Gherm, N.N.Zernov, Scattering function of the fluctuating ionosphere in the HF band, Radio Science, 33, 1019-1033, 1998.

5.

V.E.Gherm, N.N.Zernov, S.M.Radicella, H.J.Strangeways, Propagation model for signal fluctuations on transionospheric radiolinks, Radio Science, 35, 5, 1221-1232, 2000.

6.

V.Gherm, N.Zernov, B.Lundborg, M.Darnell, H. Strangeways. Wideband scttering functions for HF ionospheric propagation channels. Journal of Atmospheric and Solar-Terrestrial Physics, 63, 1489-1497, 32-38, 2001.

7.

V.Gherm, N.Zernov, B.Lundborg, M.Darnell, H. Strangeways. Wideband scttering functions for HF ionospheric propagation channels. Journal of Atmospheric and Solar-Terrestrial Physics, 63, 1489-1497, 32-38, 2001.

8.

A.A.Bitjukov, V.E.Gherm, N.N.Zernov. Quasi-classic approximation in Markovs parabolic 5equation for spaced position and frequency coherency. Radio Science, 38 2, 10.1029/2002RS002714, 28 March, 2003.

9.

V.E.Gherm, N.N.Zernov, H.J.Strangeways. Investigation into the problem of characterization of the HF ionospheric fluctuating channel of propagation: construction of a physically based HF channel simulator. Annals of Geophysics, supplement to v. 47, 2/3, 1121-1130, 2004.

10.

Y.Beniguel, B.Forte, S.M.Radicella, H.J.Strangeways, V.E.Gherm, N.N.Zernov. Scintillations effects on satellite to earth links for telecommunication and navigation purposes. Annals of Geophysics, supplement to v. 47, 2/3, 1179-1199, 2004.

11.

V.E.Gherm, N.N.Zernov, H. J. Strangeways. HF Propagation in a Wideband Ionospheric Fluctuating Reflection Channel: Physically Based Software Simulator of the Channel. Radio Science, 40(1), RS1001, doi:10.1029/2004RS003093, 2005.

12.

V.E.Gherm, N.N.Zernov, H.J.Strangeways. Propagation Model for Transionospheric Fluctuational Paths of Propagation: Simulator of the Transionospheric Channel. Radio Science, 40(1), RS1003, doi: 10.1029/2004RS003097, 2005.

13.

Maurits, S. A., V. E. Gherm, N. N. Zernov, and H. J. Strangeways (2008), Modeling of scintillation effects on high-latitude transionospheric paths using ionospheric model (UAF EPPIM) for background electron density specifications, Radio Science, 43, RS4001, doi:10.1029/2006RS003539.

14.

Zernov, N. N., V. E. Gherm, and H. J. Strangeways (2009), On the effects of scintillation of low-latitude bubbles on transionospheric paths of propagation, Radio Science, 44, RS0A14, doi:10.1029/2008RS004074.

15.

Sandro M. Radicella, Petra  Sauli, Norbert Jakowski, Daniel Kouba, Anna Portillo, Miguel Herraiz, Hal J. Strangeways, Nikolay Zernov and Vadim Gherm, (2009), Space Plasma Effects, Annals of Geophysics, Special Issue: Final Report of the COST296 Action Mitigation of Ionospheric Effects on Radio Systems, v. 52, No. 3-4, 359-372.

16.

Yannick Beniguel, Vincenzo Romano, Lucilla Alfonsi, Marcio Aquino, Alain Bourdillon A, Paul Cannon, Giorgianna De Franceschi, Smita Dubey, Biagio Forte, Vadim Gherm, Norbert Jakowski, Massimo Materassi, Thoralf  Noack, Mariusz Pozoga, Niel Roger, Paolo Spala, Hal J. Strangeways, E. Michael Warrington, Andrzey Wernik, Volkner  Wilken and Nikolay Zernov, (2009), Ionospheric scintillation monitoring and modeling, Annals of Geophysics, Special Issue: Final Report of the COST296 Action Mitigation of Ionospheric Effects on Radio Systems, v. 52, 3-4, 391-416.

17.

Gherm, V. E., N. N. Zernov, and H. J. Strangeways, (2011), Effects of diffraction by ionospheric electron density irregularities on the range error in GNSS dual-frequency positioning and phase decorrelation, Radio Science, 46, RS3002, doi:10.1029/2010RS004624.

18.

Zernov, N.N., V.E.Gherm, and H.J.Strangeways, (2012), Further determination of strong scintillation effects on GNSS signals using the Hybrid Scintillation Propagation Model, Radio Science, 47, 2011RS004935R.

19.

Strangeways, H. J., N. N. Zernov, and V. E. Gherm, (2014), Comparison of four methods for transionospheric scintillation evaluation, Radio Science, 49, 899909, doi:10.1002/2014RS005408.

20

Zernov, N.N., and V.E.Gherm, (2015), Strong Scintillation of GNSS Signals in the Inhomogeneous Ionosphere. 1: Theoretical Background,Radio Science, Volume 50, Issue 2, February 2015, Pages 153 167. First published 25 February, 2015. 10.1002/2014RS005603.

21.

Gherm, V.E., and N.N. Zernov, (2015), Strong Scintillation of GNSS Signals in the Inhomogeneous Ionosphere. 2: Simulator of Transionospheric Channel, Radio Science, Volume 50, Issue 2, February 2015, Pages 168 176. First published 25 February, 2015.10.1002/2014RS005604