All Stories

  1. Extension of Hybrid Scintillation Propagation Model to the case of field propagation in the ionosphere with highly anisotropic irregularities

    Article • Radio Science, July 2017, Wiley

    Dr Vadim Gherm

  2. On the determination of the effect of horizontal ionospheric gradients on ranging errors in GNSS positioning

    Article • Journal of Geodesy, December 2016, Springer Science + Business Media

    Dr Vadim Gherm

  3. The techniques for modeling the effects of high-frequency wave field strong scintillations on the transionospheric paths of propagation

    Article • August 2016, Institute of Electrical & Electronics Engineers (IEEE)

    Dr Vadim Gherm

  4. On the distributions of scintillating transionospheric signals

    Article • May 2015, Institute of Electrical & Electronics Engineers (IEEE)

    Dr Vadim Gherm

  5. On the techniques for solving the problems of high-frequency wave field propagation in the inhomogeneous ionosphere with local variations of electron density

    Article • May 2015, Institute of Electrical & Electronics Engineers (IEEE)

    Dr Vadim Gherm

  6. Strong scintillation of GNSS signals in the inhomogeneous ionosphere: 2. Simulator of transionospheric channel

    Article • Radio Science, February 2015, American Geophysical Union (AGU)

    Dr Vadim Gherm

  7. Strong scintillation of GNSS signals in the inhomogeneous ionosphere: 1. Theoretical background

    Article • Radio Science, February 2015, American Geophysical Union (AGU)

    Dr Vadim Gherm

  8. Comparison of four methods for transionospheric scintillation evaluation

    Article • Radio Science, October 2014, American Geophysical Union (AGU)

    Dr Vadim Gherm

  9. On the contribution of horizontal gradients of the ionosphere into the errors of GNSS range-finding

    Article • August 2014, Institute of Electrical & Electronics Engineers (IEEE)

    Dr Vadim Gherm

  10. Recent advances in investigation of propagation of GNSS signals through the ionosphere with local random time-dependent inhomogeneities

    Article • August 2014, Institute of Electrical & Electronics Engineers (IEEE)

    Dr Vadim Gherm

  11. Further determinations of strong scintillation effects on GNSS signals using the Hybrid Scintillation Propagation Model

    Article • Radio Science, April 2012, American Geophysical Union (AGU)

    Dr Vadim Gherm

  12. Effects of diffraction by ionospheric electron density irregularities on the range error in GNSS dual-frequency positioning and phase decorrelation

    Article • Radio Science, June 2011, Wiley

    Dr Vadim Gherm

  13. On the effects of scintillation of low-latitude bubbles on transionospheric paths of propagation

    Article • Radio Science, February 2009, American Geophysical Union (AGU)

    Dr Vadim Gherm

  14. Modeling of scintillation effects on high-latitude transionospheric paths using ionospheric model (UAF EPPIM) for background electron density specifications

    Article • Radio Science, July 2008, American Geophysical Union (AGU)

    Dr Vadim Gherm

  15. Modeling and mitigation of the effect of scintillations on GPS

    Article • September 2007, Institute of Electrical & Electronics Engineers (IEEE)

    Dr Vadim Gherm

  16. Fast determination of phase advance, path delay and ray path curvature between satellites through a 3D ionosphere for L-band transmissions

    Article • January 2007, the Institution of Engineering and Technology (the IET)

    Dr Vadim Gherm

  17. Effect of scintillations on the correlation of different frequency L-band satellite navigation signals on the same transionospheric link

    Article • November 2006, Institute of Electrical & Electronics Engineers (IEEE)

    Dr Vadim Gherm

  18. Transionospheric simulator for strong scintillation conditions and its use in quantifying scintillation effects for GNSS systems

    Article • January 2006, the Institution of Engineering and Technology (the IET)

    Dr Vadim Gherm

  19. Propagation model for transionospheric fluctuating paths of propagation: Simulator of the transionospheric channel

    Article • Radio Science, January 2005, American Geophysical Union (AGU)

    Dr Vadim Gherm

  20. HF propagation in a wideband ionospheric fluctuating reflection channel: Physically based software simulator of the channel

    Article • Radio Science, January 2005, American Geophysical Union (AGU)

    Dr Vadim Gherm

  21. Quasi-classic approximation in Markov's parabolic equation for spaced position and frequency coherency

    Article • Radio Science, March 2003, American Geophysical Union (AGU)

    Dr Vadim Gherm

  22. Rate of phase change and fade depth on GPS paths due to ionospheric scintillation

    Article • January 2003, the Institution of Engineering and Technology (the IET)

    Dr Vadim Gherm

  23. Wideband HF simulator for multipath ionospherically reflected propagation channels

    Article • January 2003, the Institution of Engineering and Technology (the IET)

    Dr Vadim Gherm

  24. On the solution of Markov's parabolic equation for the second-order spaced frequency and position coherence function

    Article • Radio Science, August 2002, American Geophysical Union (AGU)

    Dr Vadim Gherm

  25. Propagation model for signal fluctuations on transionospheric radio links: Recent developments

    Article • Acta Geodaetica et Geophysica Hungarica, May 2002, Akademiai Kiado

    Dr Vadim Gherm

  26. Multipath effects in wideband fluctuating HF channels

    Article • Acta Geodaetica et Geophysica Hungarica, May 2002, Akademiai Kiado

    Dr Vadim Gherm

  27. Wideband scattering functions for HF ionospheric propagation channels

    Article • Journal of Atmospheric and Solar-Terrestrial Physics, September 2001, Elsevier

    Dr Vadim Gherm

  28. Effect of ionospheric scintillations on signal coherency over spaced paths for transionospheric propagation

    Article • January 2001, the Institution of Engineering and Technology (the IET)

    Dr Vadim Gherm

  29. Scattering functions for multimoded wideband HF channels

    Article • January 2001, the Institution of Engineering and Technology (the IET)

    Dr Vadim Gherm

  30. Propagation model for signal fluctuations on transionospheric radio links

    Article • Radio Science, September 2000, American Geophysical Union (AGU)

    Dr Vadim Gherm

  31. Scattering functions for wideband HF channels

    Article • January 2000, the Institution of Engineering and Technology (the IET)

    Dr Vadim Gherm

  32. Scattering function of the fluctuating ionosphere in the HF band

    Article • Radio Science, July 1998, Wiley

    Dr Vadim Gherm

  33. The two-frequency coherence function for the fluctuating ionosphere: narrowband pulse propagation

    Article • Journal of Atmospheric and Solar-Terrestrial Physics, September 1997, Elsevier

    Dr Vadim Gherm

  34. The two-frequency, two-time coherence function for the fluctuating ionosphere: wideband pulse propagation

    Article • Journal of Atmospheric and Solar-Terrestrial Physics, September 1997, Elsevier

    Dr Vadim Gherm

  35. Temperature dependence of the high-field electron transport characteristics in n-GaAs emitters

    Article • Semiconductor Science and Technology, June 1996, Institute of Physics Publishing

    Dr Vadim Gherm

  36. Fresnel filtering in HF ionospheric reflection channel

    Article • Radio Science, January 1995, American Geophysical Union (AGU)

    Dr Vadim Gherm

  37. The generalization of Rytov's method to the case of inhomogeneous media and HF propagation and scattering in the ionosphere

    Article • Radio Science, March 1992, American Geophysical Union (AGU)

    Dr Vadim Gherm

  38. Computer simulation of kinetic processes near a semiconductor surface at a high electric field using the particle method

    Article • Journal of Physics Condensed Matter, February 1992, Institute of Physics Publishing

    Dr Vadim Gherm

  39. Kinetic approach to field emission from semiconductors by computer simulation using particles

    Article • Journal of Physics Condensed Matter, February 1990, Institute of Physics Publishing

    Dr Vadim Gherm

  40. HF ionospheric reflection channel modeling for stochastically disturbed ionosphere

    Article • Institute of Electrical & Electronics Engineers (IEEE)

    Dr Vadim Gherm