TELECOMMUNICATIONS AND RADIO ENGINEERING - 2012 Vol. 71,
No 5 		 

 

 

 

ON RELATIONSHIP BETWEEN EVAPORATION DUCT HEIGHT AND MICROWAVE ATTENUATION IN OVER-THE-HORIZON AREA


Yu.V. Levadnyi, V.Ê. Ivanov, & V.N. Shalyapin
A. Usikov Institute of Radio Physics and Electronics,
National Academy of Sciences of Ukraine
12, Academician Proskura St., Kharkiv 61085, Ukraine
Address all correspondence to Yu.V. Levadnyi E-mail: yulev@ire.kharkov.ua

Abstract
The analysis of the experimental data is carried out to find out the relationship between evaporation duct height defined on the basis of bulk meteorological measurements and attenuation of centimeter waves in over-the-horizon range. It is demonstrated that evaporation duct height reduction to three meters for small heights of evaporation ducts, to two meters for medium height and one meter for large-height ones increase accuracy of microwave propagation diagnostics. It is also confirmed that in tropical and subtropical areas of the Atlantic Ocean for low antenna heights an evaporation duct is one of the major propagation mechanisms for three-centimeter waves.
KEY WORDS: atmospheric duct, radio wave propagation, numerical methods

References

  1. Êukushkin, À.V., Freilicher, V.D., and Fucks, I.Ì., (1987), Over horizon propagation of ultra-short radio waves over the sea surface. (Review), Trans. Higher Education. Radio Physics. 30(7):811–848 (in Russian).
  2. Anderson, K., (1989), Radar measurements at 16.5 GHz in the oceanic evaporation duct, IEEE Trans. on Antennas and Propagation. 37(1):100–106.
  3. Hitney, H. and Vieth, R., (1990), Statistical assessment of evaporation duct propagation, IEEE Trans. on Antennas and Propagation. 38(6):794–799.
  4. Braude, S.Ya., Ivanov, V.Ê., Îstrovskyi, I.Ye., and Fucks, I.Ì., (1996), Propagation of ultra-short radio waves over the sea surface, Radio Physics and Radio Astronomy. 1(2):171–186 (in Russian).
  5. Belobrova, Ì.V., Ivanov, V.Ê., Êîshel, À.N. et al., (1996), Radiometeorological parameters determining the propagation conditions for radio microwaves over the ocean and the methods for their measurement, Radio Physics and Radio Astronomy. 1(2):187–193 (in Russian).
  6. Kulessa, A., Woods, G., Piper, B., and Heron, M., (1998), Line-of-sight EM propagation experiment at 10.25 GHz in the tropical ocean evaporation duct, IEE Proc. Microwaves, Antennas and Propagation. 145(1):65–69.
  7. Hitney, H.V., (1999), Evaporation duct propagation and near-grazing angle scattering from a rough sea, IGARSS '99 Proceedings. – Hamburg. – P. 2631–2633.
  8. Anderson, K.D. and Paulus, R.A., (2000), Rough Evaporation Duct (RED) Experiment, Proc. of the Battlespace Atmospherics and Cloud Impact on Military Operations Conference. Fort Collins.
    P. 1–11.
  9. Kerans, A., Kulessa, A., Woods, G., et al., (2002), A comparison of microwave propagation models and evaporation duct height estimation techniques with actual near water atmospheric and radio data taken in North Queensland, Australia in May 2001, Student Conference on Research and Development. Shah Alam. P. 120–125.
  10. Claverie, J. and Hurtaud, Y., (2004), Evaluating Model Predictions of Low-Level Microwave Propagation Over the Ocean, Battlespace Atmospheric and Cloud Impacts on Military Operations Conference (BACIMO 2004). Monterey. P. 1–10.
  11. Yue, P. and Yuanliang, M., (2006), Modeling evaporation duct effects on microwave propagation with experiment validation, 7th Intern. Symp. on Antennas, Propagation and EM Theory, ISAPE '06. Guilin. 2:483–486.
  12. Êostina, V.L., Ìytsenko, I.Ì., Royenko, À.N., and Khomenko, S.I., (2008), Investigation of ultrashort wave attenuation in the regions of the World Ocean, Telecommunications and radio Engineering. 67(18):1631-1643.
  13. Ìytsenko, I.Ì., (2008), Investigation of propagation of cm-band radio waves at availability of an evaporation duct, Radio Physics and Electronics. 13(2):173–177 (in Russian).
  14. Ivanov, V.Ê., Shalyapin, V.N., and Levadnyi, Yu.V., Determining of the evaporation duct height on the basis of bulk meteorological measurements, Trans. RAS. Physics of Atmosphere and Ocean. 43(1):42–51 (in Russian).
  15. Îstrovsky, I.Ye., (ed.) (1979), Òheoretical and experimental research of the conditions for propagation of radio waves in centimeter and decimeter wave band in the specified areas of the World Ocean, Scientific report on the research “Substation”, Kharkov: 284 p. (in Russian).
  16. Levy, M., (2000), Parabolic Equation Methods for Electromagnetic Wave Propagation, London: The Institution of Electrical Engineers. – 338 p.
  17. Dockery, D. and Kuttler, J., (1996), An improved impedance-boundary algorithm for Fourier split-step solutions of the parabolic wave equation, IEEE Trans. on Antennas and Propagation. 44(12):1592–1599.
  18. Miller, A.R., Brown, R.M., and Vegh, E., (1984), New derivation for the rough surface reflection coefficient and for the distribution of sea wave elevations, Proc. IEE. 131(2):114–116.


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