PIER M
 
Progress In Electromagnetics Research M
ISSN: 1937-8726
Home | Search | Notification | Authors | Submission | PIERS Home | EM Academy
Home > Vol. 92 > pp. 181-192

ESTIMATION AND ANALYSIS OF THE RADIO REFRACTIVITY, ITS GRADIENT AND THE GEOCLIMATIC FACTOR IN ARCTIC REGIONS

By Y. Bettouche, B. Agba, A. B. Kouki, H. Obeidat, A. Alabdullah, F. Abdussalam, S. Ghauri, and R. A. Abd-Alhameed

Full Article PDF (747 KB)

Abstract:
In this paper, local meteorological data of one year have been used to calculate the surface atmospheric radio refractivity (N) and estimate the vertical refractivity gradient (dN1) as well as the geoclimatic factor (K) in the lowest atmospheric layer above the ground surface in the station Kuujjuaq (Quebec, Canada). In this region, the climate is arctic, characterized by very long and very cold winters (on average the temperature is below -20˚C for almost 240 days per year). The precipitations are almost nonexistent, and the vegetation is scarce. Average daily, monthly, seasonal, and yearly variations of the N, dN1, and K are estimated and analysed. The obtained values of these indices are compared to the corresponding values provided by the ITU. The results show that the more negative values of dN1 lie in the summer season. This is mainly due to the important variations of the temperature and humidity during this season. However, the estimated values lie in the limits mostly corresponding to standard refraction.

Citation:
Y. Bettouche, B. Agba, A. B. Kouki, H. Obeidat, A. Alabdullah, F. Abdussalam, S. Ghauri, and R. A. Abd-Alhameed, "Estimation and Analysis of the Radio Refractivity, its Gradient and the Geoclimatic Factor in Arctic Regions," Progress In Electromagnetics Research M, Vol. 92, 181-192, 2020.
doi:10.2528/PIERM20020709

References:
1. Grabner, M., et al., "Multipath fading measurement and prediction on 10 GHz fixed terrestrial link," 15th Conference on Microwave Techniques COMITE 2010, 145-148, IEEE, 2010.
doi:10.1109/COMITE.2010.5481330

2. Bogucki, J. and E. Wielowieyska, "Empirical season's fadings in radio communication at 6 GHz band," Journal of Telecommunications and Information Technology, 48-52, 2009.

3. Adediji, A., et al., "Radio refractivity measurement at 150 m altitude on TV tower in Akure, South West Nigeria," Journal of Engineering and Applied Sciences, Vol. 2, No. 8, 1308-1313, 2007.

4. Grabner, M., et al., "Parameters of vertical profiles of temperature humidity and refractive index of air in the lowest troposphere," Proc. of 9th International Symposium on Tropospheric Profiling (ISTP), 2012.

5. Priestley, J. and R. Hill, "Measuring high-frequency humidity, temperature and radio refractive index in the surface layer," Journal of Atmospheric and Oceanic Technology, Vol. 2, No. 2, 233-251, 1985.
doi:10.1175/1520-0426(1985)002<0233:MHFHTA>2.0.CO;2

6. Kablak, N., "Refractive index and atmospheric correction to the distance to the Earth's artificial satellites," Kinematics and Physics of Celestial Bodies, Vol. 23, No. 2, 84-88, 2007.
doi:10.3103/S0884591307020079

7. Union, I. T., "Propagation data and prediction methods required for the design of terrestrial line-of-sight systems," Recommendation of ITU-R, 530-15, Geneva, 2015.

8. Norland, R., "Temporal variation of the refractive index in coastal waters," 2006 International Radar Symposium, 1-4, IEEE, 2006.

9. Boumis, M., D. Rezacova, and Z. Sokol, "Calculation of vertical gradient of atmospheric refractivity making use of 3D objective analysis technique," Electronics Letters, Vol. 35, No. 18, 1583-1584, 1999.
doi:10.1049/el:19991089

10. Grabner, M. and V. Kvicera, "Clear-air propagation modeling using parabolic equation method," Radioengineering-Prague, Vol. 12, No. 4, 50-54, 2003.

11. Ali, S., et al., "Statistical estimation of tropospheric radio refractivity derived from 10 years meteorological data," Journal of Atmospheric and Solar-Terrestrial Physics, Vol. 77, 96-103, 2012.
doi:10.1016/j.jastp.2011.12.001

12. ITU, "ITU-R P.453-11: The radio refractive index: Its formula and refractivity data," ITU-R, Geneva, 2015.

13. Brussaard, G., "Handbook on radiometeorology," International Telecommunication Union, Geneva, 1996.

14. Canada, G. O., "Données climatiques historiques,", February 09, 2019, Available from: http://climat.meteo.gc.ca/.

15. ITU, "Reference standard atmospheres," Recommendation of ITU-R, 835-6, Geneva, 2017.

16. Liebe, H. J., "A contribution to modeling atmospheric millimeter-wave properties," Frequenz, Vol. 41, No. 1-2, 31-36, 1987.
doi:10.1515/FREQ.1987.41.1-2.31

17. Johnsnhweather, "Vapor pressure,", October 09, 2019, Available from: http://www.johnsnhweather.com/formulas/vaporPressure.html.

18. Zilinskas, M., M. Tamosiunaite, M. Tamosiuniene, E. Valma, and S. Tamosiunas, "Gradient of radio refractivity in troposphere," PIERS Proceedings, 603-607, Moscow, Russia, August 19-23, 2012.

19. Turton, J., D. Bennetts, and S. Farmer, "An introduction to radio ducting," Meteorological Magazine, Vol. 117, 245-254, 1393, 1988.

20. AbouAlmal, A., et al., "Statistical analysis of refractivity gradient and β0 parameter in the gulf region," IEEE Transactions on Antennas and Propagation, Vol. 61, No. 12, 6250-6254, 2013.
doi:10.1109/TAP.2013.2279999


© Copyright 2010 EMW Publishing. All Rights Reserved