CLEAR SKY DIURNAL BEHAVIOR OF TROPOSPHERIC SCINTILLATION AT KU-BAND SATELLITE COMMUNICATION IN EQUATORIAL MALAYSIA
DOI:
https://doi.org/10.11113/jt.v77.6279Keywords:
Diurnal Variations, equatorial region, radiowave propagation, satellite communications, Tropospheric scintillationAbstract
Tropospheric scintillation is referred to rapid fluctuation of received signal amplitude. It can cause propagation impairments that affect satellite communication systems operating at above 10 GHz of frequency. In this work, we have exploited 1 year of measured broadcasting signal data collected in Johor, Malaysia to investigate the effects of scintillation intensity on a SatCom system operating at 11.075 GHz with its links pointed towards the MEASAT-1 satellite (an elevation angle of 75.61°). We have investigated the behavior of this scintillation amplitude through the classification and analysis of a time-series satellite broadcasting signal and have then compared the statistical results with existing scintillation prediction models. The comparison results indicate that there is a significant discrepancy between measured data and those models and that the performance of these prediction models does not appear to be satisfactory, with the exception of the ITU-R and the Ortgies Refractivity model. In addition, we have investigated the diurnal behavior of the scintillation intensity at four different periods of the day and proposed a modified Marzano model to accommodate local meteorological input parameters. The models performances are assessed against the available measurement dataset. The proposed models provide system operators and radio communication engineers with critical information on the fluctuations of tropospheric scintillation variance on the satellite signal during a typical day taken into the account of local meteorological peculiarities.
References
G. P. Pedro, J. M. Riera, and A. Benarroch. 2012. “Tropospheric Scintillation With Concurrent Rain Attenuation at 50 GHz in Madrid,†IEEE Trans. Antennas Propag. 60 (3) : 1578–1583.
Karasawa, Yoshio, Matsuichi Yamada, and Jeremy E. Allnutt. 1988. “A New Prediction Method for Tropospheric Scintillation on Earth-Space Paths,†IEEE Transactions on Antennas and Propagation. 36 (11): 1608-1614.
Otung, I.E., 1996. “Prediction Of Tropospheric Amplitude Scintillation On A Satellite Link†IEEE Transactions on Antennas and Propagation. 44(12): 1600-1608.
Propagation Data And Prediction Methods Required For The Design Of Earth-Space Telecommunication Systemsâ€. Recommendation ITU-R.P 618-10. 2009.
A. C. C. Y. J.S. Mandeep, M. Abdullah and M.Tariqul. 2011."Comparison and Analysis of Tropospheric Scintillation Models for Northern Malaysia," Acta Astronautica. 69 :2-5.
M.J.L. van de Kamp, C. Riva, J.K. Trevonen, and E.T. Solonen. 1999. “Frequency Dependence Of Amplitude Scintillation†IEEE Transactions on Antennas and Propagation. 47(1): 77-85.
H.Y. Lam, L. Luini, J. Din, C. Capsoni, A. D. Panagopoulos. “Investigation of Rain Attenuation in Equatorial Kuala Lumpurâ€. IEEE Antennas and Wireless Propagation Letters. 11 : 1002-1005.
A. Vander Vorst, D. Vanhoenacker, and L. Mercier. 1982. “Fluctuations On OTS-Earth Copolar Link Against Diurnal And Seasonal Variations,†Electron.Lett. 18 : 915–917.
I. E. Otung, M. S. Mahmoud, and J. R. Norbury. 1995. “Radiowave Amplitude Scintillation Intensity: Olympus Satellite Measurements And Empirical Model,†Electron. Lett. 31 : 1873–1875.
Ortgies G. 1985. Probability Density Function of Amplitude Scintillations. Electronics Letters. 21 (4): 141-142.
Jong, S. L., D’Amico, M., Din, L. and Lam, H. Y. 2014. Analysis of Fade Dynamic at Ku-band in Malaysia. International Journal of Antennas and Propagation: 1-7.
G. P. Pedro, J. M. Riera, and A. Benarroch. 2007. “Measurements Of Tropospheric Scintillation On Milimetre-Wave Satellite Link,†IET Electronics Letters. 43 (22).
S. I. E. Touw and M. H. A. J. Herben. 1996. “Short-Term Frequency Scaling Of Clear-Sky And Wet Amplitude Scintillation,†IEE Proc.-Microw. Antennas Propag. 143(6): 521–526.
F. S. Marzano and G. d’Auria. 1998. “Model-Based Prediction of Amplitude Scintillation Variance Due to Clear-Air Tropospheric Turbulence on Earth-Satellite Microwave Links,†IEEE Transactions on Antennas and Propagation. 46 (10).
O. P. Banjo and E. Vilar. 1987. “The Dependence Of Slant Path Amplitude Scintillations On Various Meteorological Parameters,†in Proc. 5th Int. Conf. Antennas Propagat. (ICAP’87), York, U.K : 277–280.
U. Merlo, E. Fionda, and J. Wang. 1987. “Ground Level Refractivity And Scintillation In Space-Earth Links,†Appl. Opt. 27: 2247–2252.
Downloads
Published
Issue
Section
License
Copyright of articles that appear in Jurnal Teknologi belongs exclusively to Penerbit Universiti Teknologi Malaysia (Penerbit UTM Press). This copyright covers the rights to reproduce the article, including reprints, electronic reproductions, or any other reproductions of similar nature.
