Satellite Beacon Experiment for Studying Atmospheric Dynamics
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Satellite Beacon Experiment for Studying Atmospheric Dynamics J. S. Mandeep & Yun Yann Ng
Received: 1 September 2009 / Accepted: 19 May 2010 / Published online: 5 June 2010 # Springer Science+Business Media, LLC 2010
Abstract To estimate the circuit quality of radio communication systems and design transmission methods for them, the designers need to quantitatively establish the way in which radio waves are transmitted within the system. Analysis of beacon data from an experiment in Nibong Tebal, Engineering Campus of Universiti Sains Malaysia (Latitude: 5.17°N and Longitude: 100.4°E) has shown evidence of diurnal, seasonal and annual variations in clear sky level. One and a half year (January 2007–June 2008) beacon data have been taken to do the analysis. This study showed the evidence of atmospheric effects to the beacon measurement. Keywords Atmospheric effects . Satellite beacon . Ku-band
1 Introduction When designing a satellite link and considering it’s in the power budgets for on satellite links designing, an adequate signal level at the receiver’s demodulator must been provided to achieve the required level of performance and availability [1]. Although the length of atmosphere is much shorter than total propagation path, the communication quality can be degraded in different ways by slightly higher refractive index of atmosphere relative to that of vacuum space [2–4]. Therefore, losses due to the passages of the signal through the atmosphere have been considered in the development of an accurate link budget. A lot of care, therefore, goes into developing an accurate estimate of the likely impairments on any J. S. Mandeep Department of Electrical, Electronic & Systems Engineering, Faculty of Engineering & Built Environment, Universiti Kebangsaan Malaysia, 43600UKM, Bangi, Selangor Darul Ehsan, Malaysia e-mail: [email protected] Y. Y. Ng (*) School of Electrical and Electronic, Engineering Campus of Universiti Sains Malaysia, Seri Ampangan, 14300 Nibong Tebal, Seberang Perai Selatan, Pulau Pinang, Malaysia e-mail: [email protected] J. S. Mandeep Institute of Space Science, Faculty of Engineering & Built Environment, Universiti Kebangsaan Malaysia, 43600UKM, Bangi, Selangor Darul Ehsan, Malaysia
J Infrared Milli Terahz Waves (2010) 31:988–994
989
given link that would cause the performance and availability of the service to fall below acceptable levels [5–7]. One of the major problems affecting microwave and millimeter-wave bands satellite communication links are the attenuation through rain. Rain is the most important cause, not only due to the strong attenuation effect but also due to the fact that rain occurs most frequently. Since the majority of the studies on earth-to-space propagation have been done in temperate regions, the existing prediction models may not be satisfactorily accurate to characterize the effects of attenuation on tropical and equatorial climates [8]. In this paper, we study the atmospheric effects to the beacon measurement on Ku band satellite link in a tropical site. This stud
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