Ku-band Satellite Signal Propagation Experiments of Post-PARTNERS Project

KMITL has joined experiments with CRL Japan under Post-PARTNERS project by using JCSAT-3 satellite since 1997. The experiments are included satellite signal propagation, teleeducation, TV conference and so on. The experiments on satellite signal propagation are rain attenuation in Ku-band, carrier-to-noise ratio(C/N ratio) and bit error rate (BER) measurements. Thailand located in monsoon region, in rainy season the amount of rainfall has been observed about 1000 millimeter per month. The satellite-receiving signal was attenuated by rainfall. By our observation, the beacon signal level from JCSAT-3 was decreased about 3 dB/km at rain rate of 160 mm/hr. The measured value of C/N ratio at KMITL is lower than C/N at CRL about 2 dB. 2.The Experimental Configuration The experimental configuration of Ku-band satellite signal propagation at KMITL is shown in Table 1.