ANALISA DAN PERHITUNGAN REDAMAN HUJAN PADA LINK RADIO 2,4GHZ DENGAN ARAH LINK BERLAWANAN DENGAN ARAH ANGIN DI DAERAH MATARAM

Tropic area, such as the city of Mataram, generally has heavy rainfall which causes propagation attenuation affecting communication network system mainly on terrestrial radio link. Due to such a condition, it requires a design of network system that is reliable and also resistant to such a rain condition.Before designing, it is important to determine the characteristics and real circumstances on the area by means of capturing rainfall and rain attenuationdata. Rainfall is closely related to attenuation, because the higher the rainfall, the higher the attenuation occurs. The use of 2.4 GHz radio devices in Mataram is relatively very high, both as a backbone and local access. Therefore, it is necessary to obtain information concerning rain attenuation on the radio link with a frequency of 2.4 GHz in the city of Mataram to be used as means for designing terrestrial radio communication network system. Therecent study will carry out a rain attenuation measurement either by direct method or by SST (Synthetic Storm Technique) method on the 2.4 GHz radio link in the city of Mataram to provide a comparison of rain attenuation along the link considering wind direction and speed. 2.4 GHz radio link will be built on the campus of STMIK BumigoraMataram with 47.47 meterslink distance and its direction is opposite to the direction of the wind. Then, empirical rain attenuation measurementis carried out along the links and its result will be compared with the result of SSTcalculation on rain attenuation processed by Matlab, in which the data of the rainfall, wind speed, and its direction are obtained from BMKG Kediri Mataram