TY  - JOUR
AU  - Tamošiūnaitė, M.
AU  - Tamošiūnas, S.
AU  - Daukšas, V.
AU  - Tamošiūnienė, M.
AU  - Žilinskas, M.
PY  - 2010/10/29
Y2  - 2025/01/02
TI  - Prediction of Electromagnetic Waves Attenuation due to Rain in the Localities of Lithuania
JF  - Elektronika ir Elektrotechnika
JA  - ELEKTRON ELEKTROTECH
VL  - 105
IS  - 9
SE  - 
DO  - 
UR  - https://eejournal.ktu.lt/index.php/elt/article/view/9159
SP  - 9-12
AB  - <p>The rain attenuation must be taken into account when new Telecommunication systems are projected. Attenuation due to rain depends on the rain rate. The rain rate values exceeded for 0.01% of the time obtained from the data of rainfall amount measured with one – minute intervals of the time must be used in calculation of rain attenuation. One – minute rain rate data are not always readily available from local weather agencies. Only the average annual, daily, hourly or ten – minutes precipitation amounts are available in many cases. The relations between the one – minute rain rate and the value obtained by using the rainfall amount data of longer duration may be used. The one – minute rain rate values in the localities of Lithuania were determined by using the rainfall amount values measured in the Lithuanian weather stations with ten – minutes integration time. They were compared with rain rate –value determined by using model presented in the previous paper and ITU – value. By using the values mentioned above and the known method the one – minute rain rate values were determined. The lowest values of rain rates were obtained in Klaipeda. Using the rain rate value obtained here and the ITU – value, the values of the specific rain attenuation have been determined. The specific rain attenuation values obtained using the local hydro meteorological data measured in Kaunas is by about 2 times higher than ones determined by using the ITU – rain rate – value.</p>
ER  -