1、238 _ ITU-R RECflN*PN- 837-1 94 4855212 0522390 911 = Rec. ITU-R PN.83 -1 i RECOMMENDATION ITU-R PN.837-1 CHARACTERISTICS OF PRECIPITATION FOR PROPAGATION MODELLING (Question ITU-R 201/3) (1992-1994) The ITU Radiocommunication Assembly, considering 4 scattering caused by precipitation; that informat
2、ion on the statistics of precipitation intensity is needed for the prediction of attenuation and b) that the information is needed for all locations on the globe; c) computer applications, that a digitized version of the rainfall climate zone maps has been prepared that may be valuable in some recom
3、mends 1. that Figs. 1 to 3 be used to select the rain climate region for the prediction of precipitation effects; 2. region; that Table 1 be used to obtain the expected median cumulative distribution of rain rate for the rain climate 3. that when the rain climate zone is required in computer applica
4、tions for any given set of geographic coordinates, the program RAINZONE be used. (The software for RAINZONE may be obtained from the ITU Radiocommunication Bureau.) I I 0.03 0.01 0.003 14 TABLE 1 Rain climatic zones Rainfall intensity exceeded (rnmlh) (Reference to Figs. 1 to 3) COPYRIGHT Internatio
5、nal Telecommunications Union/ITU RadiocommunicationsLicensed by Information Handling Services135 N A I 135 Rec. ITU-R PN.837-1 FIGURE 1 (See Table 1) 105O 45 239 15 60 30 105 7 5O 45O 15 COPYRIGHT International Telecommunications Union/ITU RadiocommunicationsLicensed by Information Handling Services
6、240 60 30 O 30 60 Rec. ITU-R PN.S37-1 450 15“ O 15 fl FIGURE 2 (See Table 1) 45 75O 105 4 5 4 5 7 5O 60“ 30 O 30 60 105 COPYRIGHT International Telecommunications Union/ITU RadiocommunicationsLicensed by Information Handling Services6 O“ r 5 d 60“ d fi 30 o“ , 60 3000 60“ Rec. ITU-R PN.837-1 9 0“ FIGURE 3 (See Table 1) 120 150“ 180“ I 1 A 90“ 120 15 150“ COPYRIGHT International Telecommunications Union/ITU RadiocommunicationsLicensed by Information Handling Services
