Applicability of ITU-R P.1546 recommendation in typical terrestrial areas of CHINA

Based on the analysis of the ITU-R P.1546 recommendation, this paper compares the prediction results with the test results in the surrounding plain area of Beijing and Karst mountain area in Guizhou, and we analyzed the applicability of this method in two typical terrestrial areas of China. The results show that:(1) The terrain shows good adaptability at both 3 s and 30 s accuracy, and increasing the elevation accuracy can reduce the prediction error. (2) The prediction result of remote mountainous regions is only good at 3 s terrain accuracy. Coarse-grained elevation data can have a significant impact on the equivalent height of transmit antenna, as well as the field strength interpolation and the terrain clearance angle correction, and the average value of terrain clearance angle correction under 3 s and 30 s Terrain difference is 30.85 dB. The research results are of significance to for the regional application and localization research of the propagation prediction methods provided by ITU-R Recommendations.