Two-dimensional electromagnetic environment simulation based on digital map

To quickly predict the characteristic of the electromagnetic environment in two-dimensional terrain environment, this paper uses the two-dimensional parabolic equation model to simulate the electromagnetic environment. In order to get the real and effective terrain information, this paper studies the method to extract the grids terrain information from the GeoTiff, then uses the bilinear interpolation method to obtain the elevation value of the arbitrary location on the terrain profile. The calculation method of distance between two points on the Earths surface is also studied, and the results obtained by this method are compared with those obtained by the GIS software, which verifies the accuracy of the method. In the standard atmosphere condition, this paper uses the two-dimensional parabolic equation model to simulate and analyze the variation of the radio wave propagation factor with height in different distance and offers an efficient method to predict the characteristics of the wave propagation in the real terrain environment.