Modeling of electromagnetic environment and radiation distribution analysis for aircraft approaching and landing

Electromagnetic field, terrain and obstacle are three vital elements which constitute electromagnetic environment in aerodrome terminal. Because of their inhomogeneity in topology, physics and semanteme, it is difficult to express the characteristic of the electromagnetic environment for aircraft approaching and landing with determined model. Based on the attribute of hierarchy and the coupling interrelation of those three elements, a multi-layer fused electromagnetic environment model frame for aerodrome terminal was put forward. In order to reduce the computation error induced by the non-regulation boundary variation of electromagnetic field, a combination of method of moment(MoM) and ray tracing methods was used to simulate the radiation pattern and wave propagation, and radiation intensity expression and distribution computation flow in approaching and landing area were described. Simulation experiment of the radiation computation in approaching area based on one aerodrome dataset shows the validity of the modeling method.