Predicting Radio Wave Scattering Characteristics by the Environment around the Projectile

Abstract

In this study, we propose a method for predicting the characteristics of radio wave scattering based on the environment around the projectile transmitting information through a telemetry communication channel. Terrain and buildings are included in the integrated simulation model to analyze the wave propagation characteristics around the projectile. The propagation path between the projectile and control tower is investigated by observing both the direct and indirect paths. The simulation results show that the received power of the indirect path is 7.6−8 dB lower than that of the direct path, which indicates that the structures around the projectile have a greater effect on the received power than the terrain. To verify these results, the measurement equipment is placed at the Naro Space Center and the consequent path loss between the transmitter and receiver is measured. The received powers measured in reference to the transmitter position are between -77.3 dBm and -70.5 dBm (transmitted power of 20 dBm), which is in good agreement with the simulation data.