Effect of Radar-Drone Elevation Stability on Estimation Soil Water

The implementation of radar-drone for soil water content (SWC) data mapping in plantation areas found the plant height variations that caused the fluctuation in radar drones elevation. The stability of the radar-drone elevation is needed to ensure the SWC estimation results from the radar have good accuracy. The drone's altitude control system proposes pre- processing of Lidar data to overcome this problem. The Autoregressive Moving Average (ARMA) structure was studied and proposed as a Lidar data pre-processing method for generating the drone flight controller input. Simulation studies and experiments on tea plantations have been carried out. The results obtained indicate that the proposed method can improve the accuracy of the SWC estimation of the radar-drone system.