Fig. 7

Height observations by the ultrasonic sensor and the LL2 sensor of two plots. The red circles indicate the ultrasonic sensor measurements, while the blue squares indicate the LL2 sensor measurements. The solid pink and black lines indicate the averaged top 5% observations by the ultrasonic sensor and the LIDAR-Lite v2 sensor, respectively. The dashed green line shows the manual (ground truth) observation. The vertical yellow lines mark the start and end of the plot. The X-axis in each panel indicate the northing coordinates in meters in the Universal Transverse Mercator (UTM) 14 N coordinate system. The Y-axis in each panel indicate the distance measurements in meters