Longwall Retreat and Creep Measurement Based on UWB Radar Imaging Method

Table 2

The target azimuth and range errors before and after the advancing in the first simulation.

Height (m)		Azimuth (m)			Range (m)
		A	B	C	A	B	C
Before	0.15	0.024	0.004	0.010	0.022	0.002	0.009
	0.30	0.024	0.008	0.022	0.021	0.001	0.006
After	0.15	0.002	0.014	0.004	0.005	0.004	0.003
	0.30	0.004	0.010	0.008	0.006	0.001	0.004