Table 1. Comparison of tracking efficiencies and position RMSEs of Tag 1 among five solver groups in stationary point tests in the forebay at 10 m, 20 m, 50 m and 100 m away from the dam face.

Distance to Dam	Bucher - 4	Exact - 4	AML - 4	Exact - All	AML - All
			Tracking Efficiency (%)
10 m	76.40	81.34	81.48	92.04	99.99
20 m	94.98	90.22	90.55	94.66	100.00
50 m	93.10	88.39	90.16	98.41	100.00
100 m	86.62	80.14	81.71	98.80	99.58
			Distance RMS Error (Unit: m)
10 m	4.08	4.65	4.74	3.44	0.42
20 m	5.42	3.99	4.25	4.57	0.48
50 m	7.83	4.94	3.92	1.98	0.82
100 m	4.27	1.39	1.40	1.14	0.65
			X RMS Error (Unit: m)
10 m	1.19	1.64	1.67	2.30	0.13
20 m	1.42	1.01	1.06	1.83	0.18
50 m	2.84	1.57	1.13	1.50	0.21
100 m	1.72	0.64	0.63	0.97	0.34
			Y RMS Error (Unit: m)
10 m	1.42	1.40	1.39	1.54	0.29
20 m	1.09	1.15	1.15	3.14	0.26
50 m	0.45	0.36	0.34	0.86	0.31
100 m	0.36	0.33	0.33	0.26	0.25
			Z RMS Error (Unit: m)
10 m	3.63	4.12	4.21	2.04	0.27
20 m	5.12	3.69	3.95	2.77	0.36
50 m	7.29	4.67	3.74	0.96	0.73
100 m	3.89	1.19	1.21	0.55	0.49