Research and Construction of a Global Hexagonal Marine Gravity Gradient Reference Map for Navigation

Table 6

Statistics of the grid matching positioning error.

Track	Matching points	Grid	Resolution	Maximum (km)	Minimum (km)	Average (km)	Std (km)
1	519	Hexagon	11th level	4.5587	0.2973	2.0117	1.2539
		Quadrilateral	2	5.4560	0.2569	2.3741	1.5116
		Hexagon	12th level	3.9888	0.1045	1.5601	0.8121
		Quadrilateral	1	4.7149	0.1294	1.8855	1.0197
		Hexagon	13th level	2.4434	0.0345	0.9136	0.4129
		Quadrilateral	30	3.6127	0.0311	1.1382	0.5297
2	505	Hexagon	11th level	4.7454	0.3128	1.9120	1.3632
		Quadrilateral	2	5.6110	0.2812	2.2575	1.6521
		Hexagon	12th level	3.8101	0.1463	1.5581	0.9199
		Quadrilateral	1	4.3525	0.2130	1.9024	1.1242
		Hexagon	13th level	2.5012	0.1038	0.9004	0.4008
		Quadrilateral	30	3.5649	0.1249	1.1332	0.5041