Research Article

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

Table 1

Parameter statistics of the icosahedral Snyder equal area aperture 4 hexagon (ISEA4H) grid (with a spherical radius of ).

Level Number of gridsGrid area (km2)Grid spacing (km)

012
142
2162
3642
42,562
510,242
640,962
7163,842
8655,362
92,621,442
1010,485,7627.879
1141,943,04212.1613.767
12167,772,1623.0401.884
13671,088,6420.7600.942
142,684,354,5620.1900.471
n

Note: represents the hexagonal grid level, and represents the average radius of the Earth.