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Table 1 Number of points, arcs, triangles, and average grid interval of the icosahedral grids

From: The Non-hydrostatic Icosahedral Atmospheric Model: description and development

  Points Arcs Triangles Average area Average interval
g-level N P N A N T A ¯ (km 2 ) Δ ¯ (km)
0 12 32 20 5,100,996.991 7,142.126
1 42 122 80 1,275,249.248 3,571.063
2 162 482 320 318,812.312 1,785.532
3 642 1,922 1,280 79,703.078 892.766
4 2,562 7,682 5,120 19,925.769 446.383
5 10,242 30,722 20,480 4,981.442 223.191
6 40,962 122,882 81,920 1,245.361 111.596
7 163,842 491,522 327,680 311.340 55.798
8 655,362 1,966,082 1,310,720 77.835 27.899
9 2,621,442 7,864,322 5,242,880 19.459 13.949
10 10,485,762 31,457,282 20,971,520 4.865 6.975
11 41,943,042 125,829,122 83,886,080 1.216 3.487
12 167,772,162 503,316,482 335,544,320 0.304 1.744
13 671,088,642 2,013,265,922 1,342,177,280 0.076 0.872
14 2,684,354,562 8,053,063,682 5,368,709,120 0.019 0.436
  1. The g-level is the grid division level. Here, R = 6371.22 km.