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	original reduced grid (N48)	octahedral reduced grid (O48)	regular grid (F48)
Total number of grid points	13280	10944	18432
Resolution at equator (lat-lon)	1.875°	1.875°	1.875°
Resolution at equator (km)	210	210	210
Average resolution (km)	196	216	166

The lat-lon resolution at the equator is given by 90^o/N where N is the number of Gaussian latitudes between the pole and equator.
The resolution in kilometres at the equator is given by ~10000/N km (assuming a circumference of the earth of ~40000 km).
The average resolution is given by √(4 π R² / N_p) km, where R is the radius of the earth and N_p the total number of grid points.

CSV Table Export Macro

id	N48

latitude number	reduced points (original - N48)	reduced points (octahedral - O48)	regular points (full - F48)	latitude
1	20	20	192	88.572169
2	25	24	192	86.722531
3	36	28	192	84.861970
4	40	32	192	82.998942
5	45	36	192	81.134977
6	50	40	192	79.270559
7	60	44	192	77.405888
8	60	48	192	75.541061
9	72	52	192	73.676132
10	75	56	192	71.811132
11	80	60	192	69.946081
12	90	64	192	68.080991
13	96	68	192	66.215872
14	100	72	192	64.350730
15	108	76	192	62.485571
16	120	80	192	60.620396
17	120	84	192	58.755209
18	120	88	192	56.890013
19	128	92	192	55.024808
20	135	96	192	53.159595
21	144	100	192	51.294377
22	144	104	192	49.429154
23	160	108	192	47.563926
24	160	112	192	45.698694
25	160	116	192	43.833459
26	160	120	192	41.968220
27	160	124	192	40.102979
28	180	128	192	38.237736
29	180	132	192	36.372491
30	180	136	192	34.507243
31	180	140	192	32.641994
32	180	144	192	30.776744
33	192	148	192	28.911492
34	192	152	192	27.046239
35	192	156	192	25.180986
36	192	160	192	23.315731
37	192	164	192	21.450475
38	192	168	192	19.585219
39	192	172	192	17.719962
40	192	176	192	15.854704
41	192	180	192	13.989446
42	192	184	192	12.124187
43	192	188	192	10.258928
44	192	192	192	8.393669
45	192	196	192	6.528409
46	192	200	192	4.663150
47	192	204	192	2.797890
48	192	208	192	0.932630
49	192	208	192	-0.932630
50	192	204	192	-2.797890
51	192	200	192	-4.663150
52	192	196	192	-6.528409
53	192	192	192	-8.393669
54	192	188	192	-10.258928
55	192	184	192	-12.124187
56	192	180	192	-13.989446
57	192	176	192	-15.854704
58	192	172	192	-17.719962
59	192	168	192	-19.585219
60	192	164	192	-21.450475
61	192	160	192	-23.315731
62	192	156	192	-25.180986
63	192	152	192	-27.046239
64	192	148	192	-28.911492
65	180	144	192	-30.776744
66	180	140	192	-32.641994
67	180	136	192	-34.507243
68	180	132	192	-36.372491
69	180	128	192	-38.237736
70	160	124	192	-40.102979
71	160	120	192	-41.968220
72	160	116	192	-43.833459
73	160	112	192	-45.698694
74	160	108	192	-47.563926
75	144	104	192	-49.429154
76	144	100	192	-51.294377
77	135	96	192	-53.159595
78	128	92	192	-55.024808
79	120	88	192	-56.890013
80	120	84	192	-58.755209
81	120	80	192	-60.620396
82	108	76	192	-62.485571
83	100	72	192	-64.350730
84	96	68	192	-66.215872
85	90	64	192	-68.080991
86	80	60	192	-69.946081
87	75	56	192	-71.811132
88	72	52	192	-73.676132
89	60	48	192	-75.541061
90	60	44	192	-77.405888
91	50	40	192	-79.270559
92	45	36	192	-81.134977
93	40	32	192	-82.998942
94	36	28	192	-84.861970
95	25	24	192	-86.722531
96	20	20	192	-88.572169

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