6; λ= 97.3,103,122,486,656,1880 nm
(4-3, 3-1, 2-1, 4-2, 3-2, 4-1)
4 - 3, 4 - 2, 4 - 1, 3 - 2, 3 - 1, 2 - 1,
(where n=1 at ground, n=2 at 1st station, n=3 at 3rd station, etc.)
Ground E1= 13.6(1-1/1^2) = 0
1st station E2= 13.6(1-1/2^2) = 10.2
2nd station E3= 13.6(1-1/3^2) = 12.1 (12.0889)
3rd station E4= 13.6(1-1/4^2 = 12.8 (12.75)
4th station E5= 13.6(1-1/5^2) = 13.1 (13.056)
5th station E6= 13.6(1-1/6^2) = 13.2
4 - 3 91.18nm/(1/1^2-1/4^2) = 1880 (1875.7)
4 - 2 91.18nm/(1/2^2-1/4^2) = 486 (486.293)
4 - 1 91.18nm/(1/3^2-1/4^2) = 97.3 (97.25)
3 - 2 91.18nm/(1/2^2-1/3^2) = 656 (656.496)
3 - 1 91.18nm/(1/1^2-1/3^2) = 103 (102.578)
2 - 1 91.18nm/(1/1^2-1/2^2) = 122 (121.573)