Table 1. r₀ and 〈 r c 2 〉 according to zenith angle under weak turbulence condition

Parameters	Symbols [unit]	Values
Zenith angle	ζ [°]	0	30	60
Fried parameter	r0 [cm]	19.34	17.74	12.76
RMS displacement	〈 r c 2 〉 [m]	2.34 (1.21”)	2.91 (1.30”)	6.63 (1.71”)

RMS, root-mean-square.