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//Chapter 25: Sky Wave Propagation
//Example 25-5.1
clc;
//Variable Initialization
muf = 10e6 //Maximum usable frequency (Hz)
h = 300 //Height of reflection (km)
n = 0.9 //Maximum value of refractive index (unitless)
//Calculations
Nmax = (1 - n**2)*(muf**2)/81 //Max. Number of electrons per cubic cm
fc = 9*sqrt(Nmax) //Critical frequency (Hz)
dskip = 2*h*sqrt((muf/fc)**2 - 1) //Skip distance (km)
//Result
mprintf("The skip distance is %.1f km",dskip)
//An error has been made in the calculation of sqrt((muf/fc)**2 - 1)
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