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//Chapter 6, Example 6.4, page 233
clc
//Initialisation
f=150*10**6 //frequency in Hz
c1=3*10**8 //speed of light
h11=60 //in metre
d11=2000 //in metre
d1=259.6 //in metre
b=2000 //in metre
a=250 //in metre
h21=80 //in metre
d21=7259 //in metre
c=7250 //in metre
//Calculation
h=c1*f**-1 //wavelength
v1=h11*sqrt((2*(h*d1)**-1)+(1*d11**-1))
L1=6.9+20*log10(sqrt((v1-0.1)**2+1)+v1-0.1) //path diffraction loss
v2=h21*sqrt((2*(h*d11)**-1)+(1*d21**-1))
L2=6.9+20*log10(sqrt((v2-0.1)**2+1)+v2-0.1) //path diffraction loss
//Results
printf("Diffraction loss L1 = %.2f dB",L1)
printf("\n L2 = %.2f dB",L2)
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