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//Variable Declaration
CNR=17.4 //Clear sky input C/N (dB)
T=10 //Threshold level for FM etector(dB)
Ta=272 //Value of Ta(Kelvin)
Tscs=544 //Value of Tscs(Kelvin)
//Calculation
TM=CNR-T //Threshold margin at FM detector(dB)
CNR=10**(CNR/10) //Converting CNR to ratio
NCR=1/CNR
function [y]=f(A)
y=0.1-NCR*(A+(A-1)*Ta/Tscs)
endfunction
A=fsolve(2,f)
A=10*log10(A) //Converting A into decibels
A=round(A)
// Getting the value of probablity of exceeding A from the curve
if (A==6) then
P=2.5*10**-4
else
printf("error")
end
Av=100*(1-P) //Availability(percentage)
//Result
printf("The time system stays above threshold is %.3f percentage",Av)
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