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git-svn-id: svn+ssh://svn.code.sf.net/p/wsjt/wsjt/branches/map65@334 ab8295b8-cf94-4d9e-aec4-7959e3be5d79
36 lines
611 B
Fortran
36 lines
611 B
Fortran
subroutine getsnr(x,nz,snr)
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real x(nz)
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smax=-1.e30
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do i=1,nz
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if(x(i).gt.smax) then
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ipk=i
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smax=x(i)
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endif
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s=s+x(i)
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enddo
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s=0.
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ns=0
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do i=1,nz
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if(abs(i-ipk).ge.3) then
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s=s+x(i)
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ns=ns+1
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endif
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enddo
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ave=s/ns
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sq=0.
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do i=1,nz
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if(abs(i-ipk).ge.3) then
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sq=sq+(x(i)-ave)**2
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ns=ns+1
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endif
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enddo
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rms=sqrt(sq/(nz-2))
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snr=(smax-ave)/rms
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return
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end
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