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24 lines
448 B
FortranFixed
24 lines
448 B
FortranFixed
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subroutine ps(dat,nfft,s)
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parameter (NMAX=16384+2)
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parameter (NHMAX=NMAX/2-1)
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real dat(nfft)
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real s(NHMAX)
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real x(NMAX)
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complex c(0:NHMAX)
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equivalence (x,c)
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nh=nfft/2
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do i=1,nfft
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x(i)=dat(i)/128.0 !### Why 128 ??
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enddo
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call xfft(x,nfft)
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fac=1.0/nfft
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do i=1,nh
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s(i)=fac*(real(c(i))**2 + imag(c(i))**2)
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enddo
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return
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end
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