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https://github.com/saitohirga/WSJT-X.git
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ed91a35847
applicable, JT65v2 otherwise. Thanks to DL9RDZ! 2. Fix a bug in flat3.f90, evident on OSX systems. Thanks to G4KLA! 3. The Makefile now copy the jt9code executable into the destination directory for to-be-packaged executables. git-svn-id: svn+ssh://svn.code.sf.net/p/wsjt/wsjt/branches/wsjtx@3648 ab8295b8-cf94-4d9e-aec4-7959e3be5d79
75 lines
1.4 KiB
Fortran
75 lines
1.4 KiB
Fortran
subroutine flat3(s0,iz,nfa,nfb,nterms,ynoise,s)
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implicit real*8 (a-h,o-z)
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parameter (NSMAX=6827)
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real*4 s0(iz)
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real*4 s(iz)
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real*4 ynoise,y4,db
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real*8 x(NSMAX)
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real*8 y(NSMAX)
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real*8 y0(NSMAX)
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real*8 yfit(NSMAX)
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real*8 a(10)
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integer ii(NSMAX)
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npts0=999999
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df=12000.0/16384.0
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do i=1,iz
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y0(i)=db(s0(i))
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enddo
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ia=(nfa+200.0)/df
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ib=5000.0/df
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if(nfb.gt.0) ib=nfb/df
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j=0
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do i=ia,ib
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j=j+1
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x(j)=i*df
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y(j)=y0(i)
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ii(j)=i
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enddo
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npts=j
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mode=0
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a=0.0
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do iter=1,99
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call polfit(x,y,y,npts,nterms,mode,a,chisqr)
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do i=1,ib
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f=i*df
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yfit(i)=a(nterms)
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do n=nterms-1,1,-1
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yfit(i)=f*yfit(i) + a(n)
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enddo
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! write(21,1010) f,y0(i),yfit(i),y0(i)-yfit(i)
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!1010 format(4f12.3)
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enddo
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k=0
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do j=1,npts
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y1=y(j)-yfit(ii(j))
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if(y1.lt.ynoise) then
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! if(y1.lt.ynoise .and. y1.gt.-ynoise) then
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k=k+1
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x(k)=x(j)
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y(k)=y(j)
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ii(k)=ii(j)
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endif
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enddo
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npts=k
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if(npts.eq.npts0 .or. npts.lt.(ib-ia)/10) exit
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npts0=npts
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enddo
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! do j=1,npts
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! write(22,1010) x(j),y(j),yfit(ii(j)),y(j)-yfit(ii(j))
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! enddo
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do i=1,ib
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y4=y0(i)-yfit(i) - 10.0
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s(i)=10.0**(0.1*y4)
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enddo
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end subroutine flat3
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