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git-svn-id: svn+ssh://svn.code.sf.net/p/wsjt/wsjt/branches/wsjtx@3271 ab8295b8-cf94-4d9e-aec4-7959e3be5d79
49 lines
1.2 KiB
Fortran
49 lines
1.2 KiB
Fortran
subroutine sync9(ss,nzhsym,lag1,lag2,ia,ib,ccfred,ipkbest)
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parameter (NSMAX=22000) !Max length of saved spectra
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real ss(184,NSMAX)
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real ss1(184)
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real ccfred(NSMAX)
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include 'jt9sync.f90'
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ipk=0
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ipkbest=0
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sbest=0.
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ccfred=0.
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do i=ia,ib !Loop over freq range
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ss1=ss(1:184,i)
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call pctile(ss1,nzhsym,40,xmed)
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! xmed=sum(ss1(1:nzhsym))/nzhsym
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ss1=ss1/xmed - 1.0
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do j=1,nzhsym
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if(ss1(j).gt.3.0) ss1(j)=3.0
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enddo
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smax=0.
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do lag=lag1,lag2 !DT = 2.5 to 5.0 s
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sum1=0.
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do j=1,16 !Sum over 16 sync symbols
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k=ii2(j) + lag
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if(k.ge.1 .and. k.le.nzhsym) sum1=sum1 + ss1(k)
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enddo
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if(sum1.gt.smax) then
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smax=sum1
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ipk=i
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endif
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enddo
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ccfred(i)=smax !Best at this freq, over all lags
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if(smax.gt.sbest) then
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sbest=smax
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ipkbest=ipk
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endif
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enddo
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call pctile(ccfred(ia),ib-ia+1,50,xmed)
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if(xmed.le.0.0) xmed=1.0
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ccfred=2.0*ccfred/xmed
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return
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end subroutine sync9
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