subroutine sync9(ss,tstep,df3,ntol,nfqso,ccfred,ia,ib,ipkbest) parameter (NSMAX=22000) !Max length of saved spectra real ss(184,NSMAX) real ccfred(NSMAX) include 'jt9sync.f90' ipk=0 ipkbest=0 ia=1 ib=min(1000,nint(1000.0/df3)) if(ntol.lt.1000) then ia=nint((nfqso-1000-ntol)/df3) ib=nint((nfqso-1000+ntol)/df3) if(ia.lt.1) ia=1 if(ib.gt.NSMAX) ib=NSMAX endif sbest=0. lagmax=2.5/tstep + 0.9999 ccfred=0. do i=ia,ib smax=0. do lag=-lagmax,lagmax sum=0. do j=1,16 k=ii2(j) + lag ! if(k.ge.1) sum=sum + ss(k,i) if(k.ge.1) sum=sum + ss(k,i) - 0.5*(ss(k+2,i)+ss(k+4,i)) enddo if(sum.gt.smax) then smax=sum ipk=i lagpk=lag endif enddo ccfred(i)=smax !Best at this freq, over all lags if(smax.gt.sbest) then sbest=smax ipkbest=ipk lagpkbest=lagpk endif enddo call pctile(ccfred(ia),ib-ia+1,50,xmed) ccfred=ccfred/xmed return end subroutine sync9