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8b55eb3a28
git-svn-id: svn+ssh://svn.code.sf.net/p/wsjt/wsjt/branches/jtms3@2519 ab8295b8-cf94-4d9e-aec4-7959e3be5d79
43 lines
1.0 KiB
Fortran
43 lines
1.0 KiB
Fortran
subroutine ping(s,nz,dtbuf,slim,wmin,pingdat,nping)
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! Detect pings and make note of their start time, duration, and peak strength.
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real*4 s(nz)
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real*4 pingdat(3,100)
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logical inside
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nping=0
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peak=0.
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inside=.false.
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snrlim=10.0**(0.1*slim) - 1.0
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sdown=10.0*log10(0.25*snrlim+1.0)
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i0=0 !Silence compiler warnings.
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tstart=0.0
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do i=2,nz
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if(s(i).ge.slim .and. .not.inside) then
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i0=i
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tstart=i0*dtbuf
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inside=.true.
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peak=0.
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endif
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if(inside .and. s(i).gt.peak) then
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peak=s(i)
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endif
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if(inside .and. (s(i).lt.sdown .or. i.eq.nz)) then
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if(i.gt.i0) then
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if(dtbuf*(i-i0).ge.wmin) then
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if(nping.le.99) nping=nping+1
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pingdat(1,nping)=tstart
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pingdat(2,nping)=dtbuf*(i-i0)
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pingdat(3,nping)=peak
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endif
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inside=.false.
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peak=0.
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endif
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endif
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enddo
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return
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end subroutine ping
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