WSJT-X/libm65/map65a.f90

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subroutine map65a(dd,ss,savg,newdat,nutc,fcenter,ntol,idphi,nfa,nfb, &
mousedf,mousefqso,nagain,ndecdone,ndiskdat,nfshift,ndphi, &
nfcal,nkeep,mcall3b,nsum,nsave,nxant,rmsdd,mycall,mygrid, &
neme,ndepth,hiscall,hisgrid,nhsym,nfsample,nxpol,nmode,nfast)
! Processes timf2 data from Linrad to find and decode JT65 signals.
parameter (MAXMSG=1000) !Size of decoded message list
parameter (NSMAX=60*96000)
parameter (NFFT=32768)
real dd(4,NSMAX)
real*4 ss(4,322,NFFT),savg(4,NFFT)
real tavg(-50:50) !Temp for finding local base level
real base(4) !Local basel level at 4 pol'ns
real sig(MAXMSG,30) !Parameters of detected signals
real a(5)
real*8 fcenter
character*22 msg(MAXMSG)
character*3 shmsg0(4)
character mycall*12,hiscall*12,mygrid*6,hisgrid*6,grid*6,cp*1,cm*1
integer indx(MAXMSG),nsiz(MAXMSG)
logical done(MAXMSG)
logical xpol,bqra64
character decoded*22,blank*22,cmode*2
real short(3,NFFT) !SNR dt ipol for potential shorthands
real qphi(12)
common/c3com/ mcall3a
common/testcom/ifreq
data blank/' '/,cm/'#'/
data shmsg0/'ATT','RO ','RRR','73 '/
data nfile/0/,nutc0/-999/,nid/0/,ip000/1/,ip001/1/,mousefqso0/-999/
save
mode65=mod(nmode,10)
if(mode65.eq.3) mode65=4
modeqra64=nmode/10
bqra64=modeqra64.gt.0
mcall3a=mcall3b
mousefqso0=mousefqso
xpol=(nxpol.ne.0)
if(.not.xpol) ndphi=0
nsum=0
!### Should use AppDir! ###
! open(23,file='release/CALL3.TXT',status='unknown')
open(23,file='CALL3.TXT',status='unknown')
if(nutc.ne.nutc0) nfile=nfile+1
nutc0=nutc
df=96000.0/NFFT !df = 96000/NFFT = 2.930 Hz
if(nfsample.eq.95238) df=95238.1/NFFT
ftol=0.010 !Frequency tolerance (kHz)
dphi=idphi/57.2957795
foffset=0.001*(1270 + nfcal) !Offset from sync tone, plus CAL
fqso=mousefqso + foffset - 0.5*(nfa+nfb) + nfshift !fqso at baseband (khz)
iloop=0
2 if(ndphi.eq.1) dphi=30*iloop/57.2957795
nqdz=1
if(bqra64) nqdz=2
do nqd=nqdz,0,-1
if(nqd.eq.2) then
fa=1000.0*fqso
fb=1000.0*fqso
else if(nqd.eq.1) then !Quick decode, at fQSO
fa=1000.0*(fqso+0.001*mousedf) - ntol
fb=1000.0*(fqso+0.001*mousedf) + ntol + 4*53.8330078
else !Wideband decode at all freqs
fa=-1000*0.5*(nfb-nfa) + 1000*nfshift
fb= 1000*0.5*(nfb-nfa) + 1000*nfshift
endif
ia=nint(fa/df) + 16385
ib=nint(fb/df) + 16385
ia=max(51,ia)
ib=min(32768-51,ib)
km=0
nkm=1
nz=n/8
freq0=-999.
sync10=-999.
fshort0=-999.
syncshort0=-999.
ntry=0
short=0. !Zero the whole short array
jpz=1
if(xpol) jpz=4
do i=ia,ib !Search over freq range
freq=0.001*(i-16385)*df
! Find the local base level for each polarization; update every 10 bins.
if(mod(i-ia,10).eq.0) then
do jp=1,jpz
do ii=-50,50
iii=i+ii
if(iii.ge.1 .and. iii.le.32768) then
tavg(ii)=savg(jp,iii)
else
write(13,*) ,'Error in iii:',iii,ia,ib,fa,fb
flush(13)
go to 999
endif
enddo
call pctile(tavg,101,50,base(jp))
enddo
endif
! Find max signal at this frequency
smax=0.
do jp=1,jpz
if(savg(jp,i)/base(jp).gt.smax) then
smax=savg(jp,i)/base(jp)
jpmax=jp
endif
enddo
if(smax.gt.1.1 .or. ia.eq.ib) then
if(nqd.lt.2) then
! Look for JT65 sync patterns and shorthand square-wave patterns.
call timer('ccf65 ',0)
ssmax=smax
call ccf65(ss(1,1,i),nhsym,nfast,ssmax,sync1,ipol,jpz,dt, &
flipk,syncshort,snr2,ipol2,dt2)
call timer('ccf65 ',1)
! ########################### Search for Shorthand Messages #################
! Is there a shorthand tone above threshold?
thresh0=1.0
! Use lower thresh0 at fQSO
if(nqd.eq.1 .and. ntol.le.100) thresh0=0.
if(syncshort.gt.thresh0) then
! ### Do shorthand AFC here (or maybe after finding a pair?) ###
short(1,i)=syncshort
short(2,i)=dt2
short(3,i)=ipol2
! Check to see if lower tone of shorthand pair was found.
do j=2,4
i0=i-nint(j*mode65*10.0*(11025.0/4096.0)/df)
! Should this be i0 +/- 1, or just i0?
! Should we also insist that difference in DT be either 1.5 or -1.5 s?
if(short(1,i0).gt.thresh0) then
fshort=0.001*(i0-16385)*df
noffset=0
if(nqd.eq.1) noffset=nint(1000.0*(fshort-fqso)-mousedf)
if(abs(noffset).le.ntol) then
! Keep only the best candidate within ftol.
!### NB: sync2 was not defined here!
! sync2=syncshort !### try this ???
if(fshort-fshort0.le.ftol .and. &
syncshort.gt.syncshort0 .and. nkm.eq.2) km=km-1
if(fshort-fshort0.gt.ftol .or. &
syncshort.gt.syncshort0) then
if(km.lt.MAXMSG) km=km+1
sig(km,1)=nfile
sig(km,2)=nutc
sig(km,3)=fshort + 0.5*(nfa+nfb)
sig(km,4)=syncshort
sig(km,5)=dt2
sig(km,6)=45*(ipol2-1)/57.2957795
sig(km,7)=0
sig(km,8)=snr2
sig(km,9)=0
sig(km,10)=0
! sig(km,11)=rms0
sig(km,12)=savg(ipol2,i)
sig(km,13)=0
sig(km,14)=0
sig(km,15)=0
sig(km,16)=0
! sig(km,17)=0
sig(km,18)=0
msg(km)=shmsg0(j)
fshort0=fshort
syncshort0=syncshort
nkm=2
endif
endif
endif
enddo
endif
endif
! ########################### Search for Normal Messages ###########
! Is sync1 above threshold?
thresh1=1.0
! Use lower thresh1 at fQSO
if(nqd.eq.1 .and. ntol.le.100) thresh1=0.
noffset=0
if(nqd.ge.1) noffset=nint(1000.0*(freq-fqso)-mousedf)
if(nqd.eq.2) then
sync1=thresh1+1.0
noffset=0
endif
if(sync1.gt.thresh1 .and. abs(noffset).le.ntol) then
! Keep only the best candidate within ftol.
! (Am I deleting any good decodes by doing this?)
if(freq-freq0.le.ftol .and. sync1.gt.sync10 .and. &
nkm.eq.1) km=km-1
if(freq-freq0.gt.ftol .or. sync1.gt.sync10) then
nflip=nint(flipk)
f00=(i-1)*df !Freq of detected sync tone (0-96000 Hz)
ntry=ntry+1
if((nqd.eq.1 .and. ntry.ge.40) .or. &
(nqd.eq.0 .and. ntry.ge.400)) then
! Too many calls to decode1a!
write(*,*) '! Signal too strong, or suspect data? Decoding aborted.'
write(13,*) 'Signal too strong, or suspect data? Decoding aborted.'
call flush(13)
go to 999
endif
call timer('decode1a',0)
ifreq=i
ikHz=nint(freq+0.5*(nfa+nfb)-foffset)-nfshift
idf=nint(1000.0*(freq+0.5*(nfa+nfb)-foffset-(ikHz+nfshift)))
call decode1a(dd,newdat,f00,nflip,mode65,nfast,nfsample, &
xpol,mycall,hiscall,hisgrid,neme,ndepth,nqd,dphi, &
ndphi,iloop,nutc,ikHz,idf,ipol,ntol,bqra64,sync2, &
a,dt,pol,nkv,nhist,nsum,nsave,qual,decoded)
call timer('decode1a',1)
if(nqd.eq.2) then
call timer('qra64 ',0)
call qra64b(nutc,nqd,ikhz,mousedf,ntol,xpol,mycall, &
hiscall,hisgrid,nwrite_qra64)
call timer('qra64 ',1)
cycle
endif
if(km.lt.MAXMSG) km=km+1
sig(km,1)=nfile
sig(km,2)=nutc
sig(km,3)=freq + 0.5*(nfa+nfb)
sig(km,4)=sync1
sig(km,5)=dt
sig(km,6)=pol
sig(km,7)=flipk
sig(km,8)=sync2
sig(km,9)=nkv
sig(km,10)=qual
! sig(km,11)=idphi
sig(km,12)=savg(ipol,i)
sig(km,13)=a(1)
sig(km,14)=a(2)
sig(km,15)=a(3)
sig(km,16)=a(4)
! sig(km,17)=a(5)
sig(km,18)=nhist
msg(km)=decoded
freq0=freq
sync10=sync1
nkm=1
endif
endif
endif
enddo
if(nqd.eq.1) then
nwrite=0
do k=1,km
decoded=msg(k)
if(decoded.ne.' ') then
nutc=sig(k,2)
freq=sig(k,3)
sync1=sig(k,4)
dt=sig(k,5)
npol=nint(57.2957795*sig(k,6))
flip=sig(k,7)
sync2=sig(k,8)
nkv=sig(k,9)
nqual=sig(k,10)
! idphi=nint(sig(k,11))
if(flip.lt.0.0) then
do i=22,1,-1
if(decoded(i:i).ne.' ') go to 8
enddo
stop 'Error in message format'
8 if(i.le.18) decoded(i+2:i+4)='OOO'
endif
nkHz=nint(freq-foffset)-nfshift
mhz=fcenter ! ... +fadd ???
f0=mhz+0.001*nkHz
ndf=nint(1000.0*(freq-foffset-(nkHz+nfshift)))
nsync1=sync1
s2db=10.0*log10(sync2) - 40 !### empirical ###
nsync2=nint(s2db)
if(nfast.eq.2) nsync2=nint(s2db + 6.5)
if(decoded(1:4).eq.'RO ' .or. decoded(1:4).eq.'RRR ' .or. &
decoded(1:4).eq.'73 ') then
if(nfast.eq.1) nsync2=nint(1.33*s2db + 2.0)
if(nfast.eq.2) nsync2=nint(1.33*s2db + 2.7)
endif
nwrite=nwrite+1
if(nxant.ne.0) then
npol=npol-45
if(npol.lt.0) npol=npol+180
endif
! If Tx station's grid is in decoded message, compute optimum TxPol
i1=index(decoded,' ')
i2=index(decoded(i1+1:),' ') + i1
grid=' '
if(i2.ge.8 .and. i2.le.18) grid=decoded(i2+1:i2+4)//'mm'
ntxpol=0
cp=' '
if(xpol) then
if(grid(1:1).ge.'A' .and. grid(1:1).le.'R' .and. &
grid(2:2).ge.'A' .and. grid(2:2).le.'R' .and. &
grid(3:3).ge.'0' .and. grid(3:3).le.'9' .and. &
grid(4:4).ge.'0' .and. grid(4:4).le.'9') then
ntxpol=mod(npol-nint(2.0*dpol(mygrid,grid))+720,180)
if(nxant.eq.0) then
cp='H'
if(ntxpol.gt.45 .and. ntxpol.le.135) cp='V'
else
cp='/'
if(ntxpol.ge.90 .and. ntxpol.lt.180) cp='\\'
endif
endif
endif
if(ndphi.eq.0) then
write(*,1010) nkHz,ndf,npol,nutc,dt,nsync2, &
cm,decoded,nkv,nqual,ntxpol,cp
1010 format('!',i3,i5,i4,i6.4,1x,f5.1,i4,a1,1x,a22,i2,i5,i5,1x,a1)
else
if(iloop.ge.1) qphi(iloop)=sig(k,10)
write(*,1010) nkHz,ndf,npol,nutc,dt,nsync2, &
cm,decoded,nkv,nqual,30*iloop
write(27,1011) 30*iloop,nkHz,ndf,npol,nutc, &
dt,sync2,nkv,nqual,cm,decoded
1011 format(i3,i4,i5,i4,i6.4,1x,f5.1,f7.1,i3,i5,a1,1x,a22)
endif
endif
enddo
if(nwrite.eq.0 .and. nwrite_qra64.eq.0) then
write(*,1012) mousefqso,nutc
1012 format('!',i3,9x,i6.4,' ')
endif
endif
if(ndphi.eq.1 .and.iloop.lt.12) then
iloop=iloop+1
go to 2
endif
if(ndphi.eq.1 .and.iloop.eq.12) call getdphi(qphi)
if(nqd.ge.1) then
write(*,1013) nsum,nsave
1013 format('<QuickDecodeDone>',2i4)
flush(6)
endif
! if(nqd.eq.2) exit !### TESTING: do only QRA64
if(nagain.eq.1 .and. nqd.eq.1) go to 999
enddo
! Trim the list and produce a sorted index and sizes of groups.
! (Should trimlist remove all but best SNR for given UTC and message content?)
call trimlist(sig,km,ftol,indx,nsiz,nz)
do i=1,km
done(i)=.false.
enddo
j=0
ilatest=-1
do n=1,nz
ifile0=0
do m=1,nsiz(n)
i=indx(j+m)
ifile=sig(i,1)
if(ifile.gt.ifile0 .and.msg(i).ne.blank) then
ilatest=i
ifile0=ifile
endif
enddo
i=ilatest
if(i.ge.1) then
if(.not.done(i)) then
done(i)=.true.
nutc=sig(i,2)
freq=sig(i,3)
sync1=sig(i,4)
dt=sig(i,5)
npol=nint(57.2957795*sig(i,6))
flip=sig(i,7)
sync2=sig(i,8)
nkv=sig(i,9)
nqual=min(sig(i,10),10.0)
! rms0=sig(i,11)
do k=1,5
a(k)=sig(i,12+k)
enddo
nhist=sig(i,18)
decoded=msg(i)
if(flip.lt.0.0) then
do i=22,1,-1
if(decoded(i:i).ne.' ') go to 10
enddo
stop 'Error in message format'
10 if(i.le.18) decoded(i+2:i+4)='OOO'
endif
mhz=fcenter !... +fadd ???
nkHz=nint(freq-foffset)-nfshift
f0=mhz+0.001*nkHz
ndf=nint(1000.0*(freq-foffset-(nkHz+nfshift)))
ndf0=nint(a(1))
ndf1=nint(a(2))
ndf2=nint(a(3))
nsync1=sync1
s2db=10.0*log10(sync2) - 40 !### empirical ###
nsync2=nint(s2db)
if(nfast.eq.2) nsync2=nint(s2db + 6.5)
if(decoded(1:4).eq.'RO ' .or. decoded(1:4).eq.'RRR ' .or. &
decoded(1:4).eq.'73 ') then
if(nfast.eq.1) nsync2=nint(1.33*s2db + 2.0)
if(nfast.eq.2) nsync2=nint(1.33*s2db + 2.7)
endif
if(nxant.ne.0) then
npol=npol-45
if(npol.lt.0) npol=npol+180
endif
! If Tx station's grid is in decoded message, compute optimum TxPol
i1=index(decoded,' ')
i2=index(decoded(i1+1:),' ') + i1
grid=' '
if(i2.ge.8 .and. i2.le.18) grid=decoded(i2+1:i2+4)//'mm'
ntxpol=0
cp=' '
if(xpol) then
if(grid(1:1).ge.'A' .and. grid(1:1).le.'R' .and. &
grid(2:2).ge.'A' .and. grid(2:2).le.'R' .and. &
grid(3:3).ge.'0' .and. grid(3:3).le.'9' .and. &
grid(4:4).ge.'0' .and. grid(4:4).le.'9') then
ntxpol=mod(npol-nint(2.0*dpol(mygrid,grid))+720,180)
if(nxant.eq.0) then
cp='H'
if(ntxpol.gt.45 .and. ntxpol.le.135) cp='V'
else
cp='/'
if(ntxpol.ge.90 .and. ntxpol.lt.180) cp='\\'
endif
endif
endif
cmode='A '
if(mode65.eq.2) cmode='B '
if(mode65.eq.4) cmode='C '
if(nfast.eq.2) cmode(2:2)='2'
write(26,1014) f0,ndf,ndf0,ndf1,ndf2,dt,npol,nsync1, &
nsync2,nutc,decoded,cp,cmode
write(21,1014) f0,ndf,ndf0,ndf1,ndf2,dt,npol,nsync1, &
nsync2,nutc,decoded,cp,cmode
1014 format(f8.3,i5,3i3,f5.1,i4,i3,i4,i5.4,4x,a22,2x,a1,3x,a2)
endif
endif
j=j+nsiz(n)
enddo
write(26,1015) nutc
1015 format(38x,i6.4,' ')
call flush(21)
call flush(26)
call display(nkeep,ftol)
ndecdone=2
999 close(23)
ndphi=0
nagain=0
mcall3b=mcall3a
return
end subroutine map65a