mirror of https://github.com/pavel-demin/ft8d.git
70 lines
1.9 KiB
Fortran
70 lines
1.9 KiB
Fortran
program ft8d
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! Decode FT8 data read from *.c2 files.
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include 'ft8_params.f90'
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character infile*80,datetime*13,message*22,msg37*37
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character msgcall*12, msggrid*4
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real s(NFFT1,NHSYM)
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real sbase(NFFT1)
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real candidate(3,200)
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real*8 dialfreq
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complex dd(NMAX,4)
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logical newdat
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integer apsym(KK)
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nargs=iargc()
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if(nargs.ne.1) then
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print*,'Usage: ft8d file'
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go to 999
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endif
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twopi=8.0*atan(1.0)
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fs=4000.0 !Sample rate
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dt=1.0/fs !Sample interval (s)
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tt=NSPS*dt !Duration of "itone" symbols (s)
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ts=2*NSPS*dt !Duration of OQPSK symbols (s)
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baud=1.0/tt !Keying rate (baud)
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txt=NZ*dt !Transmission length (s)
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nfa=-1600
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nfb=+1600
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nfqso=0
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call getarg(1,infile)
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open(10,file=infile,status='old',access='stream')
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read(10,end=999) dialfreq,dd
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close(10)
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j2=index(infile,'.c2')
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read(infile(j2-6:j2-1),*) nutc
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datetime=infile(j2-13:j2-1)
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do ipart=1,4
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ndecodes=0
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ndepth=1
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newdat=.true.
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syncmin=1.5
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call sync8(dd(1:NMAX,ipart),nfa+2000,nfb+2000,syncmin, &
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nfqso+2000,s,candidate,ncand,sbase)
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do icand=1,ncand
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sync=candidate(3,icand)
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f1=candidate(1,icand)
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xdt=candidate(2,icand)
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xbase=10.0**(0.1*(sbase(nint(f1/3.125))-40.0))
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call ft8b(dd(1:NMAX,ipart),newdat,nQSOProgress,nfqso+2000, &
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nftx,ndepth,lft8apon,lapcqonly,napwid,nagain,iaptype, &
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f1,xdt,xbase,apsym,nharderrors,dmin,nbadcrc,iappass, &
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msgcall,msggrid,xsnr)
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message=msg37(1:22)
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nsnr=nint(xsnr)
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xdt=xdt-0.5
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hd=nharderrors+dmin
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if(nbadcrc.eq.0) then
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write(*,1004) nutc+15*(ipart-1),min(sync,999.0),nint(xsnr), &
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xdt,nint(f1-2000+dialfreq),msgcall,msggrid
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1004 format(i6.6,f6.1,i4,f6.2,i9,1x,a12,1x,a4)
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endif
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enddo
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enddo ! ipart loop
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999 end program ft8d
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