2018-03-24 07:20:34 -04:00
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program ft8d
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2018-03-31 04:02:18 -04:00
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! Decode FT8 data read from *.c2 files.
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2018-03-24 07:20:34 -04:00
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include 'ft8_params.f90'
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2018-10-20 05:12:27 -04:00
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character infile*80,date*6,time*4
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2018-10-18 08:34:24 -04:00
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character msgcall*6,msggrid*4
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2018-04-01 11:36:02 -04:00
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real s(NFFT1,NHSYM)
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real sbase(NFFT1)
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2018-03-24 12:00:48 -04:00
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real candidate(3,200)
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2018-04-01 11:36:02 -04:00
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real*8 dialfreq
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2018-04-02 16:29:55 -04:00
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complex dd(NMAX,4)
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2018-04-19 16:09:02 -04:00
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logical newdat
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2018-03-24 12:00:48 -04:00
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integer apsym(KK)
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2018-03-24 07:20:34 -04:00
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nargs=iargc()
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2018-04-02 16:29:55 -04:00
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if(nargs.ne.1) then
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print*,'Usage: ft8d file'
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2018-03-24 12:06:33 -04:00
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go to 999
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2018-03-24 07:20:34 -04:00
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endif
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twopi=8.0*atan(1.0)
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2018-04-01 16:08:21 -04:00
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fs=4000.0 !Sample rate
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2018-03-24 07:20:34 -04:00
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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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2018-04-01 16:08:21 -04:00
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nfa=-1600
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nfb=+1600
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2018-04-01 11:36:02 -04:00
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nfqso=0
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2018-03-24 07:20:34 -04:00
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2018-04-02 16:29:55 -04:00
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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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2018-10-20 15:32:04 -04:00
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date=infile(j2-11:j2-6)
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time=infile(j2-4:j2-1)
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2018-04-02 16:29:55 -04:00
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do ipart=1,4
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2018-03-24 12:06:33 -04:00
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ndecodes=0
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2018-03-26 02:37:27 -04:00
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ndepth=1
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2018-04-19 10:49:30 -04:00
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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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2018-10-23 03:16:50 -04:00
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nfqso+2000,200,s,candidate,ncand,sbase)
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2018-04-19 10:49:30 -04:00
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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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2018-04-19 16:09:02 -04:00
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msgcall,msggrid,xsnr)
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2018-04-19 10:49:30 -04:00
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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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2018-04-19 16:09:02 -04:00
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if(nbadcrc.eq.0) then
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2018-10-20 05:12:27 -04:00
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write(*,1004) date,time,15*(ipart-1),min(sync,999.0),nint(xsnr), &
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2018-04-19 16:09:02 -04:00
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xdt,nint(f1-2000+dialfreq),msgcall,msggrid
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2018-10-20 05:12:27 -04:00
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1004 format(a6,1x,a4,i2.2,f6.1,i4,f6.2,i9,1x,a6,1x,a4)
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2018-03-24 12:06:33 -04:00
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endif
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enddo
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2018-04-02 16:29:55 -04:00
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enddo ! ipart loop
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2018-03-24 07:20:34 -04:00
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999 end program ft8d
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