ft8d/ft8d.f90

69 lines
1.9 KiB
Fortran
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program ft8d
! Decode FT8 data read from *.c2 files.
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include 'ft8_params.f90'
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character infile*80,date*6
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character msgcall*6,msggrid*4
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real s(NFFT1,NHSYM)
real sbase(NFFT1)
real candidate(3,200)
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real*8 dialfreq
complex dd(NMAX,4)
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logical newdat
integer apsym(KK)
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nargs=iargc()
if(nargs.ne.1) then
print*,'Usage: ft8d file'
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go to 999
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endif
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)
tt=NSPS*dt !Duration of "itone" symbols (s)
ts=2*NSPS*dt !Duration of OQPSK symbols (s)
baud=1.0/tt !Keying rate (baud)
txt=NZ*dt !Transmission length (s)
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nfa=-1600
nfb=+1600
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nfqso=0
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call getarg(1,infile)
open(10,file=infile,status='old',access='stream')
read(10,end=999) dialfreq,dd
close(10)
j2=index(infile,'.c2')
read(infile(j2-6:j2-1),*) nutc
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date=infile(j2-13:j2-8)
do ipart=1,4
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ndecodes=0
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ndepth=1
newdat=.true.
syncmin=1.5
call sync8(dd(1:NMAX,ipart),nfa+2000,nfb+2000,syncmin, &
nfqso+2000,s,candidate,ncand,sbase)
do icand=1,ncand
sync=candidate(3,icand)
f1=candidate(1,icand)
xdt=candidate(2,icand)
xbase=10.0**(0.1*(sbase(nint(f1/3.125))-40.0))
call ft8b(dd(1:NMAX,ipart),newdat,nQSOProgress,nfqso+2000, &
nftx,ndepth,lft8apon,lapcqonly,napwid,nagain,iaptype, &
f1,xdt,xbase,apsym,nharderrors,dmin,nbadcrc,iappass, &
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msgcall,msggrid,xsnr)
nsnr=nint(xsnr)
xdt=xdt-0.5
hd=nharderrors+dmin
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if(nbadcrc.eq.0) then
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write(*,1004) date,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(a6,1x,i6,f6.1,i4,f6.2,i9,1x,a6,1x,a4)
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endif
enddo
enddo ! ipart loop
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999 end program ft8d