subroutine extract(s3,nadd,ncount,nhist,decoded) real s3(64,63) real tmp(4032) character decoded*22 integer era(51),dat4(12),indx(64) integer mrsym(63),mr2sym(63),mrprob(63),mr2prob(63) logical first data first/.true./,nsec1/0/ save nfail=0 1 call demod64a(s3,nadd,mrsym,mrprob,mr2sym,mr2prob,ntest,nlow) if(ntest.lt.50 .or. nlow.gt.20) then ncount=-999 !Flag bad data go to 900 endif call chkhist(mrsym,nhist,ipk) if(nhist.ge.20) then nfail=nfail+1 call pctile(s3,tmp,4032,50,base) ! ### or, use ave from demod64a do j=1,63 s3(ipk,j)=base enddo go to 1 endif call graycode(mrsym,63,-1) call interleave63(mrsym,-1) call interleave63(mrprob,-1) ndec=1 nemax=30 !Was 200 (30) maxe=8 xlambda=12.0 !Was 15 (12) if(ndec.eq.1) then call graycode(mr2sym,63,-1) call interleave63(mr2sym,-1) call interleave63(mr2prob,-1) nsec1=nsec1+1 write(22,rec=1) nsec1,xlambda,maxe,200, + mrsym,mrprob,mr2sym,mr2prob call flushqqq(22) call runqqq('kvasd.exe','-q',iret) if(iret.ne.0) then if(first) write(*,1000) iret 1000 format('Error in KV decoder, or no KV decoder present.'/ + 'Return code:',i8,'. Will use BM algorithm.') ndec=0 first=.false. go to 20 endif read(22,rec=2) nsec2,ncount,dat4 decoded=' ' if(ncount.ge.0) then call unpackmsg(dat4,decoded) !Unpack the user message endif endif 20 if(ndec.eq.0) then call indexx(63,mrprob,indx) do i=1,nemax j=indx(i) if(mrprob(j).gt.120) then ne2=i-1 go to 2 endif era(i)=j-1 enddo ne2=nemax 2 decoded=' ' do nerase=0,ne2,2 call rs_decode(mrsym,era,nerase,dat4,ncount) if(ncount.ge.0) then call unpackmsg(dat4,decoded) go to 900 endif enddo endif 900 return end