WSJT-X/lib/flat3.f90
Joe Taylor ed91a35847 1. Corrected handling of compound callsigns: use JT65v1 encoding if
applicable, JT65v2 otherwise.  Thanks to DL9RDZ!

2. Fix a bug in flat3.f90, evident on OSX systems.  Thanks to G4KLA!

3. The Makefile now copy the jt9code executable into the destination
   directory for to-be-packaged executables.



git-svn-id: svn+ssh://svn.code.sf.net/p/wsjt/wsjt/branches/wsjtx@3648 ab8295b8-cf94-4d9e-aec4-7959e3be5d79
2014-01-18 13:59:19 +00:00

75 lines
1.4 KiB
Fortran

subroutine flat3(s0,iz,nfa,nfb,nterms,ynoise,s)
implicit real*8 (a-h,o-z)
parameter (NSMAX=6827)
real*4 s0(iz)
real*4 s(iz)
real*4 ynoise,y4,db
real*8 x(NSMAX)
real*8 y(NSMAX)
real*8 y0(NSMAX)
real*8 yfit(NSMAX)
real*8 a(10)
integer ii(NSMAX)
npts0=999999
df=12000.0/16384.0
do i=1,iz
y0(i)=db(s0(i))
enddo
ia=(nfa+200.0)/df
ib=5000.0/df
if(nfb.gt.0) ib=nfb/df
j=0
do i=ia,ib
j=j+1
x(j)=i*df
y(j)=y0(i)
ii(j)=i
enddo
npts=j
mode=0
a=0.0
do iter=1,99
call polfit(x,y,y,npts,nterms,mode,a,chisqr)
do i=1,ib
f=i*df
yfit(i)=a(nterms)
do n=nterms-1,1,-1
yfit(i)=f*yfit(i) + a(n)
enddo
! write(21,1010) f,y0(i),yfit(i),y0(i)-yfit(i)
!1010 format(4f12.3)
enddo
k=0
do j=1,npts
y1=y(j)-yfit(ii(j))
if(y1.lt.ynoise) then
! if(y1.lt.ynoise .and. y1.gt.-ynoise) then
k=k+1
x(k)=x(j)
y(k)=y(j)
ii(k)=ii(j)
endif
enddo
npts=k
if(npts.eq.npts0 .or. npts.lt.(ib-ia)/10) exit
npts0=npts
enddo
! do j=1,npts
! write(22,1010) x(j),y(j),yfit(ii(j)),y(j)-yfit(ii(j))
! enddo
do i=1,ib
y4=y0(i)-yfit(i) - 10.0
s(i)=10.0**(0.1*y4)
enddo
end subroutine flat3