diff --git a/lib/fsk4hf/wspr5d.f90 b/lib/fsk4hf/wspr5d.f90
index 6597af58d..7eb776487 100644
--- a/lib/fsk4hf/wspr5d.f90
+++ b/lib/fsk4hf/wspr5d.f90
@@ -110,6 +110,7 @@ program wspr5d
      if(j1.gt.0) then
         read(10,end=999) fname,ntrmin,fMHz,c
         read(fname(8:11),*) nutc
+        write(datetime,'(i11)') nutc
      else if(j2.gt.0) then
         read(10,end=999) ihdr,iwave
         read(infile(j2-4:j2-1),*) nutc
diff --git a/lib/fsk4hf/wspr5d_exp.f90 b/lib/fsk4hf/wspr5d_exp.f90
index 80b093b7f..b92ae8a57 100644
--- a/lib/fsk4hf/wspr5d_exp.f90
+++ b/lib/fsk4hf/wspr5d_exp.f90
@@ -99,6 +99,7 @@ program wspr5d
     if(j1.gt.0) then
        read(10,end=999) fname,ntrmin,fMHz,c
        read(fname(8:11),*) nutc
+       write(datetime,'(i11)') nutc
     else if(j2.gt.0) then
        read(10,end=999) ihdr,iwave
        read(infile(j2-4:j2-1),*) nutc
@@ -118,7 +119,7 @@ program wspr5d
 !write(*,*) fc1+fc2
     call downsample(c,fc1+fc2,cd)
 
-  do ncoh=0,1
+  do ncoh=1,0,-1
     do is=0,9
       idt=is/2
       if( mod(is,2).eq. 1 ) idt=-is/2 
@@ -140,9 +141,6 @@ program wspr5d
         sbits(i+3)=r1
       enddo
 
-!      ebits=hbits(1:411)
-!      isum=sum(id(1:205)*(2*ebits(1:409:2)-1))/2
-!write(*,*) is,isum  
       j=1
       do i=1,205
         if( abs(id(i)) .ne. 2 ) then
@@ -248,7 +246,6 @@ do idf=0,idfmax
     cmbest=cm
   endif
 enddo
-!write(*,'(f10.3)') fbest 
 end subroutine mskseqdet
 
 subroutine downsample(ci,f0,co)
diff --git a/lib/fsk4hf/wspr5sim.f90 b/lib/fsk4hf/wspr5sim.f90
index ea84540ff..8741eb322 100644
--- a/lib/fsk4hf/wspr5sim.f90
+++ b/lib/fsk4hf/wspr5sim.f90
@@ -17,9 +17,9 @@ program wspr5sim
 
 ! Get command-line argument(s)
   nargs=iargc()
-  if(nargs.ne.6) then
-     print*,'Usage:   wspr5sim "message"       f0  DT nwav nfiles snr'
-     print*,'Example: wspr5sim "K1ABC FN42 30" 50 0.0  0     10   -33'
+  if(nargs.ne.8) then
+     print*,'Usage:   wspr5sim "message"       f0  DT fsp del  nwav nfiles snr'
+     print*,'Example: wspr5sim "K1ABC FN42 30" 50 0.0 0.1 1.0  1      10   -33'
      go to 999
   endif
   call getarg(1,msg)                     !Message to be transmitted
@@ -28,10 +28,14 @@ program wspr5sim
   call getarg(3,arg)
   read(arg,*) xdt                        !Time offset from nominal (s)
   call getarg(4,arg)
-  read(arg,*) nwav                       !1 for *.wav file, 0 for *.c5 file
+  read(arg,*) fspread                    !Watterson frequency spread (Hz)
   call getarg(5,arg)
-  read(arg,*) nfiles                     !Number of files
+  read(arg,*) delay                      !Watterson delay (ms)
   call getarg(6,arg)
+  read(arg,*) nwav                       !1 for *.wav file, 0 for *.c5 file
+  call getarg(7,arg)
+  read(arg,*) nfiles                     !Number of files
+  call getarg(8,arg)
   read(arg,*) snrdb                      !SNR_2500
 
   twopi=8.0*atan(1.0)
@@ -68,6 +72,11 @@ program wspr5sim
         if(k.ge.0 .and. k.lt.NZ) c0(k)=cmplx(cos(xphi),sin(xphi))
      enddo
   enddo
+
+  if( fspread .ne. 0.0 .or. delay .ne. 0.0 ) then
+    call watterson(c0,NZ,fs,delay,fspread)
+  endif
+
   c0=sig*c0                              !Scale to requested sig level
 
   do ifile=1,nfiles