subroutine packgrid(grid,ng,text)

      parameter (NGBASE=180*180)
      character*4 grid
      logical text

      text=.false.
      if(grid.eq.'    ') go to 90                 !Blank grid is OK

C  Test for numerical signal report, etc.
      if(grid(1:1).eq.'-') then
         read(grid(2:3),*,err=1,end=1) n
 1       ng=NGBASE+1+n
         go to 100
      else if(grid(1:2).eq.'R-') then
         read(grid(3:4),*,err=2,end=2) n
 2       if(n.eq.0) go to 90
         ng=NGBASE+31+n
         go to 100
      else if(grid(1:2).eq.'RO') then
         ng=NGBASE+62
         go to 100
      else if(grid(1:3).eq.'RRR') then
         ng=NGBASE+63
         go to 100
      else if(grid(1:2).eq.'73') then
         ng=NGBASE+64
         go to 100
      endif

      if(grid(1:1).lt.'A' .or. grid(1:1).gt.'R') text=.true.
      if(grid(2:2).lt.'A' .or. grid(2:2).gt.'R') text=.true.
      if(grid(3:3).lt.'0' .or. grid(3:3).gt.'9') text=.true.
      if(grid(4:4).lt.'0' .or. grid(4:4).gt.'9') text=.true.
      if(text) go to 100

      call grid2deg(grid//'mm',dlong,dlat)
      long=dlong
      lat=dlat+ 90.0
      ng=((long+180)/2)*180 + lat
      go to 100

 90   ng=NGBASE + 1

 100  return
      end