WSJT-X/lib/fix_contest_msg.f90

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subroutine fix_contest_msg(mycall,mygrid,hiscall,msg)
! If msg is "mycall hiscall grid1" and distance from mygrid to grid1 is more
! thsn 10000 km, change "grid1" to "R grid2" where grid2 is the antipodes
! of grid1.
character*6 mycall,mygrid,hiscall
character*22 msg
character*6 g1,g2
logical isgrid
n=len(trim(msg))
if(n.lt.4) return
g1=msg(n-3:n)//' '
if(isgrid(g1)) then
call azdist(mygrid,g1,0.d0,nAz,nEl,nDmiles,nDkm,nHotAz,nHotABetter)
if(ndkm.gt.10000) then
call grid2deg(g1,dlong,dlat)
dlong=dlong+180.0
if(dlong.gt.180.0) dlong=dlong-360.0
dlat=-dlat
call deg2grid(dlong,dlat,g2)
msg=msg(1:n-4)//'R '//g2(1:4)
endif
endif
return
end subroutine fix_contest_msg