WSJT-X/libm65/k2grid.f90

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subroutine k2grid(k,grid)
character grid*6
nlong=2*mod((k-1)/5,90)-179
if(k.gt.450) nlong=nlong+180
nlat=mod(k-1,5)+ 85
dlat=nlat
dlong=nlong
call deg2grid(dlong,dlat,grid)
return
end subroutine k2grid