Dear Wrf-users,<div><br></div><div>I need to trace a ray through wrf 3D grid boxes (given sun's position as in elevation and forward azimuth or bearing). In order to do this i need to know where I am in the grid box. I know wrf grids are numbered west to east(i) and south to north(j). Given a latitude and longitude I can work out the i and j indices (using NCL's wrf_user_ll_to_ij script) which is a grid nearest my lat lon. The wrf_user_ll_to_ij function can return integer ij or real ij e.g i=38.46 and j=34.2. How do I know whether this corresponds to the edge or an position inside the grid? Does position ij refer to the edges or halfway inside the grid?</div>
<div><br></div><div>Please help!</div><div><br></div><div>Best regards,</div><div><br></div><div>Steve</div><div><br></div><div>Steve</div>