Airborne Gravity Topo to GeoTiff for Leapfrog

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Hello all,

I have a topo grid that someone wants the coordinates converted (I've imported into Target and done this), and then converted to TIFF format (for Leapfrog I believe to be imported as a mesh). 

Is there a way to do this? I'm not super familiar with dealing with grids, and I keep running into issues.