Again, thank you. Referencing that, I came across this within the documentation:
Accordingly, the height_ukmo.exe program may be used to compute a geopotential height field for these data sets. This program requires no command-line arguments, but reads the &metgrid namelist record to obtain the prefix of the intermediate files created by ungrib.exe; the intermediate files are expected to contain a SOILHGT field, from which the height_ukmo.exe program computes, with the aid of an auxiliary table, the 3-d geopotential height field. The computed height field is written to a new intermediate file with the prefix HGT, which should then be added to the fg_name namelist variable in the &metgrid namelist record before running metgrid.exe.
Is the GMTED2010 functioning as the geographic vertical datum that takes the WGS84 Ellispoid to a Geoid? Within the 2D spatial reference, is SOILHGT basically the orthometric height and the computed HGT the final, singular value used?