GRAV-D G ravity for the R e-definition of the A merican V ertical D atum.
Modernizing the Geopotential Datum: Replacing NAVD 88 Daniel R. Roman, Ph.D.
GRAV-D Project A Height Mod. Project September 9, 2009 Fairbanks, Alaska September 9, 2009 Mark C. Eckl (Presenter – Chief, Observation and Analysis Division)
