National Geospatial Agency « NGA/NASA EGM96, N=M=360 Earth Gravitational Model » NGA/NASA EGM96, N=M=360 Earth Gravitational Model "NGA: NGA/NASA EGM96, N=M=360 Earth Gravitational Model" Earth Gravity Model 1996 NASA EGM96 EGM96 "NGA: NGA/NASA EGM96, N=M=360 Earth Gravitational Model" Geoid Height EGM96 EGM96 מידע על EGM96 מאתר NGA EGM96 EGM96 EGM96