Calculate geoid height as determined from EGM96 Geopotential Model
N = geoidegm96(lat, long)
N = geoidegm96(lat, long, action)
N = geoidegm96(lat, long) calculates the
geoid height as determined from the EGM96 Geopotential Model. It calculates
geoid heights to 0.01 meters. This function interpolates geoid heights
from a 15-minute grid of point values in the tide-free system, using
the EGM96 Geopotential Model to the degree and order 360. The geoid
undulations are relative to the WGS84 ellipsoid.
N = geoidegm96(lat, long, action) calculates
the geoid height as determined from the EGM96 Geopotential Model.
This function performs
out of range.
Inputs required by
|An array of |
|An array of |
|Action for out-of-range input. Specify if out-of-range input
invokes a |
Calculate the geoid height at 42.4 degrees N latitude and 71.0 degrees E longitude.
N = geoidegm96( 42.4, 71.0)
Calculate the geoid height at two different locations, with out-of-range actions generating warnings.
N = geoidegm96( [39.3,33.4], [-77.2, 36.5])
Calculate the geoid height with latitude wrapping, with out-of-range actions displaying no warnings.
N = geoidegm96(100,150,'None')
This function has the limitations of the 1996 Earth Geopotential
Model. For more information, see
The WGS84 EGM96 geoid undulations have an error range of +/-0.5 to +/-1.0 meters worldwide.
NIMA TR8350.2: "Department of Defense World Geodetic System 1984, Its Definition and Relationship with Local Geodetic Systems."
NASA/TP-1998-206861: "The Development of the Joint NASA GSFC and NIMA Geopotential Model EGM96"
National Geospatial-Intelligence Agency Website: