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Ellipsoid height given points on Globe?

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Joshua Carmichael
Joshua Carmichael on 13 Mar 2014
Do the elevation input arguments to ecefOffset.m require height of actual ellipsoid or the height above the ellipsoid? I'd like to compute a spatial gradient, in 3-D for a point 200km below Earth's surface.
I couldn't find a clear example of a function that simply gave the distance between two points in 3-D when the point was near but not on Earth's surface.
I have access to Matlabv 2014a, with the Mapping Toolbox.

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