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According to NIST again, the "standard acceleration of gravity", g_n, is
defined to be exactly g_n = 9.806 65 m s-2
The local acceleration of gravity, g, varies noticeably from this value,
due to rotation and a non-spherical earth. Perhaps the terms "local
free fall acceleration" and "standard free fall acceleration" would be
better terms, since g at any given location include not only
gravitational effects but also a correction for the rotation of the
earth.