astrogeodetic datum orientation

astrogeodetic datum orientation

[‚as·trō‚jē·ə′ded·ik ′dad·əm ‚ȯr·ē·ən′tā·shən]
(geodesy)
Adjustment of the ellipsoid of reference for a particular datum so that the sum of the squares of deflections of the vertical at selected points throughout the geodetic network is made as small as possible.