Determination of plumb line curvatures by astronomical and gravimetric methods

Details Determination of plumb line curvatures by astronomical and gravimetric methods Determination of plumb line curvatures by astronomical and gravimetric methods

Feb 1981

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981dplc.rept.....g&link_type=abstract

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Physics

Topography, Triangulation, Vertical Orientation, Elevation Angle, Geodesy, Trigonometry

Scientific paper

By taking terrain inclination data from topographic maps, as well as elevations and conservation estimates of horizontal gravity gradients, it is shown that the determination of actual plumb line corrections is practically impossible. By varying the data to within reasonable limits totally different estimates for the constituents of the plumb line correction are found. Taking into account the 30 second by 30 second estimates for mean elevations in the United States, it seems that the only fairly reliable estimate of actual plumb line corrections is obtained from topographic models. Also, normal plumb line curvature is considered.

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