Radu Botezatu and Ruxandra Stefanescu
Abstract
The authors present the chart of the normal field reductions of gravity,
computed by means of the international formula, within the limits of 43°30'
and 48°30' latitude corresponding to the territory of the Romanian People's
Republic, for a 10" interval. After a preliminary calculation, the plotted
values have been balanced because the difference between two successive values
within a 10" interval could follow as accurately as possible the theoretic
variation law given by the working formula. Consequently, the approximations
due to calculations were for the greatest part eliminated, obtaining at the
same time, a more convenient chart for the interpolation of the reduction values
at latitudes intermediate to the plotted ones.
The chart is accompanied by a brief text in which the advantages of the initial
plotting of the reduction values of normal field for the construction of national
gravimetric maps, the mode of calculation of the chart as well as the accuracy
of the plotted values compared with those of similar charts with which they
partly coincide are shown. Some problems concerning the history and the prospects
of future communications of the international formula are also briefly reviewed.
For those particularly interested in such problems, bibliographical references
are given.