caa a22 4500 465724051 CHVBK 20180323111725.0 cr unu---uuuuu 170327e19901001xx s 000 0 eng 10.1007/BF02316951 doi (NATIONALLICENCE)springer-10.1007/BF02316951 Pick Miloš Geophysical Institute, Czechosl. Acad. Sci., Prague aut On the normal gravity formulae [Elektronische Daten] [Miloš Pick] Summary: The determination of the normal gravity according to the formula $$\gamma = \gamma _0 + (\partial \gamma /\partial h)h$$ is not very presice and in some cases insufficient. In the present paper, two methods of the exact determination of the normal gravity for points lying on the reference ellipsoid or in outer space have been derived. The equations are valid up to the height of 10 km with an accuracy of 3×10−5 mgal. The numerical constants necessary to compute the normal gravity for the following gravity systems are introduced: Helmert 1901-9, Cassinis 1930, systems 1967, 1975, 1980, 1983. It is shown that an exact computation using Helmert's formula is not possible, and that deviations of around 1 mgal have to be expected. Academia, Publishing House of the Czechoslovak Academy of Sciences, 1990 Studia Geophysica et Geodaetica Kluwer Academic Publishers 34/4(1990-10-01), 289-312 0039-3169 34:4<289 1990 34 11200 https://doi.org/10.1007/BF02316951 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/BF02316951 text/html Onlinezugriff via DOI NATIONALLICENCE 100 1- Pick Miloš Geophysical Institute, Czechosl. Acad. Sci., Prague aut NATIONALLICENCE 773 0- Studia Geophysica et Geodaetica Kluwer Academic Publishers 34/4(1990-10-01), 289-312 0039-3169 34:4<289 1990 34 11200 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer