By Zdenek Martinec

ISBN-10: 3540644628

ISBN-13: 9783540644620

ISBN-10: 3540697853

ISBN-13: 9783540697855

This ebook bargains a simultaneous remedy of the speculation and numerical software of boundary-value difficulties with regards to the selection of an exact geoid from gravimetric facts. the next topics are mentioned: topographical results and their computations in specific gravimetric geoid decision, the downward continuation of a harmonic functionality, Stokes' challenge formulated on an ellipsoid of revolution, round Stokes' challenge with ellipsoidal corrections concerned with boundary stipulations for an anomalous capability, and the altimetry-gravimetry boundary-value challenge. the reply to a few medical difficulties, raised and mentioned in geodetic literature during the last years, are available the following. The booklet is meant for scientists and complex graduate students.

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**Sample text**

19) and its magnitude is equal to Ix t = 16 × 10-3m. 20) We can conclude that the center of mass of the Helmert body is shifted about 16 m m from the center of mass of the actual Earth's body in the case when the Helmert condensation is performed according to principle of conservation of topographical masses. 2 P r i n c i p l e of m a s s - c e n t e r c o n s e r v a t i o n Now, let us turn to another way of the condensation of topographical masses and assume that they are condensed according to principle of mass-center conservation.

60) in an immediate neighbourhood of the computation point. This difference depends on a height of the computation point; the larger the height of the computation point, the larger the difference between these kernels, and therefore, the stronger is the indirect topographical effect on potential. ,'" °,, -- E-7 ~ i~.. i ~ ~l/r~-i t~ill i l~t, I 1E-4 1E-3 1E-2 IE-1 1E+0 1E-4 angular distance (degree) 1 E+2 IE+1 ~ 1E-3 1E-2 1E-1 tE+O angular distance (degree) '~,-. ,9. = . ltl] tE-4 1E-3 1E-2 IIIIIII 1E-1 1E+O angular distance (degree) The integration kernels for the indirect and direct topographical effects grid step size rather than that with a sparse grid size.

T =" 698 when /'/max = 53530 metres, and jco,,t - 10158 when H,~,x = 5353 metres. W e have already learnt that the actual critical numbers are jz~o "- 800 and j ~ o - 10500, respectively. 59) estimates jz~o quite well. 8 Different approximations leading to the fundamental equation of physical geodesy There are at least three approximate approaches how to convert the Stokes twoboundary-value problem to the regular Stokes problem. 47) in terms of a condition referred to one boundary only, the Earth's surface or the geoid.

### Boundary-Value Problems for Gravimetric Determination of a Precise Geoid by Zdenek Martinec

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