Classical Physical Geodesy

Helmut Moritz
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Helmut Moritz: Graz University of Technology, Institut für Navigation und Satellitengeodäsie

Chapter 6 in Handbook of Geomathematics, 2010, pp 125-158 from Springer

Abstract: Abstract Geodesy can be defined as the science of the figure of the Earth and its gravitational field, as well as their determination. Even though today the figure of the Earth, understood as the visible Earth’s surface, can be determined purely geometrically by satellites, using global positioning system (GPS) for the continents and satellite altimetry for the oceans, it would be pretty useless without gravity. One could not even stand upright or walk without being “told” by gravity where the upright direction is. So as soon as one likes to work with the Earth’s surface, one does need the gravitational field. (Not to speak of the fact that, without this gravitational field, no satellites could orbit around the Earth.) To be different from the existing textbooks, a working knowledge of professional mathematics can be taken for granted. In some areas where professors of geodesy are hesitant to enter too deeply, afraid of losing their students, some fundamental problems can be studied. Of course, there is a brief introduction to terrestrial gravitation as treated in the first few chapters of every textbook of geodesy, such as gravitation and gravity (gravitation plus the centrifugal force of the Earth’s rotation), the geoid, and heights above the ellipsoid (now determined directly by GPS) and above the sea level (a surprisingly difficult problem!). But then, as accuracies rise from 10 − 6 in 1960 (about

Keywords: Global Position System; Harmonic Function; Gravitational Field; Centrifugal Force; Analytical Continuation (search for similar items in EconPapers)
Date: 2010
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DOI: 10.1007/978-3-642-01546-5_6

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