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A discussion of the use of spherical approximation or no approximation in gravity field modeling with emphasis on unsolved problems in Least-Squares Collocation
[chapter]
2004
International Association of Geodesy Symposia
Preserved Fulltext
Spherical approximation is widely used in gravity field modeling, but it causes errors of the order of the flattening. Different methods for avoiding using this approximation when linearizing observation functionals are possible due to our improved knowledge of the gravity field and of the surface of the Earth. However a number of problems are not solved today, such as those related to the use of a Bjerhammar sphere in Least-Squares Collocation (LSC). If this concept is used, the associated
doi:10.1007/978-3-662-10735-5_25
fatcat:vfkalikqmzb43dliub52i4atym