Geodetic Deformation Monitoring: From Geophysical to by Fernando Sansò, Antonio J. Gil

By Fernando Sansò, Antonio J. Gil

Geodesy is the technological know-how facing the selection of the placement of issues in house, the form and gravity box of the Earth and with their time adaptations. This booklet collects 36 chosen papers from the overseas Symposium on Geodetic Deformation tracking held in Jaén (Spain) from seventeenth to nineteenth March 2005. It includes a strong evaluate of theoretical concerns, versions and results.

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Extra resources for Geodetic Deformation Monitoring: From Geophysical to Engineering Roles (International Association of Geodesy Symposia)

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As for the objective to determine from geodetic measurements the kinematic/deformation parameters, there are a number of questions to consider. These relate to the feasibility of all the modeling parts of a kinematical or deformation process. Sometimes the results of deformation studies may be more confusing than enlightening (Oezener et al, 2003). Associated questions can be: (1) How feasible is the rate and the scale of an expected motion or deformation? The rates are usually estimated on the basis of experience, so it may be difficult to reveal the real ones using few or an insufficient data coverage or even using overdetermined evaluation models with large data sets.

The normalizing constant then reads: ˆ) f (D ³ ³ ³ f (Dˆ ', W, p)f (' p)f (W)f (p)d'dWdp (8) 'Wp n ª *( n  a ) º § 1 · 2 1 *( n  a ) 2 » ˜ «¨  G( ' ) ¸ «© 2Sk ¹ 1 ( n a ) n a ) » ( C 2 2M 2 N 2 ¼» ¬« In the present framework, just to perform the analytical integrations of both the normalizing constant and the posterior marginal density functions, we suppose: k (9) V 2p kVˆ 02 W This hypothesis simply relates in a useful way the prior information precision V 2p and the (pseudo-) n ª º exp(LW) » n 2 a 1 § 1 · 2 1 F « ˜ ¨ W exp(GW)  ¸ 1 2 «© 2Sk ¹ » 2 2 C ¬« ¼» observations precision Vˆ 02 and does not introduce any theoretical limitation about the applicability of the new testing procedure.

Bowin 1983) and uses only observed geodetic data and coefficients of global gravity field models. This approach has the advantage of being independent of prior knowledge about the site, simple and of low cost. The aim of this study is to contribute to the means by which we can estimate the rate and the geographical scale of a possible motion/deformation assuming that the depth of the causing “sources” of a motion/deformation is related to a topographical area of such size that the motion is expected to be sensed through the measurements.

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