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Precise geoid estimation in the Brennero area

Barzaghi R., Borghi A., Kuehtreiber N., Sona G.

Reports on Geodesy

2003

z. 2/65

279-288

The geoid estimation procedure in the Brennero area was divided in two steps. A data analysis was firstly performed to define possible data onconsistency and deficiencies. Then a gravimetric geoid was estimated according to the well known "remote-restore" procedure. Different techniques to account for the topographic signal were applied and the residual geoid estimate has been computed using Least Squares Collocation (LSC) and Fast Collocation. EGM96 and GPM98CR global geopotential models were also tested to select the one giving the best fit for the long wavelength component of the geopotential field of the area. Geoid undulations were computed on a regular 3`x3` geographical grid in the area 46.25