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Michael Loesler
Type of contribution: poster

Coordinate Based Bundle Adjustment Advanced Network Adjustment Model for Polar Measurement Systems.

Michael L{"o}sler, Frankfurt University of Applied Sciences - Laboratory for Industrial Metrology Cornelia Eschelbach, Frankfurt University of Applied Sciences - Laboratory for Industrial Metrology R{"u}diger Haas, Chalmers University of Technology, Onsala Space Observatory

To fulfil the requirements on local-ties formulated by GGOS, high precision instruments and rigorous uncertainty propagation are necessary. To evaluate the results of e. g. high performance total stations or laser trackers, the accuracy-limiting parameters of the measurement process have to be quantified and projected onto an uncertainty model. Using the generally and interdisciplinary accepted Guide to the Expression of Uncertainty in Measurement (GUM) a transparent and traceable stochastic model can be derived. A Cartesian coordinate based bundle adjustment is suggested, to integrate the local measurements into a global context, avoiding gravitational influences. The included comprehensive uncertainty model is based on a specific geometric model of a polar measurement system and takes instrument specific and target dependent error parameters into account.