Neitzel, Frank ; Ezhov, Nikolaj ; Petrovic, Svetozar (2019-05-22)
Spline approximation, using both values yi and xi as observations, is of vital importance for engineering geodesy, e.g., for approximation of profiles measured with terrestrial laser scanners, because it enables the consideration of arbitrary dispersion matrices for the observations. In the special case of equally weighted and uncorrelated observations, the resulting error vectors are orthogona...Determination of intensity-based stochastic models for terrestrial laser scanners utilising 3D-point clouds
Wujanz, Daniel ; Burger, Mathias ; Tschirschwitz, Felix ; Nietzschmann, Tassilo ; Neitzel, Frank ; Kersten, Thomas P. (2018-07-07)
Recent advances in stochastic modelling of reflectorless rangefinders revealed an inherent relationship among raw intensity values and the corresponding precision of observed distances. In order to derive the stochastic properties of a terrestrial laser scanner’s (TLS) rangefinder, distances have to be observed repeatedly. For this, the TLS of interest has to be operated in the so-called 1D-mod...