Improved area-based deformation analysis of a radio telescope's main reflector based on terrestrial laser scanning

C Holst, A Nothnagel, M Blome, P Becker… - Journal of applied …, 2015 - degruyter.com
The main reflectors of radio telescopes deform due to gravitation when changing their
elevation angle. This can be analyzed by scanning the paraboloid surface with a terrestrial …

Terrestrial laser scanner two-face measurements for analyzing the elevation-dependent deformation of the onsala space observatory 20-m radio telescope's main …

C Holst, D Schunck, A Nothnagel, R Haas… - Sensors, 2017 - mdpi.com
For accurate astronomic and geodetic observations based on radio telescopes, the
elevation-dependent deformation of the radio telescopes' main reflectors should be known …

A VLBI delay model for gravitational deformations of the Onsala 20 m radio telescope and the impact on its global coordinates

A Nothnagel, C Holst, R Haas - Journal of Geodesy, 2019 - Springer
Deformations of the reflectors of radio telescopes used in geodetic and astrometric VLBI
observations belong to the class of systematic error sources which affect the estimated …

Aiming at self-calibration of terrestrial laser scanners using only one single object and one single scan

C Holst, H Kuhlmann - Journal of applied geodesy, 2014 - degruyter.com
When using terrestrial laser scanners for high quality analyses, calibrating the laser scanner
is crucial due to unavoidable misconstruction of the instrument leading to systematic errors …

Biased and unbiased estimates based on laser scans of surfaces with unknown deformations

C Holst, T Artz, H Kuhlmann - Journal of applied geodesy, 2014 - degruyter.com
The estimates based on laser scans of surfaces with unknown deformations are biased and
not reproducible when changing the scanning geometry. While the existence of a bias is …

A constraint-based parameterization technique for B-spline surfaces

C Harmening, H Neuner - Journal of Applied Geodesy, 2015 - degruyter.com
Deformation analysis is one of the classical tasks in engineering geodesy. The development
of the laser scanner has changed the data acquisition as well as the analysis strategy; …

Including virtual target points from laser scanning into the point-wise rigorous deformation analysis at geo-monitoring applications

L Raffl, C Holst - 5th Joint International Symposium on Deformation …, 2023 - riunet.upv.es
[EN] We present a method to include virtual target points from laser scanning into the point-
based rigorous deformation analysis to derive precise 3D deformation vectors. This method …

Modeling the beam deflection of a gantry crane under load

C Holst, M Burghof, H Kuhlmann - Journal of surveying engineering, 2014 - ascelibrary.org
Gantry cranes load and unload containers from container ships. To ensure safety and
operation, the deflection of their main beams under load should be analyzed. This deflection …

A complete VLBI delay model for deforming radio telescopes: the Effelsberg case

T Artz, A Springer, A Nothnagel - Journal of Geodesy, 2014 - Springer
Deformations of radio telescopes used in geodetic and astrometric very long baseline
interferometry (VLBI) observations belong to the class of systematic error sources which …

[图书][B] Modellbildungen zur Signalweg-und in-situ Referenzpunktbestimmung von VLBI-Radioteleskopen

M Lösler - 2021 - search.proquest.com
Die Erde befindet sich in einem kontinuierlichen Wandel, der aus verschiedenen
variierenden dynamischen Prozessen und einwirkenden Kräften resultiert. Die globale …