Terrestrial Laser Scanner Two-Face Measurements for Analyzing the Elevation-Dependent Deformation of the Onsala Space Observatory 20-m Radio Telescope’s Main Reflector in a Bundle Adjustment
Journal article, 2017

© 2017 by the authors. Licensee MDPI, Basel, Switzerland. For accurate astronomic and geodetic observations based on radio telescopes, the elevation-dependent deformation of the radio telescopes’ main reflectors should be known. Terrestrial laser scanning has been used for determining the corresponding changes of focal lengths and areal reflector deformations at several occasions before. New in this publication is the situation in which we minimize systematic measurement errors by an improved measurement and data-processing concept: Sampling the main reflector in both faces of the laser scanner and calibrating the laser scanner in situ in a bundle adjustment. This concept is applied to the Onsala Space Observatory 20-m radio telescope: The focal length of the main reflector decreases by 9.6 mm from 85° to 5° elevation angle. Further local deformations of the main r eflector are not detected.

radio telescope

bundle adjustment

terrestrial laser scanning

deformation analysis

very long baseline interferometry

calibration

parameter estimation

Author

Christoph Holst

University of Bonn

David Schunck

University of Bonn

Axel Nothnagel

University of Bonn

Rüdiger Haas

Chalmers, Earth and Space Sciences, Onsala Space Observatory

Lars Wennerbäck

Chalmers, Earth and Space Sciences, Onsala Space Observatory

Henrik Olofsson

Chalmers, Earth and Space Sciences, Onsala Space Observatory

Roger Hammargren

Chalmers, Earth and Space Sciences, Onsala Space Observatory

Heiner Kuhlmann

University of Bonn

Sensors

1424-8220 (ISSN) 1424-3210 (eISSN)

Vol. 17 1833 1-21 1833

Driving Forces

Sustainable development

Subject Categories

Physical Sciences

Earth and Related Environmental Sciences

Roots

Basic sciences

Infrastructure

Onsala Space Observatory

DOI

10.3390/s17081833

More information

Created

10/7/2017