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
Artikel i vetenskaplig tidskrift, 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

Författare

Christoph Holst

Universität Bonn

David Schunck

Universität Bonn

Axel Nothnagel

Universität Bonn

Rüdiger Haas

Chalmers, Rymd- och geovetenskap, Onsala rymdobservatorium

Lars Wennerbäck

Chalmers, Rymd- och geovetenskap, Onsala rymdobservatorium

Henrik Olofsson

Chalmers, Rymd- och geovetenskap, Onsala rymdobservatorium

Roger Hammargren

Chalmers, Rymd- och geovetenskap, Onsala rymdobservatorium

Heiner Kuhlmann

Universität Bonn

Sensors

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

Vol. 17 1-21 1833

Drivkrafter

Hållbar utveckling

Ämneskategorier

Fysik

Geovetenskap och miljövetenskap

Fundament

Grundläggande vetenskaper

Infrastruktur

Onsala rymdobservatorium

DOI

10.3390/s17081833