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

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

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 deformati...

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Main Authors: Christoph Holst, David Schunck, Axel Nothnagel, Rüdiger Haas, Lars Wennerbäck, Henrik Olofsson, Roger Hammargren, Heiner Kuhlmann
Format: Article
Language:English
Published: MDPI AG 2017-08-01
Series:Sensors
Subjects:
terrestrial laser scanning
deformation analysis
parameter estimation
bundle adjustment
calibration
radio telescope
very long baseline interferometry
Online Access:https://www.mdpi.com/1424-8220/17/8/1833
id doaj-cdf8c2b749ad4989b141d9b07eba1379
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spelling doaj-cdf8c2b749ad4989b141d9b07eba13792020-11-25T01:02:12ZengMDPI AGSensors1424-82202017-08-01178183310.3390/s17081833s17081833Terrestrial 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 AdjustmentChristoph Holst0David Schunck1Axel Nothnagel2Rüdiger Haas3Lars Wennerbäck4Henrik Olofsson5Roger Hammargren6Heiner Kuhlmann7Institute of Geodesy and Geoinformation, University of Bonn, Bonn D-53115, GermanyInstitute of Geodesy and Geoinformation, University of Bonn, Bonn D-53115, GermanyInstitute of Geodesy and Geoinformation, University of Bonn, Bonn D-53115, GermanyOnsala Space Observatory, Chalmers University of Technology, Onsala SE-43992, SwedenOnsala Space Observatory, Chalmers University of Technology, Onsala SE-43992, SwedenOnsala Space Observatory, Chalmers University of Technology, Onsala SE-43992, SwedenOnsala Space Observatory, Chalmers University of Technology, Onsala SE-43992, SwedenInstitute of Geodesy and Geoinformation, University of Bonn, Bonn D-53115, GermanyFor 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 reflector are not detected.https://www.mdpi.com/1424-8220/17/8/1833terrestrial laser scanningdeformation analysisparameter estimationbundle adjustmentcalibrationradio telescopevery long baseline interferometry
collection DOAJ
language English
format Article
sources DOAJ
author Christoph Holst
David Schunck
Axel Nothnagel
Rüdiger Haas
Lars Wennerbäck
Henrik Olofsson
Roger Hammargren
Heiner Kuhlmann
spellingShingle Christoph Holst
David Schunck
Axel Nothnagel
Rüdiger Haas
Lars Wennerbäck
Henrik Olofsson
Roger Hammargren
Heiner Kuhlmann
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
Sensors
terrestrial laser scanning
deformation analysis
parameter estimation
bundle adjustment
calibration
radio telescope
very long baseline interferometry
author_facet Christoph Holst
David Schunck
Axel Nothnagel
Rüdiger Haas
Lars Wennerbäck
Henrik Olofsson
Roger Hammargren
Heiner Kuhlmann
author_sort Christoph Holst
title 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
title_short 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
title_full 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
title_fullStr 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
title_full_unstemmed 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
title_sort 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
publisher MDPI AG
series Sensors
issn 1424-8220
publishDate 2017-08-01
description 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 reflector are not detected.
topic terrestrial laser scanning
deformation analysis
parameter estimation
bundle adjustment
calibration
radio telescope
very long baseline interferometry
url https://www.mdpi.com/1424-8220/17/8/1833
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