Institut für Geodäsie und Geoinformation (IGG): Institut für Geodäsie und Geoinformation (IGG): Neuzugänge
Anzeige der Dokumente 21-40 von 105
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Automatische, hochaufgelöste 3D-Phänotypisierung von Trauben und Beeren der Weinrebe unter Feldbedingungen
Rose, Johann Christian (2020)<em>Pilzwiderstandsfähige Sorten (PIWI) </em>sind eine der Innovationen im Weinbau. Das Projekt <em>Novel Viticulture Systems for sustainable production and products (NoViSys)</em> kombiniert die PIWIs zur Effizienzsteigerung ... -
Analysis and mitigation of site-dependent effects in static and kinematic GNSS applications
Zimmermann, Florian (2020)Satellitensignale unterliegen auf ihrem Weg von der Satelliten- zur Empfangsantenne einer Vielzahl an Einflüssen die zu Abweichungen führen. Heutzutage stellen in vielen Anwendungsbereichen insbesondere die stationsspezifischen ... -
Improved area-based deformation analysis of a radio telescope’s main reflector based on terrestrial laser scanning
Holst, Christoph; Nothnagel, Axel; Blome, Martin; Becker, Philip; Eichborn, Malwin; Kuhlmann, Heiner (2015-03-14)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 laser scanner and by determining focal length ... -
Laser scanning based growth analysis of plants as a new challenge for deformation monitoring
Dupuis, Jan; Holst, Christoph; Kuhlmann, Heiner (2016-03-31)Nowadays, the areal deformation analysis has become an important task in engineering geodesy. Thereby, not only manmade objects are of high interest, also natural objects, like plant organs, are focused more frequently. ... -
Challenges and present fields of action at laser scanner based deformation analyses
Holst, Christoph; Kuhlmann, Heiner (2016-03-31)Due to improved laser scanning technology, laser scanner based deformation analyses are presently widespread. These deformation analyses are no longer based on individual points representing the deformation of an object ... -
Impact of spatial correlations on the surface estimation based on terrestrial laser scanning
Jurek, Tobias; Kuhlmann, Heiner; Holst, Christoph (2017-07-19)In terms of high precision requested deformation analyses, evaluating laser scan data requires the exact knowledge of the functional and stochastic model. If this is not given, a parameter estimation leads to insufficient ... -
Flächenhafte Deformationsanalysen mit terrestrischen und Nahbereichslaserscannern: eine Gegenüberstellung anhand von Beispielen
Holst, Christoph; Dupuis, Jan; Paulus, Stefan; Kuhlmann, Heiner (2014)Dieser Beitrag stellt einen Überblick über den Ablauf einer flächenhaften Deformationsanalyse basierend auf terrestrischen Laserscannern (TLS) dar, wobei speziell auf die Datenerfassung, Vorverarbeitung und Auswertung ... -
Magnetic Field Sensor Calibration for Attitude Determination
Klingbeil, Lasse; Eling, Christian; Zimmermann, Florian; Kuhlmann, Heiner (2014-05-29)The presented work aims to give an overview of different calibration methods for magnetic field sensors, which are used for attitude determination. These methods are applicable in the field without any additional equipment. ... -
Aiming at self-calibration of terrestrial laser scanners using only one single object and one single scan
Holst, Christoph; Kuhlmann, Heiner (2014-12-05)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. Consequently, the development of ... -
Biased and unbiased estimates based on laser scans of surfaces with unknown deformations
Holst, Christoph; Artz, Thomas; Kuhlmann, Heiner (2014-10-02)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 only disadvantageous at some applications, ... -
High-Precision Surface Inspection: Uncertainty Evaluation within an Accuracy Range of 15μm with Triangulation-based Laser Line Scanners
Dupuis, Jan; Kuhlmann, Heiner (2014-01-02)Triangulation-based range sensors, e.g. laser line scanners, are used for high-precision geometrical acquisition of free-form surfaces, for reverse engineering tasks or quality management. In contrast to classical tactile ... -
Automatic optimization of height network configurations for detection of surface deformations
Holst, Christoph; Eling, Christian; Kuhlmann, Heiner (2013-05-18)Levellings are performed to observe height changes of different epochs at discrete surveying points. A reliable estimation of surface deformations by a bivariate polynomial needs a sufficient configuration of the underlying ... -
Direct Georeferencing for Portable Mapping Systems: In the Air and on the Ground
Klingbeil, Lasse; Eling, Christian; Heinz, Erik; Wieland, Markus (2017-11)During the last few years, the acquisition of geometric information about objects by using a moving sensor platform has gained increasing popularity in the surveying community. A large number of companies offer vehicle-based ... -
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Modeling the Beam Deflection of a Gantry Crane under Load
Holst, Christoph; Burghof, Martin; Kuhlmann, Heiner (2014-02)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 depends on the weight of the loaded container ... -
Estimation of Focal Length Variations of a 100-m Radio Telescope's Main Reflector by Laser Scanner Measurements
Holst, Christoph; Zeimetz, Philipp; Nothnagel, Axel; Schauerte, Wolfgang; Kuhlmann, Heiner (2012-08)Due to gravitation, the main reflector of a radio telescope underlies a deformation which causes a change in focal length depending on the variations of the elevation angle of the telescope. In order to estimate these ... -
Atmospheric refraction and turbulence in VLBI data analysis
Halsig, Sebastian (2018)The progress in further improving the quality of results derived by space-geodetic techniques observing in the radio frequency domain, such as Very Long Baseline Interferometry (VLBI) or Global Navigation Satellite Systems ... -
Hochwasserrisiko und Immobilienwerte: Zum Einfluss der Lage in überschwemmungs-gefährdeten Gebieten sowie zu den Folgen von Überschwemmungsereignissen auf den Verkehrswert von Wohnimmobilien
Kropp, Sebastian Alexander (2017)Aufgrund des fortschreitenden Klimawandels und dem weiteren Anstieg der Flächenversiegelung ist auch in Deutschland mit einer Zunahme extremer Hochwasserereignisse zu rechnen. Ein Anstieg des Hochwasserrisikos stellt ... -
Exploring urban structure to approach energy optimization: The case of residential settlement development in Dhaka city, Bangladesh
Sikder, Sujit Kumar (2017)The concept of energy optimization in urban development has the potential to address many urban challenges besides local energy concerns. Past research has attempted to combine the cross-cutting issues of urban planning, ... -
Conceptualizing the concept of disaster resilience: a hybrid approach in the context of earthquake hazard: case study of Tehran City , Iran
Asadzadeh, Asad (2017)From the natural perspective, disaster resilience is defined as the ability of a system or community to resist, mitigate, respond, and recover from the effects of hazards in efficient and timely manner. How urban communities ...