Institut für Geodäsie und Geoinformation (IGG): Browsing Institut für Geodäsie und Geoinformation (IGG) by Title
Now showing items 21-40 of 105
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Calibration of Terrestrial Laser Scanners: Kalibrierung terrestrischer Laserscanner
Holst, Christoph; Neuner, Hans; Wieser, Andreas; Wunderlich, Thomas; Kuhlmann, Heiner (2016)The calibration of a laser scanner is necessary to reduce systematic errors in the acquired point cloud. Furthermore, calibrating laser scanners is motivated by the need of users to access up-to-date quality information. ... -
Can we model the effect of observed sea level rise on tides?
Schindelegger, Michael; Green, Mattias; Wilmes, Sophie-Berenice; Haigh, Ivan (2018-06-07)The link between secular changes in the lunar semidiurnal ocean tide (M2) and relative sea level rise is examined based on numerical tidal modeling and the analysis of long-term sea level records from Europe, Australia, ... -
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 ... -
Coestimating long-term temporal signals to reduce the aliasing effect in parametric geodetic mean dynamic topography estimation
Brockmann, Jan Martin; Borlinghaus, Moritz; Neyers, Christian; Schuh, Wolf-Dieter (2022-06-16)The geodetic estimation of the mean dynamic ocean topography (MDT) as the difference between the mean of the sea surface and the geoid remains, despite the simple relation, still a difficult task. Mainly, the spectral ... -
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 ... -
Convex optimization for inequality constrained adjustment problems
Roese-Koerner, Lutz Rolf (2015)Whenever a certain function shall be minimized (e.g., a sum of squared residuals) or maximized (e.g., profit) optimization methods are applied. If in addition prior knowledge about some of the parameters can be expressed ... -
Dealing with systematic laser scanner errors due to misalignment at area-based deformation analyses
Holst, Christoph; Medić, Tomislav; Kuhlmann, Heiner (2018-03-07)The ability to acquire rapid, dense and high quality 3D data has made terrestrial laser scanners (TLS) a desirable instrument for tasks demanding a high geometrical accuracy, such as geodetic deformation analyses. However, ... -
Design of frequency selective filters for non-equispaced data
Schuh, Wolf-Dieter; Franken, Jessica; Brockmann, Jan Martin; Esch, Christina; Köhler, Joël; Gutjahr, Karlheinz (2018-07-22)Modern sensors and satellite missions deliver huge data sets and long time series of observations. In the most cases equispaced time series are collected. Filtering of time series is a standard task in data analysis. ... -
Determination of sub-daily earth rotation parameters from VLBI observations
Artz, Thomas (2015)The work presented deals with the determination of sub-daily Earth Rotation Parameters (ERPs) from Very Long Baseline Interferometry (VLBI) observations. Monitoring and interpreting the Earth's rotation variations in general ... -
Development of a one-step 3D approach for the phase unwrapping process in a D-InSAR stack based on SBAS interferograms
Esch, Christina (2020)Differential Interferometric Synthetic Aperture Radar (D-InSAR) is a unique technique to detect and map deformations of the Earth's surface over large temporal and spatial scales. Processing a whole stack of multitemporal ... -
Development, Calibration and Evaluation of a Portable and Direct Georeferenced Laser Scanning System for Kinematic 3D Mapping
Heinz, Erik; Eling, Christian; Wieland, Markus; Klingbeil, Lasse; Kuhlmann, Heiner (2016-01-21)In recent years, kinematic laser scanning has become increasingly popular because it offers many benefits compared to static laser scanning. The advantages include both saving of time in the georeferencing and a more ... -
Digital filtering algorithms for decorrelation within large least squares problems
Siemes, Christian (2012)The GOCE (Gravity Field and steady-state Ocean Circulation Explorer) mission is dedicated to the determination of the Earth's gravity field. During the mission period of at least one year the GOCE satellite will collect ... -
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 ... -
Effects on the Geodetic-VLBI Observables Due to Polarization Leakage in the Receivers
Roy, Alessandra (2011)Geodetic VLBI delivers baseline length and Earth orientation parameter measurements, which offer the most viable and precise way to study Earth crustal and core dynamics and to support space navigation. The precision of ... -
Empirical stochastic model of detected target centroids: Influence on registration and calibration of terrestrial laser scanners
Medić, Tomislav; Holst, Christoph; Janssen, Jannik; Kuhlmann, Heiner (2019-03-22)The target-based point cloud registration and calibration of terrestrial laser scanners (TLSs) are mathematically modeled and solved by the least-squares adjustment. However, usual stochastic models are simplified to a ... -
Entwicklung einer direkten Georeferenzierungseinheit zur Positionsund Orientierungsbestimmung leichter UAVs in Echtzeit
Eling, Christian (2016)Seit einigen Jahren werden im Bereich der Geodäsie immer häufiger auch Unmanned Aerial Vehicles (UAVs) als kinematische Trägerplattformen eingesetzt. Dazu werden diese mit objekterfassender Sensorik, wie z.B. Digitalkameras ... -
Entwicklung eines Kalman-Filters zur Bestimmung kurzzeitiger Variationen des Erdschwerefeldes aus Daten der Satellitenmission GRACE
Kurtenbach, Enrico (2011)Eine wichtige Beobachtungsgröße bei der Erforschung des Erdsystems stellt das Gravitationsfeld der Erde dar, dessen zeitliche Variationen mit der Satellitenmission GRACE (Gravity Recovery And Climate Experiment) erstmals ... -
Entwicklungsperspektiven metropolitaner Peripherien im Rahmen stadtregionaler Planungs- und Entwicklungsprozesse am Beispiel Nordrhein-Westfalen
Leber, Nils (2013)Die zurückliegenden Dekaden haben sich durch eine enorme Zunahme der Entwicklungsdynamiken von gesellschaftlichen, ökonomischen und ökologischen und daraus hervorgehend räumlichen Entwicklungen charakterisiert. Ein prägnantes ... -
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 ... -
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, ...