Institut für Geodäsie und Geoinformation (IGG): Browsing Institut für Geodäsie und Geoinformation (IGG) by Title
Now showing items 52-71 of 105
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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 ... -
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 ... -
An improved global gravity field model from the GOCE mission: the time-wise release 6 model
Brockmann, Jan Martin; Schubert, Till; Mayer-Guerr, Torsten; Schuh, Wolf-Dieter (2019)The Gravity field and steady-state Ocean Circulation Explorer (GOCE) completed its science mission to observethe Earth’s gravity field in 2013. From the collected observations, gravity gradients and tracking ... -
An improved global gravity field model of the Earth derived from reprocessed GOCE observations with the time-wise approach
Brockmann, Jan Martin; Schubert, Till; Schuh, Wolf-Dieter; Kvas, Andreas; Mayer-Guerr, Torsten (2019)ESA's dedicated gravity field mission GOCE (Gravity field and steady-state Ocean Circulation Explorer) successfully completed its science operations in 2013 as the first Earth Explorer mission in orbit. In 2014, the fifth ... -
Investigations on the Influence of Antenna Near-field Effects and Satellite Obstruction on the Uncertainty of GNSS-based Distance Measurements
Zimmermann, Florian; Eling, Christian; Kuhlmann, Heiner (2016-03-31)Antenna near-field effects are one of the accuracy limiting factors on GNSS-based distance measurements. In order to analyse these influences, a measurement campaign at an EDM calibration baseline site with optimum GNSS ... -
Kommunales Kennzahlenmanagement am Beispiel von Vermessungs- und Katasterämtern in Nordrhein-Westfalen
Boele-Keimer, Gaby Alexandra (2008)Seit Mitte der 1990er Jahre werden in den kommunalen Verwaltungen in Deutschland Maßnahmen zur Verwaltungsmodernisierung entwickelt. Kennzahlen nehmen dabei als Instrument der Steuerungsunterstützung eine Schlüsselfunktion ... -
Konsistente Kombination von Schwerefeld, Altimetrie und hydrographischen Daten zur Modellierung der dynamischen Ozeantopographie
Becker, Silvia (2012)Die dynamische Ozeantopograpie als Differenz zwischen Meeresoberfläche und dem Geoid reflektiert charakteristische Merkmale der Ozeanzirkulation und stellt als gemessene Größe somit eine bedeutende Eingangsgröße in ... -
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. ... -
Lebensbilder im Wandel der preußischen Verwaltung des 19. und 20. Jahrhunderts: Eine Sammlung biographischer Miniaturen
Weiß, Erich (2014)Diese Schrift erscheint anlässlich des 75. Geburtstages von Prof. Dr.-Ing. Dr. h.c. mult. Erich Weiß am 13. September 2014. Am 13.9.2014 konnte Erich Weiß seinen 75. Geburtstag feiern. Anlass genug, Rückschau auf ... -
Lecture Notes from the Summer School of DFG SPP1257 Global Water Cycle: September 12-16, 2011, [Mayschoss/Ahr]
Eicker, Annette; Kusche, Jürgen (2013)In 2006, the German Research Association DFG had established the coordinated Priority Program SPP1257 Mass distribution and Mass Transport in the Earth System. According to DFG’s philosophy, SPP’s are meant to enable ... -
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. ... -
Management support by optimization-based trade-off analysis: the example of biodiesel crop production
Lautenbach, Sven; Volk, Martin; Strauch, Michael; Whittaker, Gerald; Seppelt, Ralf (2014)Modeling in decision support applications has often been used to compare outcomes between alternative scenarios of decision options. The introduction of optimization methods enable the comparison of a very large number of ... -
Methods for assimilating remotelysensed water storage changes into hydrological models
Schumacher, Maike (2016)Understanding physical processes within the water cycle is a challenging issue that requires merging information from various disciplines. The Gravity Recovery And Climate Experiment (GRACE) mission provides a unique ... -
Modeling of inhomogeneous spatio-temporal signals by least squares collocation
Schuh, Wolf-Dieter; Korte, Johannes; Schubert, Till; Brockmann, Jan Martin (2022-06-16)Through inverse modeling and adjustment techniques, the geodesists try to derive mathematical models from their measurements to get a better understanding of various processes in the system Earth. Sophisticated deterministic ... -
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 ... -
Möglichkeiten der Nutzung kinematischer Satellitenbahnen zur Bestimmung des Gravitationsfeldes der Erde
Löcher, Anno (2011)Die Extraktion von Schwerefeldinformation aus den Bahnverfolgungsdaten von Satelliten gehört zu den frühesten wissenschaftlichen Anwendungen der Weltraumtechnik. Die Ausrüstung von Satelliten mit GPSEmpfängern hat hier ... -
A new approach for a kinematic-dynamic determination of low satellite orbits based on GNSS observations
Shabanloui, Akbar (2008)A new approach for the integrated kinematical-dynamical orbit determination of low flying satellites based on high-low GPS-SST observations is proposed. These observations are code and carrier phase measurements between ... -
On high performance computing in geodesy: applications in global gravity field determination
Brockmann, Jan Martin (2015)Autonomously working sensor platforms deliver an increasing amount of precise data sets, which are often usable in geodetic applications. Due to the volume and quality, models determined from the data can be parameterized ... -
On Monte Carlo methods with applications to the current satellite gravity missions
Alkhatib, Hamza (2008)Large-scaled least squares problems require tailored numerical techniques to overcome the computational burden.For these types of problems iterative strategies are suitable because of their flexibility and effectiveness. ... -
On the theory and application of model misspecification tests in geodesy
Kargoll, Boris (2008)Many geodetic testing problems concerning parametric hypotheses may be formulated within the framework of testing linear constraints imposed on a linear Gauss-Markov model. Although geodetic standard tests for such problems ...