• Experimental determination of the longitudinal pier stiffness of a long railway viaduct 

  Wenner, M.; Meier, T.; Wedel, F.; Schacht, G.; Marx, S. (Lausanne : Frontiers Media S.A., 2019)

  Track–bridge interaction plays a decisive role in the design of long railway bridges due to the high braking and acceleration forces that occur and the fact that the continuous rail is attached to the superstructure. A ...
• Scaling Effects in Spatial Multi-Criteria Decision Aggregation in Integrated River Basin Management 

  Taha, Rania; Dietrich, Jörg; Dehnhardt, Alexandra; Hirschfeld, Jesko (Basel : MDPI, 2019)

  For river basin management plans (RBMPs), measures are aggregated from smaller spatial units (e.g., water bodies) to the catchment or basin scale. River basin management plans measures in integrated management are evaluated ...
• Validation of Improved Sampling Concepts for Offshore Wind Turbine Fatigue Design 

  Hübler, Clemens; Weijtjens, Wout; Gebhardt, Cristian G.; Rolfes, Raimund; Devriendt, Christof (Basel : MDPI, 2019)

  Fatigue damage is a design-driving phenomenon for substructures of offshore wind turbines. However, fatigue design based on numerical simulations is quite uncertain. One main reason for this uncertainty is scattering ...
• Kombination von klassischen Gravimetern mit Quantensensoren 

  Schilling, Manuel (Hannover : Leibniz Universität Hannover, 2019)

  Die Geräteentwicklung im Bereich der Gravimetrie der vergangenen Jahrzehnte zeichnete sich in erster Linie durch eine Digitalisierung der Datenerfassung und -verarbeitung sowie einer Reduktion instrumenteller Fehlerquellen ...
• Relative gravimeter calibration system for high accurate applications 

  Timmen, Ludger; Schilling, Manuel; Falk, Reinhard; Lothhammer, Alexander; Gabriel, Gerald; Vogel, Detlef (München : European Geosciences Union, 2018-04-11)

  A best possible accuracy for the calibration of relative gravimeters is often required to achieve the objectives of state-geodetic and geo-scientific surveys. A scale inaccuracy for relative gravimeters of 1·10-4 is striven ...
• Direct geo-referencing of 3D point clouds with 3D positioning sensors 

  Paffenholz, Jens-André (München : Verlag der Bayerischen Akademie der Wissenschaften, 2012)

  A broad range of scientific, administrative, industrial and private users demand for detailed three dimensional (3D) spatial data with typical applications in, for instance, as-built documentation, construction engineering, ...
• A proposal for an orbit determination procedure for short arcs of LEO with GPS SST observations 

  Shabanloui, Akbar; Ilk, Karl Heinz (2005-10-05)

  Precise orbit determination of LEO (Low Earth Orbiter) satellites plays an important role in satellite geodesy. In this work, a technique for a precise determination of short arcs (ca. 30 minutes) of low flying satellites ...
• Zero difference geometrical precise orbit determination of low flying satellites with GPS-SST observations 

  Shabanloui, Akbar; Ilk, Karl Heinz (2006-10-11)

  SST (Satellite to Satellite Tracking) observations between GPS and LEO (Low Earth Orbiter) play an important role to determine precise 3D orbits of LEO satellites. The Zero difference technique has been proven to be very ...
• Geometrical LEO Precise Orbit Determination (POD) with only sequential time differenced GPS SST carrier phase observations 

  Shabanloui, Akbar; Ilk, Karl Heinz (2007-04-16)

  High-low GPS LEO (Low Earth Orbiter) SST (Satellite to Satellite Tracking) observations play an important role to determine geometrical, precise, 3D orbits of LEO satellites. The ambiguity parameters in the Zero difference ...
• Kinematical LEO Orbit Determination with sequential time differenced GPS SST carrier phase observations 

  Shabanloui, Akbar (2007-04-16)

  SST (Satellite to Satellite Tracking) observations between GPS and LEO (Low Earth Orbiter) play an important role for the determination of precise orbits of LEO satel- lites. These precise orbits are indispensable within ...
• A new approach for an integrated kinematic-dynamic orbit determination of low flying satellites based on GNSS observations 

  Shabanloui, Akbar (2007-09-26)

  Very precise kinematic or dynamic orbits based on measurements of the Global Navigation Satellite Systems (GNSS) are required to study sea level change and ice cover variations based on the observations of altimetry ...
• From pure kinematical to reduced kinematical LEO orbit determination 

  Shabanloui, Akbar (2009-09-23)

  The geometrical point-wise satellite positions can be derived by GNSS analysis techniques. The different precise point positioning techniques based on GNSS observations will be designated as geometric orbit determination ...
• A New Approach for Pure Kinematical and Reduced Kinematical Determination of a LEO Orbit based on GNSS Observations 

  Shabanloui, Akbar (2009-08-31)

  The geometrical point-wise satellite positions can be derived by GNSS analysis techniques. The different precise point positioning techniques will be designated as geometric orbit determination methods. In the Geometrical ...
• Pure Geometrical Precise Orbit Determination of a LEO Based on GNSS Carrier Phase Observations 

  Shabanloui, Akbar; Ilk, Karl Heinz (2009-08-31)

  The interest in a precise orbit determination of Low Earth Orbiters (LEOs) especially in pure geometrical mode using GNSS observations has been grown rapidly. Conventional GNSS-based strategies rely on the GNSS observations ...
• An Overview on GNSS Radio Occultation 

  Shabanloui, Akbar (2010-07-13)

  An overview on GNSS Radio Occultation (GNSS-RO) technique and its application in geodesy and atmospheric research was presented at the Institute of Astronomical and Physical Geodesy (APMG), University of Bonn in Germany, ...
• Geometrical and Kinematical Precise Orbit Determination of GOCE 

  Shabanloui, Akbar (2010-10-07)

  The geometrical point-wise Low Earth Orbiters (LEO) positions can be derived by Global Navigation Satellite System (GNSS) analysis techniques. The different precise point positioning techniques based on GNSS observations ...
• How important is the dynamical information in determination of LEO orbits 

  Shabanloui, Akbar; Kusche, Jürgen; Ilk, Karl Heinz (2010-06-28)

  The interest in a precise orbit determination of Low Earth Orbiters (LEOs) using GNSS observations to recover of the Earth's gravity field has been grown rapidly. With the advent of precise orbit and clock products at ...
• Improved GNSS navigation with chip-scale atomic clocks 

  Krawinkel, Thomas (München : Verlag der Bayerischen Akademie der Wissenschaften, 2018)

  The determination of position and time as well as navigation by means of a Global Navigation Satellite System (GNSS) is always based on one-way range measurements between satellites and receiver. Synchronization of their ...
• Phase Center Corrections for new GNSS-Signals 

  Kröger, Johannes; Breva, Yannick; Kersten, Tobias; Schön, Steffen (2019-04-09)

  Phase center corrections (including corrections for phase center offset and phase center variations) are nowadays mandatory for high accuracy GNSS applications. Currently, only L1- and L2 frequencies for GPS and GLONASS ...
• Validation of Phase Center Corrections for new GNSS-Signals obtained with absolute antenna calibration in the field 

  Breva, Yannick; Kröger, Johannes; Kersten, Tobias; Schön, Steffen (2019-04-09)

  For high accuracy GNSS applications it is necessary to take phase center corrections (PCC) into account. At the moment PCC from chamber calibrations for various signals are available, however GPS L5 as well as Galileo PCC ...

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