Browsing by Subject "GNSS"

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  • Kersten, Tobias; Ren, Le; Schön, Steffen (Noordwijk, The Netherlands : Esa ESTEC, 2018)
    Efficient and economic guidance of inland vessels relies on a continuous, available, reliable and precise GNSS navigation solution. Hence, below other side effects, this is especially critical when passing beneath bridges ...
  • Tengen, Dieter; Riedel, Anika; Riedel, Björn; Gerke, Markus; Niemeier, Wolfgang (Hannover : Institutionelles Repositorium der Leibniz Universität Hannover, 2019)
    Die Ableitung und Modellierung von vertikalen Landbewegungen an der deutschen Nord- und Ostseeküste hat u.a. das Ziel, den Einfluss der Landsenkung bzw. –hebung an der Küste von scheinbaren Pegelanstiegen trennen zu können. ...
  • Kersten, Tobias; Schön, Steffen (Piscataway, NJ : IEEE, 2012)
    The Institut für Erdmessung (IfE) is an official IGS calibration institution, calibrating phase center variations (PCV) for receiver antennae routinely in the field, using the actual GNSS satellite signals in space. Current ...
  • Kröger, Johannes; Breva, Yannick; Kersten, Tobias; Kersten, Tobias; Schön, Steffen (Stuttgart : Frontiers of Geodetic Science, 2019-09-17)
    Eine genaue Positionsbestimmung mittels GNSS basiert auf einem präzisen Signalempfang. Im Falle von Trägerphasenmessung stellt ein gleichförmiger Kugelstrahler eine ideale Empfängerantenne dar. Abweichungen von dieser ...
  • Kersten, Tobias (München : C.H. Beck, 2014-12)
    Die globale Positionierung, Navigation sowie Zeit- und Frequenzübertragung [positioning, navigation and timing] (PNT) ist in der heutigen Gesellschaft zu einem integralen Bestandteil des täglichen Lebens geworden, so dass ...
  • Kersten, Tobias; Kröger, Johannes; Breva, Yannick; Schön, Steffen (München : European Geosciences Union, 2019-04-08)
    Precise GNSS applications like positioning, navigation and timing (PNT) as well as troposphere studies require consistent and accurate calibration values of receiver antennas. Nowadays, they are available by several ...
  • Kröger, Johannes; Breva, Yannick; Kersten, Tobias; Schön, Steffen (Zürich : European Space Agency (ESA) and ETH Zürich, 2019-09-04)
    GNSS are widely used for positioning, navigation and timing (PVT). The quality of results depends on the antenna in use and the capability to take antenna specific effects into account. The most prominent corrections are ...
  • Breva, Yannick; Kröger, Johannes; Kersten, Tobias; Schön, Steffen (Zürich : European Space Agency (ESA) and ETH Zürich, 2019-09-04)
    Besides antenna phase center corrections (PCC) for carrier phase measurements, which have to be considered for precise GNSS application, also codephase variations (CPV) exist. These are antenna dependent delays of the code ...
  • Kersten, Tobias; Kobe, Martin; Gabriel, Gerald; Timmen, Ludger; Schön, Steffen; Vogel, Detlef (Berlin : De Gruyter, 2017)
    The research project SIMULTAN applies an advanced combination of geophysical, geodetic, and modelling techniques to gain a better understanding of the evolution and characteristics of sinkholes. Sinkholes are inherently ...
  • Koch, Igor; Shabanloui, Akbar; Flury, Jakob; Müller, Jürgen (2017-07-30)
    In this study, two approaches for the determination of total non-gravitational accelerations acting on GRACE were investigated. To investigate two approaches, GRACE Level-1B data including accelerometer sensor data, GNSS ...
  • 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 ...
  • Nadarajah, Nandakumaran; Paffenholz, Jens-André; Teunissen, Peter J.G. (Basel : MDPI AG, 2014-07-17)
    Direct geo-referencing is an efficient methodology for the fast acquisition of 3D spatial data. It requires the fusion of spatial data acquisition sensors with navigation sensors, such as Global Navigation Satellite System ...
  • Schön, Steffen; Brenner, Claus; Alkhatib, Hamza; Coenen, Max; Dbouk, Hani; Garcia-Fernandez, Nicolas; Fischer, Colin; Heipke, Christian; Lohmann, Katja; Neumann, Ingo; Nguyen, Uyen; Paffenholz, Jens-André; Peters, Torben; Rottensteiner, Franz; Schachtschneider, Julia; Sester, Monika; Sun, Ligang; Vogel, Sören; Voges, Raphael; Wagner, Bernardo (Basel : MDPI AG, 2018)
    Global Navigation Satellite Systems (GNSS) deliver absolute position and velocity, as well as time information (P, V, T). However, in urban areas, the GNSS navigation performance is restricted due to signal obstructions ...
  • Schön, Steffen; Kersten, Tobias (Washington D.C. : American Geophysical Union, 2013)
    One important part for ensuring the high quality of the International GNSS Service's (IGS) products is the collection and publication of receiver - and satellite antenna phase center variations (PCV). The PCV are crucial ...
  • Kersten, Tobias; Schön, Steffen; Weinbach, Ulrich (Piscataway, NJ : IEEE, 2012)
    Group Delay Variations (GDVs) are azimuth and elevation dependent code delays that can limit the accuracy of the GNSS code observables. This contribution focuses on the GDV determination and discusses several solutions ...
  • 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 ...
  • Kersten, Tobias; Schön, Steffen (Cham : Springer, 2016)
    Evaluating the impact of receiver antenna phase centre corrections (PCCs) in geodetic positioning and timing applications in a general way is quite challenging, because several estimation concepts, implementation philosophies ...
  • Kersten, Tobias; Schön, Steffen (Piscataway, NJ : IEEE, 2010)
    With the Hannover concept of absolute field calibration of GNSS antennae the determination of receiver antenna Phase Center Variations (PCV) can be done routinely for the GPS and GLONASS L1 and L2 frequencies, respectively. ...
  • Kersten, Tobias; Weise, Adelheid; Timmen, Ludger; Gabriel, Gerald; Schön, Steffen; Vogel, Detlef (Hannover : Institutionelles Repositorium der Leibniz Universität Hannover, 2019)
    Senkungsvorgänge der Erdoberfläche stellen vor allem in urbanen Gebieten eine deutliche Gefährdung dar. Oftmals sind diese Senkungen durch Massenvariationen im Untergrund verursacht und führen zu langsamen, aber auch ...
  • 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 ...