Searched for: department%3A%22Earth%255C+Observation%255C+and%255C+Space%255C+Systems%22
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Noroozi, A. (author)
The trend of space technology developments is moving from high power consuming, bulky and costly systems towards low-power, small, low-cost and flexible systems. Thus, the spacecraft can benefit from multi-purpose and flexible systems which can be low-power and low-cost by employing new technology. One example of such system is a GNSS receiver...
doctoral thesis 2013
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Kuiper, J.M. (author)
Mass-spring and liquid dampers enable structural vibration control to attenuate single, coupled lateral and torsional vibrations in diverse structures. Out of these, the passively tuned liquid damper (TLD) class is wanted due to its broad applicability, extreme reliability, robustness, long life time and ease of manufacturability. In this PhD...
doctoral thesis 2012
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Giorgi, G. (author)
Attitude determination through the use of Global Navigation Satellite System (GNSS) signals is one of the many applications of satellite-based navigation. Multiple GNSS antennas installed on a given platform are used to provide orientation estimates, thus adding attitude information to the standard positioning service. Precise attitude estimates...
doctoral thesis 2011
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Rius, A. (author), Nogués-Correig, O. (author), Ribó, S. (author), Cardellach, E. (author), Oliveras, S. (author), Valencia, E. (author), Park, H. (author), Tarongi, J.M. (author), Camps, A. (author), Van der Marel, H. (author), Van Bree, R. (author), Altena, B. (author), Martín-Neira, M. (author)
The Global Navigation Satellite System Reflectometry (GNSS-R) concept was conceived as a means to densify radar altimeter measurements of the sea surface. Until now, the GNSS-R concept relied on open access to GNSS transmitted codes. Recently, it has been proposed that the ranging capability of the technique for ocean altimetric applications can...
journal article 2011
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D'Amico, S. (author)
Formation flying is commonly identified as the collective usage of two or more cooperative spacecraft to exercise the function of a single monolithic virtual instrument. The distribution of tasks and payloads among fleets of coordinated smaller satellites offers the possibility to overcome the classical limitations of traditional single...
doctoral thesis 2010
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Alberts, B.A. (author)
doctoral thesis 2009
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Soudarissanane, S. (author), Lindenbergh, R. (author), Menenti, M. (author), Teunissen, P.J.G. (author)
A terrestrial laser scanner measures the distance to an object with a precision in the order of millimeters. The quality of each single point in a point cloud affects post-processing applications, such as deformation analysis or 3D modeling. The quality of a scan point is influenced by four major factors: instrument calibration, atmospheric...
conference paper 2009
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Bucksch, A. (author), Lindenbergh, R. (author), Mementi, M. (author), Raman, M.Z. (author)
New airborne LiDAR (Light Detection and Ranging) measurement systems, like the FLI-MAP 400 System, make it possible to obtain high density data containing far more information about single objects, like trees, than traditional airborne laser systems. Therefore, it becomes feasible to analyze geometric properties of trees on the individual object...
conference paper 2009
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Bucksch, A. (author), Lindenbergh, R.C. (author), Menenti, M. (author), Raman, M.Z. (author)
New airborne LiDAR (Light Detection and Ranging) measurement systems, like the FLI-MAP 400 System, make it possible to obtain high density data containing far more information about single objects, like trees, than traditional airborne laser systems. Therefore, it becomes feasible to analyze geometric properties of trees on the individual object...
conference paper 2009
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Prutkin, I. (author), Tenzer, R. (author)
When topography is represented by a simple regular grid digital elevation model, the analytical rectangular prism approach is often used for a precise gravity field modelling at the vicinity of the computation point. However, when the topographical surface is represented more realistically, for instance by a triangular irregular network (TIN)...
journal article 2009
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Gunter, B. (author), Urban, T. (author), Riva, R. (author), Helsen, M. (author), Harpold, R. (author), Poole, S. (author), Nagel, P. (author), Schutz, B. (author), Tapley, B. (author)
In this study, we present a comparison of coincident GRACE and ICESat data over Antarctica. The analysis focused on the secular changes over a 4-year period spanning from 2003 to 2007, using the recently reprocessed and publicly available data sets for both missions. The results show that the two independent data sets possess strong spatial...
journal article 2009
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Duan, X.J. (author), Guo, J.Y. (author), Shum, C.K. (author), Van der Wal, W. (author)
We revisit the empirical moving window filtering method of Swenson and Wahr (Geophys Res Lett 33:L08402, 2006) and its variants, Chambers (Geophys Res Lett 33:L17603, 2006) and Chen et al. (Geophys Res Lett 34: L13302, 2007), for reducing the correlated errors in the Stokes coefficients (SCs) of the spherical harmonic expansion of the GRACE...
journal article 2009
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Tenzer, R. (author), Novak, P. (author), Prutkin, I. (author), Ellmann, A. (author), Vajda, P. (author)
To reduce the numerical complexity of inverse solutions to large systems of discretised integral equations in gravimetric geoid/quasigeoid modelling, the surface domain of Green’s integrals is subdivided into the near-zone and far-zone integration sub-domains. The inversion is performed for the near zone using regional detailed gravity data. The...
journal article 2009
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Bucksch, A. (author), Lindenbergh, R.C. (author), Menenti, M. (author)
Terrestrial laser scanners capture 3D geometry as a point cloud. This paper reports on a new algorithm aiming at the skeletonisation of a laser scanner point cloud, representing a botanical tree without leafs. The resulting skeleton can subsequently be applied to obtain tree parameters like length and diameter of branches for botanic...
conference paper 2009
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Bucksch, A. (author), Lindenbergh, R.C. (author), Menenti, M. (author)
In recent years, both airborne and terrestrial laser scanning developed to a standard technique for acquiring information on terrestrial landscapes. Here forest inventory and orchard management is considered. Inventory and parameterization of individual trees in orchards and forests are of large interest in nowadays society because of the...
conference paper 2009
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De Bakker, P.F. (author), Van der Marel, H. (author), Tiberius, C.C.J.M. (author)
This paper demonstrates a geometry-free GNSS measurement analysis approach and presents results of single frequency GPS, EGNOS and GIOVE short and zero baseline measurements. The purpose is to separate the different contributions to the measurement noise of pseudo range code and carrier phase observations at the receiver. The influence of...
journal article 2009
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Khoshelham, K. (author)
Direct measurement of exterior orientation parameters has been a challenge in photogrammetry for many years. Direct sensor orientation using a calibrated GPS/INS system can potentially eliminate the need for ground control points and aerial tiiangulation, and consequently, result in a great reduction in the cost and time of aerial photogrammetry...
journal article 2009
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Khoshelham, K. (author), Gorte, B.G. (author)
This paper presents a method for automated pointcloud-to-map registration using a plane matching technique. The registration is based on estimating a transformation between a set of planes inferred from the map and their corresponding planes extracted from the pointcloud. A plane matching algorithm is developed to search for corresponding planes...
conference paper 2009
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Klees, R. (author), Liu, X. (author), Wittwe, T. (author), Gunter, B.C. (author), Revtova, E.A. (author), Tenzer, R. (author), Ditmar, P. (author), Winsemius, H.C. (author), Savenije, H.H.G. (author)
When using GRACE as a tool for hydrology, many different gravity field model products are now available to the end user. The traditional spherical harmonics solutions produced from GRACE are typically obtained through an optimization of the gravity field data at the global scale, and are generated by a number of processing centers around the...
journal article 2008
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Schiller, S. (author), Tino, G.M. (author), Gill, E. (author)
The Einstein Gravity Explorer mission (EGE) is devoted to a precise measurement of the properties of space-time using atomic clocks. It tests one of the most fundamental predictions of Einstein’s Theory of General Relativity, the gravitational redshift, and thereby searches for hints of quantum effects in gravity, exploring one of the most...
journal article 2008
Searched for: department%3A%22Earth%255C+Observation%255C+and%255C+Space%255C+Systems%22
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