Searched for: subject:"satellite"
(1 - 20 of 75)

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Sun, Y. (author)
Geocenter motion and changes in the Earth’s dynamic oblateness (J2) are of great importance in many applications. Among others, they are critical indicators of largescale mass redistributions, which is invaluable to understand ongoing global climate change. The revolutionary Gravity Recovery and Climate Experiment (GRACE) satellite mission...
doctoral thesis 2017
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Root, B.C. (author)
In the last decade, the gravity field of the Earth has been observed with increased coverage due to dedicated satellite missions, which resulted in higher resolution and more accurate global gravity field models than were previously available. These models make it possible to study large scale processes such as solid Earth deformation after...
doctoral thesis 2017
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Sun, Y. (author), Ditmar, P.G. (author), Riva, R.E.M. (author)

In this study, we develop a methodology to estimate monthly variations in degree-1 andC20 coefficients by combing Gravity Recovery and Climate Experiment (GRACE) data withoceanic mass anomalies (combination approach).With respect to the method by Swenson et al.,the proposed approach exploits noise covariance information of both...

journal article 2017
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Marijnissen, R.J.C. (author), Aarninkhof, S.G.J. (author)

The goal of the study is to map the changes of marsh extent and topography on both Sturgeon Bank and Westham Island between 1980 and now. The study will look for a correlation between the recession and the possible loss of sediment from the banks. If a sediment deficit is a (major) contributor of marsh recession within the...

report 2017
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Snellen, I. A G (author), Désert, J. M. (author), Waters, L. B.F.M. (author), Robinson, T (author), Meadows, V. (author), van Dishoeck, E.F. (author), Brandl, B.R. (author), Henning, T. (author), Bouwman, J. (author), Lahuis, F. (author), Min, M. (author), Lovis, C. (author), Dominik, C. (author), Van Eylen, V. (author), Sing, D. (author), Anglada-Escudé, G. (author), Birkby, J. L. (author), Brogi, M. (author)

Exoplanet Proxima b will be an important laboratory for the search for extraterrestrial life for the decades ahead. Here, we discuss the prospects of detecting carbon dioxide at 15 μm using a spectral filtering technique with the Medium Resolution Spectrograph (MRS) mode of the Mid-Infrared Instrument (MIRI) on the James Webb Space Telescope ...

journal article 2017
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Teunissen, P.J.G. (author), Imparato, D. (author), Tiberius, C.C.J.M. (author)
As the navigation solution of exclusion-based RAIM follows from a combination of least-squares estimation and a statistically based exclusion-process, the computation of the integrity of the navigation solution has to take the propagated uncertainty of the combined estimation-testing procedure into account. In this contribution, we analyse,...
journal article 2017
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Samiei Esfahany, S. (author)
During the last decades, time-series interferometric synthetic aperture radar (InSAR) has emerged as a powerful technique to measure various surface deformation phenomena of the earth. Early generations of time-series InSAR methodologies, i.e. Persistent Scatterer Interferometry (PSI), focused on point targets, which are mainly man-made features...
doctoral thesis 2017
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De Bruijn, F.J. (author)
doctoral thesis 2017
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Guo, X. (author), Ditmar, P.G. (author), Zhao, Q (author), Klees, R. (author), Farahani, H. (author)

GPS data collected by satellite gravity missions can be used for extracting the long-wavelength part of the Earth’s gravity field. We propose a new data processing method which makes use of the ‘average acceleration’ approach to gravity field modelling. In this method, satellite accelerations are directly derived from GPS carrier phase...

journal article 2017
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Zaminpardaz, Safoora (author), Teunissen, P.J.G. (author), Nadarajah, Nandakumaran (author)

The Indian Regional Navigation Satellite System (IRNSS) has recently (May 2016) become fully-operational and has been provided with the operational name of NavIC (Navigation with Indian Constellation). It has been developed by the Indian Space Research Organization (ISRO) with the objective of offering positioning, navigation and timing (PNT)...

journal article 2017
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Fu, Guangliang (author), Prata, Fred (author), Lin, H.X. (author), Heemink, A.W. (author), Segers, AJ (author), Lu, S. (author)
Using data assimilation (DA) to improve model forecast accuracy is a powerful approach that requires available observations. Infrared satellite measurements of volcanic ash mass loadings are often used as input observations for the assimilation scheme. However, because these primary satellite-retrieved data are often two-dimensional (2-D) and...
journal article 2017
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Fu, Guangliang (author)
The 2010 Eyjafjallajökull volcano eruption had serious consequences to civil aviation. This has initiated a lot of research on volcanic ash forecasting in recent years. For forecasting the volcanic ash transport after eruption onset, a volcanic ash transport and diffusion model (VATDM) needs to be run with Eruption Source Parameters (ESPs) such...
doctoral thesis 2017
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Hagenaars, G.S. (author), Luijendijk, A.P. (author), de Vries, S. (author), de Boer, W.P. (author)
conference paper 2017
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de Teixeira da Encarnacao, J. (author), Arnold, Daniel (author), Bezděk, Aleš (author), Dahle, Christoph (author), Doornbos, E.N. (author), van den IJssel, J.A.A. (author), Jäggi, Adrian (author), Mayer-Gürr, Torsten (author), Sebera, Josef (author), Visser, P.N.A.M. (author), Zehentner, Norbert (author)

It is of great interest to numerous geophysical studies that the time series of global gravity field models derived from Gravity Recovery and Climate Experiment (GRACE) data remains uninterrupted after the end of this mission. With this in mind, some institutes have been spending efforts to estimate gravity field models from alternative...

journal article 2016
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Engelen, S. (author)
Satellite swarms are a novelty, yet promise to deliver unprecedented robustness and data-collection efficiency. They are so new in fact that even the definition of what a satellite swarm is is disputable, and consequently, the term "swarm" is used for practically any type of distributed space architecture. This thesis poses the proposed...
doctoral thesis 2016
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Bezděk, Aleš (author), Sebera, Josef (author), de Teixeira da Encarnacao, J. (author), Klokočnik, Jaroslav (author)

Since 2002 Gravity Recovery and Climate Experiment (GRACE) provides monthly gravity fields from K-band ranging (KBR) between two GRACE satellites. These KBR gravity monthlies have enabled the global observation of time-varying Earth mass signal at a regional scale (about 400 km resolution). Apart from KBR, monthly gravity solutions can be...

journal article 2016
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Simon, K.M. (author), James, T. S. (author), Henton, J. A. (author), Dyke, A. S. (author)

The thickness and equivalent global sea level contribution of an improved model of the central and northern Laurentide Ice Sheet is constrained by 24 relative sea level histories and 18 present-day GPS-measured vertical land motion rates. The final model, termed Laur16, is derived from the ICE-5G model by holding the timing history constant...

journal article 2016
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Simons, G.W.H. (author), Bastiaanssen, W.G.M. (author), Ngô, L.A. (author), Hain, C.R. (author), Anderson, M. (author), Senay, G. (author)
With changes in weather patterns and intensifying anthropogenic water use, there is an increasing need for spatio-temporal information on water fluxes and stocks in river basins. The assortment of satellite-derived open-access information sources on rainfall (P) and land use/land cover (LULC) is currently being expanded with the application of...
journal article 2016
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De Bakker, P.F. (author)
Precise Point Positioning (PPP) is a Global Navigation Satellite System (GNSS) processing method with the objective of providing high positioning accuracy without the need for a nearby base station or dense network of reference stations operated by the user. To reach this objective, PPP uses the very precise carrier phase measurements in...
doctoral thesis 2016
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Wu, Y. (author), de Graaf, M. (author), Menenti, M. (author)
This study is to evaluate the sensitivity of Aerosol Optical Depth (AOD τ) to aerosol vertical profile and type, using the Moderate Resolution Imaging Spectroradiometer (MODIS)...
journal article 2016
Searched for: subject:"satellite"
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