- document
-
Slobbe, D.C. (author), Ditmar, P.G. (author), Lindenbergh, R.C. (author)The focus of this paper is on the quantification of ongoing mass and volume changes over the Greenland ice sheet. For that purpose, we used elevation changes derived from the Ice, Cloud, and land Elevation Satellite (ICESat) laser altimetry mission and monthly variations of the Earth’s gravity field as observed by the Gravity Recovery and...journal article 2008
- document
-
Gunter, B.C. (author), Maessen, D.C. (author)The goal of this study is to explore those applications which can best utilize a network of orbiting satellites working as a distributed computing array. The satellites are presumed to be low-cost mini- or micro-satellites orbiting Earth or some other celestial body (i.e., an asteroid, moon, etc.), and should have a (near) constant communication...conference paper 2010
- document
-
Broerse, D.B.T. (author), Vermeersen, L.L.A. (author), Riva, R.E.M. (author), Van der Wal, W. (author)Large earthquakes do not only heavily deform the crust in the vicinity of the fault, they also change the gravity field of the area affected by the earthquake due to mass redistribution in the upper layers of the Earth. Besides that, for sub-oceanic earthquakes deformation of the ocean floor causes relative sea level changes and mass...journal article 2011
- document
-
Verhagen, A.A. (author), Teunissen, P.J.G. (author), Van der Marel, H. (author), Li, B. (author)A key issue with GNSS carrier phase ambiguity resolution is that often the full set of ambiguities cannot be fixed fast and reliably. A possible strategy is then to resolve only a subset of ambiguities, one for which the probability of correct fixing, the so-called success rate, is sufficiently close to 1. However, a proper subset selection...conference paper 2011
- document
-
Veerman, H. (author), Van Kleef, A. (author), Wokke, F. (author), Ober, O. (author), Tiberius, C.C.J.M. (author), Verhagen, A.A. (author), Bos, A. (author), Mieremet, A. (author)The paper presents a short introduction to the mathematical theory of the EVT, the consecutive steps that are made in the software tool to address MI probability estimation and proof of range error distribution overbounding. Finally some early results obtained by GIMAT are presented.conference paper 2012
- document
-
McLinden, C.A. (author), Fioletov, V. (author), Boersma, K.F. (author), Krotkov, N. (author), Sioris, C.E. (author), Veefkind, J.P. (author), Yang, K. (author)Results from the first assessment of air quality over the Canadian oil sands–one of the largest industrial undertakings in human history–using satellite remote sensing observations of two pollutants, nitrogen dioxide (NO2) and sulfur dioxide (SO2), are presented. High-resolution maps were created that revealed distinct enhancements in both...journal article 2012
- document
-
Maffei, C. (author), Alfieri, S.M. (author), Menenti, M. (author)The objective of the present research was the characterisation of fire hazard using temporal sequences of land surface temperature (LST) derived from Terra-MODIS measurements. The investigation was based on a complete sequence of MODIS LST data from 2000 to 2006 on Campania (Italy) and on a dataset of fires officially recorded in the area in the...conference paper 2012
- document
-
Unal, C.M.H. (author), Dufournet, Y. (author), Otto, T. (author), Russchenberg, H.W.J. (author)In the past 10 years, the S-band FM-CW TARA (Transportable Atmospheric RAdar), placed at the Cabauw Experimental Site for Atmospheric Research (CESAR), provided in real-time vertical profiles of the Doppler moments. Classical spectral processing was carried out. The polarimetric and multi-beam measurement capabilities of the radar were not...conference paper 2012
- document
-
King, M.A. (author), Keshin, M. (author), Whitehouse, P.L. (author), Thomas, I.D. (author), Milne, G. (author), Riva, R.E.M. (author)The only vertical land movement signal routinely corrected for when estimating absolute sea-level change from tide gauge data is that due to glacial isostatic adjustment (GIA). We compare modeled GIA uplift (ICE-5G + VM2) with vertical land movement at ?300 GPS stations located near to a global set of tide gauges, and find regionally coherent...journal article 2012
- document
-
Stepanov, I. (author), Placidi, S. (author), Russchenberg, H.W.J. (author)Earth's low altitude, warm, layered clouds play a major role in the climate system, reflecting back a large amount of the incoming shortwave radiation from the Sun. Stratocumulus (Sc) clouds are typical representatives of such type of clouds. They cover vast areas, extensively spreading in horizontal direction, having a considerable impact on...conference paper 2012
- document
-
Sithole, G. (author), Gorte, B.G.H. (author)As lidar point clouds become larger streamed processing becomes more attractive. This paper presents a framework for the streamed segmentation of point clouds with the intention of segmenting unstructured point clouds in real-time. The framework is composed of two main components. The first component segments points within a window shifting over...conference paper 2012
- document
-
Gorte, B.G.H. (author), Sithole, G. (author)The paper addresses range image segmentation, particularly of data recorded by range cameras, such as the Microsoft Kinect and the Mesa Swissranger SR4000. These devices record range images at video frame rates and allow for acqui-sition of 3-dimensional measurement sequences that can be used for 3D reconstruction of indoor environments from...journal article 2012
- document
-
Daou, I. (author), Mariko, A. (author), Rasmus, F. (author), Menenti, M. (author), Kourosh, K. (author), Maïga, H.B. (author), Maïga, S.M. (author)The knowledge of the various terms which intervene in the energy balance of surface is essential at the same time for the hydrologists, the amenagists, the agronomists, the meteorologists, and the climatologists. The land surface temperature of the making ground left the key parameters of this assessment, plays a fundamental part in the...journal article 2012
- document
-
Unal, C.M.H. (author), Dufournet, Y. (author), Otto, T. (author), Russchenberg, H.W.J. (author)In the past 10 years, the S-band FM-CW TARA (Transportable Atmospheric RAdar), placed at the Cabauw Experimental Site for Atmospheric Research (CESAR), provided in real-time vertical profiles of the Doppler moments. Classical spectral processing was carried out. The polarimetric and multi-beam measurement capabilities of the radar were not...conference paper 2012
- document
-
Unal, C.M.H. (author)Acquiring the raindrop size distribution (DSD) from radar data is still a challenge. For profiling radar, this distribution can be estimated from the Doppler spectra. However the Doppler spectrum is not a direct measure of the DSD. The radial component of the wind shifts the Doppler spectrum related to the raindrop size distribution along the...conference paper 2012
- document
-
Böing, S.J. (author), Siebesma, A.P. (author), Korpershoek, J.D. (author), Jonker, H.J.J. (author)This study explores the mechanisms that determine detrainment in deep cumulus convection. A set of 90 high-resolution Large Eddy Simulations is used to systematically explore the sensitivity of continental deep convection to the relative humidity and stability of the free troposphere. It appears that variations in the mass-flux profiles are...journal article 2012
- document
-
Caro Cuenca, M. (author)Radar interferometry (InSAR) is a valuable tool to measure surface motion. Applying time series techniques such as Persistent Scatterer Interferometry (PSI), InSAR is able to provide surface displacements maps with mm-precision. However, InSAR can still be further optimized, e.g. by exploiting spatial characteristics of the signal of interest....doctoral thesis 2012
- document
-
Gunter, B.C. (author), Didova, O. (author), Riva, R.E.M. (author), van den Broeke, M.R. (author), Ligtenberg, S.R.M. (author), Lenaerts, J.T.M. (author), King, M. (author), Urban, T. (author)This study explores an approach that simultaneously estimates Antarctic mass balance and glacial isostatic adjustment (GIA) through the combination of satellite gravity and altimetry data sets. The results improve upon previous efforts by incorporating reprocessed data sets over a longer period of time, and now include a firn densification model...conference paper 2012
- document
-
Ghafarian Malamiri, H.R. (author), Menenti, M. (author), Jia, L. (author), den Ouden, H. (author)Time series satellite observations of land surface properties, like Land Surface Temperature (LST), often feature missing data or data with anomalous values due to cloud coverage, malfunction of sensor, atmospheric aerosols, defective cloud masking and retrieval algorithms. Preprocessing procedures are needed to identify anomalous observations...journal article 2012
- document
-
Phan Hien, V. (author), Lindenbergh, R.C. (author), Menenti, M. (author)The Tibetan plateau is an essential source of water for South-East Asia. The run-off from its ~ 34 000 glaciers, which occupy an area of ~ 50 000 km2, feed Tibetan lakes and major Asian rivers like Indus and Brahmaputra. Reported glacial shrinkage likely has its impact on the run-off. Unfortunately, accurate quantification of glacial changes is...journal article 2013