Searched for: department%3A%22Geoscience%255C%2Band%255C%2BRemote%255C%2BSensing%22
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Law, Robert (author), Christoffersen, Poul (author), Hubbard, Bryn (author), Doyle, Samuel H. (author), Chudley, Thomas R. (author), Schoonman, Charlotte M. (author), Bougamont, Marion (author), des Tombe, B.F. (author), Schilperoort, B. (author), Kechavarzi, Cedric (author), Booth, Adam (author), Young, Tun Jan (author)
Measurements of ice temperature provide crucial constraints on ice viscosity and the thermodynamic processes occurring within a glacier. However, such measurements are presently limited by a small number of relatively coarse-spatial-resolution borehole records, especially for ice sheets. Here, we advance our understanding of glacier...
journal article 2021
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Sarna, K. (author), Donovan, D.P. (author), Russchenberg, H.W.J. (author)
Accurate lidar-based measurements of cloud optical extinction, even though perhaps limited to the cloud base region, are useful. Arguably, more advanced lidar techniques (e.g. Raman) should be applied for this purpose. However, simpler polarisation and backscatter lidars offer a number of practical advantages (e.g. better resolution and more...
journal article 2021
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Yin, Jiapeng (author), Hoogeboom, P. (author), Unal, C.M.H. (author), Russchenberg, H.W.J. (author)
Radio frequency interference (RFI) has become a growing concern for weather radar, distorting radar variable estimation. By simultaneously or alternately transmitting the horizontal and vertical polarized waves, polarimetric weather radar can be referred to as SHV radar or AHV radar. The SHV radar can mimic the AHV radar by discarding either...
journal article 2021
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Sellevold, R. (author), Lenaerts, Jan T.M. (author), Vizcaino, M. (author)
The Arctic is the region on Earth that is warming the fastest. At the same time, Arctic sea ice is reducing while the Greenland ice sheet (GrIS) is losing mass at an accelerated pace. Here, we study the seasonal impact of reduced Arctic sea ice on GrIS surface mass balance (SMB), using the Community Earth System Model version 2.1 (CESM2),...
journal article 2021
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Ran, Jiangjun (author), Ditmar, P.G. (author), Liu, Lin (author), Xiao, Yun (author), Klees, R. (author), Tang, Xueyuan (author)
Mascon products derived from Gravity Recovery and Climate Experiment satellite gravimetry data are widely used to study the Greenland ice sheet mass balance. However, the products released by different research groups—JPL, CSR, and GSFC—show noticeable discrepancies. To understand them, we compare those mascon products with mascon solutions...
journal article 2021
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Li, B. (author), Basu, S. (author), Watson, S.J. (author), Russchenberg, H.W.J. (author)
In the near future, wind and solar generation are projected to play an increasingly important role in Europe's energy sector. With such fast-growing renewable energy development, the presence of simultaneous calm wind and overcast conditions could cause significant shortfalls in production with potentially serious consequences for system...
journal article 2021
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Molijn, R.A. (author)
In this study, research on productivity and land cover monitoring is presented, with a focus on sugarcane, based on space-based remote sensing observations that were collected by Synthetic Aperture Radar (SAR) and optical sensors. The study aims to provide new insights into techniques and methodologies that allow for cost-efficient monitoring of...
doctoral thesis 2020
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Gatidis, C. (author), Schleiss, M.A. (author), Unal, C.M.H. (author), Russchenberg, H.W.J. (author)
The adequacy of the gamma model to describe the variability of raindrop size distributions (DSD) is studied using observations from an optical disdrometer. Model adequacy is checked using a combination of Kolmogorov–Smirnov goodness-of-fit test and Kullback–Leibler divergence and the sensitivity of the results to the sampling resolution is...
journal article 2020
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Li, B. (author), Basu, S. (author), Watson, S.J. (author), Russchenberg, H.W.J. (author)
In the coming decades, both wind and solar power production will be playing increasingly important roles in Europe's energy economy. It is absolutely essential that power grids are resilient against any unusual weather phenomena. One such meteorological phenomenon, "Dunkelflaute", is causing serious concern to the renewable energy industry,...
journal article 2020
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Dun, H. (author), Tiberius, C.C.J.M. (author), Janssen, G.J.M. (author)
In developing a high accuracy terrestrial radio navigation system, as a complement to a global navigation satellite system (GNSS), it is recognized that the performance of time delay estimation is proportional to, and thereby limited by, the signal bandwidth. Given a possibly narrow signal bandwidth, the central carrier phase can,...
journal article 2020
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Wang, Kan (author), Chen, Pei (author), Teunissen, P.J.G. (author)
The Japanese Quasi-Zenith Satellite System (QZSS) satellite system has placed in orbit four satellites by October 2017. The Indian Regional Navigation Satellite System (IRNSS) system has launched the new satellite IRNNSS-11 in April 2018, completing seven operational satellites. Together with the GPS block IIF satellites and the Galileo...
journal article 2019
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Oude Nijhuis, A.C.P. (author), Unal, C.M.H. (author), Krasnov, O.A. (author), Russchenberg, H.W.J. (author), Yarovoy, Alexander (author)
In this article, five velocity-based energy dissipation rate (EDR) retrieval techniques are assessed. The EDR retrieval techniques are applied to Doppler measurements from Transportable Atmospheric Radar (TARA)—a precipitation profiling radar—operating in the vertically fixed-pointing mode. A generalized formula for the Kolmogorov constant is...
journal article 2019
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Yin, Jiapeng (author), Hoogeboom, P. (author), Unal, C.M.H. (author), Russchenberg, H.W.J. (author), van der Zwan, W.F. (author), Oudejans, Erik (author)
Weather radar is well recognized as an effective sensor for obtaining the microphysical and dynamical properties of precipitation at high spatial and temporal resolution. Radar calibration is one of the most important prerequisites for achieving accurate observations. In this article, a portable, cost-effective and repeatable radar calibration...
journal article 2019
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Reinoso Rondinel, R. (author), Unal, C.M.H. (author), Russchenberg, H.W.J. (author)
In radar polarimetry, the differential phase CDP consists of the propagation differential phase FDP and the backscatter differential phase dhv. While FDP is commonly used for attenuation correction (i.e., estimation of the specific attenuation A and specific differential phase KDP), recent studies have demonstrated that dhv can provide...
journal article 2018
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Reinoso Rondinel, R. (author)
Observations of weather phenomena have attracted many researchers because of their microphysical complexity, space-time variability, and more important, their impact on human life. In the efforts of studying weather, researchers have used a diverse number of instruments to obtain both in-situ (towers, tethered balloons, and weather station...
doctoral thesis 2018
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Pfitzenmaier, L. (author), Unal, C.M.H. (author), Dufournet, Yann (author), Russchenberg, H.W.J. (author)
The growth of ice crystals in presence of supercooled liquid droplets represents the most important process for precipitation formation in the mid-latitudes. However, such mixed-phase interaction processes remain relatively unknown, as capturing the complexity in cloud dynamics and microphysical variabilities turns to be a real observational...
journal article 2018
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Boers, Reinout (author), Knist, Christine (author), Russchenberg, H.W.J. (author), Werner, Frank (author), Wood, Robert (author), Zhang, Zhibo (author), Quaas, Johannes (author)
The cloud droplet number concentration (N<sub>d</sub>) is of central interest to improve the understanding of cloud physics and for quantifying the effective radiative forcing by aerosol-cloud interactions. Current standard satellite retrievals do not operationally provide N<sub>d</sub>, but it can be inferred from retrievals of cloud optical...
journal article 2018
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Mamali, D. (author), Marinou, Eleni (author), Sciare, Jean (author), Pikridas, Michael (author), Kokkalis, Panagiotis (author), Kottas, Michael (author), Binietoglou, Ioannis (author), Tsekeri, Alexandra (author), Keleshis, Christos (author), Engelmann, Ronny (author), Baars, Holger (author), Ansmann, Albert (author), Amiridis, Vassilis (author), Russchenberg, H.W.J. (author), Biskos, G. (author)
In situ measurements using unmanned aerial vehicles (UAVs) and remote sensing observations can independently provide dense vertically resolved measurements of atmospheric aerosols, information which is strongly required in climate models. In both cases, inverting the recorded signals to useful information requires assumptions and constraints,...
journal article 2018
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Reinoso Rondinel, R. (author), Unal, C.M.H. (author), Russchenberg, H.W.J. (author)
One of the most beneficial polarimetric variables may be the specific differential phase K<sub>DP</sub> because of its independence from power attenuation and radar miscalibration. However, conventional K<sub>DP</sub> estimation requires a substantial amount of range smoothing as a result of the noisy characteristic of the measured...
journal article 2018
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Yin, J. (author), Unal, C.M.H. (author), Schleiss, M.A. (author), Russchenberg, H.W.J. (author)
A novel algorithm is put forward to separate radar target and moving clutter based on a combination of the low-rank matrix optimization (LRMO) and the decision tree. Similar to the moving object detection in the field of automated video analysis, the proposed separation method, which is carried out in the range-Doppler domain, makes use of...
journal article 2018
Searched for: department%3A%22Geoscience%255C%2Band%255C%2BRemote%255C%2BSensing%22
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