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Mulder, G. (author), van Leijen, F.J. (author), Barkmeijer, Jan (author), De Haan, Siebren (author), Hanssen, R.F. (author)Numerical weather prediction (NWP) models are used to predict the weather based on current observations in combination with physical and mathematical models. Yet, they are limited by the spatial density and the accuracy of the available observations. Satellite radar interferometry (InSAR) is known to be extremely sensitive to the 3D...journal article 2022
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De Haan, Guido (author), Verrina, Vanessa (author), Adam, A.J.L. (author), Zhang, Hao (author), Planken, Paul C.M. (author)In this paper, we report on surface-plasmon-resonance enhancement of the time-dependent reflection changes caused by laser-induced acoustic waves.We measure an enhancement of the reflection changes induced by several acoustical modes, such as longitudinal, quasi-normal, and surface acoustic waves, by a factor of 10-20.We show that the...journal article 2021
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Chimot, J.J. (author), Veefkind, j. Pepijn (author), De Haan, Johan F. (author), Stammes, Piet (author), Levelt, Pieternel Felicitas (author)Global mapping of satellite tropospheric NO<sub>2</sub> vertical column density (VCD), a key gas in air quality monitoring, requires accurate retrievals over complex urban and industrialized areas and under any atmospheric conditions. The high abundance of aerosol particles in regions dominated by anthropogenic fossil fuel combustion, e.g....journal article 2019
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Nanda, Swadhin (author), De Graaf, Martin (author), Veefkind, j. Pepijn (author), Ter Linden, Mark (author), Sneep, Maarten (author), De Haan, Johan (author), Levelt, Pieternel Felicitas (author)To retrieve aerosol properties from satellite measurements of the oxygen A-band in the near-infrared, a line-by-line radiative transfer model implementation requires a large number of calculations. These calculations severely restrict a retrieval algorithm's operational capability as it can take several minutes to retrieve the aerosol layer...journal article 2019
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Nanda, S. (author), Veefkind, j. Pepijn (author), De Graaf, Martin (author), Sneep, Maarten (author), Stammes, Piet (author), De Haan, Johan F. (author), Sanders, Abram F.J. (author), Apituley, Arnoud (author), Tuinder, Olaf (author), Levelt, Pieternel Felicitas (author)This paper presents a weighted least squares approach to retrieve aerosol layer height from top-of-atmosphere reflectance measurements in the oxygen A band (758-770g nm) over bright surfaces. A property of the measurement error covariance matrix is discussed, due to which photons travelling from the surface are given a higher preference over...journal article 2018
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Nanda, S. (author), De Graaf, Martin (author), Sneep, Maarten (author), De Haan, Johan F. (author), Stammes, Piet (author), Sanders, Abram F.J. (author), Tuinder, Olaf (author), Veefkind, j. Pepijn (author), Levelt, Pieternel Felicitas (author)Retrieving aerosol optical thickness and aerosol layer height over a bright surface from measured top-of-atmosphere reflectance spectrum in the oxygen A band is known to be challenging, often resulting in large errors. In certain atmospheric conditions and viewing geometries, a loss of sensitivity to aerosol optical thickness has been...journal article 2018
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Oude Nijhuis, A.C.P. (author), Thobois, L.P. (author), Barbaresco, F. (author), De Haan, S. (author), Dolfi Bouteyre, A. (author), Kovalev, D. (author), Krasnov, O.A. (author), Vanhoenacker-Janvier, D. (author), Wilson, R. (author), Yarovoy, Alexander (author)This article presents the prospects of measurement systems for wind hazards and turbulence at airports, which have been explored in the Ultrafast Wind Sensors (UFO) project. At France’s Toulouse–Blagnac Airport, in situ, profiling, and scanning sensors have been used to collect measurements, from which wind vectors and turbulence intensities are...journal article 2018
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Kovacsova, N. (author), Cabrall, C.D.D. (author), Antonisse, S.J. (author), De Haan, T. (author), van Namen, R. (author), Nooren, J.L. (author), Schreurs, R. (author), Hagenzieker, Marjan (author), de Winter, J.C.F. (author)Research indicates that crashes between a cyclist and a car often occur even when the cyclist must have seen the approaching car, suggesting the importance of hazard anticipation skills. This study aimed to analyze cyclists’ eye movements and crossing judgments while approaching an intersection at different speeds. Thirty-six participants...journal article 2018
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Chimot, J.J. (author), Veefkind, j. Pepijn (author), Vlemmix, T. (author), De Haan, Johan F. (author), Amiridis, Vassilis (author), Proestakis, Emmanouil (author), Marinou, Eleni (author), Levelt, Pieternel Felicitas (author)This paper presents an exploratory study on the aerosol layer height (ALH) retrieval from the OMI 477nm O<sub>2</sub> O<sub>2</sub> spectral band. We have developed algorithms based on the multilayer perceptron (MLP) neural network (NN) approach and applied them to 3-year (2005-2007) OMI cloud-free scenes over north-east Asia, collocated with...journal article 2017
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Veefkind, j. Pepijn (author), De Haan, Johan F. (author), Sneep, Maarten (author), Levelt, Pieternel Felicitas (author)The OMI (Ozone Monitoring Instrument on board NASA's Earth Observing System (EOS) Aura satellite) OMCLDO2 cloud product supports trace gas retrievals of for example ozone and nitrogen dioxide. The OMCLDO2 algorithm derives the effective cloud fraction and effective cloud pressure using a DOAS (differential optical absorption spectroscopy) fit...journal article 2016
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Jansen, S.J.T. (author), Boelhouwer, P.J. (author), Boumeester, H.J.F.M. (author), Coolen, H.C.C.H. (author), De Haan, J. (author), Lamain, C.J.M. (author)Rapport opgesteld met subsidie van Dialoogtafel Groningen.report 2016
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- Kovacsova, N. (author), Cabrall, C.D.D. (author), Antonisse, S.J. (author), De Haan, T. (author), van Namen, I.F. (author), Nooren, J.L. (author), Schreurs, R. (author), Hagenzieker, Marjan (author), de Winter, J.C.F. (author) poster 2016
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De Haan, J. (author)Statistics Netherlands is planning to use scanner data on a large scale for the compilation of the CPI, covering supermarkets, department stores, do-it-yourself stores, etc. Ideally, to make the production process as efficient as possible, a limited number of fully or semi-automated methods would be used. The purpose of this paper is to propose...conference paper 2015
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Chimot, J.J. (author), Vlemmix, T. (author), Veefkind, J.P. (author), De Haan, J.F. (author), Levelt, P.F. (author)The Ozone Monitoring Instrument (OMI) instrument has provided daily global measurements of tropospheric NO2 for more than a decade. Numerous studies have drawn attention to the complexities related to measurements of tropospheric NO2 in the presence of aerosols. Fine particles affect the OMI spectral measurements and the length of the average...journal article 2015
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Teye, A.L. (author), De Haan, J. (author), Elsinga, M. (author)As in many countries, the Dutch housing market was severely hit by the recent financial crisis. Following the recession, the average house price in the Netherlands fell by almost 25% and the proportion of homeowners with mortgage payment arrears nearly doubled. In this paper, we study mortgage payment arrears in the Netherlands and investigate...conference paper 2015
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Holtz, G. (author), Alkemade, F. (author), De Haan, F. (author), Köhler, J. (author), Trutnevyte, E. (author), Luthe, T. (author), Halbe, J. (author), Papachristos, G. (author), Chappin, E. (author), Kwakkel, J.H. (author), Ruutu, S. (author)Societal transitions involve multiple actors, changes in institutions, values and technologies, and interactions across multiple sectors and scales. Given this complexity, this paper takes on the view that the societal transitions research field would benefit from the further maturation and broader uptake of modelling approaches. This paper...journal article 2015
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Mielonen, T. (author), De Haan, J.F. (author), Van Peet, J.C.A. (author), Eremenko, M. (author), Veefkind, J.P. (author)We have assessed the sensitivity of the operational Ozone Monitoring Instrument (OMI) ozone profile retrieval algorithm to a number of a priori and radiative transfer assumptions. We studied the effect of stray light correction, surface albedo assumptions and a priori ozone profiles on the retrieved ozone profile. Then, we studied how to modify...journal article 2015
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De Haan, V.O. (author), Plomp, J. (author), Van Well, A.A. (author), Rekveldt, M.T. (author), Hasegawa, Y.H. (author), Dalgliesh, R.M. (author), Steinke, N.J. (author)With a neutron spin-echo reflectometer (OffSpec at ISIS, UK) it is possible to measure the gravitation-induced quantum phase difference between the two spin states of the neutron wave function in a magnetic field. In the small-angle approximation, this phase depends linearly on the inclination angle of the neutron beam with respect to the...journal article 2014
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Mielonen, T. (author), De Haan, J.F. (author), Veefkind, J.P. (author)We have assessed the sensitivity of the operational OMI ozone profile retrieval (OMO3PR) algorithm to a number of a priori assumptions. We studied the effect of stray light correction, surface albedo assumptions and a priori ozone profiles on the retrieved ozone profile. Then, we studied how to modify the algorithm to improve the retrieval of...journal article 2014
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Cvoric, D. (author), Lahaye, D. (author), De Haan, S.W.H. (author), Ferreira, J.A. (author)Due to increasing levels of fault currents, Fault Current Limiters (FCLs) are expected to play an important role in the protection of future power grids. Inductive saturable FCLs are particularly interesting due to their inherent reaction on the fault. Many different configurations have been proposed in literature. Being difficult or impossible...report 2013