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Fernández, A.J. (author), Apituley, A. (author), Veselovskii, I. (author), Suvorina, A. (author), Henzing, J. (author), Pujadas, M. (author), Artíñano, B. (author)This article presents a study of aerosol optical and microphysical properties under different relative humidity (RH) but well mixed layer conditions using optical and microphysical aerosol properties from multi-wavelength (MW) Raman lidar and in-situ aerosol observations collected at the Cabauw Experimental Site for Atmospheric Research (CESAR)....article 2015
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- Papanikolaou, I.D. (author), van Balen, R. (author), Silva, P.G. (author), Reicherter, K. (author) article 2015
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Donovan, D.P. (author), Klein Baltink, H. (author), Henzing, J.S. (author), de Roode, S.R. (author), Siebesma, A.P. (author)The fact that polarisation lidars measure a depolarisation signal in liquid clouds due to the occurrence of multiple scattering is well known. The degree of measured depolarisation depends on the lidar characteristics (e.g. wavelength and receiver field of view) as well as the cloud macrophysical (e.g. cloud-base altitude) and microphysical (e.g...article 2015
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Valckenborg, R.M.E. (author), Ghotge, R. (author), Folkerts, W. (author)This paper presents a working model to estimate the solar photovoltaic potential using high- resolution LiDAR data and Geographic Information Systems. This bottom-up approach method has been selected to arrive at the potential as this gives a better estimate than a top-down approach. The novelty of the study lies in estimating the potential at...conference paper 2015
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Dol, H.S. (author), Sabel, J.C. (author), Lensen, H.A. (author), Beckers, A.L.D. (author)Small drifting objects can be a big threat to surface ships, especially when the objects are explosion hazards like sea mines that have become detached from their moorings. Timely detection of such objects is crucial in order to be able to perform adequate evasive manoeuvres. However, the vertical position of drifting mines is a serious...conference paper 2010
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TNO Defensie en Veiligheid (author), van den Heuvel, J.C. (author), van Putten, F.J.M. (author), Cohen, L.H. (author), Kemp, R.A.W. (author), Franssen, G.C. (author)Coastal surveillance and naval operations in the littoral both have to deal with the threat of small sea-surface targets. These targets have a low radar cross-section and a low velocity that makes them hard to detect by radar. Typical threats include jet skis, FIAC's, and speedboats. Previous lidar measurements at the coast of the Netherlands...conference paper 2009
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- van den Heuvel, J.C. (author), van Eijk, A.M.J. (author), Bekman, H.H.P.T. (author), van Putten, F.J.M. (author), Cohen, L.A. (author), Pace, P.W. (author), TNO Defensie en Veiligheid (author) conference paper 2008
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Apituley, A. (author), Schaap, M. (author), Koelemeijer, R. (author), Timmermans, R. (author), Schoemaker, R.M. (author), de Leeuw, G. (author), TNO Defensie en Veiligheid (author)To acquire daily estimates of PM2.5 distributions based on satellite data one depends critically on a well established relation between AOD and ground level PM2.5. In this study we aimed to experimentally establish the AOD-PM2.5 relationship for the Netherlands. For that purpose an experiment was set-up at the AERONET site Cabauw. The average...conference paper 2008
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TNO Defensie en Veiligheid (author), van den Heuvel, J.C. (author), Bekman, H.H.P.T. (author), Putten, F.J.M. (author), Cohen, L.A. (author)Naval operations in the littoral have to deal with the threat of small sea-surface targets. These targets have a low radar cross-section and low velocity, which makes them hard to detect by radar in the presence of sea clutter. Typical threats include periscopes, jet skies, FIAC’s, and speedboats. Search lidars on board naval vessels can provide...conference paper 2007
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TNO Fysisch en Elektronisch Laboratorium (author), Kunz, G.J. (author), de Leeuw, G. (author)A scanning backscatter lidar, operating at a wavelength of 1.06 um, was used to measure the volume backscatter coefficient of coastal aerosol at the Mace Head Research Station on the west coast of Ireland during the PARFORCE experiments in September 1998 and June 1999. Lidar measurements under a fixed elevation angle at fixed time intervals...conference paper 2002
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TNO Fysisch en Elektronisch Laboratorium (author), Kunz, G.J. (author), de Leeuw, G. (author), Becker, E. (author), O`Dowd, C.D. (author)A scanning backscatter lidar was used to measure the depth and structure of the coastal atmospheric boundary layer and the evolution of primary aerosol (sea spray) plumes produced by breaking waves during the New Particle Formation and Fate in the Coastal Environment (PARFORCE) campaign at the Mace Head Atmospheric Research Station (Ireland) in...article 2002
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TNO Fysisch en Elektronisch Laboratorium (author), van den Heuvel, J.C. (author), Driesenaar, M.L. (author), Lerou, R.J.L. (author)Airborne lidar signals of cirrus clouds are analyzed to determine the cloud structure. Climate modeling and numerical weather prediction benefit from accurate modeling of cirrus clouds. Airborne lidar measurements of the European Lidar in Space Technology Experiment (ELITE) campaign were analyzed by combining shots to obtain the backscatter at...article 2000
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Kunz, G.J. (author), TNO Fysisch en Elektronisch Laboratorium (author)Potter [Appl. Opt. 26, 1250 (1987)] has presented a method to determine profiles of the atmospheric aerosol extinction coefficients by use of a two-wavelength lidar with the assumptions of a constant value for the extinction-to-backscatter ratio for each wavelength and a constant value for the ratio between the two extinction coefficients at the...article 1999
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Jordan, M. (author), Wash, C. (author), Durkee, P.H. (author), Veefkind, J.P. (author), de Leeuw, G. (author), Smith, M.H. (author), Hill, M.K. (author), TNO Fysisch en Elektronisch Laboratorium (author)Knowledge of the coastal MABL for the entire battlespace is critical for modern Navy operations. To support modern weapon and sensor systems, quantitative assessment of a number of MABL properties are needed. They include: optical depth, boundary layer depth, sea surface temperature, and surface layer temperature and moisture. These needs are...conference paper 1998
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TNO Fysisch en Elektronisch Laboratorium (author), Wash, C. (author), Jordan, M. (author), Durkee, P.H. (author), Veefkind, J.P. (author), de Leeuw, G. (author)Coastal Marine Atmospheric Boundary Layer (MABL) aerosol optical depth is estimated from satellite data and compared with ship-based aerosol and lidar backscatter measurements, aircraft-measured aerosol, and rawinsonde data during the EO Propagation Assessment in Coastal Environments (EOPACE) Intense Observing Period (IOP) during April 1996. In...conference paper 1998
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Kunz, G.J. (author), TNO Fysisch en Elektronisch Laboratorium (author)Wind speeds and wind directions are measured remotely using an incoherent backscatter lidar system operating at a wavelength of 1.06 mm with a maximum repetition rate of 13 Hz. The principle of the measurements is based on following detectable atmospheric structures, which are transported by the wind (Taylor’s hypothesis). The characteristic...article 1996
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Kunz, G.J. (author), TNO Fysisch en Elektronisch Laboratorium (author)Single-scatter lidar signals carry information on the spatial atmospheric backscatter coefficient, attenuated by the path-integrated extinction. Assuming that the relationship between the backscatter and the extinction is known, the inverted extinction profile and the path-integrated extinction are uniquely related to the input boundary value....article 1996
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SPIE - The International Society for Optical Engineering (author), Kunz, G.J. (author), Trickle, T. (author)During the MAPTIP experiment, that was organized by NATO AC/243 (Panel 4)/RSG.8, the marine atmosphere was characterized, among others, with lidar (optical radar). The investigations were carried out both in horizontal planes (PPI scans), in vertical planes (RHI scans) and combinations of those two. In addition, the temporal variability of the...conference paper 1996
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Fysisch en Elektronisch Laboratorium TNO (author), Kunz, G.J. (author)The vertical structure of the atmosphere, which is of invaluable interest to meteorologists, geo-physicists and environmental researchers, can be measured with LIDAR. A method has been proposed and applied to invert lidar signals from vertical soundings to height resolved scattering coefficients. In situ measurements have confirmed the...conference paper 1985