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This edition is a reprint of the Special Issue published online in the open access journal Remote Sensing (ISSN 2072-4292) from 2016–2017 (available at: http://www.mdpi.com/journal/remotesensing/special issues/rsALS), complemented by selected articles published in Remote Sensing
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Der Prozess des Einmischens von Luft aus der freien Atmosphäre in die konvektive Grenzschicht wird mit Hilfe eines Doppler Lidars und konzeptioneller Ansätze untersucht. Durch detaillierte Betrachtung der Vorgänge an der Oberkante der Grenzschicht einerseits und der quantitativen Erfassung der Wirkung dieser Vorgänge andererseits, konnte eine Erweiterung des Prozessverständnisses erfolgen sowie Möglichkeiten zu einer robusteren numerischen Beschreibung des Prozesses aufgezeigt werden.
Entrainment --- Grenzschicht --- Doppler Lidar --- Einmischen
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Coherent structures are patterns in the wind field of the atmospheric boundary layer. The deployment of two scanning Doppler lidars facilitates the measurement of the horizontal wind field, but the inherent averaging processes complicate an interpretation of the results. To assess the suitability of this technique for coherent structure detection large-eddy simulations are used as a basis for virtual measurements, and the effects of the lidar technique on the wind field structure are analyzed.
Doppler-Lidar --- atmosphärische GrenzschichtDoppler-lidar --- Meteorologie --- large-eddy simulation --- meteorology --- kohärente Strukturen --- boundary layer --- coherent structures --- Grobstruktursimulation
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Pottery, Prehistoric --- Pottery, Ancient --- Bronze age --- Excavations (Archaeology) --- Lidar Mound (Turkey). --- Turkey --- Antiquities.
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In this book we successfully demonstrate a millimeter-precision laser rangefinder using a low-cost photon counter. An application-specific integrated circuit (ASIC) comprises timing circuitry and single-photon avalanche diodes (SPADs) as the photodetectors. For the timing circuitry, a novel binning architecture for sampling the received signal is proposed which mitigates non-idealities that are inherent to a system with SPADs and timing circuitry in one chip.
Photonenzähler --- Laser-EntfernungsmessgerätDistance measurement --- SPAD --- laser rangefinder --- Entfernungsmessung --- LIDAR --- photon counter
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Geodesy. Cartography --- Computer. Automation --- computervisie --- beeldverwerking --- fotogrammetrie --- LiDAR (light detection and ranging)
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Remote sensing --- Topography --- cartography --- Satellites --- Geodesy --- Radar --- Telemetry --- Geometrie --- Imagerie satellitaire --- Lidar
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This Special Issue “Atmospheric Conditions for Wind Energy Applications” hosts papers on aspects of remote sensing for atmospheric conditions for wind energy applications. Wind lidar technology is presented from a theoretical view on the coherent focused Doppler lidar principles. Furthermore, wind lidar for applied use for wind turbine control, wind farm wake, and gust characterizations is presented, as well as methods to reduce uncertainty when using lidar in complex terrain. Wind lidar observations are used to validate numerical model results. Wind Doppler lidar mounted on aircraft used for observing winds in hurricane conditions and Doppler radar on the ground used for very short-term wind forecasting are presented. For the offshore environment, floating lidar data processing is presented as well as an experiment with wind-profiling lidar on a ferry for model validation. Assessments of wind resources in the coastal zone using wind-profiling lidar and global wind maps using satellite data are presented..
complex flow --- Floating Lidar System (FLS) --- mesoscale --- wind energy resources --- variational analysis --- wind turbine --- wind sensing --- wind energy --- wind gusts --- wake --- wind structure --- complex terrain --- global ocean --- remote sensing forecasting --- detached eddy simulation --- five-minute ahead wind power forecasting --- tropical cyclones --- fetch effect --- aerosol --- vertical Light Detection and Ranging --- range gate length --- resource assessment --- field experiments --- remote sensing --- optical flow --- turbulence --- atmospheric boundary layer --- Doppler Wind Lidar --- offshore --- empirical equation --- Lidar --- WindSAT --- coastal wind measurement --- offshore wind speed forecasting --- Doppler wind lidar --- Doppler --- wind --- wind lidar --- cross-correlation --- QuikSCAT --- wind resource assessment --- detecting and tracking --- single-particle --- gust prediction --- NWP model --- velocity-azimuth-display algorithm --- lidar-assisted control (LAC) --- Doppler lidar --- motion estimation --- power performance testing --- lidar --- large-eddy simulations --- wind farm --- coherent Doppler lidar --- wake modeling --- probabilistic forecasting --- control --- NeoWins --- wind turbine controls --- impact prediction --- wind turbine wake --- Hazaki Oceanographical Research Station --- VAD --- virtual lidar --- Doppler radar --- IEA Wind Task 32 --- ASCAT --- wind atlas --- turbulence intensity
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GNSS is often inaccurate and satellite signals are not always available, which results in ambiguous situations. In order to reduce their negative effects on train-borne localization, this work proposes an approach for the detection of tracks, turnouts, and branching directions solely from 2d lidar sensor measurements. The experimental evaluation shows highly correct and complete results. In summary, these detections are sufficient to reduce ambiguity problems in train-borne localization.
lidar-basierte Eisenbahn-Infrastruktur-Detektion (Schienen --- Gleise --- lidar based railway infrastructure detection (rails --- bordautonome Lokalisierung --- Topologie- und Befahrrichtungserkennung --- determination of topology and branching direction --- train-borne localization --- Weichen) --- turnouts) --- tracks
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Upper Carboniferous (Westphalian C/D) fluvial sandstones and Zechstein Ca2 (Stassfurt, second cycle) carbonates represent two important hydrocarbon reservoir units in NW Europe. A better understanding of reservoir quality variations and their spatial variability is crucial to develop successful exploration strategies. In fluvial Westphalian C/D sandstones and Ca2 carbonate reservoirs, the reservoir properties are controlled by diagenetic alterations and intense fracturing.
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