Results 41 to 50 of about 12,158 (226)

Improving wind speed availability of a six-beam Doppler lidar [PDF]

Wind Energy Science
A simple adaptive variant of the Doppler beam swinging (DBS) method is presented to enhance the availability of wind velocity measurements in profiling lidars.
M. Manami, M. Manami, G. Léa, J. Mann, M. Sjöholm, G. Gorju   +5 more
doaj   +1 more source

First Results from the German Cal/Val Activities for Aeolus [PDF]

EPJ Web of Conferences, 2020
On 22nd August 2018, the European Space Agency (ESA) launched the first direct detection Doppler wind lidar into space. Operating at 355 nm and acquiring signals with a dual channel receiver, it allows wind observations in clear air and particle-laden ...
Baars Holger, Geiß Alexander, Wandinger Ulla, Herzog Alina, Engelmann Ronny, Bühl Johannes, Radenz Martin, Seifert Patric, Ansmann Albert, Martin Anne, Leinweber Ronny, Lehmann Volker, Weissmann Martin, Cress Alexander, Filioglou Maria, Komppula Mika, Reitebuch Oliver   +16 more
doaj   +1 more source

Assessment of Surface-Layer Coherent Structure Detection in Dual-Doppler Lidar Data Based on Virtual Measurements [PDF]

, 2015
Dual-Doppler lidar has become a useful tool to investigate the wind-field structure in two-dimensional planes. However, lidar pulse width and scan duration entail significant and complex averaging in the resulting retrieved wind-field components.
Knigge, Christoph, Kottmeier, Christoph, Raasch, Siegfried, Stawiarski, Christina, Träumner, Katja   +4 more
core   +3 more sources

Assimilation of European and global Mode‐S aircraft observations into the Met Office global deterministic numerical weather prediction model

Quarterly Journal of the Royal Meteorological Society, EarlyView.
European and global Mode‐S aircraft reports have been assimilated into the Met Office global deterministic numerical weather prediction model, improving forecast accuracy for wind, temperature, and geopotential height. This is the first time global Mode‐S network data have been assimilated, which include data from under‐observed regions, and has ...
Elliott Warren, Warren Tennant, Edmund Stone, Joanne Waller, Christopher Thomas, Adam Maycock   +5 more
wiley   +1 more source

Redefining Optimal Coverage Path Planning for FLS‐Equipped AUVs With Deep Reinforcement Learning

Journal of Field Robotics, EarlyView.
ABSTRACT Autonomous Underwater Vehicles (AUVs) have emerged as indispensable tools for a variety of subsea tasks, from habitat monitoring and seabed mapping to infrastructure inspection and mine countermeasures. A fundamental challenge in this field is Coverage Path Planning (CPP), the problem of ensuring complete and efficient area coverage.
Lorenzo Cecchi, Alberto Topini, Alessandro Bucci, Alessandro Ridolfi   +3 more
wiley   +1 more source

Airborne lidar observations supporting the ADM-Aeolus mission for global wind profiling [PDF]

, 2012
The Atmospheric Dynamics Mission ADM-Aeolus of ESA will be the first lidar mission to sense the global wind field from space. The instrument is based on a direct-detection Doppler lidar operating at 354.9 nm with two spectrometers for aerosol/cloud ...
Lemmerz, Christian, Marksteiner, Uwe, Rahm, Stephan, Reitebuch, Oliver, Witschas, Benjamin   +4 more
core  

Doppler lidar observations of sensible heat flux and intercomparisons with a ground-based energy balance station and WRF model output [PDF]

, 2009
This is an open access article - Copyright @ 2009 E. Schweizerbart'sche VerlagsbuchhandlungDuring the Convective and Orographically induced Precipitation Study (COPS), a scanning Doppler lidar was deployed at Achern, Baden-Wüttemberg, Germany from 13th ...
Burton, R, Collier, CG, Davies, F, Davis, JC, Pearson, GN, Russell, A   +5 more
core   +2 more sources

Strategies for Assessing Post‐Wildfire Geomorphic Resilience in Semiarid Rivers

River Research and Applications, EarlyView.
ABSTRACT We review and summarize diverse components of a catchment that can be monitored after wildfire to assess the geomorphic resilience of the river corridor in semiarid regions. We distinguish upland portions of river catchments from river corridors.
Ellen Wohl, Shayla Triantafillou, Alex Thornton‐Dunwoody, Connor Mertz, Katie Larkin, William Keenan, Steven Griffin, Dylan Davis, Lindsey Blehm   +8 more
wiley   +1 more source

Augmented Reality Based Doppler Lidar Data Visualization: Promises and Challenges

EPJ Web of Conferences, 2016
Augmented reality (AR) is a technology in which the enables the user to view virtual content as if it existed in real world. We are exploring the possibility of using this technology to view radial velocities or processed wind vectors from a Doppler wind
Cherukuru N. W., Calhoun R.
doaj   +1 more source

Lidar measurements of yawed-wind-turbine wakes: characterization and validation of analytical models [PDF]

Wind Energy Science, 2020
Wake measurements of a scanning Doppler lidar mounted on the nacelle of a full-scale wind turbine during a wake-steering experiment were used for the characterization of the wake flow, the evaluation of the wake-steering set-up, and the validation of ...
P. Brugger, M. Debnath, A. Scholbrock, P. Fleming, P. Moriarty, E. Simley, D. Jager, J. Roadman, M. Murphy, H. Zong, F. Porté-Agel   +10 more
doaj   +1 more source