Results 61 to 70 of about 20,211 (224)
Doppler wind lidar has played an important role in alerting low-level wind shear (LLW). However, these high-resolution observations are underused in the model-based analysis and forecasting of LLW.
Lanqian Li +6 more
doaj +1 more source
Compact, Engineered 2-Micron Coherent Doppler Wind Lidar Prototype for Field and Airborne Evaluation [PDF]
The state-of-the-art 2-micron coherent Doppler wind lidar breadboard at NASA/LaRC will be engineered and compactly packaged consistent with future aircraft flights.
Amzajerdian, Farzin +2 more
core +1 more source
The study focusses on the morphological evolution of worldwide restored intertidal flats. These intertidal flats initially experience high sedimentation rates after the opening of the connection with open waters. The anthropogenic structures cause high morphological instability and are eroded, leading to a self‐cannibalisation of the system.
Riccardo Brunetta +4 more
wiley +1 more source
Real Time Turbulence Estimation Using Doppler Lidar Measurements
A preliminary work on a new way to estimate atmospheric turbulence using high-frequency Doppler lidar measurements is presented. The turbulence estimations are based on wind reconstruction using 3D Doppler lidar observations and a particle filter.
Rottner Lucie, Baehr Christophe
doaj +1 more source
The ability to perform a number of ecosystem functions is degraded by the inappropriate damming of agricultural floodplains (by levee construction) or by the continuous urban expansion, where flood protection is justified but at the cost of affecting the environmental stability of the wider landscape.
Jiří Jakubínský +17 more
wiley +1 more source
Aircraft Wake Vortex Parametrization Based on 1.5-μm Coherent Doppler Lidar Data
A strategy of measurement by a 1.5-μm pulsed coherent Doppler lidar “Stream Line” has been developed, and a method for estimation of aircraft wake vortices from the lidar data has been proposed.
Banakh V.A., Smalikho I.N.
doaj +1 more source
Compact, High Energy 2-micron Coherent Doppler Wind Lidar Development for NASA's Future 3-D Winds Measurement from Space [PDF]
This paper presents an overview of 2-micron laser transmitter development at NASA Langley Research Center for coherent-detection lidar profiling of winds.
Bai, Yingxin +12 more
core +1 more source
On Wind Directions Estimated by Nacelle Lidar Under Different Reconstruction Methods
ABSTRACT The wind direction is closely linked to the power performance and structural loads of wind turbines. Conventional nacelle‐mounted vanes or sonic anemometers face errors associated with airflow distortions caused by turbine blades. Nacelle‐mounted lidar systems offer line‐of‐sight speed measurements from multiple positions ahead of the rotor ...
Feng Guo +7 more
wiley +1 more source
Design of a Non-scanning Lidar for Wind Velocity and Direction Measurement
A Doppler lidar system for wind velocity and direction measurement is presented. The lidar use a wide field of view (FOV) objective lens as an optical antenna for both beam transmitting and signal receiving.
Liu Bo, Peng Zhangxian
doaj +1 more source
Coherent Doppler Lidar for Precision Navigation of Spacecrafts [PDF]
A fiber-based coherent Doppler lidar, utilizing an FMCW technique, has been developed and its capabilities demonstrated through two successful helicopter flight test campaigns.
Amzajerdian, Farzin +5 more
core +1 more source

