Results 61 to 70 of about 1,690 (181)

Nonlinear Kinematic Depth Inversion Coupled With a Spectral Wave Model

Journal of Geophysical Research: Oceans, Volume 131, Issue 8, August 2026.
Abstract We present a bidirectional coupling between a nonlinear kinematic depth inversion method and a phase‐averaged spectral wave model to evaluate the influence of wave nonlinearity over gently sloping nearshore bathymetry. Time‐resolved wave imagery provides spatially varying frequency–wavenumber fields, whereas the simulated significant wave ...
Byunguk Kim, Yong Sung Park, Hyoseob Noh, Seungjun Baek, Juyeong Hur   +4 more
wiley   +1 more source

Comparing triple and single Doppler lidar wind measurements with sonic anemometer data based on a new filter strategy for virtual tower measurements [PDF]

Geoscientific Instrumentation, Methods and Data Systems
In this study, we compare the wind measurements of a virtual tower triple Doppler lidar setup to those of a sonic anemometer located at a height of 90 m above ground on an instrumented tower and with those of two single Doppler lidars to evaluate the ...
K. Wolz, C. Holst, F. Beyrich, E. Päschke, M. Mauder, M. Mauder   +5 more
doaj   +1 more source

Impact of Lidar Data Assimilation on Low-Level Wind Shear Simulation at Lanzhou Zhongchuan International Airport, China: A Case Study

Atmosphere, 2020
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, Ningjing Xie, Longyan Fu, Kaijun Zhang, Aimei Shao, Yi Yang, Xuwei Ren   +6 more
doaj   +1 more source

Flood‐Scale Bedload Transport Dynamics From Acoustic Monitoring Compared With 2D Hydro‐Sedimentary Modeling

Journal of Geophysical Research: Earth Surface, Volume 131, Issue 8, August 2026.
Abstract Accurate estimation of bedload fluxes is critical to understanding sediment transport processes and associated channel evolution in gravel‐bed rivers, however, traditional direct measurements using samplers are time‐consuming and complex. To overcome these limitations, new indirect methods have been developed to estimate fluxes from bedload ...
G. Piasny, P.‐A. Garambois, T. Geay, S. Zanker, L. Schmitt   +4 more
wiley   +1 more source

Aircraft Wake Vortex Parametrization Based on 1.5-μm Coherent Doppler Lidar Data

EPJ Web of Conferences, 2016
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

Saturation Effects in Narrowband Resonance Lidar Measurements, Part 1: Theoretical Consideration of Sodium, Iron, and Helium Lidar Systems

Journal of Geophysical Research: Space Physics, Volume 131, Issue 8, August 2026.
Abstract Atmospheric resonance lidars targeting metallic species in the mesosphere and lower thermosphere have yielded insights into the dynamics of the middle and upper atmosphere for over 50 years. Recently, the technique has been extended to the metastable helium layer, which reaches up to 1,000 km or above.
C. Geach, B. Kaifler
wiley   +1 more source

Design of a Non-scanning Lidar for Wind Velocity and Direction Measurement

EPJ Web of Conferences, 2016
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

Saturation Effects in Narrowband Resonance Lidar Measurements, Part 2: Potassium Lidar Systems and Experimental Results

Journal of Geophysical Research: Space Physics, Volume 131, Issue 8, August 2026.
Abstract Resonance lidars targeting the D1 ${D}_{1}$ resonance line of potassium at 770 nm have been employed over the past 5 decades to yield numerous insights into the dynamics of the middle and upper atmosphere. It has long been recognized that these measurements can be severely affected by nonlinear behavior in the scattering process, that is ...
C. Geach, B. Kaifler, Josef Höffner, G. Baumgarten   +3 more
wiley   +1 more source

Real Time Turbulence Estimation Using Doppler Lidar Measurements

EPJ Web of Conferences, 2016
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

Aeronautics lidar revisited – Towards lidar-based gust and turbulence measurement for aircraft load alleviation control [PDF]

EPJ Web of Conferences
We give an overview of the authors' and their institutions' latest R&D activities regarding Direct-Detection Doppler-Wind-Lidar (DD-DWL) for the usage as remote flow sensor on civil aircraft.
Vrancken P., Bizet L., Boulant Th., Cutipa P., Fezans N., Faccioni M., de Haan H., Jentink H., Kiehn D., Kliebisch O., Linsmayer Ph., Lombard L., Lorbeer R., Michel T., Pichon P., Pouillaude J., Pankan A. S., Thurn J., Tump R., Valla M.   +19 more
doaj   +1 more source