Results 71 to 80 of about 20,430 (225)

Machine Learning Based Prediction of Tropical Cyclone Rapid Intensification in the Western North Pacific: Importance of Data Augmentation and Loss Function

Journal of Geophysical Research: Machine Learning and Computation, Volume 3, Issue 2, April 2026.
Abstract In this study, we developed a TabNet‐based machine learning model to predict tropical cyclone (TC) rapid intensification (RI) in the Western North Pacific. The most significant challenge in predicting RI is the severe class imbalance between rapid and non‐rapid intensification cases, typically 4.2:1 ratio based on 1977–2021 records.
Sanghyeok An, Jiwon Jeong, Seok‐Woo Son, Hyungjun Kim, Jee‐Hoon Jeong, Jin‐Ho Yoon   +5 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

Observation of Mountain Waves and Secondary Gravity Waves in the Mesosphere Lower Thermosphere Above Patagonia

Journal of Geophysical Research: Atmospheres, Volume 131, Issue 6, 28 March 2026.
Abstract We find observational evidence for mountain waves (MWs) and secondary gravity waves (2GWs) in the OH*(3‐1) layer above Tierra del Fuego, Argentina. On the night of 21–22 May 2018, the Advanced Mesospheric Temperature Mapper (AMTM) obtained temperatures at ∼84 ${\sim} 84$ km.
Robert Reichert, Pierre‐Dominique Pautet, Bernd Kaifler, Sebastian Rhode, Jörn Ungermann, Kaoru Sato, Diego Janches, Steven Smith   +7 more
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

Convective Organization in African Easterly Waves Observed During the NAMMA and CPEX‐CV Field Campaigns

Journal of Geophysical Research: Atmospheres, Volume 131, Issue 6, 28 March 2026.
Abstract Fundamental questions remain about where and when convection will occur within African easterly waves. In this study, we aim to better understand the dynamical processes that govern moist convective organization at the meso‐alpha scale in tropical easterly waves using NASA airborne field campaigns and satellite observations.
D. Colón‐Burgos, M. M. Bell
wiley   +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

Coherent Doppler Lidar for Precision Navigation of Spacecrafts [PDF]

, 2011
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, Barnes, Bruce, Hines, Glenn, Lockhard, George, Petway, Larry, Pierrottet, Diego   +5 more
core   +1 more source

Listening to the Atmosphere: Using Infrasound Observations to Infer Atmospheric Conditions

Journal of Geophysical Research: Atmospheres, Volume 131, Issue 5, 16 March 2026.
Abstract The stratosphere and mesosphere are important regions for the prediction of weather at the Earth's surface for medium‐ and long‐range forecasts. The availability of observations in these layers is lower than that of the troposphere, especially for the dynamics. While seeking new observational sources is important, there are existing infrasound
Javier Amezcua, Gil Averbuch, Sven Peter Näsholm, Stephen Arrowsmith   +3 more
wiley   +1 more source

Analysis of airborne Doppler lidar, Doppler radar and tall tower measurements of atmospheric flows in quiescent and stormy weather [PDF]

The first experiment to combine airborne Doppler Lidar and ground-based dual Doppler Radar measurements of wind to detail the lower tropospheric flows in quiescent and stormy weather was conducted in central Oklahoma during four days in June-July 1981 ...
Bluestein, H. B., Doviak, R. J., Eilts, M. D., Mccaul, E. W., Rabin, R., Sundara-Rajan, A., Zrnic, D. S.   +6 more
core   +1 more source

Research study: Severe storms Doppler lidar signal processing [PDF]

Four tasks related to the signal processing aspects of the severe-storms Doppler lidar program are discussed. The development of algorithms for windfield retrieval from Doppler lidar measurements are discussed.
Lee, R. W.
core   +1 more source