Results 11 to 20 of about 121,329 (305)

Study of the Algorithm for Wind Shear Detection with Lidar Based on Shear Intensity Factor

Algorithms, 2022
Low-level wind shear is a vital weather process affecting aircraft safety while taking off and landing and is known as the “aircraft killer” in the aviation industry. As a result, effective monitoring and warning are required.
Shijun Zhao, Yulong Shan
doaj   +1 more source

Performance of large-eddy simulations for capturing low-level wind shear at the Hong Kong International Airport for a whole wind-shear (spring) season

Meteorologische Zeitschrift, 2023
The wind-shear reports from pilots from a particular springtime wind-shear season at the Hong Kong International Airport, namely, January to April 2021, are considered in order to study the performance of a meteorological model in large-eddy simulations ...
P.W. Chan, K.K. Lai, Q.S. Li
doaj   +1 more source

Historical analysis (2001–2019) of low‐level wind shear at the Hong Kong International Airport

Meteorological Applications, 2022
This paper analyses over 10,000 quality‐controlled pilot reports of low‐level wind shear (‘wind shear’) at the Hong Kong International Airport (HKIA; ICAO code: VHHH) between 2001 and 2019.
Kai‐Kwong Hon, Pak‐wai Chan
doaj   +1 more source

Low-Level Wind Shear Identification along the Glide Path at BCIA by the Pulsed Coherent Doppler Lidar

Atmosphere, 2020
Low-level wind shear is usually to be a rapidly changing meteorological phenomenon that cannot be ignored in aviation security service by affecting the air speed of landing and take-off aircrafts. The lidar team in Ocean University of China (OUC) carried
Hongwei Zhang, Xiaoying Liu, Qichao Wang, Jianjun Zhang, Zhiqiang He, Xi Zhang, Rongzhong Li, Kailin Zhang, Junwu Tang, Songhua Wu   +9 more
doaj   +1 more source

Low Level Jet Wind Shear in the Sahel [PDF]

International Journal of Engineering Research in Africa, 2013
In the Sahel, a vertical wind shear appears in the dry and in the wet seasons. In Niamey, Niger, during the dry season, the period of strong shears is clearly linked to the Nocturnal Low Level Jet (LLJ) since it occurs in a narrow time period around 06H00 UTC at 60% of the cases reach shears which require an alert to the pilots (higher than 4 ms-1 per ...
Madougou, Saïdou, Saïd, Frédérique, Campistron, Bernard, Kebe, Cheikh Fadel   +3 more
openaire   +2 more sources

Missed Approach, a Safety-Critical Go-Around Procedure in Aviation: Prediction Based on Machine Learning-Ensemble Imbalance Learning

Advances in Meteorology, 2023
The final approach phase of an aircraft accounts for nearly half of all aviation incidents worldwide due to low-level wind shear, heavy downpours, runway excursions, and unsteady approaches.
Afaq Khattak, Pak-Wai Chan, Feng Chen, Haorong Peng, Caroline Mongina Matara   +4 more
doaj   +1 more source

Wind Shear of Low-Level Jets and Their Influence on Manned and Unmanned Fixed-Wing Aircraft during Landing Approach

Atmosphere, 2021
Wind shear at low altitudes represents a potential hazard to landing aircraft. Based on two wind lidar data sets of one year, the occurrence of low-level jets (LLJs), the vertical wind shear and the rotation of the wind direction were analysed. The lidar
Lutz Bretschneider, Rudolf Hankers, Shanna Schönhals, Jens-Michael Heimann, Astrid Lampert   +4 more
doaj   +1 more source

Classification and properties of non-idealized coastal wind profiles – an observational study [PDF]

Wind Energy Science, 2022
Non-idealized wind profiles frequently occur over the Baltic Sea and are important to take into consideration for offshore wind power, as they affect not only the power production but also the loads on the structure and the behavior of the wake behind ...
C. Hallgren, J. Arnqvist, E. Nilsson, S. Ivanell, M. Shapkalijevski, A. Thomasson, H. Pettersson, E. Sahlée   +7 more
doaj   +1 more source

Study on the influence of topography on wind shear numerical simulations based on WRF–CALMET [PDF]

Geoscientific Instrumentation, Methods and Data Systems
This study focuses on the critical issue of low-altitude wind shear, which is vital for aircraft safety during takeoff and landing. Using the WRF–CALMET model, we assess the impact of topography on low-level wind shear at Zhongchuan Airport.
X. Wang, Y. Lei, B. Shi, Z. Wang, X. Li, J. Wang   +5 more
doaj   +1 more source

Brief communication: On the definition of the low-level jet [PDF]

Wind Energy Science, 2023
Low-level jets (LLJs) are examples of non-logarithmic wind speed profiles affecting wind turbine power production, wake recovery, and structural/aerodynamic loading.
C. Hallgren, J. A. Aird, S. Ivanell, H. Körnich, R. J. Barthelmie, S. C. Pryor, E. Sahlée   +6 more
doaj   +1 more source