Application of pulsed Doppler lidar in the airport terminal area

2005 ◽  
Author(s):  
Stephen M. Hannon ◽  
Keith S. Barr ◽  
Donald K. Jacob ◽  
Mark W. Phillips
Keyword(s):  
Doppler Lidar ◽  
Pulsed Doppler ◽  
Airport Terminal ◽  
Terminal Area

Evolution of the Monterey Bay Sea-Breeze Layer As Observed by Pulsed Doppler Lidar

1993 ◽  
Vol 50 (24) ◽  
pp. 3959-3982 ◽  
Author(s):  
Robert M. Banta ◽  
Lisa D. Olivier ◽  
David H. Levinson
Keyword(s):  
Sea Breeze ◽  
Monterey Bay ◽  
Doppler Lidar ◽  
Pulsed Doppler

scholarly journals Identification of Aircraft Wake Vortex Based on SVM

2020 ◽  
Vol 2020 ◽  
pp. 1-8
Author(s):  
Weijun Pan ◽  
Zhengyuan Wu ◽  
Xiaolei Zhang
Keyword(s):  
Environmental Parameters ◽  
Classification Model ◽  
Support Vector ◽  
Wake Vortex ◽  
Doppler Lidar ◽  
Pulsed Doppler ◽  
Wind Fields ◽  
Wake Turbulence ◽  
Aircraft Wake ◽  
Separation Standards

The aircraft wake vortex has important influence on the operation of the airspace utilization ratio. Particularly, the identification of aircraft wake vortex using the pulsed Doppler lidar characteristics provides a new knowledge of wake turbulence separation standards. This paper develops an efficient pattern recognition-based method for identifying the aircraft wake vortex measured with the pulsed Doppler lidar. The proposed method is outlined in two stages. (i) First, a classification model based on support vector machine (SVM) is introduced to extract the radial velocity features in the wind fields by combining the environmental parameters. (ii) Then, grid search and cross-validation based on soft margin SVM with kernel tricks are employed to identify the aircraft wake vortex, using the test dataset. The dataset includes wake vortices of various aircrafts collected at the Chengdu Shuangliu International Airport from Aug 16, 2018, to Oct 10, 2018. The experimental results on dataset show that the proposed method can identify the aircraft wake vortex with only a small loss, which ensures the satisfactory robustness in detection performance.

Research on the Influence of Obstacles in the Airport Terminal Area on ILS Ground Station

2014 ◽  
Vol 556-562 ◽  
pp. 4672-4676
Author(s):  
Xian Hao Zhang ◽  
Wei Qi Feng ◽  
Shuo Ling Xiang
Keyword(s):  
Electromagnetic Waves ◽  
Fresnel Zone ◽  
Civil Aviation ◽  
Electromagnetic Environment ◽  
Ground Station ◽  
Radiation Distribution ◽  
Airport Terminal ◽  
Glide Slope ◽  
Zone Radius ◽  
Terminal Area

According to the theory that electromagnetic waves diffract when approaching obstacles, the thesis focuses on the airport terminal area obstacles affection on the performance of Instrument Landing System (ILS). It is done through calculating of the first Fresnel zone radius and clearance and the electromagnetic environment radiation distribution of the ground station via Single-Wedge Model on the basis of combining the Instrument Landing Systemin the civil aviation airport terminal area and abstracted general theoretical model. This research can provide theoretical basis for the arrangement of navigation station and evaluation of the ILS glide slope in a practical airport environment. Therefore, the study is of magnificent importance for the safe operation of the civil aviation airport.

Radiometric calibration of an airborne CO_2 pulsed Doppler lidar with a natural Earth surface

2002 ◽  
Vol 41 (18) ◽  
pp. 3530 ◽  
Author(s):  
Dean R. Cutten ◽  
Jeffry Rothermel ◽  
Maurice A. Jarzembski ◽  
R. Michael Hardesty ◽  
James N. Howell ◽  
...  
Keyword(s):  
Earth Surface ◽  
Doppler Lidar ◽  
Radiometric Calibration ◽  
Pulsed Doppler

scholarly journals Macroscopic Model and Simulation Analysis of Air Traffic Flow in Airport Terminal Area

2014 ◽  
Vol 2014 ◽  
pp. 1-15 ◽  
Author(s):  
Honghai Zhang ◽  
Yan Xu ◽  
Lei Yang ◽  
Hao Liu
Keyword(s):  
Traffic Flow ◽  
Flight Control ◽  
Simulation Analysis ◽  
Air Traffic ◽  
Macroscopic Model ◽  
Transmission Model ◽  
Characteristic Parameters ◽  
Air Traffic Flow ◽  
Airport Terminal ◽  
Terminal Area

We focus on the spatiotemporal characteristics and their evolvement law of the air traffic flow in airport terminal area to provide scientific basis for optimizing flight control processes and alleviating severe air traffic conditions. Methods in this work combine mathematical derivation and simulation analysis. Based on cell transmission model the macroscopic models of arrival and departure air traffic flow in terminal area are established. Meanwhile, the interrelationship and influential factors of the three characteristic parameters as traffic flux, density, and velocity are presented. Then according to such models, the macro emergence of traffic flow evolution is emulated with the NetLogo simulation platform, and the correlativity of basic traffic flow parameters is deduced and verified by means of sensitivity analysis. The results suggest that there are remarkable relations among the three characteristic parameters of the air traffic flow in terminal area. Moreover, such relationships evolve distinctly with the flight procedures, control separations, and ATC strategies.

Amplified reference pulse storage for low-coherence pulsed Doppler lidar

2006 ◽  
Vol 45 (32) ◽  
pp. 8346 ◽  
Author(s):  
Jyi-Lai Shen ◽  
Rainer Künnemeyer
Keyword(s):  
Doppler Lidar ◽  
Pulsed Doppler ◽  
Reference Pulse ◽  
Low Coherence
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