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| Citation: | Ludovic Thobois, Jean-Pierre Cariou. Next Generation Scanning LIDAR Systems for Optimizing Wake Turbulence Separation Minima[J]. Journal of Radars, 2017, 6(6): 689-698. doi: 10.12000/JR17056
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Next Generation Scanning LIDAR Systems for Optimizing Wake Turbulence Separation Minima
DOI: 10.12000/JR17056
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Abstract
Numerous studies have been performed to better understand the behavior of wake vortices with regards to aircraft characteristics and weather conditionsover the pastten years. These studies have led to the development of the aircraft RECATegorization (RECAT) programs in Europe and in USA. Its phase one focused on redefining distance separation matrix with six static aircraft wake turbulence categories instead of three with the current International Civil Aviation Organization (ICAO) regulations. In Europe, the RECAT-EU regulation is now entering under operational implementation atseveral key airports. As proven by several research projects in the past, LIght Detection And Ranging (LIDAR) sensors are considered as the ground truth wake vortex measurements for assessing the safety impact of a new wake turbulence regulation at an airport in quantifying the risks given the local specificities. LIDAR’s can also be used to perform risk monitoring after the implementation. In this paper, the principle to measure wake vortices with scanning coherent Doppler LIDARs is described as well as its dedicated post-processing. Finally the use of WINDCUBELIDAR based solution for supporting the implementation of new wake turbulenceregulation is described along with satisfyingresults that have permitted the monitoring of the wake vortex encounter risk after the implementation of a new wake turbulence regulation.
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References
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- Figure 1. Setup for monitoring wake vortices at airport
- Figure 2. Picture of the WINDCUBE200S LIDAR installationat Paris-Charles de Gaulle airport
- Figure 3. Scanning scenarios used with the WINDCUBE200S LIDAR for the wake vortex data collection at Paris-Charles De Gaulle airport
- Figure 4. Comparison of landed aircrafts and periods of wake measurements of WINDCUBE200S LIDAR
- Figure 5. Histogram of track duration in seconds
- Figure 6. Correlation graphs of the circulations obtained for the left (blue) and right (red) wake vortices by the algorithm for heavy (left) and Jumbo (right) aircrafts
- Figure 7. Decay of circulations obtained for the left (blue) and right (red) wake vortices by the algorithm for heavy (left) and Jumbo (right) aircrafts
- Figure 8. Time evolutions of the positions in X and Z (top left), the vortex span (top right) and of circulations (bottom) of a pair of wake vortices generated by a Jumbo aircraft the 20th November 2015.
- Figure 9. Maps of radial wind measurements provided by the LIDAR showing the evolution of the pair of wake vortices generated by a Jumbo aircraft the 20th of November at 18:40:58, 18:41:17, 18:41:35, 18:41:54, 18:42:13 and 18:43.