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Atmospheric and Oceanic Optics

2015 year, number 8

Estimation of aircraft wake vortex parameters from array of radial velocities measured by a coherent Doppler lidar

I.N. Smalikho1, V.A. Banakh1, F. Holzдpfel2, S. Rahm2
1V.E. Zuev Institute of Atmospheric Optics of Siberian Branch of the Russian Academy of Science, 1, Academician Zuev square, Tomsk, 634021, Russia
2Institute of Atmospheric Physics of the German Aerospace Center, 82234, Oberpfaffenhofen Mьnchener StraЯe, 20, Germany
Keywords: когерентный доплеровский лидар, самолетные вихри, coherent Doppler lidar, aircraft wake vortices

Abstract

A modified method of the radial velocities (RV) is offered. On the base of results of the numerical simulation that imitates operation of “Stream Line” and 2-mm pulsed coherent Doppler lidars (PCDL) we analyze accuracy of the estimation of aircraft wake vortex parameters using the RV method. Results are presented of field experiments carried out with the aim to obtain estimates for vortex axis trajectories and dependence of the vortex circulation on time from arrays of the radial velocity measured by these lidars. For the case of 2-mm PCDL we compared results given by methods of velocity envelopes and RV. The limits of applicability of the RV method have been determined.