Characterization of Aircraft Wake Vortices by 2-μm Pulsed Doppler Lidar

Airborne wind lidar observations over the North Atlantic in 2016 for the pre-launch validation of the satellite mission Aeolus

“…Over the last decade, Doppler wind lidar systems (Reitebuch, 2012a) have emerged as a versatile tool for the range-resolved detection of wind shears (Shangguan et al, 2017), aircraft wake vortices (Köpp et al, 2004;Dolfi-Bouteyre et al, 2009), wind and temperature turbulence (Banakh et al, 2014) as well as gravity waves , amongst other applications. In particular, direct-detection wind lidars have been demonstrated to provide accurate wind information from 25 ground up to altitudes of 60 km (Dou et al, 2014) or even beyond (Baumgarten, 2010;Hildebrand et al, 2012).…”

Aircraft Wake Vortex Parametrization Based on 1.5-μm Coherent Doppler Lidar Data

“…Since SNR has very low values in the case of the Stream Line lidar, the estimates of spectral moments [2] and velocity envelopes [3] rkm VRϕ % obtained from the data measured by the Stream Line lidar at the air field of the Tomsk Airport, as a B737 aircraft crossed the scanning plane at a height of 37 m. We can see that at distances from 250 to 330 m from the lidar, the pair of wake vortices affects the radial velocity.…”

“…The 2-µm PCDL is used most widely for measurement of wake vortex parameters (vortex axis coordinates and circulation) [1]. These parameters were estimated from lidar data by different methods, which are described in [2][3][4][5].…”

Aerosol Backscatter and Extinction Retrieval from Airborne Coherent Doppler Wind Lidar Measurements

“…The coherent DWL deployed on the DLR Falcon 20 research aircraft during SALTRACE is based on a CLR Photonics instrument (Henderson et al, 1993) combined with a two wedge scanner and acquisition system developed at DLR (Köpp et al, 2004;Reitebuch, 2012). The system operates at a wavelength of 2.02254 µm, with a pulse full width at half maximum (FWHM) of 400 ns, a pulse energy of 1-2 mJ, and a repetition frequency of 500 Hz.…”