The Doppler Aerosol Wind (DAWN) Airborne, Wind-Profiling Coherent-Detection Lidar System: Overview and Preliminary Flight Results

Kavaya, Michael J.; Beyon, Jeffrey Y.; Koch, Grady J.; Petros, Mulugeta; Petzar, Paul; Singh, Upendra N.; Trieu, Bo C.; Yu, Jirong

doi:10.1175/jtech-d-12-00274.1

Cited by 60 publications

(50 citation statements)

References 24 publications

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“…Regarding airborne wind lidar and radar systems, ground echoes can be exploited to account for systematic pointing errors and to determine the mounting angles of the instrument. Here, the ground surface is used as a zero wind reference, which allows us to estimate the contribution of the aircraft motion to the actual atmospheric wind measurement and hence to correct for inaccuracies in the aircraft attitude data as well as in the instrument's alignment (Bosart et al, 2002;Kavaya et al, 2014;Chouza et al, 2016a;Weiler, 2017). Accurate zero wind correction (ZWC), however, requires precise differentiation between atmospheric and ground return signals in order to prevent systematic errors.…”

Section: O Lux Et Al: Airborne Wind Lidar Observations Over the Normentioning

confidence: 99%

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

et al. 2018

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Abstract. In preparation of the satellite mission Aeolus carried out by the European Space Agency, airborne wind lidar observations have been performed in the frame of the North Atlantic Waveguide and Downstream Impact Experiment (NAWDEX), employing the prototype of the satellite instrument, the ALADIN Airborne Demonstrator (A2D). The direct-detection Doppler wind lidar system is composed of a frequency-stabilized Nd:YAG laser operating at 355 nm, a Cassegrain telescope and a dual-channel receiver. The latter incorporates a Fizeau interferometer and two sequential Fabry-Pérot interferometers to measure line-of-sight (LOS) wind speeds by analysing both Mie and Rayleigh backscatter signals. The benefit of the complementary design is demonstrated by airborne observations of strong wind shear related to the jet stream over the North Atlantic on 27 September and 4 October 2016, yielding high data coverage in diverse atmospheric conditions. The paper also highlights the relevance of accurate ground detection for the Rayleigh and Mie response calibration and wind retrieval. Using a detection scheme developed for the NAWDEX campaign, the obtained ground return signals are exploited for the correction of systematic wind errors. Validation of the instrument performance and retrieval algorithms was conducted by comparison with DLR's coherent wind lidar which was operated in parallel, showing a systematic error of the A2D LOS winds of less than 0.5 m s −1 and random errors from 1.5 (Mie) to 2.7 m s −1 (Rayleigh).

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Section: O Lux Et Al: Airborne Wind Lidar Observations Over the Normentioning

confidence: 99%

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

et al. 2018

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“…The DAWN's first flights were in 2010 aboard the NASA DC-8 (4 engine jet) aircraft to support the Genesis and Rapid Intensification Processes hurricane study. 9,10 Follow-on flights were made with the instrument installed on the UC-12B (2 engine turboprop) aircraft shown in Fig. 1, including the research described here.…”

Section: Lidar Instrument Designmentioning

confidence: 99%

“…6,13,14 Airborne results from DAWN have been checked against dropsondes and flights over a ground-based 915-MHz radar profiler. 9 …”

Section: Lidar Instrument Designmentioning

confidence: 99%

Three-dimensional wind profiling of offshore wind energy areas with airborne Doppler lidar

Koch

Beyon

Cowen

et al. 2014

J. Appl. Rem. Sens.

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Abstract.A technique has been developed for imaging the wind field over offshore areas being considered for wind farming. This is accomplished with an eye-safe 2-μm wavelength coherent Doppler lidar installed in an aircraft. By raster scanning the aircraft over the wind energy area (WEA), a three-dimensional map of the wind vector can be made. This technique was evaluated in 11 flights over the Virginia and Maryland offshore WEAs. Heights above the ocean surface planned for wind turbines are shown to be within the marine boundary layer, and the wind vector is seen to show variation across the geographical area of interest at turbine heights. © The Authors.Published by SPIE under a Creative Commons Attribution 3.0 Unported License. Distribution or reproduction of this work in whole or in part requires full attribution of the original publication, including its DOI.

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“…The history of Doppler wind lidar systems and lidar signal processing at LaRC is quite extensive [2,8,12,17]. It includes the ground-based system Validation Lidar (VALIDAR) [9,10] and the airborne system DAWN [1,2].…”

Section: Doppler Wind Lidar Systems At Nasa Langleymentioning

confidence: 99%

Offshore wind measurements using Doppler aerosol wind lidar (DAWN) at NASA Langley Research Center

Beyon

Koch

Kavaya

2014

Laser Radar Technology and Applications XIX; And Atmospheric Propagation XI

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The latest flight demonstration of Doppler Aerosol Wind Lidar (DAWN) at NASA Langley Research Center (LaRC) is presented. The goal of the campaign was to demonstrate the improvement of DAWN system since the previous flight campaign in 2012 and the capabilities of DAWN and the latest airborne wind profiling algorithm APOLO (Airborne Wind Profiling Algorithm for Doppler Wind Lidar) developed at LaRC. The comparisons of APOLO and another algorithm are discussed utilizing two and five line-of-sights (LOSs), respectively. Wind parameters from DAWN were compared with ground-based radar measurements for validation purposes. The campaign period was June -July in 2013 and the flight altitude was 8 km in inland toward Charlotte, NC, and offshores in Virginia Beach, VA and Ocean City, MD. The DAWN system was integrated into a UC12B with two operators onboard during the campaign.

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The Doppler Aerosol Wind (DAWN) Airborne, Wind-Profiling Coherent-Detection Lidar System: Overview and Preliminary Flight Results

Cited by 60 publications

References 24 publications

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

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

Three-dimensional wind profiling of offshore wind energy areas with airborne Doppler lidar

Offshore wind measurements using Doppler aerosol wind lidar (DAWN) at NASA Langley Research Center

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