Low-altitude atmospheric wind measurement from the combined Mie and Rayleigh backscattering by Doppler lidar with an iodine filter

Liu, Zhishen; Wu, Deliang; Liu, Jintao; Zhang, Kailin; Chen, Weibiao; Song, Xiaoquan; Hair, Johnathan W.; She, C. Y.

doi:10.1364/ao.41.007079

Cited by 72 publications

(42 citation statements)

References 19 publications

(24 reference statements)

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…2. A similar technique was successfully applied to a tropospheric lidar system (Liu et al, 1997(Liu et al, , 2002. The Doppler shift for 1 m/s wind speed is about 4 MHz ( λ ∼ 4 pm) at a wavelength of λ = 532.260 nm or λ/λ∼10 −8 .…”

Section: Methods and Instrumental Setupmentioning

confidence: 99%

Doppler Rayleigh/Mie/Raman lidar for wind and temperature measurements in the middle atmosphere up to 80 km

Baumgarten

2010

Atmos. Meas. Tech.

129

View full text Add to dashboard Cite

Abstract.A direct detection Doppler lidar for measuring wind speed in the middle atmosphere up to 80 km with 2 h resolution was implemented in the ALOMAR Rayleigh/Mie/Raman lidar (69 • N, 16 • E). The random error of the line of sight wind is about 0.6 m/s and 10 m/s at 49 km and 80 km, respectively. We use a Doppler Rayleigh Iodine Spectrometer (DoRIS) at the iodine line 1109 (∼532.260 nm). DoRIS uses two branches of intensity cascaded channels to cover the dynamic range from 10 to 100 km altitude. The wind detection system was designed to extend the existing multi-wavelength observations of aerosol and temperature performed at wavelengths of 355 nm, 532 nm and 1064 nm. The lidar uses two lasers with a mean power of 14 W at 532 nm each and two 1.8 m diameter tiltable telescopes. Below about 49 km altitude the accuracy and time resolution is limited by the maximum count rate of the detectors used and not by the number of photons available. We report about the first simultaneous Rayleigh temperature and wind measurements by lidar in the stratoand mesosphere on 17 and 23 January 2009.

show abstract

Section: Methods and Instrumental Setupmentioning

confidence: 99%

Doppler Rayleigh/Mie/Raman lidar for wind and temperature measurements in the middle atmosphere up to 80 km

Baumgarten

2010

Atmos. Meas. Tech.

129

View full text Add to dashboard Cite

show abstract

“…The stability of the laser frequency is obtained by locking the second harmonic of the seeded laser to the mid-point of a wing of Iodine absorption line no. 1109 near 532 nm [15,16], as shown in Fig. 4.…”

Section: The Effect Of the Vibration Isolation System On The Locmentioning

confidence: 74%

“…The pulse laser transmitter of our mobile Doppler wind LIDAR is excited by a dual wavelength seed injection laser and provides a tunable single longitudinal mode with the required frequency stability [15]. The stability of the laser frequency is obtained by locking the second harmonic of the seeded laser to the mid-point of a wing of Iodine absorption line no.…”

Section: The Effect Of the Vibration Isolation System On The Locmentioning

confidence: 99%

Design and Implementation of Vibration Isolation System for Mobile Doppler Wind LIDAR

Song

Chen

Liu

et al. 2013

Journal of the Optical Society of Korea

View full text Add to dashboard Cite

The operation of a Doppler wind LIDAR in a mobile environment is very sensitive to shocks and vibrations, which can cause critical failures such as misalignment of the optical path and damage to optical components. To be able to stabilize the LIDAR and to perform wind field measurements in motion, a shock absorption and vibration isolation system was designed and implemented. The performance of the vehicle-mounted Doppler wind LIDAR was tested in motion, first in a circular test route with a diameter of about 30 m and later in regular expressway traffic. The vibration isolation efficiency of the system was found to be higher than 82% in the main vibration area and shock dynamic deflection was smaller than maximal deflection of the isolator. The stability of the laser locking frequency in the same mobile environment before and after the vibration isolation system installation was also found to be greatly improved. The reliability of the vibration isolation system was confirmed by good results of the analysis of the LIDAR data, in particular the plane position indicator of the line of sight velocity and the wind profile.

show abstract

“…The aerosol concentration can change due to wind shear and evaporationcondensation processes (Ivlev and Dovgalyuk, 1999). For example, small clouds with horizontal characteristic scales of about 1 km can be displaced completely out of their originally occupied volume in 40-200 s by wind with a speed within the range of 5-25 m s −1 (Liu et al, 2002). Clouds could be split up into numerous small clusters at the horizontal scale of one or several kilometers.…”

Section: Introductionmentioning

confidence: 99%

Impact of pitch angle fluctuations on airborne lidar forward sensing along the flight direction

Gurvich

Куликов

2017

Atmos. Meas. Tech.

View full text Add to dashboard Cite

Abstract. Airborne lidar forward sensing along the flight direction can serve for notification of clear air turbulence (CAT) and help to prevent injuries or fatal air accidents. The validation of this concept was presented in the framework of the DELICAT (DEmonstration of LIdar-based CAT detection) project. However, the strong variations in signal level, which were observed during the DELICAT measurements but not explained, sometimes indicated the need of a better understanding the observational errors due to geometrical factors. In this paper, we discuss possible error sources pertinent to this technique, related to fluctuations of the flight parameters, which may lead to strong signal variations caused by the random deviations of the sensing beam from the forward flight trajectory. We analyze the variations in backscattered lidar signal caused by fluctuations of the most important forward-sensing flight parameter, the pitch angle. The fluctuation values considered in the paper correspond to the error limits of the compensational gyro platform used in civil aviation. The part of the pitch angle fluctuations not compensated for by the beam-steering device in the presence of aerosol concentration variations can lead to noticeable signal variations that can be mistakenly attributed to wind shear, turbulence, or fast evolution of the aerosol layer. We formulate the criteria that allow the recognition of signal variations caused by pitch angle fluctuations. Influence of these fluctuations is shown to be stronger for aerosol variations on smaller vertical scales. An example of DELICAT observations indicating a noticeable pitch angle fluctuation impact is presented.

show abstract

Low-altitude atmospheric wind measurement from the combined Mie and Rayleigh backscattering by Doppler lidar with an iodine filter

Cited by 72 publications

References 19 publications

Doppler Rayleigh/Mie/Raman lidar for wind and temperature measurements in the middle atmosphere up to 80 km

Doppler Rayleigh/Mie/Raman lidar for wind and temperature measurements in the middle atmosphere up to 80 km

Design and Implementation of Vibration Isolation System for Mobile Doppler Wind LIDAR

Impact of pitch angle fluctuations on airborne lidar forward sensing along the flight direction

Contact Info

Product

Resources

About