Results 171 to 180 of about 20,211 (224)

Optimizing a pulsed Doppler lidar

Applied Optics, 1990
NOAA's fieldable injection-seeded, pulsed, coherent CO(2) lidar was developed over a 5-yr period. Its performance and reliability are characterized. Techniques for calibration, alignment, collimation, and for improving detector performance and frequency stability are presented.
M J, Post, R E, Cupp
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Doppler Wind Lidar

2021
Wind lidars use the optical Doppler effect to measure atmospheric wind with high spatial and temporal resolution. In contrast to scalar quantities, such as temperature or humidity, the atmospheric wind is a vector quantity consisting of three components – usually referred to as vertical wind speed, horizontal wind speed, and the horizontal direction ...
Oliver Reitebuch, R. Michael Hardesty
openaire   +1 more source

Airborne Doppler lidar measurements

Applied Optics, 1986
This paper describes recent measurements using coherent Doppler lidars operating at a wavelength of 10.6 microm aboard the NASA Ames Convair 990. The purpose of the measurements was to obtain data on the atmospheric wind fields and the distribution of the backscatter coefficient at 10.6 microm. A description of the instruments is provided detailing the
J W, Bilbro, C, DiMarzio, D, Fitzjarrald, S, Johnson, W, Jones   +4 more
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Airborne cw-Doppler lidar ADOLAR

Conference Proceedings Second Topical Symposium on Combined Optical-Microwave Earth and Atmosphere Sensing, 2002
During the last 10 years the DLR container LDA (Laser Doppler Anemometer) was used for many wind related measurements in the atmospheric boundary layer (Kopp et al., 1984). Based on the experiences on airborne cw-Doppler lidar was developed and tested. Wind field measurements in the boundary layer and signal strength studies were performed. >
Werner, Ch., Rahm, S.
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Doppler lidar atmospheric wind sensor: reevaluation of a 355-nm incoherent Doppler lidar

Applied Optics, 1990
We reevaluate the performance of an incoherent Doppler lidar system operating at 354.7 nm, based on recent but well-proven Nd:YAG laser technology and currently available optical sensors. For measurements in the lower troposphere, up to ~5 km altitude, and also in the Junge-layer of the lower stratosphere, a wind component accuracy of +/- 2 m/s and a ...
D, Rees, I S, McDermid
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Airborne Doppler lidar wind measurements

Conference Digest. 2000 Conference on Lasers and Electro-Optics Europe (Cat. No.00TH8505), 2000
Summary form only given. Study of the atmospheric wind field is fundamental for the understanding and prediction of the weather development. To overcome the spatial limitations of ground based observations, airborne measurements are recognised as excellent tools to study atmospheric processes.
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Airborne cw Doppler Lidar - ADOLAR

Coherent Laser Radar, 1995
For the airborne measurement of the wind field, knowledge of the exact velocity and orientation of the plane is mandatory. Any small deviation in these parameter will cause an error in the estimation of the wind field. The conical scanning airborne cw CO2 Doppler lidar ADOLAR has been designed to gain experience concerning the correction of the ...
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Coherent Doppler Lidar Edge Technique

Coherent Laser Radar, 1995
With a coherent Doppler lidar one can measure both, the aerosol and the velocity profile. For direct detection the edge technique was proposed (Korb et al. 1994) to get information on the velocity too.
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