Results 191 to 200 of about 52,203 (247)
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Airborne Doppler lidar measurements
Applied Optics, 1986This 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 +4 more
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International Journal of Remote Sensing, 1986
Abstract Through an extensive literature review the results of previous lidar investigations in Australia, Canada, Sweden, the U.S.A. and West Germany have been evaluated. Based on these findings estimates are given for the anticipated depth capability, measurement accuracy and operational constraints for a laser system in U.K. waters. Consideration is
K. MUIRHEAD, A. P. CRACKNELL
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Abstract Through an extensive literature review the results of previous lidar investigations in Australia, Canada, Sweden, the U.S.A. and West Germany have been evaluated. Based on these findings estimates are given for the anticipated depth capability, measurement accuracy and operational constraints for a laser system in U.K. waters. Consideration is
K. MUIRHEAD, A. P. CRACKNELL
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SPIE Proceedings, 2002
Characteristics, facility and first testing results of new multi-purpose oceanography lidar are presented. Lidar includes Q-switched Nd:YAG laser operating at wavelengths 532 and 1064 nm. Lidar registration system records scattered laser radiation with cross and collinear polarization at wavelength 532 nm or the other one.
Andrey M. Alexeev +6 more
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Characteristics, facility and first testing results of new multi-purpose oceanography lidar are presented. Lidar includes Q-switched Nd:YAG laser operating at wavelengths 532 and 1064 nm. Lidar registration system records scattered laser radiation with cross and collinear polarization at wavelength 532 nm or the other one.
Andrey M. Alexeev +6 more
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Airborne cw-Doppler lidar ADOLAR
Conference Proceedings Second Topical Symposium on Combined Optical-Microwave Earth and Atmosphere Sensing, 2002During 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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Conference on Laser and Electrooptical Systems, 1976
The DFVLR-Lidar-System VI is made for airborne use to measure aerosol mass concentration over greater areas than it is possible from ground stations. It consists of a Nd-glass laser as a transmitter and a parabolic mirror as a receiver. Technical data are given in Table I.
C. Werner, W. Michl
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The DFVLR-Lidar-System VI is made for airborne use to measure aerosol mass concentration over greater areas than it is possible from ground stations. It consists of a Nd-glass laser as a transmitter and a parabolic mirror as a receiver. Technical data are given in Table I.
C. Werner, W. Michl
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Airborne Lidar Measurements of Aerosols
Optical Remote Sensing of the Atmosphere, 1993Aerosols are now recognized as having a significant impact on global climate. Aerosols affect climate directly via scattering and absorption, and indirectly through their effect on cloud properties, generally acting in a manner that counteracts the warming induced by greenhouse gases such as CO2[Charlson et al., 1992; Fouquart and Isaka, 1992; Penner ...
William B. Grant +3 more
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Airborne Doppler lidar wind measurements
Conference Digest. 2000 Conference on Lasers and Electro-Optics Europe (Cat. No.00TH8505), 2000Summary 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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Surface Modeling for Airborne Lidar
IGARSS 2020 - 2020 IEEE International Geoscience and Remote Sensing Symposium, 2020Repeat-visit airborne lidar is a powerful tool for change detection in urban and rural environments. In this work, we present a learning-based approach that addresses one of the key challenges in comparing point cloud scans of the same region: handling geometric differences caused by varying sensor position.
Hunter Blanton +2 more
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Airborne LiDAR Data Processing
2016This chapter introduces the main data analysis methods associated with topographic and bathymetric airborne LiDAR systems. Data delivered by these sensors can be of two types: the majority of commercial systems deliver three-dimensional (3D) point clouds (systems referred to as multiecho), whereas a limited number directly provides the whole laser ...
Mallet, Clement +2 more
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Airborne cw Doppler Lidar - ADOLAR
Coherent Laser Radar, 1995For 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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