Results 151 to 160 of about 5,523 (200)
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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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Measuring Co2 Concentration by Airborne Lidar
2021 IEEE International Geoscience and Remote Sensing Symposium IGARSS, 2021CO2 is the most important warming gas in atmosphere, it's meaningful to measure the CO2 concentration with high precise by different sensors. In this manuscript, we introduced the campaign of QHD (Qinhuangdao) flights, which equipped with CO2- IPDA (integrated path of different absorption LIDAR), an in-situ CO2 sensor, thermometer, hygrometer and GPS ...
Tianqi Shi, Ge Han, Xin Ma 0007
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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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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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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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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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Airborne lidar measurements for Cryosat validation
IEEE International Geoscience and Remote Sensing Symposium, 2003Airborne laser measurements provide a detailed capability to measure the geometry of an ice surface with an accuracy of 5-25 cm over a large range of spatial scales (1 m to 100's of km), either as along-track profiles or scanning lidar swath mapping transects, thus providing a useful calibration and validation tool for Cryosat measurements.
René Forsberg +2 more
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Robust watermarking of airborne LiDAR data
Multimedia Tools and Applications, 2018This paper presents a novel robust approach developed specially for watermarking airborne LiDAR data, which consist of a large cloud of geo-referenced points and has some unique characteristics. The approach consists of the following steps: (1) Defining the marker circular areas, in which the watermark bit will be embedded; (2) Dividing the marker ...
Bogdan Lipus, Borut Zalik
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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 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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