Lidar calibration
Item
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Title
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Lidar calibration
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Identifier
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d_2009_2013:696856c9cafb:10154
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identifier
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10441
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Creator
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Chaw, Shuki,
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Contributor
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Barry M. Gross
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Date
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2009
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Language
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English
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Publisher
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City University of New York.
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Subject
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Remote sensing | Atmospheric sciences | calibration | ceilometer | clouds | lidar
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Abstract
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Owing to its inherent low gain detection of the 1064nm channel and a negligible molecular return from the atmosphere, a boundary condition for the retrieval of optical data by inversion cannot be assumed with high confidence as for the other channels in the multiwavelength Mie lidar. It is therefore necessary to evaluate the calibration constant for the 1064nm channel. Two methods of calibration are studied and compared. One method is calibration by high or low clouds. The other method is calibration by a ceilometer which is itself calibrated and co-located at the lidar site. The results are compared with the aerosol optical depth measured by a calibrated sun photometer co-located at the same site as part of the AERONET network at CCNY. In the latter method, all three instruments are located at the same site, there is no issue of atmospheric differences when comparing data but it makes calibration dependent on that of other instruments. Clouds are a natural and frequent occurrence but the lidar system may change between cloud appearances. Both methods have their merits and shortcomings.
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Type
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dissertation
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Source
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2009_2013.csv
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degree
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Ph.D.
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Program
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Engineering
