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برق و الکترونیک::
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Calibration processing, discussed in section 6, is designed to accomplish two major goals: (1) the determination of calibration constants for the three lidar channels, and (2) the application of those calibration constants to produce the profiles of attenuated backscatter coefficients that are used in Level 2 processing.
The Level 1 algorithms section of this document explains how the instrument calibration constants are determined, and attenuated backscatter coefficients at 532 and 1064 nm produced.
There are number of effective methods for deriving particulate extinction and backscatter coefficients from the calibrated, range-corrected lidar signal.
The Level 1 algorithms perform geolocation of the lidar footprint and range determination, followed by determination of instrument calibration constants to produce profiles of attenuated backscatter coefficients.
The outputs of the Level 1 algorithms are attenuated backscatter coefficient profiles for the 532 nm and 1064 nm intensity and for the 532 nm perpendicular (cross-polarized) return, along with information on the uncertainties in these products.
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