2018
DOI: 10.7498/aps.67.20172008
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A new method of measuring boundary value of atmospheric extinction coefficient

Abstract: We construct a nonlinear equation between the return signal and the boundary value of extinction coefficient according to the lidar equation. And according to the nonlinear equation, we put forward a new method to solve the nonlinear equation by using Broyden algorithm. The Broyden algorithm is a concrete application of the quasi-Newton method. It has faster convergence and less iteration times, and does not need to calculate the derivative value. After choosing a suitable initial value, the boundary value can… Show more

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Cited by 6 publications
(1 citation statement)
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“…where k depends on lidar wavelength and aerosol features (we assume k = 1), z is the lidar detection range, z m is the detection range at the calibration point, σ m is the extinction coefficient at the calibration point and the value of this point is acquired by Broyden algorithm, [11] S is the range-corrected lidar signal, and S m is the range-corrected lidar signal at the calibration point. Figure 1 is the lidar system used in this study that is described by Sun et al [12] Figure 2 shows an experimental image in Hefei with high concentrations of aerosol particles illuminated in the air.…”
Section: Traditional Lidar Methods For Visibility Detectionmentioning
confidence: 99%
“…where k depends on lidar wavelength and aerosol features (we assume k = 1), z is the lidar detection range, z m is the detection range at the calibration point, σ m is the extinction coefficient at the calibration point and the value of this point is acquired by Broyden algorithm, [11] S is the range-corrected lidar signal, and S m is the range-corrected lidar signal at the calibration point. Figure 1 is the lidar system used in this study that is described by Sun et al [12] Figure 2 shows an experimental image in Hefei with high concentrations of aerosol particles illuminated in the air.…”
Section: Traditional Lidar Methods For Visibility Detectionmentioning
confidence: 99%