INTEGRATION METHOD AND RATIO METHOD FOR RETRIEVING EXTINCTION COEFFICIENT FROM LIDAR SIGNALS

Zhao Yanzeng; Hu Yuliang; Zhao Hongjie

doi:10.1007/BF03187616

Impact Factor: 5.8

Volume 1 Issue 1

Jan. 1984

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Article > ADVANCES IN ATMOSPHERIC SCIENCES > 1984 > 1(1): 53-75

INTEGRATION METHOD AND RATIO METHOD FOR RETRIEVING EXTINCTION COEFFICIENT FROM LIDAR SIGNALS

1.
InstituteofAtmosphericPhysics,AcademiaSinica,Beijing,InstituteofAtmosphericPhysics,AcademiaSinica,Beijing,InstituteofAtmosphericPhysics,AcademiaSinica,Beijing

doi: 10.1007/BF03187616

Abstract
References
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Abstract:
New solution techniques to improve the accuracy of quantitatively determining the atmospheric extinction coefficient and the backscattering-to-extinction ratio from lidar signals are developed. The integration method is proposed to analytically retrieve the extinction coefficient at ground level, which has the advantage of eliminating the effect of backscattering fluctuations on the inversion results.The ratio method, on the other hand, deals with the inversion of the vertical distribution of the extinction coefficient. The main idea of this method is to begin with a calculation of the transmittance by eliminating the backscattering through ratioing lidar signals at two elevations, and subsequently derive the extinction coefficient from the transmittance, thus avert from ambiguous results caused by inappropriate assumptions on the backscattering-to-extinction ratio. Observational investigations have demonstrated that the integration method is superior to the slope method in terms of accuracy and stability, and the ratio method is reasonable and feasible as well.
References

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Manuscript History

Manuscript received: 10 January 1984

Manuscript revised: 10 January 1984

通讯作者: 陈斌, bchen63@163.com

1.
沈阳化工大学材料科学与工程学院沈阳 110142

INTEGRATION METHOD AND RATIO METHOD FOR RETRIEVING EXTINCTION COEFFICIENT FROM LIDAR SIGNALS

1. InstituteofAtmosphericPhysics,AcademiaSinica,Beijing,InstituteofAtmosphericPhysics,AcademiaSinica,Beijing,InstituteofAtmosphericPhysics,AcademiaSinica,Beijing

Manuscript received: 1984-01-10
Manuscript revised: 1984-01-10

Abstract: New solution techniques to improve the accuracy of quantitatively determining the atmospheric extinction coefficient and the backscattering-to-extinction ratio from lidar signals are developed. The integration method is proposed to analytically retrieve the extinction coefficient at ground level, which has the advantage of eliminating the effect of backscattering fluctuations on the inversion results.The ratio method, on the other hand, deals with the inversion of the vertical distribution of the extinction coefficient. The main idea of this method is to begin with a calculation of the transmittance by eliminating the backscattering through ratioing lidar signals at two elevations, and subsequently derive the extinction coefficient from the transmittance, thus avert from ambiguous results caused by inappropriate assumptions on the backscattering-to-extinction ratio. Observational investigations have demonstrated that the integration method is superior to the slope method in terms of accuracy and stability, and the ratio method is reasonable and feasible as well.