Physical constraint method to determine optimal overlap factor of Raman lidar

The determination of vertical distribution of optical properties of clouds and aerosols using the lidar system is affected by the incomplete overlap between the field of view of transmitter i.e. laser beam & the receiver in the near‐field range. Thus, the study of vertical profiles of aerosol optical properties in the lower atmosphere is erroneous without the correction of lidar overlap function. Here we have analysed the effect of overlap using a simple technique proposed by Ansmann and Wandinger to determine overlap function. We have determined the overlap factor for 5 different days of June 2016 and then calculated the mean overlap profile and determined the relative deviation of each day with respect to mean overlap factor. Results reveal that the complete overlap was achieved beyond 300 meters.

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Retrieval of Lidar Overlap Factor using Raman Lidar System

Journal of Korean Society for Atmospheric Environment ◽

10.5572/kosae.2009.25.5.450 ◽

2009 ◽

Vol 25 (5) ◽

pp. 450-458 ◽

Cited By ~ 3

Author(s):

Young-M. Noh ◽

Detlef Muller ◽

Dong-Ho Shin ◽

Kyung-Hwa Lee

Keyword(s):

Raman Lidar ◽

Lidar System ◽

Overlap Factor

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Application of the Finite Element Method in Screening of Body Turn up Heights for Radial Truck Tires

Tire Science and Technology ◽

10.2346/1.2135238 ◽

2001 ◽

Vol 29 (3) ◽

pp. 186-196 ◽

Cited By ~ 5

Author(s):

X. Yan

Keyword(s):

Finite Element Method ◽

Finite Element ◽

Material Model ◽

The Finite Element Method ◽

Truck Tires ◽

Contact Constraint ◽

Nonlinear Mechanical ◽

Critical Regions ◽

Constraint Method ◽

Element Method

Abstract A method is described to predict relative body turn up endurance of radial truck tires using the finite element method. The elastomers in the tire were simulated by incompressible elements for which the nonlinear mechanical properties were described by the Mooney-Rivlin model. The belt, carcass, and bead were modeled by an equivalent orthotropic material model. The contact constraint of a radial tire structure with a flat foundation and rigid rim was treated using the variable constraint method. Three groups of tires with different body turn up heights under inflation and static footprint loading were analyzed by using the finite element method. Based on the detail analysis for stress analysis parameters in the critical regions in the tires, the relative body turn up edge endurance was predicted.

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Synergy of Raman Lidar and Modeled Temperature for Relative Humidity Profiling: Assessment and Uncertainty Analysis

IEEE Transactions on Geoscience and Remote Sensing ◽

10.1109/tgrs.2020.3039689 ◽

2021 ◽

pp. 1-12

Author(s):

Constantino Munoz-Porcar ◽

Michael Sicard ◽

Maria Jose Granados-Munoz ◽

Ruben Barragan ◽

Adolfo Comeron ◽

...

Keyword(s):

Relative Humidity ◽

Uncertainty Analysis ◽

Raman Lidar

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Provably physical-constraint-preserving discontinuous Galerkin methods for multidimensional relativistic MHD equations

Numerische Mathematik ◽

10.1007/s00211-021-01209-4 ◽

2021 ◽

Author(s):

Kailiang Wu ◽

Chi-Wang Shu

Keyword(s):

Discontinuous Galerkin ◽

Discontinuous Galerkin Methods ◽

Mhd Equations ◽

Galerkin Methods ◽

Physical Constraint

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A case study on the vertical distribution and characteristics of aerosols using ground-based raman lidar, satellite and model over Western India

International Journal of Remote Sensing ◽

10.1080/01431161.2021.1938737 ◽

2021 ◽

Vol 42 (17) ◽

pp. 6421-6436

Author(s):

Sourita Saha ◽

Som Sharma ◽

K. Niranjan Kumar ◽

Prashant Kumar ◽

Vaidehi Joshi ◽

...

Keyword(s):

Vertical Distribution ◽

Western India ◽

Raman Lidar ◽

The Vertical Distribution

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Hydrogen gas concentration measurement in small area using raman lidar measurement technnology

EPJ Web of Conferences ◽

10.1051/epjconf/201817601019 ◽

2018 ◽

Vol 176 ◽

pp. 01019 ◽

Cited By ~ 1

Author(s):

Sachiyo Sugimoto ◽

Ippei Asahi ◽

Tatuso Shiina

Keyword(s):

Small Area ◽

Gas Flow ◽

Hydrogen Gas ◽

Measurement Technology ◽

Lidar Measurement ◽

Measurement Point ◽

Raman Lidar ◽

Gas Concentration ◽

Scattering Light ◽

Temporal And Spatial

When change of hydrogen(H2) gas concentration in a certain point is measured, non-contact measurement technology with high temporal and spatial resolution is necessary. In this study, H2 concentration in the small area of <1cm2 under the gas flow was measured by using a Raman lidar. Raman scattering light at the measurement point of 750mm ahead was detected by the Raman lidar. As a result, it was proved that the H2 concentration of more than 100ppm could be successfully measured.

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