Circular component measurements and particle shape determination: a Monte Carlo simulation study

Yongxiang Hu

doi:10.1117/12.510268

12 January 2004 Circular component measurements and particle shape determination: a Monte Carlo simulation study

Yongxiang Hu

Proceedings Volume 5240, Laser Radar Technology for Remote Sensing; (2004) https://doi.org/10.1117/12.510268
Event: Remote Sensing, 2003, Barcelona, Spain

Abstract

Monitoring aviation safety hazards, such as icing conditions, and retrieving cloud physical properties for climate modeling studies requires cloud thermodynamic phase (water/ice) discrimination. Polarization information from lidar measurement provide such information. Depolarization of lidar backscattering indicates that the scattering cloud particles are non-spherical (i.e., ice clouds). For space based lidar measurements, backscatter from water cloud particles is also depolarized because of multiple scattering. Thus cloud water/ice discrimination is not straight-forward. An alternative method which is less sensitive to multiple scattering is proposed in this study. The new approach is based on the fact that there are big differences in P₄₄ (an element of the scattering phase matrix) at 180° between spherical and non-spherical particles. When the incident beam is left-hand-circularly polarized, backscattering by a nonspherical particle is also left handed. Circular component of backscattering by a spherical particle is right-handed for left-hand-circularly polarized incident beam. Monte Carlo simulations with full Stokes vector indicate that multiple scattering does not affect the sphere/non-sphere determination with this new circular polarization approach.

Citation Download Citation

Yongxiang Hu "Circular component measurements and particle shape determination: a Monte Carlo simulation study", Proc. SPIE 5240, Laser Radar Technology for Remote Sensing, (12 January 2004); https://doi.org/10.1117/12.510268

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available