Analysis of lidar backscattering enhancement for pristine hexagonal ice crystals

S. Iwasaki, H. Okamoto

Research output: Contribution to journalConference articlepeer-review

Abstract

We analyze lidar backscattering enhancement for pristine hexagonal ice crystals by using Fraunhofer diffraction based on Kirchhoff's diffraction theory (KD). Our numerical computations show that received power Pr(Z) at the altitude Z in lidar equation is proportional to Z-a, where α is a function of Z, size and shape of particles. Pr(Z) is proportional to Z-1.5 for hexagonal plate and column randomly oriented in horizontal plane at Z=200 m where its aspect ratios are 1/3 and 3 and mode radiuses are 100μm. Our calculations suggest hexagonal ice crystals that have mode radiuses of 100μm and 30μm with perfectly oriented in horizontal plane have anomalous backscattering enhancement compared with a sphere at even high altitude. This might explain the phenomena reported by Platt et. al. (1778).

Original languageEnglish
Pages (from-to)575-582
Number of pages8
JournalProceedings of SPIE - The International Society for Optical Engineering
Volume4153
DOIs
Publication statusPublished - 2001
Externally publishedYes
EventLidar Remote Sensing for Industry and Environment Monitoring - Sendai, Japan
Duration: Oct 9 2000Oct 12 2000

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Computer Science Applications
  • Applied Mathematics
  • Electrical and Electronic Engineering

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