95-GHz cloud radar and lidar systems: Preliminary results of cloud microphysics

Hajime Okamoto, Suginori Iwasaki, Motoaki Yasui, Horoaki Horie, Hiroshi Kuroiwa, Hiroshi Kumagai

Research output: Contribution to journalArticlepeer-review

7 Citations (Scopus)


In this paper, we report the preliminary studies of cloud microphysics by using ground-based 95GHz cloud radar and lidar systems. Although the active sensors are expected to increase our knowledge about clouds, e.g., vertical profiles of clouds, the single use of radar or lidar gives limited information and it is difficult to retrieve the ice water content (IWC) and effective radius of cloud particles. We develop the new method for the combinational use of radar and lidar signals. The algorithm includes the attenuation corrections on both signals which is a long standing problems especially in the analysis of lidar signals. The system enables to retrieve the vertical profiles of effective radius and IWC in each cloud layer. Since both active sensors have dual polarization capabilities, the system provides a unique opportunity to study cloud microphysics from many aspects, e.g., vertical profiles of the relationship between effective radius, IWC and/or depolarization ratio. This system also has a great potential to study aerosol-cloud interaction studies.

Original languageEnglish
Pages (from-to)355-363
Number of pages9
JournalProceedings of SPIE-The International Society for Optical Engineering
Publication statusPublished - 2000
Externally publishedYes

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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