Observation of Stratiform Rain with 94 GHz and Ka-Band Radars.
Abstract
The project is concerned with observations of stratiform rain at vertical incidence conducted with a 3-mm wavelength Doppler radar and their analysis and interpretation. The data interpretation is dominated by the need to involve Mie scattering functions which exhibit deep oscillations in the raindrop size range. These considerations lead to a method of separating the contributions of raindrops' terminal velocity and air velocity in Doppler spectra obtained from observation of rain at vertical incidence. Measurements of both weak down-updrafts and raindrop size distribution are thus possible in stratiform rain. The change of radar reflectivity and particle vertical velocity through the layer in which snowflakes are melting on their way to becoming raindrops (melting layer) is also analyzed and interpreted. (rh)
Document Details
- Document Type
- Technical Report
- Publication Date
- May 23, 1990
- Accession Number
- ADA225832
Entities
People
- Roger Lhermitte
Organizations
- Rosenstiel School of Marine, Atmospheric, and Earth Science