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RISCharacteristics of the Vertical Profiles of Dual-Frequency, Dual-Polarization Radar Data in Stratiform Rain
Publisher: American Meteorological Society
Abstract: Airborne dual-wavelength and dual-polarization radar data are analyzed for measurements taken in stratiform rain in the western Pacific during September 1990. The focus of the paper is on the vertical profiles of the linear ...
Effective Dielectric Constants of Mixed-Phase Hydrometeors
Publisher: American Meteorological Society
Abstract: Melting snow, graupel, and hail are often modeled as uniform mixtures of air?ice?water or ice?water. Two-layered models have also been proposed in which the particle consists of a dry snow or ice core surrounded by water ...
Comparisons of Cross Sections for Melting Hydrometeors as Derived from Dielectric Mixing Formulas and a Numerical Method
Publisher: American Meteorological Society
Abstract: One of the impediments to the interpretation of radar signatures from the melting layer is the uncertainty over the dielectric mixing formula for ice-water mixtures. In the commonly used Maxwell Garnett mixing formula, the ...
An Approach to Estimate the Areal Rain-Rate Distribution from Spaceborne Radar by the Use of Multiple Thresholds
Publisher: American Meteorological Society
Abstract: Estimates of rain rate derived from a spaceborne weather radar will be most reliable over an intermediate range of values. At light or heavy rain rates, where the signal-to-noise ratios are degraded either by small values ...
A Feasibility Study for Simultaneous Estimates of Water Vapor and Precipitation Parameters Using a Three-Frequency Radar
Publisher: American Meteorological Society
Abstract: The radar return powers from a three-frequency radar, with center frequency at 22.235 GHz and upper and lower frequencies chosen with equal water vapor absorption coefficients, can be used to estimate water vapor density ...
Retrieval of Precipitation Profiles from Airborne Radar and Passive Radiometer Measurements: Comparison with Dual-Frequency Radar Measurements
Publisher: American Meteorological Society
Abstract: This study compares precipitation rate profiles derived from a single frequency radar and radiometer with such profiles derived from a dual-frequency radar. Measurements obtained during the 1985?86 CRL/NASA rain measuring ...
Relationship between Horizontal Wind Velocity and Normalized Surface Cross Section Using Data from the HIWRAP Dual-Frequency Airborne Radar
Publisher: American Meteorological Society
A Study of Rain Estimation Methods from Space Using Dual-Wavelength Radar Measurements at Near-Nadir Incidence over Ocean
Publisher: American Meteorological Society
Abstract: A question arising from the recent interest in spaceborne weather radar is what methods can be used to estimate precipitation parameters from space. In this paper, dual-wavelength airborne radar data obtained from flights ...
Experimental Tests of Methods for the Measurement of Rainfall Rate Using an Airborne Dual-Wavelength Radar
Publisher: American Meteorological Society
Abstract: For a spaceborne meteorological radar, the use of frequencies above 10 GHz may be necessary to attain sufficient spatial resolution. As the frequency increases, however, attenuation by rain becomes significant. To extend ...
A Hybrid Surface Reference Technique and Its Application to the TRMM Precipitation Radar
Publisher: American Meteorological Society
Abstract: Satellite weather radars that operate at attenuating wavelengths require an estimate of path attenuation to reconstruct the range profile of rainfall. One such method is the surface reference technique (SRT), by which ...