Showing papers by "Robert Meneghini published in 2002"
07 Nov 2002
TL;DR: The objective of the paper is to outline some of the techniques for analyzing dual-wavelength weather radar data with a focus on an approach that uses integral equations that describe the change in the DSD parameters with radar range.
Abstract: A dual-wavelength spaceborne weather radar is expected to be one of the primary instruments on the proposed Global Precipitation Mission, GPM, satellite. In addition, airborne dual-wavelength weather radar data at (13.6, 35 GHz), (10, 35 GHz), (10, 94 GHz) have been or will be acquired within the next several years. The objective of the paper is to outline some of the techniques for analyzing such data with a focus on an approach that uses integral equations that describe the change in the DSD parameters with radar range.
16 citations
07 Nov 2002
TL;DR: In simulating the radar echo in the melting layer of stratiform rain, a melting snowflake is modeled as a spherical non-uniform mixture, prescribed as a stratified-sphere in that the fractional water content is given as a function of the radius of sphere.
Abstract: In simulating the radar echo in the melting layer of stratiform rain, a melting snowflake is modeled as a spherical non-uniform mixture, prescribed as a stratified-sphere in that the fractional water content is given as a function of the radius of sphere. Combined with the melting layer model that depicts the melting fractions and fall velocities of hydrometeors, the radar profiles are produced and then compared with the measurements of TRMM PR and the dual-wavelength airborne radar.
2 citations
24 Jun 2002
TL;DR: In an effort to study the drop size distribution (DSD) a state-of-the-art instrument arrangement was deployed on Wallops Island, VA, and some preliminary results were generated.
Abstract: In an effort to study the drop size distribution (DSD) a state-of-the-art instrument arrangement was deployed on Wallops Island, VA. The instrumentation consisted of a 2.3-km multi-frequency microwave link, three impact disdrometers, and a network of optical and tipping bucket raingauges. A dual-frequency inversion technique was implemented with the link measurements of attenuations at 25 GHz and 38 GHz to estimate the path-average DSD. Concurrently, an X-band, dual-polarization radar, located in the vicinity, collected polarization and reflectivity measurements over the link path. The evaluation of the estimates and measurements generated some preliminary results.
1 citations