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From the radar meteorology viewpoint, the most important properties for quantitative precipitation estimation of winter events are 3D shape, size, and mass of precipitation particles, as well as the particle size distribution (PSD). In order to measure these properties precisely, optical instruments may be the best choice. The Multi-Angle Snowflake Camera (MASC) is a relatively new instrument equipped...
We present scattering models of snow and ice hydrometeors and computation of full polarimetrie radar variables for winter precipitation using a higher order method of moments (MoM) in the surface integral equation (SIE) formulation. The studies of winter precipitation are based primarily on measurements by a multi-angle snowflake camera (MASC), reconstruction of 3D hydrometeor shapes by means of the...
We present our continued studies of winter precipitation within the MASCRAD (MASC + Radar) project, using multi-angle snowflake camera (MASC), 2D-video disdrometer, computational electromagnetic scattering methods, and state-of-the-art polarimetric radar. We also introduce some recent advancements to the observation and analysis process, and discuss new illustrative results.
We present utilization of the visual hull geometrical method for reconstruction of 3D shapes of snowflakes and ice particles based on high-resolution photographs of an object from multiple angles and the corresponding 2D silhouettes, for the purpose of further scattering analysis. The images are obtained by a multi-angle snowflake camera (MASC). Preliminary results appear to be much more accurate...
We present our ongoing studies of winter precipitation using multi-angle snowflake camera (MASC), 2D-video disdrometer, computational electromagnetic scattering methods, and state-of-the-art polarimetric radars. The newly built and established MASCRAD (MASC + Radar) Snow Field Site is one of the currently best instrumented and most sophisticated field sites for winter precipitation measurements and...
In general, it is very difficult to explain all of the polarimetric radar measurables in winter precipitation simultaneously using spheroidal shape models with specified densities and orientation distributions. In fact, even for Rayleigh scattering, where the spherical or spheroidal shape assumption is reasonable for reflectivity computation, it is not sufficient for computing the full scattering...
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