Comparison of bright-band models with dual-frequency air-borne radar data

Backscatter and attenuation properties of bright-band are computed at 10 and 34.5 GHz by two bright-band models. The first model assumes spherical particles with the composition of each particle being a uniform mixture of ice, water, and air. The second model assumes concentric spherical particles. Each particle has a snow core covered with water. The computed results are compared with the experimental results obtained by a dual-frequency air-borne radar in the case of tropical storm which was accompanied by bright-band. Three negative exponential type drop-size distributions, i.e. Marshall and Palmer distribution, Joss drizzle distribution, and Joss thunderstorm distribution, are used in the computations. The best agreement between computations and experimental results is obtained by the first model assuming Joss thunderstorm drop-size distribution