CellClassifier

The CellClassifier implementation is based on the historical signature of hail and convection¹ : high level of reflectivity at a specified height above the melting layer can be used as a signature of hail (and convection in general).

In this implementation, the general signature of convection is fuzzified as a rule strength, which is a product of 2 membership functions (trapezoids):

• Minimal reflectivity required for convection
• Minimum altitude, with respect to the 0 °C isotherm

For simplicity of configuration, the shapes of the trapezoids are fixed. The full rule strength is reached when the reflectivity is 5 dB more than the minimal threshold, and when the height of those reflectivity levels reaches 1 km (0.6 mi) above the minimum altitude.