VOL_B

The VOL_B task fills the higher elevations of the hybrid volume providing observations of standard and dual polarization moments for volume products, such as CAPPI.

The task uses high pulse repetition frequency and delivers high quality radial winds in the range of +/- 16 m/s. Due to a high pulse repetition frequency, high elevations, and the modest ranges in use, narrow precipitation spectra are possible. The quality of standard and dual- polarization moments is good. The hybrid volume data of VOL_B offer inputs for a variety of meteorological products.

At higher elevation angles:

The system is less likely to detect second trip echoes or non-meteorological targets and thus, SQI and PMI thresholding is not used for Z data fields by default, unlike in VOL_A.
Enhanced reflectivity Ze is not selected like for short measurement ranges of high elevations as it does not bring significant sensitivity improvements.

The following figure shows the configuration details of the task for a dual polarization system. Blue circles indicate items with different values in single polarization systems.

Figure 1. VOL_B task configuration - dual polarization