VOL_A

The VOL_A task is the lower part of the hybrid volume scan VOL_A and VOL_B. It is optimized for precipitation observations and measurements within a range of 250 km. Use a single pulse repetition frequency mode for the maximum quality of Z and dual polarization moments.

Dual polarization systems use the enhanced reflectivity Ze to improve sensitivity. The Z data fields are quality-controlled for maximum rejection of non-meteorological echo. The Z data presents the true fields of precipitation. The combined observations of KDP and Z are used in quantitative rainfall estimates.

In difficult conditions with moving clutter, sea clutter, and interference, you can raise the PMI threshold to as high as 0.55. Try a higher SQI value with some loss of precipitation in the melting layer and in strong convection.

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_A task configuration - dual polarization