The Local Radar base reflectivity product is a display of echo intensity (reflectivity) measured in dBZ (decibels). "Reflectivity" is the amount of transmitted power returned to the radar receiver ...

RADAR observations on rain clouds are being made at Cambridge, using a vertically directed beam with a half-width of 3° to half-power, a peak power of 40 kW. with a 1 µsec. pulse on a wave ...