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<br />this research is provided in Table 2.2. While there are limitations to <br /> <br />the automatic cell-tracking routines, they provide useful radar echo <br /> <br />sample characteristics which show general properties of different types <br /> <br />of mesoscale events discussed in Section 3.8. <br /> <br />Table 2.2. - Radar echo variables used to characterize <br />mesoscale classes <br /> <br />Description <br /> <br />Variable code <br /> <br />CTOPAV <br />CTOPMX <br />CBAVG <br />FECRNG <br />FECAZ <br />AZSTOP <br />RNGSTP <br />DIRAVG <br />VELAVG <br />FDUR <br />FECTOP <br />FEAREA <br />CDMAX <br />ZMAX <br />ZMAXHT <br />PETGRA <br />PETGRM <br />CAAVGT <br />CAAVGA <br />MPTVOL <br />MCVIO <br />MCV20 <br />VI0DTM <br />V20DTM <br />D lOMAX <br />D20MAX <br />MAIO <br />MA20 <br />AI0DUR <br />A20DUR <br />TIMEST <br /> <br />Average echo-top height (km) <br />Maximum echo-top height (km) <br />Average echo-base height (km) <br />Range of first echo centroid (km) <br />Azimuth of first echo centroid (deg) <br />Azimuth of echo centroid at termination (deg) <br />Range of echo centroid termination (km) <br />Average direction of echo motion (deg) <br />Average speed of echo centroid (m/s) <br />Echo duration (min) <br />First echo-top height (km) <br />First echo area (km2) <br />Maximum echo depth (km) <br />Maximum radar reflectivity (dBZ) <br />Height of maximum radar reflectivity (km) <br />Average echo-top growth rate (m/s) <br />Maximum echo-top growth rate (m/s) <br />Centroid axis average tilt km/km <br />Centroid axis average azimuth (deg) <br />Total Marshall Palmer estimated rain volume (m3) <br />Maximum echo volume> 10 dBz (m3) <br />Maximum echo volume> 20 dBI (m3) <br />Maximum positive echo volume change for (Z>10 dBZ) <br />(m3fs) <br />Maximum positive echo volume change for (1)20 dBZ) <br />(m3/s) <br />Maximum positive echo area change for Z>10 dBI <br />(m2/s) <br />Maximum positive echo area change for Z>20 dBZ <br />(m2/s) <br />Maximum area with Z>10 dBZ <br />Maximum area with Z>20 dBZ <br />Average duration of 10 dBZ echo <br />Average duration of 20 dBZ echo <br />Time of first echo (hh mm ss) <br /> <br />37 <br />