APAR Measurements and products
APAR data will be provided in CfRadial format (NetCDF). In addition to the standard radar moments, such as reflectivity, radial velocity, and spectrum width, APAR will also provide the dual-pol variables differential reflectivity, differential phase, specific differential phase, and the cross correlation ratio. Several derived products, such as hydrometeor particle type, precipitation rate, and convectivity and convective/stratiform echo type, will also be available.
|
Variable |
Dimension | Unit | |
| time | time | s | Seconds since volume start |
| range | range | m | Range from instrument to center of gate |
| azimuth | time | deg | Ray azimuth angle |
| elevation | time | deg | Ray elevation angle |
| Radar observations | |||
| DBZ | n_points | dBZ | Reflectivity |
| VEL | n_points | m/s | Doppler velocity |
| WIDTH | n_points | m/s | Spectrum width |
| ZDR | n_points | dB | Differential reflectivity |
| PHIDP | n_points | deg | Differential phase |
| KDP | n_points | deg/km | Specific differential phase |
| RHOHV | n_points | Cross correlation ratio | |
| Derived products | |||
| RATE | n_points | mm/h | Precipitation rate |
| PID | n_points | Hydrometeor particle ID | |