The Airborne Precipitation Radar 2nd Generation (APR-2) is a dual-frequency (13 GHz & 35 GHz), Doppler, dual-polarization radar system (APR-3 has added W-Band radar capability to APR-2).
It has a downward looking antenna that performs cross track scans, covering a swath that is +/- 25 to each side of the aircraft path. Additional features include: simultaneous dual-frequency, matched beam operation at 13.4 and 35.6 GHz (same as the GPM Dual-Frequency Precipitation Radar), simultaneous measurement of both like- and cross-polarized signals at both frequencies, Doppler operation, and real-time pulse compression (calibrated reflectivity data can be produced for large areas in the field during flight, if necessary).
Instrument specifics
- Status: RETIRED, replaced by APR-3
- Type: Radar
Platform(s)
- DC-8 (retired)
Measurements
- Radar Reflectivity
- Linear Depolarization Radar
- Doppler Velocity
Campaigns flown
- CPEX
- GPM Cold-season Precipitation Experiment (GCPEx)
- GRIP
- NAMMA
- SEAC4RS
Contact
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Keywords
hydrology, cryosphere, precipitation, cloud radar reflectivity, Doppler velocity
