Home » Airborne Measurements » Airborne Second Generation Precipitation Radar (APR-2)
Airborne Second Generation Precipitation Radar (APR-2)
AVAILABILITY
operational
REQUEST PROCEDURE
Contact JPL (see contact information below)
Airborne Measurements
Dual-frequency (13 and 35 GHz), Doppler, multi-polarization airborne radar
CONTACT
Steve Durden
JPL
4800 Oak Grove Dr. Pasadena, CA 91109
818-354-4719
sdurden@jpl.nasa.gov
SPECIFICATIONS
ManufacturerJPL - PI: Dr. Eastwood Im
Dimensionstwo standard aircraft racks, one in cabin and one in cargo bay, plus 0.4 m antenna
Weightcargo rack - 430 lbs, ops rack - 137 lbs
Power Source Type110 VAC
Inlet Aperturesnadir-viewing port for antenna
Heating/Cooling Requirementsnominal room temperature, 5-25 degrees C
Airspeed/Altitude Requirementstypical 420 kt, 10 km
Operators Required2
Ground Requirements
Suitable PlatformsAPR-2 has flown on NASA DC-8 and NASA P-3 aircraft.
Data Systemdata are processed in real-time and stored to disk-drive; post-processing includes calibration and geophysical retrievals
Measured Parameterreflectivity (13/35 GHz), Doppler, LDR
Measurement Techniqueradar
Operational Modecross-track scan
Time Resolution1 sec scan time typical
Horizontal Resolution800 m at surface (from 12 km altitude)
Other Resolution60 m range resolution
Precision
Accuracy1 dB
Range
Calibration Methodinternal cal loop, external using ocean surface and light rain
Limitations
REFERENCES
G. A. Sadowy, A. C. Berkun, W. Chun, E. Im, and S. L. Durden, "Development of an advanced airborne precipitation radar," Microwave J., vol. 46, no. 1, pp. 84-98, January 2003.
REMARKS
Operates in cross-track scanning, nadir-looking geometry.
UPDATED ON
3 Sep 2009 13:47