Engineering topics
Im, E.
Publications and source records attributed to Im, E..
2nd Generation Airborne Precipitation Radar (APR-2)
Dual-frequency operation with Ku-band (13.4 GHz) and Ka-band (35.6 GHz). Geometry and frequencies chosen to simulate GPM radar. Measures reflectivity at co- and cross-polarizations, and Doppler. Range resolution is approx. 60 m. Horizontal resolution at surface is approx. 1 km. Reflectivity calibration is within 1.5 dB, based on 10 deg sigmaO at Ku-band and Mie scattering calculations in light rain at Ka-band. LDR measurements are OK to near -20 dB; LDR lower than this is likely contaminated by system cross-polarization isolation. Velocity is motion-corrected total Doppler, including particle fall speed. Aliasing can be seen in some places; can usually be dealiased with an algorithm. .
Decadal Survey Tier 2 Mission Study: Summative Progress Report: ACE Radar
No abstract available
Characterization of Ka- and Ku-band sea surface backscatter for GPM radar applications
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Multiparametric airborne radar observations of the melting layer during the Wakasa Bay experiment
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Spectral processing techniques for measuring Doppler velocity of rainfall from a low-earth orbiting satellite
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Multiparametric airborne radar observations of the melting layer during the Wakasa Bay experiment
The NASA/JPL airborne precipitation radar APR-2 (cross-track scanning, dual-frequency - 14 and 35 GHz, Doppler and dual polarization, see Sadowy et al. (2003) for detailed description of the instrument) was operated on the NASA P-3 aircraft during the Wakasa Bay experiment.
Spectral processing techniques for measuring Doppler velocity of rainfall from a low Earth orbiting satellite
The importance of the motion of air masses at all scales of atmospheric circulation has brought substantial development of the Doppler radar technology in the field of precipitation monitoring.
Retrieving rain drop size distribution from dual-frequency wind profiler
In this paper, we develop and test a robust methodology to analyze wind-profiler data that can accurately quantify the 4-dimensional variability of the drop size distribution at resolutions comparable to those of the TRMM and GPM radars.
Measuring vertical rainfall velocity through spaceborne Doppler radar: performance analysis and system requirements
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Development status of the cloud profiling radar for the CloudSat mission
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Instrument concept of NEXRAD In Space (NIS) - a geostationary radar for hurricane studies
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Design and development of a dual-frequency (Ku/Ka), dual-polarization, wide-angle scanning airborne radar antenna system
A compact, dual-frequency, dual-polarization, wide-angle scanning antenna system has been developed as part of an airborne instrument for measuring rainfal.