NDLI: Hydrometeor Profile Characterization Method for Dual-Frequency Precipitation Radar Onboard the GPM

Content Provider	IEEE Xplore Digital Library
Author	Le, M. Chandrasekar, V.
Copyright Year	1980
Abstract	Profile classification is a critical module in the microphysics retrieval algorithm for the dual-frequency precipitation radar (DPR) that will be onboard the Global Precipitation Measurement (GPM) Core satellite. Hydrometeor profile characterization (HPC or melting region detection) is an important part of profile classification. To accomplish this classification, characteristics of measured dual-frequency ratio DFRm, defined as the difference between measured reflectivity at two frequency channels (Ku- and Ka-bands), were studied for different hydrometeor phases. This paper shows that a DFRm profile can be used to detect the frozen, mixed-phase, and liquid regions. An HPC model is developed in this paper for DPR profile classification using DFRm and its range variability along the height. Data collected by the Second Generation Airborne Precipitation Radar (APR-2) in NASA African Monsoon Multidisciplinary Analysis, Genesis and Rapid Intensification Processes, and Wakasa Bay campaigns are employed in model validation. Signatures of Doppler velocity, as well as the linear depolarization ratio at Ku-band, available for APR-2 data, are used for cross-validation purpose. Comparison of the melting layer top and bottom between the HPC model and the velocity-based estimates shows that they compare well, with a 2% bias. The performance of the HPC method at GPM-DPR observation resolution is evaluated and is shown to be applicable to observation at GPM-DPR resolution. It can be inferred from the analysis presented that the methodology developed in this paper using DFRm is a good candidate for HPC for GPM-DPR.
Sponsorship	IEEE Geoscience and Remote Sensing Society IEEE URSI
Starting Page	3648
Ending Page	3658
Page Count	11
File Size	2047191
File Format	PDF
ISSN	01962892
Volume Number	51
Issue Number	6
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2013-01-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Rain Attenuation Spaceborne radar Frequency measurement Snow Ice melting layer detection Airborne precipitation radar dual-frequency precipitation radar (DPR) Global Precipitation Measurement (GPM) hydrometeor profile characterization (HPC)
Content Type	Text
Resource Type	Article
Subject	Earth and Planetary Sciences Electrical and Electronic Engineering

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