Hail-Detection Algorithm for the GPM Core Observatory Satellite Sensors
Hail-Detection Algorithm for the GPM Core Observatory Satellite Sensors
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GPM 核心天文台卫星传感器的冰雹检测算法
DOI:
10.1175/jamc-d-16-0368.1
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发表时间:
2017
影响因子:
3
通讯作者:
Mroz K
中科院分区:
文献类型:
--
作者:
Mroz K
By exploiting an abundant number of extreme storms observed simultaneously by the Global Precipitation Measurement (GPM) missionCore Observatorysatellite’s suite of sensors and by the ground-based S-band Next Generation Weather Radar (NEXRAD) network over the continental United States, proxies for the identification of hail are developed from the GPMCore Observatorysatellite observables. The full capabilities of the GPMCore Observatoryare tested by analyzing more than 20 observables and adopting the hydrometeor classification on the basis of ground-based polarimetric measurements being truth. The proxies have been tested using the critical success index (CSI) as a verification measure. The hail-detection algorithm that is based on the mean Ku-band reflectivity in the mixed-phase layer performs the best of all considered proxies (CSI of 45%). Outside the dual-frequency precipitation radar swath, the polarization-corrected temperature at 18.7 GHz shows the greatest potential for hail detection among all GPM Microwave Imager channels (CSI of 26% at a threshold value of 261 K). When dual-variable proxies are considered, the combination involving the mixed-phase reflectivity values at both Ku and Ka bands outperforms all of the other proxies, with a CSI of 49%. The best-performing radar–radiometer algorithm is based on the mixed-phase reflectivity at Ku band and on the brightness temperature (TB) at 10.7 GHz (CSI of 46%). When only radiometric data are available, the algorithm that is based on the TBs at 36.6 and 166 GHz is the most efficient, with a CSI of 27.5%.
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DOI:
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发表时间:
1978
期刊:
影响因子:
--
作者:
A. Heymsfield
通讯作者:
A. Heymsfield
DOI:
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发表时间:
2012
期刊:
Asia-Pacific Environmental Remote Sensing
影响因子:
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作者:
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2007
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发表时间:
2015
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影响因子:
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作者:
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通讯作者:
D. Cecil
影响因子:
3.1
作者:
A. Heymsfield;R. Wright
通讯作者:
A. Heymsfield;R. Wright