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| Titel |
Combined MW-IR Precipitation Evolving Technique (PET) of convective rain fields |
| VerfasserIn |
F. Paola, D. Casella, S. Dietrich, A. Mugnai, E. Ricciardelli, F. Romano, P. Sanò |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1561-8633
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| Digitales Dokument |
URL |
| Erschienen |
In: Natural Hazards and Earth System Science ; 12, no. 11 ; Nr. 12, no. 11 (2012-11-29), S.3557-3570 |
| Datensatznummer |
250011210
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| Publikation (Nr.) |
 copernicus.org/nhess-12-3557-2012.pdf |
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| Zusammenfassung |
| This paper describes a new multi-sensor approach for convective rain cell
continuous monitoring based on rainfall derived from Passive Microwave (PM)
remote sensing from the Low Earth Orbit (LEO) satellite coupled with Infrared
(IR) remote sensing Brightness Temperature (TB) from the Geosynchronous (GEO)
orbit satellite. The proposed technique, which we call Precipitation
Evolving Technique (PET), propagates forward in time and space the last
available rain-rate (RR) maps derived from Advanced Microwave Sounding Units
(AMSU) and Microwave Humidity Sounder (MHS) observations by using IR TB maps
of water vapor (6.2 μm) and thermal-IR (10.8 μm) channels
from a
Spinning Enhanced Visible and Infrared Imager (SEVIRI) radiometer. PET is
based on two different modules, the first for morphing and tracking rain
cells and the second for dynamic calibration IR-RR. The Morphing
module uses two consecutive IR data to identify the motion vector to be
applied to the rain field so as to propagate it in time and space, whilst the
Calibration module computes the dynamic relationship between IR and RR in
order to take into account genesis, extinction or size variation of rain
cells. Finally, a combination of the Morphing and Calibration output
provides a rainfall map at IR space and time scale, and the whole procedure is
reiterated by using the last RR map output until a new MW-based rainfall is
available. The PET results have been analyzed with respect to two different
PM-RR retrieval algorithms for seven case studies referring to different
rainfall convective events. The qualitative, dichotomous and continuous
assessments show an overall ability of this technique to propagate rain field
at least for 2–3 h propagation time. |
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