http://www.cnr.it/ontology/cnr/individuo/prodotto/ID276878
Dual-polarized Microwave Signatures of Precipitation from Earth and Space Between 3 GHz to 95 GHz (Abstract/Comunicazione in atti di convegno)
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- Label
- Dual-polarized Microwave Signatures of Precipitation from Earth and Space Between 3 GHz to 95 GHz (Abstract/Comunicazione in atti di convegno) (literal)
- Anno
- 2013-01-01T00:00:00+01:00 (literal)
- Alternative label
V. Chandrasekar (1,2), D. Moisseev (2), L. Baldini (3), N. Bharadwaj (4), F. Junyent (1), M. Le (1), H. Chen (1), R. Bechini (1), M. Vega (5) (2013)
Dual-polarized Microwave Signatures of Precipitation from Earth and Space Between 3 GHz to 95 GHz
in ursi commission f microwave signature 2013, Espoo, Finland, 28-31 October 2013
(literal)
- Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
- V. Chandrasekar (1,2), D. Moisseev (2), L. Baldini (3), N. Bharadwaj (4), F. Junyent (1), M. Le (1), H. Chen (1), R. Bechini (1), M. Vega (5) (literal)
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- Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#titoloVolume
- ursi commission f microwave signature 2013 - Specialist symposium on Microwave Remote Sensing of the Earth, Oceans, and Atmosphere (literal)
- Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#volumeInCollana
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- Google Scholar (literal)
- Abstract (literal)
- Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni
- (1) Colorado State University, 1373, Fort Collins, CO 80523-1373,
(2) University of Helsinki, Helsinki, Finland
(3) Institute of Atmospheric Sciences and Climate, Rome, Italy
(4) ARM Climate Research Facility, Pacific Northwest National Laboratory
(5) NASA Goddard Space Flight Center (literal)
- Titolo
- Dual-polarized Microwave Signatures of Precipitation from Earth and Space Between 3 GHz to 95 GHz (literal)
- Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#curatoriVolume
- Jaan Parks, Martti Hallikanen, Juha Kainulainen, Matti Vaaja, Jaakko Seppanen (literal)
- Abstract
- Backscatter and propagation signatures due to hydrometeors along the propagation path, either
in earth space propagation links , or radar to target volumes has been studied for a long time
specially since the beginnings of radar. However the interest in these propagation properties
have seen renewed interest, especially due to innovative use of dual-polarized propagation
properties. Since the advent of dual-polarization radars, the dual-polarization propagation
properties have become very important. In addition, the innovative uses of dual-polarization
propagation properties to mitigate attenuation effects have led to the building of weather radars
at attenuating frequencies such as X band. The specific attenuation in precipitation is basically
the manifestation of the extinction cross section of the precipitation particles in the path
weighted by the size distribution. The specific differential phase between the two linear
polarization states is the difference in forward scatter amplitudes, weighted by the size
distribution. The attenuation due to rain can be corrected for by measuring the differential
propagation phase. In addition the differential propagation properties are weighted closer to the
volume of precipitation particles than the backscatter effects such as reflectivity. Therefore the
propagation phase measurements are better suited for remote sensing applications.
Thus the dual polarized signatures precipitation have become active area of research. Many
radars are being built to remotely sense precipitation from the lower S band frequencies such as
3 GHz, to the mm wave range such as 35 GHz. Though it is useful to observe differential
propagation phase, it is a challenging measurement. The differential propagation phase is a path
integrated quantity and any observation of the characteristics at a small range is estimated as
range derivatives that makes it noisy.
This paper presents challenges and advantages of dual-polarization propagation measurements
through precipitation from 3 to 95 GHz. Observations made at several frequency bands in
between such as S, C, X, Ku and Ka will be presented. The impact of attenuation on the choice
of polarization state will also be discussed. Subsequently differential propagation properties of
multi-frequency systems will be shown for potential use in space borne observations of
precipitation. (literal)
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