Raindrop Size Distribution Retrieval Using Joint Dual-Frequency and Dual-Polarization Microwave Links
Estimation of raindrop size distribution (DSD) is essential in many meteorological and hydrologic fields. This paper proposes a method for retrieving path-averaged DSD parameters using joint dual-frequency and dual-polarization microwave links of the telecommunication system. Detailed analyses of th...
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| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
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Wiley
2019-01-01
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| Series: | Advances in Meteorology |
| Online Access: | http://dx.doi.org/10.1155/2019/7251870 |
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| author | Kun Song Xichuan Liu Taichang Gao Binsheng He |
| author_facet | Kun Song Xichuan Liu Taichang Gao Binsheng He |
| author_sort | Kun Song |
| collection | DOAJ |
| description | Estimation of raindrop size distribution (DSD) is essential in many meteorological and hydrologic fields. This paper proposes a method for retrieving path-averaged DSD parameters using joint dual-frequency and dual-polarization microwave links of the telecommunication system. Detailed analyses of the rain-induced attenuation calculation are performed based on the T-matrix method. A forward model is established for describing the relation between the DSD and the rain-induced attenuation. Then, the method is proposed to retrieve propagation path DSD parameters based on Levenberg–Marquardt optimization algorithm. The numerical simulation for path-averaged DSD retrieval shows that the RMSEs of three gamma DSD parameters are 0.34 mm−1, 0.81, and 3.21×103 m−3·mm−1, respectively, in rainfall intensity above 30 mm/h. Meanwhile, the method can retrieve the rainfall intensity without the influence of variational DSD. Theoretical analyses and numerical simulations confirm that the method for retrieving path-averaged DSD parameters is promising. The method can complement existing DSD monitoring systems such as the disdrometer and provide high-resolution rainfall measurements with widely distributed microwave links without additional cost. |
| format | Article |
| id | doaj-art-8a1a93044494494e99d6d5a1bc1b996a |
| institution | Kabale University |
| issn | 1687-9309 1687-9317 |
| language | English |
| publishDate | 2019-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Advances in Meteorology |
| spelling | doaj-art-8a1a93044494494e99d6d5a1bc1b996a2025-02-03T01:10:20ZengWileyAdvances in Meteorology1687-93091687-93172019-01-01201910.1155/2019/72518707251870Raindrop Size Distribution Retrieval Using Joint Dual-Frequency and Dual-Polarization Microwave LinksKun Song0Xichuan Liu1Taichang Gao2Binsheng He3College of Meteorology and Oceanography, National University of Defense Technology, Nanjing 211101, ChinaCollege of Meteorology and Oceanography, National University of Defense Technology, Nanjing 211101, ChinaCollege of Meteorology and Oceanography, National University of Defense Technology, Nanjing 211101, ChinaCollege of Meteorology and Oceanography, National University of Defense Technology, Nanjing 211101, ChinaEstimation of raindrop size distribution (DSD) is essential in many meteorological and hydrologic fields. This paper proposes a method for retrieving path-averaged DSD parameters using joint dual-frequency and dual-polarization microwave links of the telecommunication system. Detailed analyses of the rain-induced attenuation calculation are performed based on the T-matrix method. A forward model is established for describing the relation between the DSD and the rain-induced attenuation. Then, the method is proposed to retrieve propagation path DSD parameters based on Levenberg–Marquardt optimization algorithm. The numerical simulation for path-averaged DSD retrieval shows that the RMSEs of three gamma DSD parameters are 0.34 mm−1, 0.81, and 3.21×103 m−3·mm−1, respectively, in rainfall intensity above 30 mm/h. Meanwhile, the method can retrieve the rainfall intensity without the influence of variational DSD. Theoretical analyses and numerical simulations confirm that the method for retrieving path-averaged DSD parameters is promising. The method can complement existing DSD monitoring systems such as the disdrometer and provide high-resolution rainfall measurements with widely distributed microwave links without additional cost.http://dx.doi.org/10.1155/2019/7251870 |
| spellingShingle | Kun Song Xichuan Liu Taichang Gao Binsheng He Raindrop Size Distribution Retrieval Using Joint Dual-Frequency and Dual-Polarization Microwave Links Advances in Meteorology |
| title | Raindrop Size Distribution Retrieval Using Joint Dual-Frequency and Dual-Polarization Microwave Links |
| title_full | Raindrop Size Distribution Retrieval Using Joint Dual-Frequency and Dual-Polarization Microwave Links |
| title_fullStr | Raindrop Size Distribution Retrieval Using Joint Dual-Frequency and Dual-Polarization Microwave Links |
| title_full_unstemmed | Raindrop Size Distribution Retrieval Using Joint Dual-Frequency and Dual-Polarization Microwave Links |
| title_short | Raindrop Size Distribution Retrieval Using Joint Dual-Frequency and Dual-Polarization Microwave Links |
| title_sort | raindrop size distribution retrieval using joint dual frequency and dual polarization microwave links |
| url | http://dx.doi.org/10.1155/2019/7251870 |
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