Dual Frequency Measurements of Rain-Induced Microwave Attenuation on a 2.6-Kilometer Propagation Path

1971 ◽  
Vol 50 (8) ◽  
pp. 2599-2606 ◽  
Author(s):  
R. A. Semplak
Keyword(s):  
Propagation Path ◽  
Dual Frequency ◽  
Frequency Measurements ◽  
Microwave Attenuation

Millimeter-wave rain sensing networks using dual-frequency measurements

2014 ◽  
Author(s):  
Hung V. Le ◽  
Carlo Capsoni ◽  
Roberto Nebuloni ◽  
Lorenzo Luini ◽  
Takuichi Hirano ◽  
...  
Keyword(s):  
Millimeter Wave ◽  
Dual Frequency ◽  
Frequency Measurements

scholarly journals Raindrop Size Distribution Retrieval Using Joint Dual-Frequency and Dual-Polarization Microwave Links

2019 ◽  
Vol 2019 ◽  
pp. 1-11 ◽  
Author(s):  
Kun Song ◽  
Xichuan Liu ◽  
Taichang Gao ◽  
Binsheng He
Keyword(s):  
Size Distribution ◽  
Rainfall Intensity ◽  
Propagation Path ◽  
Monitoring Systems ◽  
Dual Frequency ◽  
Dual Polarization ◽  
Telecommunication System ◽  
Raindrop Size Distribution ◽  
Raindrop Size ◽  
Theoretical Analyses

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.

Electromagnetic nondestructive evaluation: moving HTS SQUIDs, inducing field nulling and dual frequency measurements

1997 ◽  
Vol 7 (2) ◽  
pp. 3275-3278 ◽  
Author(s):  
C. Carr ◽  
D.McA. McKirdy ◽  
E.J. Romans ◽  
G.B. Donaldson ◽  
A. Cochran
Keyword(s):  
Nondestructive Evaluation ◽  
Dual Frequency ◽  
Frequency Measurements

Rain Sensing Using Dual-Frequency Measurements from Small-Scale Millimeter-Wave Network

2015 ◽  
Vol E98.B (6) ◽  
pp. 1040-1049
Author(s):  
Hung V. LE ◽  
Capsoni CARLO ◽  
Nebuloni ROBERTO ◽  
Luini LORENZO ◽  
Takuichi HIRANO ◽  
...  
Keyword(s):  
Millimeter Wave ◽  
Small Scale ◽  
Dual Frequency ◽  
Frequency Measurements ◽  
Wave Network
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