Visibility Parameter in Sand/Dust Storms' Radio Wave Attenuation Equations: An Approach for Reliable Visibility Estimation Based on Existing Empirical Equations to Minimize Potential Biases in Calculations

被引:3
|
作者
Mahmood, Hamzah N. [1 ]
Ismail, Widad [1 ]
机构
[1] Univ Sains Malaysia, Sch Elect & Elect Engn, Auto ID Lab, Nibong Tebal 14300, Pulau Pinang, Malaysia
来源
APPLIED SCIENCES-BASEL | 2020年 / 10卷 / 21期
关键词
sand; dust storm (SDS); signal attenuation; visibility; total suspended particles (TSP); DUST STORM; MASS-CONCENTRATION; PROPAGATION; SAND; BACKSCATTER; AEROSOL; ASIA;
D O I
10.3390/app10217530
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
Featured Application Enhancing the techniques of existing empirical equations by relating visibility to Sand/Dust mass concentration for reliable estimations and to minimize potential biases in incorporating calculations. In efforts to structure an expression for wave attenuation under a sand/dust storm, most established calculations pronounce optical visibility as an essential parameter. Although visibility information can be retrieved from weather stations, other commonly encountered sources may present it differently, i.e., as total suspended particles (TSP). Consequently, several empirical equations linking visibility to TSP concentrations were evaluated to address offset tendencies in estimations. In addition to substantiating specific equations, the results revealed that averaging a pair of equations has a 46.09% chance of estimating visibilities with a probability of 37.27%, a relatively low error compared to that achieved by employing single equations, which were found to have a probability of 28.93% with a lesser chance (29.58%) of a low estimation error for the same set of data. The resulting enhancement was evaluated by considering a study on a wireless sensor network's (WSN's) signal performance under vaguely labelled meteorological conditions. The meteorological conditions were converted to visibility using the results' suggestions and were found to be in good agreement with an observation standard set by the China Meteorological Administration (CMA) for sand/dust storm outbreak classifications.
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页码:1 / 15
页数:15
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