A Four-Parameter M-Profile Model for the Evaporation Duct Estimation From Radar Clutter

Zhang, Jinpeng; Wu, Zhensen; Zhu, Qinglin; Wang, and Bo

doi:10.2528/pier11012204

Cited by 20 publications

(20 citation statements)

References 20 publications

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“…The occurrence probability of an evaporation duct is up to 89 % at the South China Sea [22]. Electromagnetic wave propagation modeling and atmospheric refractivity environment estimation necessitate a parametric refractivity profile model [23]. The modified refractivity profile for an evaporation duct is usually simulated using the log-linear Paulus-Jeske model [2,6] as follows:…”

Section: Radio Refractivity Environment Modelmentioning

confidence: 99%

Evaporation Duct Retrieval Using Changes in Radar Sea Clutter Power Versus Receiving Height

Zhang¹,

Wu²,

Zhang³

et al. 2012

PIER

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Abstract-A method for retrieving evaporation duct height (EDH) is introduced in this paper. The proposed technique employs the changes in radar sea clutter power observed at different heights as input information. It identifies the EDH associated with the modeled clutter change pattern that best matches measured change patterns. The performance of the method is evaluated in terms of RMS errors in retrieving actual EDHs that range from 0 to 40 m. The comparison of the proposed method with the conventional clutter pattern matching method shows that the former more effectively retrieves actual EDHs.

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Section: Radio Refractivity Environment Modelmentioning

confidence: 99%

Evaporation Duct Retrieval Using Changes in Radar Sea Clutter Power Versus Receiving Height

Zhang¹,

Wu²,

Zhang³

et al. 2012

PIER

Self Cite

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“…Equation (20), however, has been obtained assuming thermally neutral troposphere stratification and does not account for the tropospheric stability effects on the M profile [7,29,33]. Attempts at improving (20) have been made by changing the slope in different parts of the log-linear curve [116,117], thus making it to better fit the experimental profiles and, hence, include the influence of tropospheric stability. Recent efforts of the US Naval Postgraduate School to develop a state-of-the-art bulk evaporation duct model (referred to as NPS model) based on measured (or modeled) values of wind speed, air and sea temperature, relative humidity and atmospheric pressure have led to restoration of high-fidelity profiles and evaporation duct heights [118].…”

Section: Modeling Of the Environmentmentioning

confidence: 99%

Brief review on PE method application to propagation channel modeling in sea environment

Sirkova

2011

Open Engineering

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This work provides an introduction to one of the most widely used advanced methods for wave propagation modeling, the Parabolic Equation (PE) method, with emphasis on its application to tropospheric radio propagation in coastal and maritime regions. The assumptions of the derivation, the advantages and drawbacks of the PE, the numerical methods for solving it, and the boundary and initial conditions for its application to the tropospheric propagation problem are briefly discussed. More details are given for the split-step Fourier-transform (SSF) solution of the PE. The environmental input to the PE, the methods for tropospheric refractivity profiling, their accuracy, limitations, and the average refractivity modeling are also summarized. The reported results illustrate the application of finite element (FE) based and SSF-based solutions of the PE for one of the most difficult to treat propagation mechanisms, yet of great significance for the performance of radars and communications links working in coastal and maritime zones -the tropospheric ducting mechanism. Recent achievements, some unresolved issues and ongoing developments related to further improvements of the PE method application to the propagation channel modeling in sea environment are highlighted.

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“…Considering that the effects of evaporation ducts are manifested in radiowave propagation, it might be feasible to infer the structure of duct from the propagation measurements. Accordingly, a technique named as "refractivity from clutter" (RFC) is presented and developed which can be used to estimate the lower atmospheric refractivity using radar clutter [10][11][12][13][14][15].…”

Section: Introductionmentioning

confidence: 99%

Retrieving Evaporation Duct Heights From Power of Ground-Based GPS Occultation Signal

Wang¹,

Wu²,

Lin³

et al. 2013

PIER M

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Abstract-Evaporation duct is a manifest phenomenon that can affect microwave propagation seriously with low elevation angles near the sea surface. As an important parameter to describe the characteristic of the evaporation duct, duct height can be estimated from radar sea echo using a technique called as "refractivity from clutter". In this study, we proposed a novel approach to estimating the evaporation duct height. The signal power received by a groundbased GPS receiver is used when the GPS satellites rise or set at the local horizon over the sea. A forward propagation model and genetic algorithm are adopted to implement this method. The performance is evaluated via numerical simulation for inferring evaporation duct with different height. The results showed that the proposed method is well effective, especially for the conditions with higher evaporation duct height.

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A Four-Parameter M-Profile Model for the Evaporation Duct Estimation From Radar Clutter

Cited by 20 publications

References 20 publications

Evaporation Duct Retrieval Using Changes in Radar Sea Clutter Power Versus Receiving Height

Evaporation Duct Retrieval Using Changes in Radar Sea Clutter Power Versus Receiving Height

Brief review on PE method application to propagation channel modeling in sea environment

Retrieving Evaporation Duct Heights From Power of Ground-Based GPS Occultation Signal

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