Practical application of an evaporation duct model

Paulus, R. A.

doi:10.1029/rs020i004p00887

Cited by 145 publications

(108 citation statements)

References 8 publications

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“…Results from these codes are known to be erroneous under certain circumstances, but the corrections (Paulus, 1985) have not addressed the problem we discuss here. The straightforward alternative to treating X as an M-O similarity variable is to apply similarity theory to 0 and q, and then to compute refractivity as w,, do in our direct method.…”

Section: Discussionmentioning

confidence: 71%

Potential refractivity as a similarity variable

Cook¹,

Burk²

1992

Boundary-Layer Meteorol

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Section: Discussionmentioning

confidence: 71%

Potential refractivity as a similarity variable

Cook¹,

Burk²

1992

Boundary-Layer Meteorol

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“…The physics behind this profile, based on the Monin-Obukhov similarity theory, is explained elsewhere [7,108,109]. As indicated by Paulus and Anderson [111], (20) is a good practical approximation to the average M( ) profile, and has been widely used as input to the PE propagation model applied under evaporation duct conditions [27,33,40,73,97,[111][112][113][114][115].…”

Section: Modeling Of the Environmentmentioning

confidence: 99%

“…Due to its frequent occurrence and particular importance for ship borne radars and communications, special attention is paid to the evaporation duct modelling. Most often the evaporation duct is modelled by log-linear height profile of the modified refractivity M, with governing parameter the duct thickness [108,109]:…”

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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“…Bulk surface layer models must be used to compute the EDH from basic METOC parameters. The existing EM climatology was computed with the Paulus-Jeske (PJ) model (Paulus 1985). Due to its demonstrated superior performance, we use the NPS evaporation duct model (Frederickson 2000) in constructing the new EM climatology.…”

Section: Approachmentioning

confidence: 99%

Marine EM Climatic Parameters

Barrios

Frederickson

2007

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Recently there has been increased interest within the U.S. Navy in the use of climatology-based products to support the planning and execution of military operations. Climatological databases of atmospheric features that impact electromagnetic (EM) propagation have been developed to provide guidance on weapons and sensor system performance for expected environmental conditions. However, the marine EM propagation climatology currently in use by the U.S. Navy was developed in the mid-1980s, based on a limited dataset and a now obsolete model, and was focused on open ocean regions. Several factors have made it highly important and opportune at this time to develop an improved and modernized EM climatology database: 1) Since the 1980s, when the current EM climatology was last revised, greatly improved meteorological and oceanographic (METOC) databases have been developed from which EM climatologies can be developed.2) At the same time, modern methods of climate analysis have been developed which make climatological databases much more useful for practical applications.3) Evaporation duct models have also been significantly improved. 4) Improved product development tools have been created for translating EM climate information into products that are more useful and relevant for planning and executing warfighter missions. 5) Unlike the 1980s when the current climatology was developed, the U.S. Navy now places a high priority on littoral warfare, and EM climatologies should therefore place more emphasis on coastal regions. 1 Report Documentation PageForm Public reporting burden for the collection of information is estimated to average 1 hour per response, including the time for reviewing instructions, searching existing data sources, gathering and maintaining the data needed, and completing and reviewing the collection of information. Send comments regarding this burden estimate or any other aspect of this collection of information, including suggestions for reducing this burden, to Washington Headquarters Services, Directorate for Information Operations and Reports, 1215 Jefferson Davis Highway, Suite 1204, Arlington VA 22202-4302. Respondents should be aware that notwithstanding any other provision of law, no person shall be subject to a penalty for failing to comply with a collection of information if it does not display a currently valid OMB control number. REPORT DATE SEP 20072. REPORT TYPE

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Practical application of an evaporation duct model

Cited by 145 publications

References 8 publications

Potential refractivity as a similarity variable

Potential refractivity as a similarity variable

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

Marine EM Climatic Parameters

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