Navy Atmospheric Measurements for EM Propagation Modeling
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Authors
Frederickson, Paul
Subjects
electromagnetic (EM) propagation
radar performance
evaporation duct
refractivity
Navy Atmospheric Vertical Surface Layer Model (NAVSLaM)
radar performance
evaporation duct
refractivity
Navy Atmospheric Vertical Surface Layer Model (NAVSLaM)
Advisors
Date of Issue
2016
Date
Period of Performance: 11/01/2015-03/31/2017
Publisher
Monterey, California. Naval Postgraduate School
Language
Abstract
The ultimate goal of this project has been to improve characterizations of the battlespace environment for operational U.S. Navy electromagnetic (EM) system performance prediction tools. New and past marine surface layer measurements have been used to test, validate and improve models for characterizing near-surface refractivity and the evaporation duct. The analyses performed during this project have led to demonstrated improvements in the performance of the NPS-developed Navy Atmospheric Vertical Surface Layer Model (NAVSLaM), which characterizes the evaporation duct for EM system prediction models, through the use of new dimensionless profile functions for both unstable and stable conditions. The improved performance was validated by systematic comparisons between NAVLSaM-modeled and measured propagation data (Frederickson 2017a and 2017b). The NPS Vertical Refractivity Profile Blending Algorithm (VRPBA) has also been improved as part of this project (Cherrett et al. 2016 and Frederickson et al. 2016) with capabilities to handle new environmental situations. Lastly, in collaboration with Jon Pozderac of the Ohio State University, the NAVSLaM model has been used to validate and improve the OSU X- band evaporation duct height estimation algorithm (Pozderac et al. 2017). In the month remaining before this project is completed, further analyses and validations will be performed with newly available experimental data from the Coupled Air Sea Processes and EM-ducting Research (CASPER) project. The modeling improvements resulting from this project will lead to more accurate EM system (radar, electronic attack, surveillance, communications, etc.) performance predictions for U.S. Navy warfighters.
Type
Report
Description
Series/Report No
Department
Meteorology
Organization
Naval Research Program
Identifiers
NPS Report Number
NPS-N16-N515
Sponsors
Naval Research Program
Prepared for Topic Sponsor: Office of Naval Research, Research POC Name: Daniel Eleuterio
Prepared for Topic Sponsor: Office of Naval Research, Research POC Name: Daniel Eleuterio
Funder
NPS-N16-N515
Format
Citation
Distribution Statement
Rights
This publication is a work of the U.S. Government as defined in Title 17, United States Code, Section 101. Copyright protection is not available for this work in the United States.