Search Results - "Barrios, Amalia"

Refractivity estimation from sea clutter: An invited review by Karimian, Ali, Yardim, Caglar, Gerstoft, Peter, Hodgkiss, William S., Barrios, Amalia E.

“…Non‐standard radio wave propagation in the atmosphere is caused by anomalous changes of the atmospheric refractivity index. In recent years, refractivity from…”
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Multiple Grazing Angle Sea Clutter Modeling by Karimian, A., Yardim, C., Gerstoft, P., Hodgkiss, W. S., Barrios, A. E.

“…Radar clutter in a non-standard atmosphere usually is modeled based on a single grazing angle at each range. Instead, the angular distribution of incident…”
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Estimation of radio refractivity using a multiple angle clutter model by Karimian, Ali, Yardim, Caglar, Hodgkiss, William S., Gerstoft, Peter, Barrios, Amalia E.

“…The common occurrence of a marine boundary layer in coastal regions can affect radio wave propagation significantly. Refractivity from clutter (RFC) techniques…”
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Estimation of surface-based duct parameters from surface clutter using a ray trace approach by Barrios, Amalia

“…This paper describes a technique to estimate, from measured surface clutter, parameters defining a surface‐based duct using a simple ray trace method. The…”
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A terrain parabolic equation model for propagation in the troposphere by Barrios, A.E.

“…A method to model tropospheric radiowave propagation over land in the presence of range-dependent refractivity is presented. The terrain parabolic equation…”
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Low Altitude Propagation Effects - A Validation Study of the Advanced Propagation Model (APM) for Mobile Radio Applications by Barrios, A.E., Anderson, K., Lindem, G.

“…VHF signal strength data from two NOAA weather radio transmitters, located in southern California and southwestern Arizona, were collected over a wide range of…”
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THE TROPICAL AIR–SEA PROPAGATION STUDY (TAPS) by Kulessa, A. S., Barrios, A., Claverie, J., Garrett, S., Haackck, T., Hackcker, J. M., Hansen, H. J., Horgan, K., Hurtaud, Y., Lemon, C., Marshall, R., McGregor, J., McMillan, M., Périard, C., Pourret, V., Price, J., Rogers, L. T., Short, C., Veasey, M., Wiss, V. R.

“…The purpose of the Tropical Air–Sea Propagation Study (TAPS), which was conducted during November–December 2013, was to gather coordinated atmospheric and…”
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Revisiting the refractivity structure matching algorithm for improved EM propagation assessments by Barrios, Amalia

“…Summary form only given. Numerical weather prediction (NWP) models have improved much over the recent years and now offer higher spatial and temporal…”
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A modern global evaporation duct climatology by Frederickson, P.A., Murphree, J.T., Twigg, K.L., Barrios, A.

“…Climatologies of evaporation duct conditions over the worldpsilas ocean areas are important for radar system design studies and operational planning. The…”
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Predicting RF Propagation with Numerical Models by Kammerer, Andrew J., Haack, Tracy, Norris, Rachel, Hansen, Hedley, Kulessa, Andrew, Barrios, Amalia

“…Radio frequency (RF) propagation is highly dependent upon the vertical distribution of moisture along the transmission path. The U.S. Navy employs…”
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Parabolic equation modeling in horizontally inhomogeneous environments by Barrios, A.E.

“…A parabolic equation model has been developed for use in tropospheric radiowave propagation. A simple technique to model range-dependent environments has been…”
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Modeling surface layer turbulence effects at microwave frequencies by Barrios, A.

“…The paper describes two approaches to model surface layer turbulence effects in a marine environment on microwave frequencies. One of the techniques is…”
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Collaborative experiment to improve radar performance modeling: Overview by Barrios, Amalia, Bolderheij, Fok, Derksen, Joris, Horgan, Katherine, van Leijen, Vincent, Marshall, Robert, Navarro, Rick, Rogers, Ted, Schoonderwoerd, Fred, Wilbrink, Tjarda, Williams, Earl, Wiss, Victor

“…In September 2014, researchers at the Space and Naval Warfare Systems Center, Pacific (SSC Pacific), Naval Surface Warfare Center, Dahlgren Division (NSWCDD),…”
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Impact of realistic propagation modeling and mutual coupling effects on estimation of MIMO capacity by Zhengqing Yun, Iskander, M. F., Omaki, N., Barrios, A.

“…This paper describes an overview of recent advances in propagation modeling with some focus on contributions in characterizing challenging communications…”
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Considerations in the development of the advanced propagation model (APM) for U.S. Navy applications by Barrios, A.E.

“…This paper focuses primarily on the advanced propagation model (APM), developed by the Atmospheric Propagation branch at SSC San Diego, and looks at initial…”
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Day Care in Caracas: A Day Care Homes Program Evaluation Report. Volume I: Executive Summary by de Ruesta, Maria Carlota, de Vidal, Amalia Barrios

“…This document provides a summary of a formative evaluation research project concerning the neighborhood day care homes program in Caracas, Venezuela. The…”
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