<?xml version="1.0" encoding="ISO-8859-1"?><article xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
<front>
<journal-meta>
<journal-id>0122-5383</journal-id>
<journal-title><![CDATA[CT&F - Ciencia, Tecnología y Futuro]]></journal-title>
<abbrev-journal-title><![CDATA[C.T.F Cienc. Tecnol. Futuro]]></abbrev-journal-title>
<issn>0122-5383</issn>
<publisher>
<publisher-name><![CDATA[Instituto Colombiano del Petróleo (ICP) - ECOPETROL S.A.]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S0122-53832022000100057</article-id>
<article-id pub-id-type="doi">10.29047/01225383.361</article-id>
<title-group>
<article-title xml:lang="en"><![CDATA[CHARACTERIZATION OF A GROUND PENETRATING RADAR SHIELDED ANTENNA USING LABORATORY MEASUREMENTS, FDTD MODELING AND SWARM GLOBAL OPTIMIZATION]]></article-title>
<article-title xml:lang="es"><![CDATA[CARACTERIZACIÓN DE UNA ANTENA BLINDADA DE RADAR DE PENETRACIÓN TERRESTRE UTILIZANDO MEDICIONES DE LABORATORIO, MODELADO FDTD Y OPTIMIZACIÓN GLOBAL DE ENJAMBRE]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Plata-Galvis]]></surname>
<given-names><![CDATA[Andrés-Fernando]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Serrano-Luna]]></surname>
<given-names><![CDATA[Jheyston-Omar]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Ramirez-Silva]]></surname>
<given-names><![CDATA[Ana-Beatriz]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Abreo-Carrillo]]></surname>
<given-names><![CDATA[Sergio-Alberto]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,National Institute of Astrophysics, Optics and Electronics  ]]></institution>
<addr-line><![CDATA[Puebla ]]></addr-line>
<country>México</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Industrial University of Santander Faculty of Physical-Mechanical Engineering ]]></institution>
<addr-line><![CDATA[Bucaramanga Santander]]></addr-line>
<country>Colombia</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>06</month>
<year>2022</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>06</month>
<year>2022</year>
</pub-date>
<volume>12</volume>
<numero>1</numero>
<fpage>57</fpage>
<lpage>67</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.co/scielo.php?script=sci_arttext&amp;pid=S0122-53832022000100057&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.co/scielo.php?script=sci_abstract&amp;pid=S0122-53832022000100057&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.co/scielo.php?script=sci_pdf&amp;pid=S0122-53832022000100057&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="en"><p><![CDATA[ABSTRACT Full Waveform Inversion (FWI) is an optimization method that retrieves high-quality images of the ground's internal electromagnetic properties, such as permittivity, permeability, or conductivity. FWI requirements include an initial subsurface image of the parameters (starting point models), a wave propagation model, a cost function, and the source wavelet used during data acquisition. Usually, the source wavelet is estimated from the acquired data, or modelled from the antenna characteristics. In this study, the materials of the shielded antenna of a commercial Ground Penetrating Radar (GPR), developed by GSSI, are estimated using a global optimization method, from the observation measurements of the source signal. The estimated source is then used to model the wave propagation of the electromagnetic signal, and to estimate the electromagnetic parameters of the SEAM model via FWI. Experimental results show that the soil characteristics with the estimated source and pattern radiations retrieve better quality images than the inversion when the radiation pattern is neglected. In fact, the impact of using the correct source during the inversion is more evident when the initial model is distant from the correct solution.]]></p></abstract>
<abstract abstract-type="short" xml:lang="es"><p><![CDATA[RESUMEN La inversión de forma de onda completa (FWI) es un método de optimización que permite obtener imágenes de alta calidad de las propiedades electromagnéticas internas del suelo, como la permitividad, permeabilidad o conductividad. La FWI requiere una imagen inicial del subsuelo (punto de partida), una ecuación de onda para modelar la propagación de las ondas, una función de costo y la ondícula fuente utilizada en la adquisición de los datos. Por lo general, la ondícula de la fuente se estima a partir de los datos adquiridos o se modela a partir de las características de la antena. En este estudio, se estiman los materiales de una antena blindada de radar de penetración terrestre (GPR) comercial, desarrollado por GSSI, utilizando un método de optimización global. La fuente estimada se utiliza para modelar la propagación de las ondas electromagnéticas y para estimar los parámetros electromagnéticos del modelo SEAM a través de la FWI. Los resultados experimentales muestran que la inversión que incluye la fuente estimada y el patrón de radiación produce imágenes de mejor calidad que la inversión que ignora el patrón de radiación. De hecho, el impacto de usar la fuente correcta durante la inversión es más evidente cuando el modelo inicial está lejos de la solución correcta.]]></p></abstract>
<kwd-group>
<kwd lng="en"><![CDATA[GPR]]></kwd>
<kwd lng="en"><![CDATA[FWI]]></kwd>
<kwd lng="en"><![CDATA[PSO]]></kwd>
<kwd lng="en"><![CDATA[Radiation pattern]]></kwd>
<kwd lng="es"><![CDATA[GPR]]></kwd>
<kwd lng="es"><![CDATA[FW]]></kwd>
<kwd lng="es"><![CDATA[PSO]]></kwd>
<kwd lng="es"><![CDATA[Patrones de Radiación]]></kwd>
</kwd-group>
</article-meta>
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