<?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>2663-3981</journal-id>
<journal-title><![CDATA[Revista cartográfica]]></journal-title>
<abbrev-journal-title><![CDATA[Rev. cartogr.]]></abbrev-journal-title>
<issn>2663-3981</issn>
<publisher>
<publisher-name><![CDATA[Instituto Panamericano de Geografía e Historia]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S2663-39812022000200031</article-id>
<article-id pub-id-type="doi">10.35424/rcarto.i105.1094</article-id>
<title-group>
<article-title xml:lang="pt"><![CDATA[Análise do uso de dados GPS/GLONASS em diferentes métodos de posicionamento por satélites considerando a influência das condições ionosféricas brasileiras]]></article-title>
<article-title xml:lang="en"><![CDATA[Analysis of the use of GPS/GLONASS data for different satellite positioning methods considering the influence of the Brazilian ionospheric conditions]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Jerez]]></surname>
<given-names><![CDATA[Gabriel Oliveira]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Alves]]></surname>
<given-names><![CDATA[Daniele Barroca Marra]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Universidade Estadual Paulista  ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>Brazil</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Universidade Estadual Paulista  ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>Brazil</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>12</month>
<year>2022</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>12</month>
<year>2022</year>
</pub-date>
<numero>105</numero>
<fpage>31</fpage>
<lpage>46</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S2663-39812022000200031&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S2663-39812022000200031&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S2663-39812022000200031&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="pt"><p><![CDATA[Resumo O GLONASS (GLObal NAvigation Satellite System) e o GPS (Global Positioning System) são os sistemas pioneiros de navegação global por satélite. A utilização combinada de dados GPS e GLONASS despertou interesse inicialmente, mas as pesquisas com investigação de ambos os sinais diminuíram muito no final da década de noventa devido à rápida degradação que o GLONASS sofreu. Porém, após um plano de restabelecimento do sistema, em 2011 o GLONASS voltou a contar com constelação completa e cobertura global. Além do restabelecimento, o sistema passou ainda por um processo de modernização, com novas gerações de satélites desenvolvidas, refinamentos dos sistemas de tempo e referência e novas estações de controle instaladas. Além do uso de dados combinados, outros fatores que influenciam a qualidade do posicionamento são os métodos empregados e os erros aos quais os sinais transmitidos estão sujeitos. Em relação aos erros, a ionosfera é uma importante fonte, especialmente para usuários de receptores de simples frequência. Com este cenário, o presente trabalho buscou realizar um estudo sobre o sistema GLONASS, bem como analisar as melhorias apresentadas no posicionamento utilizando seus dados combinados aos dados GPS em diferentes métodos de posicionamento, considerando diferentes condições ionosféricas. De modo geral, foi possível verificar a viabilidade do uso de dados GLONASS combinados ao GPS em todos os métodos de posicionamento avaliados, com melhoria em mais de 97% dos casos analisados para o posicionamento por ponto e em torno de 70% dos casos com posicionamento relativo.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract GLONASS (GLObal NAvigation Satellite System) and GPS (Global Positioning System) are the pioneer satellite navigation systems. The combined use of GPS and GLONASS data initially aroused interest, but research investigating both signals declined greatly in the late nineties due to the fast degradation that GLONASS suffered. However, after a plan to re-establish the system, in 2011 GLONASS returned to a complete constellation and global coverage. In addition to the reestablishment, the system also went through a modernization process, with new generations of satellites being developed, refinements of the time and reference systems and new control stations being installed. Besides the use of combined data, other factors that influence the positioning quality are the methods employed and the errors to which the transmitted signals are subject. Regarding errors, the ionosphere is an important source, especially for users of simple frequency receivers. Considering this scenario, the present work aimed to conduct a study of the GLONASS system, as well as to analyze the improvements presented in the positioning using its data combined with GPS data in different positioning methods, considering different ionospheric conditions. In general, it was possible to verify the viability of using GLONASS data combined with GPS in all the positioning methods evaluated. In general, it was possible to verify the viability of using GLONASS data combined with GPS in all the positioning methods evaluated, with improvement in more than 97% of the cases analyzed for point positioning and around 70% of the cases with relative positioning.]]></p></abstract>
<kwd-group>
<kwd lng="pt"><![CDATA[Posicionamento]]></kwd>
<kwd lng="pt"><![CDATA[GPS/GLONASS]]></kwd>
<kwd lng="pt"><![CDATA[PPP]]></kwd>
<kwd lng="pt"><![CDATA[VRS]]></kwd>
<kwd lng="pt"><![CDATA[Ionosfera]]></kwd>
<kwd lng="en"><![CDATA[Positioning]]></kwd>
<kwd lng="en"><![CDATA[GPS/GLONASS]]></kwd>
<kwd lng="en"><![CDATA[PPP]]></kwd>
<kwd lng="en"><![CDATA[VRS]]></kwd>
<kwd lng="en"><![CDATA[Ionosphere]]></kwd>
</kwd-group>
</article-meta>
</front><back>
<ref-list>
<ref id="B1">
<nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Alves]]></surname>
<given-names><![CDATA[D. B. M.]]></given-names>
</name>
</person-group>
<source><![CDATA[Posicionamento Baseado em redes GPS utilizando o conceito de estação virtual]]></source>
<year>2008</year>
<publisher-name><![CDATA[Universidade Estadual Paulista]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B2">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Alves]]></surname>
<given-names><![CDATA[D. B. M.]]></given-names>
</name>
<name>
<surname><![CDATA[Monico]]></surname>
<given-names><![CDATA[J. F. G.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[GPS/VRS positioning using atmospheric modeling]]></article-title>
<source><![CDATA[GPS Solutions]]></source>
<year>2011</year>
<volume>15</volume>
<numero>3</numero>
<issue>3</issue>
<page-range>253-61</page-range></nlm-citation>
</ref>
<ref id="B3">
<nlm-citation citation-type="">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Alves]]></surname>
<given-names><![CDATA[D. B. M.]]></given-names>
</name>
<name>
<surname><![CDATA[Jerez]]></surname>
<given-names><![CDATA[G. O.]]></given-names>
</name>
<name>
<surname><![CDATA[Setti Junior]]></surname>
<given-names><![CDATA[P. T.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Analysis of multipath index time series using data from Brazilian GNSS stations under different ionospheric conditions]]></article-title>
<source><![CDATA[VIII Simpósio Brasileiro de Geofísica Espacial e Aeronomia e VIII Simpósio de Física e Astronomia do Vale do Paraíba, 2021. Abstract Book of VIII SBGEA &amp; VIII SIMFAST]]></source>
<year>2021</year>
</nlm-citation>
</ref>
<ref id="B4">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Bruyninx]]></surname>
<given-names><![CDATA[C.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Comparing GPS-only with GPS + GLONASS positioning in a regional permanent GNSS network]]></article-title>
<source><![CDATA[GPS Solutions]]></source>
<year>2007</year>
<volume>11</volume>
<numero>2</numero>
<issue>2</issue>
<page-range>97-106</page-range></nlm-citation>
</ref>
<ref id="B5">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Conker]]></surname>
<given-names><![CDATA[R. S.]]></given-names>
</name>
<name>
<surname><![CDATA[El-Arini]]></surname>
<given-names><![CDATA[M. B.]]></given-names>
</name>
<name>
<surname><![CDATA[Hegarty]]></surname>
<given-names><![CDATA[C. J.]]></given-names>
</name>
<name>
<surname><![CDATA[Hsiao]]></surname>
<given-names><![CDATA[T.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Modeling the effects of ionospheric scintillation on GPS/Satellite-Based augmentation system Availability]]></article-title>
<source><![CDATA[Radio Science]]></source>
<year>2003</year>
<volume>38</volume>
<numero>1</numero>
<issue>1</issue>
<page-range>1-23</page-range></nlm-citation>
</ref>
<ref id="B6">
<nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Feairheller]]></surname>
<given-names><![CDATA[S.]]></given-names>
</name>
<name>
<surname><![CDATA[Clark]]></surname>
<given-names><![CDATA[R.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Other Satellite Navigation Systems]]></article-title>
<person-group person-group-type="editor">
<name>
<surname><![CDATA[Kaplan]]></surname>
<given-names><![CDATA[E. D.]]></given-names>
</name>
<name>
<surname><![CDATA[Hegarty]]></surname>
<given-names><![CDATA[C. J.]]></given-names>
</name>
</person-group>
<source><![CDATA[Understanding GPS: Principles and Applications]]></source>
<year>2006</year>
<edition>2 ed.</edition>
<page-range>595-634</page-range><publisher-loc><![CDATA[Norwood ]]></publisher-loc>
<publisher-name><![CDATA[Artech House]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B7">
<nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Hofmann-Wellenhof]]></surname>
<given-names><![CDATA[B.]]></given-names>
</name>
<name>
<surname><![CDATA[Lichtenegger]]></surname>
<given-names><![CDATA[H.]]></given-names>
</name>
<name>
<surname><![CDATA[Wasle]]></surname>
<given-names><![CDATA[E.]]></given-names>
</name>
</person-group>
<source><![CDATA[GNSS-Global Navigation Satellite Systems GPS, GLONASS, Galileo and more]]></source>
<year>2008</year>
<publisher-loc><![CDATA[New York ]]></publisher-loc>
<publisher-name><![CDATA[Springer-Verlag]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B8">
<nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Jerez]]></surname>
<given-names><![CDATA[G. O.]]></given-names>
</name>
</person-group>
<source><![CDATA[Análise da integração GPS/GLONASS para posicionamento sob efeito de cintilação ionosférica]]></source>
<year>2017</year>
<publisher-name><![CDATA[Universidad Estadual Paulista]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B9">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Jerez]]></surname>
<given-names><![CDATA[G. O.]]></given-names>
</name>
<name>
<surname><![CDATA[Alves]]></surname>
<given-names><![CDATA[D. B. M.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[GLONASS: Revisão teórica e estado da arte]]></article-title>
<source><![CDATA[Revista Brasileira de Geomática]]></source>
<year>2018</year>
<numero>6</numero>
<issue>6</issue>
<page-range>155-73</page-range></nlm-citation>
</ref>
<ref id="B10">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Jerez]]></surname>
<given-names><![CDATA[G. O.]]></given-names>
</name>
<name>
<surname><![CDATA[Alves]]></surname>
<given-names><![CDATA[D. B. M.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Generation and performance analysis of GPS and GLONASS virtual data for positioning under ionospheric influence]]></article-title>
<source><![CDATA[Boletim de Ciências Geodésicas]]></source>
<year>2019</year>
<numero>25</numero>
<issue>25</issue>
<page-range>1-17</page-range></nlm-citation>
</ref>
<ref id="B11">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Jerez]]></surname>
<given-names><![CDATA[G. O.]]></given-names>
</name>
<name>
<surname><![CDATA[Alves]]></surname>
<given-names><![CDATA[D. B. M.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Assessment of GPS/GLONASS point positioning in Brazilian regions with distinct ionospheric behavior]]></article-title>
<source><![CDATA[Boletim de Ciências Geodésicas]]></source>
<year>2020</year>
<numero>26</numero>
<issue>26</issue>
<page-range>1-15</page-range></nlm-citation>
</ref>
<ref id="B12">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Jerez]]></surname>
<given-names><![CDATA[G. O.]]></given-names>
</name>
<name>
<surname><![CDATA[Alves]]></surname>
<given-names><![CDATA[D. B. M.]]></given-names>
</name>
<name>
<surname><![CDATA[Tachibana]]></surname>
<given-names><![CDATA[V. M.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Multivariate analysis of combined GPS/GLONASS point positioning performance in Brazilian regions under different ionospheric conditions]]></article-title>
<source><![CDATA[Journal of Atmospheric and Solar-Terrestrial Physics]]></source>
<year>2019</year>
<numero>187</numero>
<issue>187</issue>
<page-range>1-9</page-range></nlm-citation>
</ref>
<ref id="B13">
<nlm-citation citation-type="">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Jerez]]></surname>
<given-names><![CDATA[G. O.]]></given-names>
</name>
<name>
<surname><![CDATA[Alves]]></surname>
<given-names><![CDATA[D. B. M.]]></given-names>
</name>
<name>
<surname><![CDATA[Vieira]]></surname>
<given-names><![CDATA[J. V. E.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Avaliação do posicionamento relativo GPS/GLONASS sob influência ionosférica]]></article-title>
<source><![CDATA[COBRAC 2018, 13º Congresso Brasileiro de Cadastro Técnico Multifinalitário e Gestão Territorial, 2018]]></source>
<year>2018</year>
<page-range>1-18</page-range></nlm-citation>
</ref>
<ref id="B14">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Jerez]]></surname>
<given-names><![CDATA[G. O.]]></given-names>
</name>
<name>
<surname><![CDATA[Vieira]]></surname>
<given-names><![CDATA[J. V. E.]]></given-names>
</name>
<name>
<surname><![CDATA[Alves]]></surname>
<given-names><![CDATA[D. B. M.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Análise do posicionamento por ponto preciso com dados GPS e GLONASS em diferentes latitudes]]></article-title>
<source><![CDATA[Anuário do Instituto de Geociências]]></source>
<year>2020</year>
<numero>43</numero>
<issue>43</issue>
<page-range>55-65</page-range></nlm-citation>
</ref>
<ref id="B15">
<nlm-citation citation-type="">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Jerez]]></surname>
<given-names><![CDATA[G. O.]]></given-names>
</name>
<name>
<surname><![CDATA[Alves]]></surname>
<given-names><![CDATA[D. B. M.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Monitoramento da atividade ionosférica utilizando índices de multicaminho]]></article-title>
<source><![CDATA[VII Simpósio Brasileiro de Ciências Geodésicas e Tecnologias da Geoinformação, 2018, Anais do VII SIMGEO, 2018]]></source>
<year>2018</year>
<page-range>695-703</page-range></nlm-citation>
</ref>
<ref id="B16">
<nlm-citation citation-type="">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Jerez]]></surname>
<given-names><![CDATA[G. O.]]></given-names>
</name>
<name>
<surname><![CDATA[Alves]]></surname>
<given-names><![CDATA[D. B. M.]]></given-names>
</name>
<name>
<surname><![CDATA[Pereira]]></surname>
<given-names><![CDATA[V. A. S.]]></given-names>
</name>
<name>
<surname><![CDATA[Souza]]></surname>
<given-names><![CDATA[A. L. C.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Investigação da relação entre os índices de multicaminho dos sinais GNSS e os efeitos ionosféricos]]></article-title>
<source><![CDATA[XXVII Congresso Brasileiro de Cartografia e XXVI Exposicarta, XXVII Congresso Brasileiro de Cartografia e XXVI Exposicarta, 2017]]></source>
<year>2017</year>
<page-range>83-7</page-range></nlm-citation>
</ref>
<ref id="B17">
<nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Monico]]></surname>
<given-names><![CDATA[J. F. G.]]></given-names>
</name>
</person-group>
<source><![CDATA[Posicionamento pelo GNSS: Fundamentos, Definição e Aplicação]]></source>
<year>2008</year>
<edition>2 ed.</edition>
<publisher-loc><![CDATA[São Paulo ]]></publisher-loc>
<publisher-name><![CDATA[Editora UNESP]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B18">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Pan]]></surname>
<given-names><![CDATA[L.]]></given-names>
</name>
<name>
<surname><![CDATA[Cai]]></surname>
<given-names><![CDATA[C.]]></given-names>
</name>
<name>
<surname><![CDATA[Santerre]]></surname>
<given-names><![CDATA[R.]]></given-names>
</name>
<name>
<surname><![CDATA[Zhu]]></surname>
<given-names><![CDATA[J.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Combined GPS/GLONASS precise point positioning with fixed ambiguities]]></article-title>
<source><![CDATA[Sensors]]></source>
<year>2014</year>
<volume>14</volume>
<numero>9</numero>
<issue>9</issue>
<page-range>17530-47</page-range></nlm-citation>
</ref>
<ref id="B19">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Pinto]]></surname>
<given-names><![CDATA[M. S.]]></given-names>
</name>
<name>
<surname><![CDATA[Camargo]]></surname>
<given-names><![CDATA[P. O.]]></given-names>
</name>
<name>
<surname><![CDATA[Monico]]></surname>
<given-names><![CDATA[J. F. G.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Influência da combinação de dados GPS e GLONASS no georreferenciamento de imóveis rurais]]></article-title>
<source><![CDATA[Boletim de Ciências Geodésicas]]></source>
<year>2013</year>
<volume>19</volume>
<numero>1</numero>
<issue>1</issue>
<page-range>135-51</page-range></nlm-citation>
</ref>
<ref id="B20">
<nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Polezel]]></surname>
<given-names><![CDATA[W. G. C.]]></given-names>
</name>
</person-group>
<source><![CDATA[Investigações sobre o impacto da modernização do GNSS no posicionamento]]></source>
<year>2010</year>
<publisher-name><![CDATA[Universide Estadual Pauliista]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B21">
<nlm-citation citation-type="">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Polischuk]]></surname>
<given-names><![CDATA[G. M.]]></given-names>
</name>
<name>
<surname><![CDATA[Kozlov]]></surname>
<given-names><![CDATA[V. I.]]></given-names>
</name>
<name>
<surname><![CDATA[Ilitchov]]></surname>
<given-names><![CDATA[V. V.]]></given-names>
</name>
<name>
<surname><![CDATA[Kozlov]]></surname>
<given-names><![CDATA[A. G.]]></given-names>
</name>
<name>
<surname><![CDATA[Bartenev]]></surname>
<given-names><![CDATA[V. A.]]></given-names>
</name>
<name>
<surname><![CDATA[Kossenko]]></surname>
<given-names><![CDATA[V. E.]]></given-names>
</name>
<name>
<surname><![CDATA[Vorokhovsky]]></surname>
<given-names><![CDATA[Y.L.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[The global navigation satellite system GLONASS: development and usage in the 21st century]]></article-title>
<source><![CDATA[Proceedings of the 34th Annual Precise Time and Time Interval (PTTI), Systems and Applications Meeting]]></source>
<year>2002</year>
<page-range>151-60</page-range></nlm-citation>
</ref>
<ref id="B22">
<nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Seeber]]></surname>
<given-names><![CDATA[G.]]></given-names>
</name>
</person-group>
<source><![CDATA[Satellite Geodesy: Foundations, Methods, and Applications]]></source>
<year>2003</year>
<publisher-loc><![CDATA[Berlin, New York ]]></publisher-loc>
<publisher-name><![CDATA[Walter de Gruyter]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B23">
<nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Teunissen]]></surname>
<given-names><![CDATA[P.]]></given-names>
</name>
<name>
<surname><![CDATA[Montenbruck]]></surname>
<given-names><![CDATA[O.]]></given-names>
</name>
</person-group>
<source><![CDATA[Springer Handbook of Global Navigation Satellite Systems]]></source>
<year>2017</year>
<publisher-name><![CDATA[Springer]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B24">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Ventorim]]></surname>
<given-names><![CDATA[B. G.]]></given-names>
</name>
<name>
<surname><![CDATA[Dal Poz]]></surname>
<given-names><![CDATA[W. R.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Avaliação do desempenho dos sistemas GPS e GLONASS no posicionamento por ponto preciso, combinados e individualmente]]></article-title>
<source><![CDATA[Boletim de Ciências Geodésicas]]></source>
<year>2016</year>
<volume>22</volume>
<numero>2</numero>
<issue>2</issue>
<page-range>265-81</page-range></nlm-citation>
</ref>
</ref-list>
</back>
</article>
