Using a regional numerical weather prediction model for GNSS positioning over Brazil

Detalhes bibliográficos
Autor(a) principal: Alves, Daniele Barroca Marra [UNESP]
Data de Publicação: 2016
Outros Autores: Sapucci, Luiz Fernando, Marques, Haroldo Antonio, de Souza, Eniuce Menezes, Gouveia, Tayná Aparecida Ferreira [UNESP], Magário, Jackes Akira [UNESP]
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Repositório Institucional da UNESP
Texto Completo: http://dx.doi.org/10.1007/s10291-015-0477-x
http://hdl.handle.net/11449/167946
Resumo: The global navigation satellite system (GNSS) can provide centimeter positioning accuracy at low costs. However, in order to obtain the desired high accuracy, it is necessary to use high-quality atmospheric models. We focus on the troposphere, which is an important topic of research in Brazil where the tropospheric characteristics are unique, both spatially and temporally. There are dry regions, which lie mainly in the central part of the country. However, the most interesting area for the investigation of tropospheric models is the wet region which is located in the Amazon forest. This region substantially affects the variability of humidity over other regions of Brazil. It provides a large quantity of water vapor through the humidity convergence zone, especially for the southeast region. The interconnection and large fluxes of water vapor can generate serious deficiencies in tropospheric modeling. The CPTEC/INPE (Center for Weather Forecasting and Climate Studies/Brazilian Institute for Space Research) has been providing since July 2012 a numerical weather prediction (NWP) model for South America, known as Eta. It has yield excellent results in weather prediction but has not been used in GNSS positioning. This NWP model was evaluated in precise point positioning (PPP) and network-based positioning. Concerning PPP, the best positioning results were obtained for the station SAGA, located in Amazon region. Using the NWP model, the 3D RMS are less than 10 cm for all 24 h of data, whereas the values reach approximately 60 cm for the Hopfield model. For network-based positioning, the best results were obtained mainly when the tropospheric characteristics are critical, in which case an improvement of up to 7.2 % was obtained in 3D RMS using NWP models.
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spelling Using a regional numerical weather prediction model for GNSS positioning over BrazilGNSSNumerical weather predictionPositioningZenithal tropospheric delayThe global navigation satellite system (GNSS) can provide centimeter positioning accuracy at low costs. However, in order to obtain the desired high accuracy, it is necessary to use high-quality atmospheric models. We focus on the troposphere, which is an important topic of research in Brazil where the tropospheric characteristics are unique, both spatially and temporally. There are dry regions, which lie mainly in the central part of the country. However, the most interesting area for the investigation of tropospheric models is the wet region which is located in the Amazon forest. This region substantially affects the variability of humidity over other regions of Brazil. It provides a large quantity of water vapor through the humidity convergence zone, especially for the southeast region. The interconnection and large fluxes of water vapor can generate serious deficiencies in tropospheric modeling. The CPTEC/INPE (Center for Weather Forecasting and Climate Studies/Brazilian Institute for Space Research) has been providing since July 2012 a numerical weather prediction (NWP) model for South America, known as Eta. It has yield excellent results in weather prediction but has not been used in GNSS positioning. This NWP model was evaluated in precise point positioning (PPP) and network-based positioning. Concerning PPP, the best positioning results were obtained for the station SAGA, located in Amazon region. Using the NWP model, the 3D RMS are less than 10 cm for all 24 h of data, whereas the values reach approximately 60 cm for the Hopfield model. For network-based positioning, the best results were obtained mainly when the tropospheric characteristics are critical, in which case an improvement of up to 7.2 % was obtained in 3D RMS using NWP models.São Paulo State University - UNESP - Brazil, Roberto Simonsen, 305INPE - Instituto Nacional de Pesquisas Espaciais, Rodovia Presidente Dutra, km 40UFPE - Universidade Federal de Pernambuco - Brazil, Rua Academico Hélio Ramos, S/N, Cidade UniversitáriaMaringa State University - UEM - Brazil, Colombo Av., 5790São Paulo State University - UNESP - Brazil, Roberto Simonsen, 305Universidade Estadual Paulista (Unesp)INPE - Instituto Nacional de Pesquisas EspaciaisUniversidade Federal de Pernambuco (UFPE)Universidade Estadual de Maringá (UEM)Alves, Daniele Barroca Marra [UNESP]Sapucci, Luiz FernandoMarques, Haroldo Antoniode Souza, Eniuce MenezesGouveia, Tayná Aparecida Ferreira [UNESP]Magário, Jackes Akira [UNESP]2018-12-11T16:38:59Z2018-12-11T16:38:59Z2016-10-01info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/article677-685application/pdfhttp://dx.doi.org/10.1007/s10291-015-0477-xGPS Solutions, v. 20, n. 4, p. 677-685, 2016.1521-18861080-5370http://hdl.handle.net/11449/16794610.1007/s10291-015-0477-x2-s2.0-849387179942-s2.0-84938717994.pdfScopusreponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPengGPS Solutions1,674info:eu-repo/semantics/openAccess2023-12-03T06:14:37Zoai:repositorio.unesp.br:11449/167946Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestopendoar:29462024-08-05T19:23:42.171040Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false
dc.title.none.fl_str_mv Using a regional numerical weather prediction model for GNSS positioning over Brazil
title Using a regional numerical weather prediction model for GNSS positioning over Brazil
spellingShingle Using a regional numerical weather prediction model for GNSS positioning over Brazil
Alves, Daniele Barroca Marra [UNESP]
GNSS
Numerical weather prediction
Positioning
Zenithal tropospheric delay
title_short Using a regional numerical weather prediction model for GNSS positioning over Brazil
title_full Using a regional numerical weather prediction model for GNSS positioning over Brazil
title_fullStr Using a regional numerical weather prediction model for GNSS positioning over Brazil
title_full_unstemmed Using a regional numerical weather prediction model for GNSS positioning over Brazil
title_sort Using a regional numerical weather prediction model for GNSS positioning over Brazil
author Alves, Daniele Barroca Marra [UNESP]
author_facet Alves, Daniele Barroca Marra [UNESP]
Sapucci, Luiz Fernando
Marques, Haroldo Antonio
de Souza, Eniuce Menezes
Gouveia, Tayná Aparecida Ferreira [UNESP]
Magário, Jackes Akira [UNESP]
author_role author
author2 Sapucci, Luiz Fernando
Marques, Haroldo Antonio
de Souza, Eniuce Menezes
Gouveia, Tayná Aparecida Ferreira [UNESP]
Magário, Jackes Akira [UNESP]
author2_role author
author
author
author
author
dc.contributor.none.fl_str_mv Universidade Estadual Paulista (Unesp)
INPE - Instituto Nacional de Pesquisas Espaciais
Universidade Federal de Pernambuco (UFPE)
Universidade Estadual de Maringá (UEM)
dc.contributor.author.fl_str_mv Alves, Daniele Barroca Marra [UNESP]
Sapucci, Luiz Fernando
Marques, Haroldo Antonio
de Souza, Eniuce Menezes
Gouveia, Tayná Aparecida Ferreira [UNESP]
Magário, Jackes Akira [UNESP]
dc.subject.por.fl_str_mv GNSS
Numerical weather prediction
Positioning
Zenithal tropospheric delay
topic GNSS
Numerical weather prediction
Positioning
Zenithal tropospheric delay
description The global navigation satellite system (GNSS) can provide centimeter positioning accuracy at low costs. However, in order to obtain the desired high accuracy, it is necessary to use high-quality atmospheric models. We focus on the troposphere, which is an important topic of research in Brazil where the tropospheric characteristics are unique, both spatially and temporally. There are dry regions, which lie mainly in the central part of the country. However, the most interesting area for the investigation of tropospheric models is the wet region which is located in the Amazon forest. This region substantially affects the variability of humidity over other regions of Brazil. It provides a large quantity of water vapor through the humidity convergence zone, especially for the southeast region. The interconnection and large fluxes of water vapor can generate serious deficiencies in tropospheric modeling. The CPTEC/INPE (Center for Weather Forecasting and Climate Studies/Brazilian Institute for Space Research) has been providing since July 2012 a numerical weather prediction (NWP) model for South America, known as Eta. It has yield excellent results in weather prediction but has not been used in GNSS positioning. This NWP model was evaluated in precise point positioning (PPP) and network-based positioning. Concerning PPP, the best positioning results were obtained for the station SAGA, located in Amazon region. Using the NWP model, the 3D RMS are less than 10 cm for all 24 h of data, whereas the values reach approximately 60 cm for the Hopfield model. For network-based positioning, the best results were obtained mainly when the tropospheric characteristics are critical, in which case an improvement of up to 7.2 % was obtained in 3D RMS using NWP models.
publishDate 2016
dc.date.none.fl_str_mv 2016-10-01
2018-12-11T16:38:59Z
2018-12-11T16:38:59Z
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
dc.type.driver.fl_str_mv info:eu-repo/semantics/article
format article
status_str publishedVersion
dc.identifier.uri.fl_str_mv http://dx.doi.org/10.1007/s10291-015-0477-x
GPS Solutions, v. 20, n. 4, p. 677-685, 2016.
1521-1886
1080-5370
http://hdl.handle.net/11449/167946
10.1007/s10291-015-0477-x
2-s2.0-84938717994
2-s2.0-84938717994.pdf
url http://dx.doi.org/10.1007/s10291-015-0477-x
http://hdl.handle.net/11449/167946
identifier_str_mv GPS Solutions, v. 20, n. 4, p. 677-685, 2016.
1521-1886
1080-5370
10.1007/s10291-015-0477-x
2-s2.0-84938717994
2-s2.0-84938717994.pdf
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv GPS Solutions
1,674
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv 677-685
application/pdf
dc.source.none.fl_str_mv Scopus
reponame:Repositório Institucional da UNESP
instname:Universidade Estadual Paulista (UNESP)
instacron:UNESP
instname_str Universidade Estadual Paulista (UNESP)
instacron_str UNESP
institution UNESP
reponame_str Repositório Institucional da UNESP
collection Repositório Institucional da UNESP
repository.name.fl_str_mv Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)
repository.mail.fl_str_mv
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