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Evaluation of the gravimetric network expansion and the topography influence on the solution of the short wavelengths in the Brazilian geoidal model 2015 for the south region of Minas Gerais

Geodetic community have been researching an adequate methodology, with the low amount of gravimetric data, trying to acquire a single consistent altitudes network. In this context, the usage of the Geoidal Models (GM) to determine the altitudes with a physical meaning improved together with the spat...

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Principais autores: Siqueira, Loram, Palmeiro, Alessandra Svonka
Formato: Artigo
Idioma: Português
Publicado em: Universidade Tecnológica Federal do Paraná (UTFPR) 2018
Acesso em linha: http://periodicos.utfpr.edu.br/rbgeo/article/view/7480
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spelling peri-article-74802018-12-14T12:24:19Z Evaluation of the gravimetric network expansion and the topography influence on the solution of the short wavelengths in the Brazilian geoidal model 2015 for the south region of Minas Gerais Avaliação da expansão da rede de dados gravimétricos e influência do relevo na solução dos curtos e curtíssimos comprimentos de onda do sinal de N no modelo geoidal brasileiro 2015 para a o sul de Minas Gerais Siqueira, Loram Palmeiro, Alessandra Svonka 1.07.04.01-9 MAPGEO2015; altitudes; Decomposição espectral MAPGEO2015; Heights; Spectral decompositions Geodetic community have been researching an adequate methodology, with the low amount of gravimetric data, trying to acquire a single consistent altitudes network. In this context, the usage of the Geoidal Models (GM) to determine the altitudes with a physical meaning improved together with the spatial era.  MAPGEO2015 is the most recent Brazilian Geoidal Model (GM), produced and provided by the Instituto Brasileiro de Geografia e Estatística (IBGE) and by the Escola Politécnica da Universidade de São Paulo – Poli/USP. This research, using the spectral decomposition, analyzed the variations between the new product and its old version and used from SAT/GPS terrestrial stations to compare. Using the decomposition of the short wavelengths also evaluated the real variation between the models and if those were significant and lastly if the topography gradient was related to the variability in the models. With all the steps concluded, it was verified that the discrepancy between the Geoidal Models did not presented any significant difference as was expected, this fact can be caused by the empty gravimetric data areas in the Brazilian northern region, degrading in certain ways the data that could present better results if regional models were created. A comunidade geodésica tem desenvolvido pesquisas e buscado uma metodologia adequada, com uma quantidade restrita de dados gravimétricos, visando à obtenção de um sistema de altitudes consistente e único.  Neste contexto a utilização de Modelos Geoidais (MGs) para a determinação de altitudes com significado físico obteve grande avanço junto a era espacial. O MAPGEO2015 é o mais recente Modelo Geoidal (MG) brasileiro, produzido e fornecido pela Fundação Instituto Brasileiro de Geografia e Estatística (IBGE) e pela Escola Politécnica da Universidade de São Paulo (EP/USP). Este trabalho, a partir da metodologia de decomposição espectral, analisou a variação entre este novo produto e o modelo antecessor e utilizou-se de estações terrestres do tipo SAT/GPS para comparação. Com a utilização das decomposições dos curtos e curtíssimos comprimentos de onda avaliou-se a real variação entre os modelos e se tais variações se apresentavam significativas através do teste estatístico t de Student para amostras pareadas sobre a região de interesse e por último se a variação da topografia influencia na variabilidade entre os modelos. Pôde-se verificar que a discrepância entre os MGs não apresentou uma diferença significativa como se esperava.  Universidade Tecnológica Federal do Paraná (UTFPR) Universidade Federal Rural do Rio de Janeiro, Departamento de Engenharia 2018-12-12 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion application/pdf http://periodicos.utfpr.edu.br/rbgeo/article/view/7480 10.3895/rbgeo.v6n4.7480 Revista Brasileira de Geomática; v. 6, n. 4 (2018); 294-311 Revista Brasileira de Geomática; v. 6, n. 4 (2018); 294-311 2317-4285 10.3895/rbgeo.v6n4 por http://periodicos.utfpr.edu.br/rbgeo/article/view/7480/5829 Direitos autorais 2018 CC-BY http://creativecommons.org/licenses/by/4.0
institution Universidade Tecnológica Federal do Paraná
collection PERI
language Português
format Artigo
author Siqueira, Loram
Palmeiro, Alessandra Svonka
spellingShingle Siqueira, Loram
Palmeiro, Alessandra Svonka
Evaluation of the gravimetric network expansion and the topography influence on the solution of the short wavelengths in the Brazilian geoidal model 2015 for the south region of Minas Gerais
author_sort Siqueira, Loram
title Evaluation of the gravimetric network expansion and the topography influence on the solution of the short wavelengths in the Brazilian geoidal model 2015 for the south region of Minas Gerais
title_short Evaluation of the gravimetric network expansion and the topography influence on the solution of the short wavelengths in the Brazilian geoidal model 2015 for the south region of Minas Gerais
title_full Evaluation of the gravimetric network expansion and the topography influence on the solution of the short wavelengths in the Brazilian geoidal model 2015 for the south region of Minas Gerais
title_fullStr Evaluation of the gravimetric network expansion and the topography influence on the solution of the short wavelengths in the Brazilian geoidal model 2015 for the south region of Minas Gerais
title_full_unstemmed Evaluation of the gravimetric network expansion and the topography influence on the solution of the short wavelengths in the Brazilian geoidal model 2015 for the south region of Minas Gerais
title_sort evaluation of the gravimetric network expansion and the topography influence on the solution of the short wavelengths in the brazilian geoidal model 2015 for the south region of minas gerais
description Geodetic community have been researching an adequate methodology, with the low amount of gravimetric data, trying to acquire a single consistent altitudes network. In this context, the usage of the Geoidal Models (GM) to determine the altitudes with a physical meaning improved together with the spatial era.  MAPGEO2015 is the most recent Brazilian Geoidal Model (GM), produced and provided by the Instituto Brasileiro de Geografia e Estatística (IBGE) and by the Escola Politécnica da Universidade de São Paulo – Poli/USP. This research, using the spectral decomposition, analyzed the variations between the new product and its old version and used from SAT/GPS terrestrial stations to compare. Using the decomposition of the short wavelengths also evaluated the real variation between the models and if those were significant and lastly if the topography gradient was related to the variability in the models. With all the steps concluded, it was verified that the discrepancy between the Geoidal Models did not presented any significant difference as was expected, this fact can be caused by the empty gravimetric data areas in the Brazilian northern region, degrading in certain ways the data that could present better results if regional models were created.
publisher Universidade Tecnológica Federal do Paraná (UTFPR)
publishDate 2018
url http://periodicos.utfpr.edu.br/rbgeo/article/view/7480
_version_ 1805295407879684096
score 10,814766

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