Generating VRS data using atmospheric models: How far can we go?

Nowadays, with the expansion of the reference stations networks, several positioning techniques have been developed and/or improved. Among them, the VRS (Virtual Reference Station) concept has been very used. In this paper the goal is to generate VRS data in a modified technique. In the proposed methodology the DD (double difference) ambiguities are not computed. The network correction terms are obtained using only atmospheric (ionospheric and tropospheric) models. In order to carry out the experiments it was used data of five reference stations from the GPS Active Network of West of São Paulo State and an extra station. To evaluate the VRS data quality it was used three different strategies: PPP (Precise Point Positioning) and Relative Positioning in static and kinematic modes, and DGPS (Differential GPS). Furthermore, the VRS data were generated in the position of a real reference station. The results provided by the VRS data agree quite well with those of the real file data.

Evolução metamórfica e termobarometria das rochas metamáficas/metabásicas da região de Pontalina - GO

At the Pontalina region, the Magmatic Arc of Goiás is constituted by orthogneisses, metasediments, metaultramafics and metamafic/metabasics, geochemically related to island arcs. Mineral assemblages related to metamorphic peak observed in the study area are typically of the amphibolite facies and were generated before or during the initial stage of the development of the main foliation (S n). Thermobarometric data show the P and T conditions for the amphibole + plagioclase and plagioclase + garnet + amphibole assemblages in the metamafic/metabasic rocks correspond to amphibolite facies (medium to upper grade), and plot in the kyanite stability field. The results indicate that the metamorphic peak (M1) in the amphibolite facies (medium up to upper grade) reached temperatures slightly higher than 700°C, not exceeding 775°C, under conditions of medium pressure (∼10 kbar). Thermobarometric and petrographic data, related to the metamorphism, indicate a clockwise P-T path for the surrounding rocks.

Can growth and equity go hand in hand?

Includes bibliography

Geochemical and radioactivity characterization of rocks from the Rio Preto (Go) Project

The Rio Preto Project, developed by the extinct Brazilian nuclear state company, Nuclebrás, during the late 70s and early 80s, consisted of basic geological mapping and radiometric characterization by aerogeophysical gamma-ray spectrometry, without channel discrimination, of a surface area of 650 km2 located to the west of the Chapada dos Veadeiros National Park on the northeastern of Goiás State, Brazil, including the confluence area of Claro and Preto Rivers. Additionally, the natural radioelements U, Th and 40K were determined by gamma-ray spectrometry in 300 rock samples from cores of the Rio Preto Project area. The tests were conducted at LABIDRO-Isotopes and Hydrochemistry Laboratory of the Departament of Petrology and Metallogeny (DPM) of the Institute of Geosciences and Exact Sciences, UNESP, in Rio Claro, SP, Brazil. This paper reports the results of petrographic characterization and chemical analyses of major oxides (SiO2, TiO2, Al2O3, Fe2O3, MgO, MnO, K2O, Na2O, CaO and P2O5) for all samples used to determine the natural radioelements present in the region. The organic matter content results obtained by colorimetry are also reported for selected cores of different lithotypes in order to investigate the possible relationship between graphite and the radioelements uranium and thorium. Finally, uranium content and 234U/238U activity ratio data for selected samples of schists and gneisses of the Lower Member of the Ticunzal Formation suggest the influence of weathering processes in the area. © 2012 Sociedade Brasileira de Geofísica.

Macroalgas lóticas do Parque Nacional Chapada dos Veadeiros e arredores (GO): levantamento florístico e distribuição ecológica das comunidades

Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)

Modernização da agricultura e (re)organização do espaço no município de Jataí-GO

Pós-graduação em Geografia - FCT

Sobre o camponês do sertão: produção do espaço e identidade camponesa em assentamentos do município de Goiás-GO

Pós-graduação em Geografia - FCT

Alterações ambientais decorrentes da presença de depósitos tecnogênicos na bacia hidrográfica do Ribeirão Anicuns em Goiânia, GO

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

Caracterização estrutural da porção sul do greenstone belt de Guarinos, GO

Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)

Cadeia produtiva do óleo de gueroba (Syagrus oleracea becc.): geração de renda para agricultores familiares e promoção da agrobiodiversidade, Buriti de Goiás (GO)

Pós-graduação em Agronomia (Horticultura) - FCA

Açúcar da areia: produção de cana-de-açúcar (Saccharum officcinarum) em Neossolos Quartzarênicos de Serranópolis (GO), alguns efeitos no solo e no comportamento da água

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

Expansão do capital, territorialidade do trabalho e as respostas do SENAI em Catalão (GO) no século XXI: uma contribuição à geografia do trabalho

Pós-graduação em Geografia - FCT

Dinâmica populacional de Alabama argillacea (Hueb.), parasitismo de ovos por Trichogramma pretiosum Riley e ocorrência de predadores na cultura do algodoeiro, em Ipameri, GO

Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)

O aproveitamento da ordem de aquisição das sílabas nas cartilhas adotadas no município de Catalão-GO

Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)

Avaliação de processos erosivos a partir da análise integrada do meio físico na bacia hidrográfica do Ribeirão das Pedras, Quirinópolis (GO)

Pós-graduação em Geociências e Meio Ambiente - IGCE