scholarly journals The computation of the geoid model in the state of São Paulo using two methodologies and GOCE models

2014 ◽  
Vol 20 (1) ◽  
pp. 183-203 ◽  
Author(s):  
Gabriel do Nascimento Guimarães ◽  
Denizar Blitzkow ◽  
Riccardo Barzaghi ◽  
Ana Cristina Oliveira Cancoro de Matos
Keyword(s):  
Least Squares ◽  
Geoid Height ◽  
Sao Paulo ◽  
The State ◽  
São Paulo ◽  
Least Squares Collocation ◽  
Geoid Model ◽  
Gps Leveling ◽  
Relative Comparisons ◽  
Stokes Integral

The purpose of this manuscript is to compute and to evaluate the geoid model in the State of São Paulo from two methodologies (Stokes' integral through the Fast Fourier Transform - FFT and Least Squares Collocation - LSC). Another objective of this study is to verify the potentiality of GOCE-based. A special attention is given to GOCE mission. The theory related to Stokes' integral and Least Squares Collocation is also discussed in this work. The spectral decomposition was employed in the geoid models computation and the long wavelength component was represented by EGM2008 up to degree and order 150 and 360 and GOCE-based models up to 150. The models were compared in terms of geoid height residual and absolute and relative comparisons from GPS/leveling and the results show consistency between them. In addition, a comparison in the mountain regions was carried out to verify the methodologies behavior in this area; the results showed that LSC is less consistent than FFT.

scholarly journals GRAVIMETRIC DENSIFICATION IN THE STATE OF SÃO PAULO AIMING A GEOID MODEL

2013 ◽  
Vol 31 (4) ◽  
pp. 631 ◽  
Author(s):  
Gabriel Do Nascimento Guimarães ◽  
Ana Cristina Oliveira Cancoro De Matos ◽  
Denizar Blitzkow
Keyword(s):  
Gravity Anomalies ◽  
Sao Paulo ◽  
The State ◽  
Geoidal Height ◽  
Geopotential Model ◽  
São Paulo ◽  
Geoid Model ◽  
Para Determinar ◽  
Field Works ◽  
Gps Leveling

ABSTRACT. Gravitydata coverage is quite complete in São Paulo state for a 5’ resolution. In addition, field works have been conducted to fill in gaps around the state. These efforts are the results of the Fundac¸˜ao de Amparo `a Pesquisa do Estado de S˜ao Paulo (FAPESP) Thematic Project that seeks to achieve the establishment of a geoid model, a height system, and the study of mean sea level. This paper presents a comparison between two geoidal height models; the first with information available up to 2008 (beginning of the project) and the second including all data collected. Both models have been derived using the modified Stokes integral through the FFT technique. The SHGEO package was used to derive the Helmert gravity anomalies, while the EGM2008 model was selected as a reference geopotential field restricted to degree and order 150, to obtain the long and medium wavelength components. The model was validated using the geoidal heights from 170 GPS observations on Bench Marks of the spirit leveling network. The corresponding height anomalies derived from recent geopotential models (GO CONS GCF 2 TIM R2, GOCO02S and EIGEN-6C) were also compared with the same quantities at the points of leveling, besides the official Brazilian model, MAPGEO2010. The findings showed that GEOIDSP2011 displayed better consistency with respect for the GPS/leveling than GEOIDSP2008 and the geopotential models.Keywords: geodesy, geoid, geopotential model. RESUMO. O estado de São Paulo possui uma cobertura bastante completa de dados gravimétricos para uma resolução de 5’. Além disso, trabalhos de campo estão sendo realizados com o objetivo de preencher os vazios no entorno do estado. Os recentes esforços nos levantamentos são devido ao Projeto Temático da FAPESP que tem, entre outras finalidades o estabelecimento de um modelo geoidal, além do estudo sobre sistemas de altitude e monitoramento do nível médio dos mares. Este artigo apresenta a comparação entre doismodelos de alturas geoidais; o primeiro cominformações disponíveis até 2008 (fase inicial do projeto) e o segundo incluindo os dados coletados até o momento. Ambos os modelos foram calculados utilizando a integral modificada de Stokes por meio da técnica FFT. O pacote computacional SHGEO foi empregado para determinar as anomalias de gravidade de Helmert, enquanto omodelo do geopotencial EGM2008 restrito até grau e ordem 150 foi selecionado para obter as componentes de longo e médio comprimento de onda. Osmodelos foramvalidados a partir da comparação das alturas geoidais em 170 marcos da rede de nivelamento onde observações GPS foram conduzidas. As anomalias de altura dos modelos mais recentes do geopotencial (GO CONS GCF 2 TIM R2, GOCO02S e EIGEN-6C) também foram comparadas com as mesmas grandezas nos pontos de nivelamento, além do modelo oficial brasileiro, o MAPGEO2010. Os resultados mostraram melhor consistência na comparação com os pontos GPS/nivelamento do modelo GEOIDSP2011 em relação ao GEOIDSP2008 e os modelos do geopotencial.Palavras-chave: geodésia, geoide, modelo do geopotencial.

scholarly journals A High-Resolution Gravimetric Geoid Model for Kuwait Using the Least-Squares Collocation

2022 ◽  
Vol 9 ◽  
Author(s):  
Hamad Al-Ajami ◽  
Ahmed Zaki ◽  
Mostafa Rabah ◽  
Mohamed El-Ashquer
Keyword(s):  
High Resolution ◽  
Least Squares ◽  
Geopotential Model ◽  
Gravimetric Geoid ◽  
Least Squares Collocation ◽  
Geoid Model ◽  
Terrestrial Gravity ◽  
Digital Elevation ◽  
Elevation Model ◽  
Gps Leveling

A new gravimetric geoid model, the KW-FLGM2021, is developed for Kuwait in this study. This new geoid model is driven by a combination of the XGM2019e-combined global geopotential model (GGM), terrestrial gravity, and the SRTM 3 global digital elevation model with a spatial resolution of three arc seconds. The KW-FLGM2021 has been computed by using the technique of Least Squares Collocation (LSC) with Remove-Compute-Restore (RCR) procedure. To evaluate the external accuracy of the KW-FLGM2021 gravimetric geoid model, GPS/leveling data were used. As a result of this evaluation, the residual of geoid heights obtained from the KW-FLGM2021 geoid model is 2.2 cm. The KW-FLGM2021 is possible to be recommended as the first accurate geoid model for Kuwait.

scholarly journals THE GEOID AND QUASIGEOID OF SÃO PAULO STATE USING THE UPDATED GRAVIMETRIC DATA AND THE 2018 BVRF

2021 ◽  
Vol 27 (2) ◽  
Author(s):  
Valéria Cristina Silva ◽  
Flavio Guilherme Vaz de Almeida Filho ◽  
Denizar Blitzkow ◽  
Ana Cristina Oliveira Cancoro de Matos
Keyword(s):  
Gravity Anomalies ◽  
Geoid Height ◽  
Sao Paulo ◽  
Height Anomaly ◽  
São Paulo ◽  
Geoid Model ◽  
Normal Height ◽  
Paulo State ◽  
Gravimetric Data ◽  
São Paulo State

Abstract The combination of physical and geometric heights, required for geodetic purposes, uses Global Geopotential Models (GGMs), local geoid, or quasigeoid models. The geoid height and the height anomaly, provided by GGMs, are not accurate enough for most engineering applications. Considering the normal height system of Brazil and the physical concepts of the involved reference surfaces, a quasigeoid model is more appropriate than the current Brazilian geoid model MAPGEO2015. This paper shows the determination of the geoid and the quasigeoid models for São Paulo state using the updated gravimetric data and the new system of the normal height of the 2018 Brazilian Vertical Reference Frame (BVRF). The computation of the quasigeoid model was performed by numerical integration through the Fast Fourier Transform (FFT). The Molodensky gravity anomaly was determined in a 5’ grid and reduced and restored using the Residual Terrain Model (RTM) technique and the XGM2019e GGM truncated at degree and order 250 and 720. The geoid model was derived from the Bouguer gravity anomalies. The quasigeoid model validation has shown a Root Mean Square (RMS) difference of 18 cm compared with the Global Positioning System (GPS) measurements in the levelling network.

New Geoid Model in the State of São Paulo

2015 ◽  
pp. 139-145 ◽  
Author(s):  
G. N. Guimarães ◽  
A. C. O.C. de Matos ◽  
D. Blitzkow
Keyword(s):  
Sao Paulo ◽  
The State ◽  
São Paulo ◽  
Geoid Model

The Daily Routine of Students in the Classroom

2020 ◽  
Vol 8 (3) ◽  
pp. 157-163
Author(s):  
Lilian Marques Silva
Keyword(s):  
Elementary School ◽  
Public School ◽  
Data Collection ◽  
New Technologies ◽  
Sao Paulo ◽  
The State ◽  
Daily Routine ◽  
São Paulo ◽  
Access To Information ◽  
Technological Advances

The almost instantaneous access to information provided by technological advances has revolutionized the behavior of people and of the classrooms too. Teachers had to adapt themselves to new technologies to maintain students interested and attentive to the discipline being taught. In this work, the behavior of the students of the 6th grade of elementary school II during class was observed. The school chosen is a public school in the State of São Paulo (Brazil). The research was based on data collection. The students were observed by being filmed during six months. The results showed that the students were interested in the classes and committed to the activities. The place that the student chooses to sit in the classroom influences the behavior of the teacher, because the more distant the teacher, the less he participates in the class.

Sound-Politics in São Paulo

2019 ◽  
Author(s):  
Leonardo Cardoso
Keyword(s):  
Crime Control ◽  
State Intervention ◽  
Sao Paulo ◽  
The State ◽  
Ethnographic Study ◽  
São Paulo ◽  
Cultural Rights ◽  
Point Of Entry ◽  
Wide Range ◽  
Analytical Category

This book is an ethnographic study of controversial sounds and noise control debates in Latin America’s most populous city. It discusses the politics of collective living by following several threads linking sound-making practices to governance issues. Rather than discussing sound within a self-enclosed “cultural” field, I examine it as a point of entry for analyzing the state. At the same time, rather than portraying the state as a self-enclosed “apparatus” with seemingly inexhaustible homogeneous power, I describe it as a collection of unstable (and often contradictory) sectors, personnel, strategies, discourses, documents, and agencies. My goal is to approach sound as an analytical category that allows us to access citizenship issues. As I show, environmental noise in São Paulo has been entangled in a wide range of debates, including public health, religious intolerance, crime control, urban planning, cultural rights, and economic growth. The book’s guiding question can be summarized as follows: how do sounds enter and leave the sphere of state control? I answer this question by examining a multifaceted process I define as “sound-politics.” The term refers to sounds as objects that are susceptible to state intervention through specific regulatory, disciplinary, and punishment mechanisms. Both “sound” and “politics” in “sound-politics” are nouns, with the hyphen serving as a bridge that expresses the instability that each concept inserts into the other.

scholarly journals Crustacea, Isopoda, Oniscidea Latreille, 1802: new continent record and distribution extension in Brazil

Check List ◽  
2010 ◽  
Vol 6 (2) ◽  
pp. 217 ◽  
Author(s):  
Mariana Juventina Magrini ◽  
Paula Beatriz Araujo ◽  
Marcio Uehara-Prado
Keyword(s):  
Rio Grande ◽  
Sao Paulo ◽  
The State ◽  
Southeastern Brazil ◽  
Pitfall Traps ◽  
São Paulo ◽  
Undescribed Species ◽  
Rio Grande Do Sul ◽  
Serra Do Mar ◽  
First Time

Terrestrial Isopods were sampled in four protected Atlantic Forest areas located in Serra do Mar, state of São Paulo, southeastern Brazil. A total of 2,217 individuals of six species (Atlantoscia sp., Benthana werneri, Pseudodiploexochus tabularis, Pudeoniscus obscurus, Styloniscus spinosus and Trichorhina sp.) were captured in pitfall traps. The exotic species S. spinosus is recorded for the first time for the Americas. Another introduced species, P. tabularis, previously recorded only from the state of Rio Grande do Sul, had its geographic distribution extended to the state of São Paulo. The most abundant isopods in this study belong to an undescribed species of Atlantoscia.

scholarly journals Towards Providing Effective Data-Driven Responses to Predict the Covid-19 in São Paulo and Brazil

Sensors ◽  
2021 ◽  
Vol 21 (2) ◽  
pp. 540
Author(s):  
Fabio Amaral ◽  
Wallace Casaca ◽  
Cassio M. Oishi ◽  
José A. Cuminato
Keyword(s):  
Learning Strategies ◽  
Time Series Data ◽  
Sao Paulo ◽  
The State ◽  
Data Driven ◽  
Series Data ◽  
São Paulo ◽  
Time Data ◽  
Unified Framework ◽  
Infected People

São Paulo is the most populous state in Brazil, home to around 22% of the country’s population. The total number of Covid-19-infected people in São Paulo has reached more than 1 million, while its total death toll stands at 25% of all the country’s fatalities. Joining the Brazilian academia efforts in the fight against Covid-19, in this paper we describe a unified framework for monitoring and forecasting the Covid-19 progress in the state of São Paulo. More specifically, a freely available, online platform to collect and exploit Covid-19 time-series data is presented, supporting decision-makers while still allowing the general public to interact with data from different regions of the state. Moreover, a novel forecasting data-driven method has also been proposed, by combining the so-called Susceptible-Infectious-Recovered-Deceased model with machine learning strategies to better fit the mathematical model’s coefficients for predicting Infections, Recoveries, Deaths, and Viral Reproduction Numbers. We show that the obtained predictor is capable of dealing with badly conditioned data samples while still delivering accurate 10-day predictions. Our integrated computational system can be used for guiding government actions mainly in two basic aspects: real-time data assessment and dynamic predictions of Covid-19 curves for different regions of the state. We extend our analysis and investigation to inspect the virus spreading in Brazil in its regions. Finally, experiments involving the Covid-19 advance in other countries are also given.

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