Pub Date : 2022-05-18DOI: 10.11137/1982-3908_2022_45_46460
Maria de Fátima Alves de Matos, A. Scudelari, V. E. Amaro
{"title":"Variabilidade Interanual do Potencial Energético das Ondas Oceânicas na Costa Setentrional do Rio Grande do Norte, Atlântico Equatorial Sul","authors":"Maria de Fátima Alves de Matos, A. Scudelari, V. E. Amaro","doi":"10.11137/1982-3908_2022_45_46460","DOIUrl":"https://doi.org/10.11137/1982-3908_2022_45_46460","url":null,"abstract":"","PeriodicalId":39973,"journal":{"name":"Anuario do Instituto de Geociencias","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2022-05-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43356301","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-05-18DOI: 10.11137/1982-3908_2022_45_36503
E. Tanajura, A. Pacheco, J. M. L. Dominguez, Junia Kacenelenbogen Guimarães
{"title":"Avaliação de Subsidência Planície Deltaica do Rio São Francisco a partir dos Vértices de Referência de Nível da Rede Altimétrica Brasileira","authors":"E. Tanajura, A. Pacheco, J. M. L. Dominguez, Junia Kacenelenbogen Guimarães","doi":"10.11137/1982-3908_2022_45_36503","DOIUrl":"https://doi.org/10.11137/1982-3908_2022_45_36503","url":null,"abstract":"","PeriodicalId":39973,"journal":{"name":"Anuario do Instituto de Geociencias","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2022-05-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44277149","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-05-18DOI: 10.11137/1982-3908_2022_45_46008
K. M. Vestena, D. Santos
Urbanization brought a lot of pollution-related issues that are mitigable by the presence of urban vegetation. Therefore, it is necessary to map vegetation in urban areas, to assist the planning and implementation of public policies. As a technology presented in the last decades, the so-called Terrestrial Mobile Mapping Systems - TMMS, are capable of providing cost and time effective data acquisition, they are composed primarily by a Navigation System and an Imaging System, both mounted on a rigid platform, attachable to the top ofa ground vehicle. In this context, it is proposed the creation of a low-cost TMMS, which has the feature of imaging in the near-infrared (NIR) where the vegetation is highly discriminable. After the image acquisition step, it becomes necessary for the semantic segmentation of vegetation and non-vegetation. The current state of the art algorithms in semantic segmentation scope are the Convolutional Neural Networks - CNNs. In this study, CNNs were trained and tested, reaching a mean value of 83% for the Intersection Over Union (IoU) indicator. From the results obtained, which demonstrated good performance for the trained neural network, it is possible to concludethat the developed TMMS is suitable to capture data regarding urban vegetation.
{"title":"Development of a Low-Cost Terrestrial Mobile Mapping System for Urban Vegetation Detection Using Convolutional Neural Networks","authors":"K. M. Vestena, D. Santos","doi":"10.11137/1982-3908_2022_45_46008","DOIUrl":"https://doi.org/10.11137/1982-3908_2022_45_46008","url":null,"abstract":"Urbanization brought a lot of pollution-related issues that are mitigable by the presence of urban vegetation. Therefore, it is necessary to map vegetation in urban areas, to assist the planning and implementation of public policies. As a technology presented in the last decades, the so-called Terrestrial Mobile Mapping Systems - TMMS, are capable of providing cost and time effective data acquisition, they are composed primarily by a Navigation System and an Imaging System, both mounted on a rigid platform, attachable to the top ofa ground vehicle. In this context, it is proposed the creation of a low-cost TMMS, which has the feature of imaging in the near-infrared (NIR) where the vegetation is highly discriminable. After the image acquisition step, it becomes necessary for the semantic segmentation of vegetation and non-vegetation. The current state of the art algorithms in semantic segmentation scope are the Convolutional Neural Networks - CNNs. In this study, CNNs were trained and tested, reaching a mean value of 83% for the Intersection Over Union (IoU) indicator. From the results obtained, which demonstrated good performance for the trained neural network, it is possible to concludethat the developed TMMS is suitable to capture data regarding urban vegetation.","PeriodicalId":39973,"journal":{"name":"Anuario do Instituto de Geociencias","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2022-05-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47006878","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-01-07DOI: 10.11137/1982-3908_2022_45_39354
F. D. Silva, Antonio Leal Neto, Wollker Cunha Soares, José De Araújo Nogueira Neto, A. C. Artur, Irani Clezar Mattos, I. Clemente
{"title":"Caracterização Tecnológica e Taxa de Exalação de Radônio de um Olivina Diabásio Porfirítico da Região de Apuiarés – CE","authors":"F. D. Silva, Antonio Leal Neto, Wollker Cunha Soares, José De Araújo Nogueira Neto, A. C. Artur, Irani Clezar Mattos, I. Clemente","doi":"10.11137/1982-3908_2022_45_39354","DOIUrl":"https://doi.org/10.11137/1982-3908_2022_45_39354","url":null,"abstract":"","PeriodicalId":39973,"journal":{"name":"Anuario do Instituto de Geociencias","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2022-01-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46928164","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-12-22DOI: 10.11137/1982-3908_2021_44_43395
P. Fialho, A. Balbino, M. Antunes
Portugal has a rich fossil record both on the continent and in the Azores islands (Santa Maria). For decades, researchers have found thousands of fossils and identified hundreds of species from major taxonomic groups. The present work focuses on analyzing the scientific literature on fossils of Chondrichthyes collected in fossiliferous deposits of the Neogene. Fossils of sharks and rays, teeth, dermal denticles, and caudal spines were discovered in deposits from Aquitanian to Piacenzian (Neogene). About 105 deposits were identified and studied on the mainland and on the Island of Santa Maria, most of which have disappeared or are currently inaccessible. In total, 36 publications list 91 species of Chondrichthyes, 11 of which were described for the first time in Portugal, and 61 genera. Twelve orders are represented in the material published so far.
{"title":"Fossil Chondrichthyes from the Neogene of Portugal: Diversity and Occurrence","authors":"P. Fialho, A. Balbino, M. Antunes","doi":"10.11137/1982-3908_2021_44_43395","DOIUrl":"https://doi.org/10.11137/1982-3908_2021_44_43395","url":null,"abstract":"Portugal has a rich fossil record both on the continent and in the Azores islands (Santa Maria). For decades, researchers have found thousands of fossils and identified hundreds of species from major taxonomic groups. The present work focuses on analyzing the scientific literature on fossils of Chondrichthyes collected in fossiliferous deposits of the Neogene. Fossils of sharks and rays, teeth, dermal denticles, and caudal spines were discovered in deposits from Aquitanian to Piacenzian (Neogene). About 105 deposits were identified and studied on the mainland and on the Island of Santa Maria, most of which have disappeared or are currently inaccessible. In total, 36 publications list 91 species of Chondrichthyes, 11 of which were described for the first time in Portugal, and 61 genera. Twelve orders are represented in the material published so far.","PeriodicalId":39973,"journal":{"name":"Anuario do Instituto de Geociencias","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-12-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41452040","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-12-22DOI: 10.11137/1982-3908_2021_44_43313
C. Corrêa, Fábio Augusto Gomes Vieira Reis, L. C. Giordano, V. Cabral, M. Gramani, B. M. Gabelini, Beatriz Guzzo Duz, V. Veloso
This work aims to evaluate the potential for the debris-flow triggering from Santo Antônio hydrographic basin, located in the Serra do Mar region on North Coast of the State of São Paulo, Brazil, based on physiographic attributes, rainfall data, and morphometric parameters. For this purpose, hydrographic basin techniques were applied, assessing the vulnerability to the debris flow from geomorphological, geological, climatic, and anthropic aspects, and morphometric parameters relevant to the triggering of these processes in watersheds were calculated. Seven physiographic units were identified, which supported the understanding of geological and geomorphological aspects of the basin: coastal plains; river plains; colluvium and talus ramps; escarpments of Serra do Mar; upland of Paraitinga; mountainous relief and hillocks domain. The sub-basins located in steep sections of the relief, with high slopes, valleys, and channels docked, high drainage densities present higher values in the morphometric parameters, indicating a greater potential for triggering and occurrence of debris-flow processes. The joint analysis of physiographic compartmentalization with the identification of relief features, slope, amplitude, valley, slope shapes and morphometric parameters, is extremely relevant to recognize hydrographic basins susceptible to debris flows, as it integrates, and correlates aspects of the physical environment considered to trigger in the occurrence of these processes.
这项工作旨在根据自然地理属性、降雨数据和形态测量参数，评估位于巴西圣保罗州北海岸Serra do Mar地区的Santo Antônio水文盆地引发泥石流的可能性。为此，应用了水文流域技术，从地貌、地质、气候和人文方面评估了泥石流的脆弱性，并计算了与触发流域这些过程相关的形态参数。确定了七个地貌单元，有助于了解盆地的地质和地貌方面：沿海平原；河流平原；崩积层和堆积斜坡；Serra do Mar的悬崖；Paraitinga高地；山地起伏和丘陵地带。子盆地位于地形的陡峭部分，具有高斜坡、山谷和对接的通道，高排水密度在形态参数中表现出更高的值，表明触发和发生泥石流过程的可能性更大。通过识别地形特征、坡度、幅度、山谷、斜坡形状和形态参数，对地貌分区进行联合分析，对于识别易受泥石流影响的水文盆地极为重要，因为它整合并关联了被认为会引发这些过程的物理环境的各个方面。
{"title":"Assessment of the Potentiality to the Debris-Flow Occurrence from Physiographic and Morphometrics Parameters: a Case Study in Santo Antônio Basin (Caraguatatuba, São Paulo State, Brazil)","authors":"C. Corrêa, Fábio Augusto Gomes Vieira Reis, L. C. Giordano, V. Cabral, M. Gramani, B. M. Gabelini, Beatriz Guzzo Duz, V. Veloso","doi":"10.11137/1982-3908_2021_44_43313","DOIUrl":"https://doi.org/10.11137/1982-3908_2021_44_43313","url":null,"abstract":"This work aims to evaluate the potential for the debris-flow triggering from Santo Antônio hydrographic basin, located in the Serra do Mar region on North Coast of the State of São Paulo, Brazil, based on physiographic attributes, rainfall data, and morphometric parameters. For this purpose, hydrographic basin techniques were applied, assessing the vulnerability to the debris flow from geomorphological, geological, climatic, and anthropic aspects, and morphometric parameters relevant to the triggering of these processes in watersheds were calculated. Seven physiographic units were identified, which supported the understanding of geological and geomorphological aspects of the basin: coastal plains; river plains; colluvium and talus ramps; escarpments of Serra do Mar; upland of Paraitinga; mountainous relief and hillocks domain. The sub-basins located in steep sections of the relief, with high slopes, valleys, and channels docked, high drainage densities present higher values in the morphometric parameters, indicating a greater potential for triggering and occurrence of debris-flow processes. The joint analysis of physiographic compartmentalization with the identification of relief features, slope, amplitude, valley, slope shapes and morphometric parameters, is extremely relevant to recognize hydrographic basins susceptible to debris flows, as it integrates, and correlates aspects of the physical environment considered to trigger in the occurrence of these processes.","PeriodicalId":39973,"journal":{"name":"Anuario do Instituto de Geociencias","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-12-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48774485","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-12-22DOI: 10.11137/1982-3908_2021_44_43166
J. Sousa, A. Á. M. Gadelha, Luzia Suerlange Araújo dos Santos Mendes, Cláudio Ângelo da Silva Neto, A. Salgueiro, I. N. Cavalcante
In regions with semi-arid characteristics, groundwater is a precious source of water supply, mainly from alluvium, due to the decent quality of its waters. However, the sandy texture favors vulnerability, and the infiltration and percolation of fluids increase the risk of contamination of the aquifer in the presence of polluting sources. The population’s knowledge about these problems is still ephemeral, which can lead to the consumption of contaminated water, putting health at risk. Thus, research was conducted in the municipality of Russas – Ceará, to study the quality of groundwater, the possible polluting sources in the urban area, and assess the possible risks to human health. First, technical visits for reconnaissance and survey of information were conducted, such as possible polluting sources and situations of existing wells. The selection of wells to collect water followed criteria of proximity to polluting sources, well conditions, and, mainly, those linked to the use of water for human consumption. The result showed that 43% of the samples are above the limits proved by Brazilian legislation for turbidity, total hardness, TDS, sodium, chloride, and nitrate, while the others are withinthe standard. Concerning chlorides and nitrates, the concentrations show there is possibly a relationship with anthropic contaminants(agricultural area; domestic effluents) for the aquifer recharge areas and condition common problems to human health. Therefore, it is of paramount importance to continue research in Medical Geology that will enable the monitoring and future management of water quality of groundwater for the population.
{"title":"Anthropic Influences on the Quality of Underground Waters for Human Consumption in Russas, Ceará, Northeastern Brazil","authors":"J. Sousa, A. Á. M. Gadelha, Luzia Suerlange Araújo dos Santos Mendes, Cláudio Ângelo da Silva Neto, A. Salgueiro, I. N. Cavalcante","doi":"10.11137/1982-3908_2021_44_43166","DOIUrl":"https://doi.org/10.11137/1982-3908_2021_44_43166","url":null,"abstract":"In regions with semi-arid characteristics, groundwater is a precious source of water supply, mainly from alluvium, due to the decent quality of its waters. However, the sandy texture favors vulnerability, and the infiltration and percolation of fluids increase the risk of contamination of the aquifer in the presence of polluting sources. The population’s knowledge about these problems is still ephemeral, which can lead to the consumption of contaminated water, putting health at risk. Thus, research was conducted in the municipality of Russas – Ceará, to study the quality of groundwater, the possible polluting sources in the urban area, and assess the possible risks to human health. First, technical visits for reconnaissance and survey of information were conducted, such as possible polluting sources and situations of existing wells. The selection of wells to collect water followed criteria of proximity to polluting sources, well conditions, and, mainly, those linked to the use of water for human consumption. The result showed that 43% of the samples are above the limits proved by Brazilian legislation for turbidity, total hardness, TDS, sodium, chloride, and nitrate, while the others are withinthe standard. Concerning chlorides and nitrates, the concentrations show there is possibly a relationship with anthropic contaminants(agricultural area; domestic effluents) for the aquifer recharge areas and condition common problems to human health. Therefore, it is of paramount importance to continue research in Medical Geology that will enable the monitoring and future management of water quality of groundwater for the population.","PeriodicalId":39973,"journal":{"name":"Anuario do Instituto de Geociencias","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-12-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43315376","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-12-22DOI: 10.11137/1982-3908_2021_44_41536
Bárbara Honório dos Santos, Ricardo Eustáquio Fonseca Filho, P. Castro
{"title":"Perfil do Potencial Geoturista Urbano de Ouro Preto (MG)","authors":"Bárbara Honório dos Santos, Ricardo Eustáquio Fonseca Filho, P. Castro","doi":"10.11137/1982-3908_2021_44_41536","DOIUrl":"https://doi.org/10.11137/1982-3908_2021_44_41536","url":null,"abstract":"","PeriodicalId":39973,"journal":{"name":"Anuario do Instituto de Geociencias","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-12-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49622831","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-12-22DOI: 10.11137/1982-3908_2021_44_40331
João Marcus Vale Caetano, Júlia Mayer De Araujo, L. Peixinho, L. Ponciano
A Geomitologia da Pedra da Onça apresenta uma ampla influência cultural sobre os moradores da Ilha do Governador (Rio de Janeiro, RJ). As variantes dessa história têm como parte em comum a transformação de um felídeo em rocha (petrificação), possibilitando a divulgação dos elementos locais da geodiversidade e biodiversidade por meio de uma abordagem lúdica, visando à conservação do Patrimônio Natural e Cultural. Para alcançar tal objetivo, o presente estudo elaborou uma recriação do mito por meio da substituição da onça e do gato-maracajá (os dois animais citados nas variantes) pelo Smilodon populator, animal extinto cuja ocorrência pretérita é bem documentada no Brasil. Além disso, o presente estudo demonstra o potencial de tal metodologia para o ensino da história evolutiva de grupos biológicos, uma vez que se faz presente aqui também um breve resumo sobre a evolução no grupo interno dos Felidae, além de abordar os hábitos de vida do gato-maracajá (Leopardus wiedii) e de Smilodon. Como a história evolutiva de Felidae está intrinsecamente relacionada a ambos os táxons referidos, o método aqui empregado revela um notável potencial para a divulgação e ensino de Geociências e Biologia.
Stone Onça的风水学对Governador岛（里约热内卢，RJ）的居民产生了广泛的文化影响。这个故事的变体有一个共同的部分，那就是将猫变成岩石（石化），通过一种有趣的方法传播当地的地理多样性和生物多样性元素，旨在保护自然和文化遗产。为了实现这一目标，本研究通过用Smilodon populator取代美洲豹和马拉卡亚猫（变体中提到的两种动物）来再现神话，Smilodon是一种已灭绝的动物，其过去的发生在巴西有充分的记录。此外，本研究证明了这种方法在教授生物群进化史方面的潜力，因为除了解决马拉卡猫（Leopardus wiedii）和Smilodon的生活习惯外，本研究还简要总结了猫科动物内部群的进化。由于猫科动物的进化史与这两个分类群有着内在的联系，因此本文所采用的方法在地球科学和生物学的传播和教学方面具有巨大的潜力。
{"title":"Geomitologia da Pedra da Onça: Conservação do Patrimônio Natural e Cultural por meio da História do Gato-maracajá, o Verdadeiro Felino da Ilha do Governador, Rio de Janeiro, RJ","authors":"João Marcus Vale Caetano, Júlia Mayer De Araujo, L. Peixinho, L. Ponciano","doi":"10.11137/1982-3908_2021_44_40331","DOIUrl":"https://doi.org/10.11137/1982-3908_2021_44_40331","url":null,"abstract":"A Geomitologia da Pedra da Onça apresenta uma ampla influência cultural sobre os moradores da Ilha do Governador (Rio de Janeiro, RJ). As variantes dessa história têm como parte em comum a transformação de um felídeo em rocha (petrificação), possibilitando a divulgação dos elementos locais da geodiversidade e biodiversidade por meio de uma abordagem lúdica, visando à conservação do Patrimônio Natural e Cultural. Para alcançar tal objetivo, o presente estudo elaborou uma recriação do mito por meio da substituição da onça e do gato-maracajá (os dois animais citados nas variantes) pelo Smilodon populator, animal extinto cuja ocorrência pretérita é bem documentada no Brasil. Além disso, o presente estudo demonstra o potencial de tal metodologia para o ensino da história evolutiva de grupos biológicos, uma vez que se faz presente aqui também um breve resumo sobre a evolução no grupo interno dos Felidae, além de abordar os hábitos de vida do gato-maracajá (Leopardus wiedii) e de Smilodon. Como a história evolutiva de Felidae está intrinsecamente relacionada a ambos os táxons referidos, o método aqui empregado revela um notável potencial para a divulgação e ensino de Geociências e Biologia.","PeriodicalId":39973,"journal":{"name":"Anuario do Instituto de Geociencias","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-12-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47653700","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-12-16DOI: 10.11137/1982-3908_2021_44_38730
K. Hasni, B. Gourine, Houaria Namaoui, Mohammed El Amin Larabi, S. Allal
Synthetic Aperture Radar (SAR) satellite imagery is a source of data widely employed in the quantification and analysis of an earthquake coseismic displacement. However, due to the signal path along the atmosphere and to other sources, the interferometric phase becomes compromised. In this work, a methodology for the correction of tropospheric and orbital errors in the differential interferogram is presented. This methodology was applied to a couple of Sentinel-1A data. The phenomenon studied was the 11th November 2018 Zeribet el Oued earthquake, Mw. 5.2 (The state of Biskra, South East of Algeria). It was possible to correct both tropospheric and orbital errors, where the dominant one was the tropospheric delay, a displacement error of 4 cm was added to the differential interferogram by this noise source. The correction of orbital error led to a better interpretation of the coseismic displacement.
{"title":"Joint Correction of Tropospheric and Orbital Errors in SAR Differential Interferograms","authors":"K. Hasni, B. Gourine, Houaria Namaoui, Mohammed El Amin Larabi, S. Allal","doi":"10.11137/1982-3908_2021_44_38730","DOIUrl":"https://doi.org/10.11137/1982-3908_2021_44_38730","url":null,"abstract":"Synthetic Aperture Radar (SAR) satellite imagery is a source of data widely employed in the quantification and analysis of an earthquake coseismic displacement. However, due to the signal path along the atmosphere and to other sources, the interferometric phase becomes compromised. In this work, a methodology for the correction of tropospheric and orbital errors in the differential interferogram is presented. This methodology was applied to a couple of Sentinel-1A data. The phenomenon studied was the 11th November 2018 Zeribet el Oued earthquake, Mw. 5.2 (The state of Biskra, South East of Algeria). It was possible to correct both tropospheric and orbital errors, where the dominant one was the tropospheric delay, a displacement error of 4 cm was added to the differential interferogram by this noise source. The correction of orbital error led to a better interpretation of the coseismic displacement. ","PeriodicalId":39973,"journal":{"name":"Anuario do Instituto de Geociencias","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-12-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47225315","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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