Pub Date : 2021-11-03DOI: 10.1109/RPIC53795.2021.9648523
Lautaro Estienne
Mathematical models for the generation of the action potential can improve the understanding of physiological mechanisms that are consequence of the electrical activity in neurons. In such models, some equations involving empirically obtained functions of the membrane potential are usually defined. The best known of these models, the Hodgkin-Huxley model, is an example of this paradigm since it defines the conductances of ion channels in terms of the opening and closing rates of each type of gate present in the channels. These functions need to be derived from laboratory measurements that are often very expensive and produce little data because they involve a time-space-independent measurement of the voltage in a single channel of the cell membrane. In this work, we investigate the possibility of finding the Hodgkin-Huxley model’s parametric functions using only two simple measurements (the membrane voltage as a function of time and the injected current that triggered that voltage) and applying Deep Learning methods to estimate these functions. This would result in an hybrid model of the action potential generation composed by the original Hodgkin-Huxley equations and an Artificial Neural Network that requires a small set of easy-to-perform measurements to be trained. Experiments were carried out using data generated from the original Hodgkin-Huxley model, and results show that a simple two-layer artificial neural network (ANN) architecture trained on a minimal amount of data can learn to model some of the fundamental proprieties of the action potential generation by estimating the model’s rate functions.
{"title":"Towards an Hybrid Hodgkin-Huxley Action Potential Generation Model","authors":"Lautaro Estienne","doi":"10.1109/RPIC53795.2021.9648523","DOIUrl":"https://doi.org/10.1109/RPIC53795.2021.9648523","url":null,"abstract":"Mathematical models for the generation of the action potential can improve the understanding of physiological mechanisms that are consequence of the electrical activity in neurons. In such models, some equations involving empirically obtained functions of the membrane potential are usually defined. The best known of these models, the Hodgkin-Huxley model, is an example of this paradigm since it defines the conductances of ion channels in terms of the opening and closing rates of each type of gate present in the channels. These functions need to be derived from laboratory measurements that are often very expensive and produce little data because they involve a time-space-independent measurement of the voltage in a single channel of the cell membrane. In this work, we investigate the possibility of finding the Hodgkin-Huxley model’s parametric functions using only two simple measurements (the membrane voltage as a function of time and the injected current that triggered that voltage) and applying Deep Learning methods to estimate these functions. This would result in an hybrid model of the action potential generation composed by the original Hodgkin-Huxley equations and an Artificial Neural Network that requires a small set of easy-to-perform measurements to be trained. Experiments were carried out using data generated from the original Hodgkin-Huxley model, and results show that a simple two-layer artificial neural network (ANN) architecture trained on a minimal amount of data can learn to model some of the fundamental proprieties of the action potential generation by estimating the model’s rate functions.","PeriodicalId":299649,"journal":{"name":"2021 XIX Workshop on Information Processing and Control (RPIC)","volume":"112 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-11-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117198731","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 : 2021-11-03DOI: 10.1109/RPIC53795.2021.9648491
Vazquez Raimundo, Mason Favio
In this paper, a strategy to estimate the intention of the driver seconds before entering a roundabout is presented. In real situations, detecting that a driver is going to turn in a particular direction at the time of entering the roundabout is not enough to implement risk reduction strategies. It is then critical to recognize in advance the possible actions of the drivers. The proposed method uses kinematic and position information of a vehicle a few meters before the beginning of the roundabout to feed a neural network based on Long Short-Term Memory or LSTM models, allowing to predict the probability that the vehicle will turn right, left, or go straight before entering the roundabout.
{"title":"Driver intention prediction at roundabouts","authors":"Vazquez Raimundo, Mason Favio","doi":"10.1109/RPIC53795.2021.9648491","DOIUrl":"https://doi.org/10.1109/RPIC53795.2021.9648491","url":null,"abstract":"In this paper, a strategy to estimate the intention of the driver seconds before entering a roundabout is presented. In real situations, detecting that a driver is going to turn in a particular direction at the time of entering the roundabout is not enough to implement risk reduction strategies. It is then critical to recognize in advance the possible actions of the drivers. The proposed method uses kinematic and position information of a vehicle a few meters before the beginning of the roundabout to feed a neural network based on Long Short-Term Memory or LSTM models, allowing to predict the probability that the vehicle will turn right, left, or go straight before entering the roundabout.","PeriodicalId":299649,"journal":{"name":"2021 XIX Workshop on Information Processing and Control (RPIC)","volume":"220 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-11-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122462506","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 : 2021-11-03DOI: 10.1109/RPIC53795.2021.9648510
M. Meira, C. Verucchi, A. Castellino, Guillermo R. Bossio
This paper proposes to use the full spectrum of the stator currents during the starting transient of three-phase induction motors to detect broken rotor bars and mixed eccentricity. The full spectrum contributes to a more accurate diagnosis for some fault conditions with respect to traditional steady-state MCSA techniques or modern techniques such as the spectrogram of a stator current during the starting transient. The temporal evolution of the components associated with these faults is analyzed. The proposed strategy is validated through simulation results.
{"title":"Detection of broken rotor bars and eccentricity during the starting transient of three-phase induction motors","authors":"M. Meira, C. Verucchi, A. Castellino, Guillermo R. Bossio","doi":"10.1109/RPIC53795.2021.9648510","DOIUrl":"https://doi.org/10.1109/RPIC53795.2021.9648510","url":null,"abstract":"This paper proposes to use the full spectrum of the stator currents during the starting transient of three-phase induction motors to detect broken rotor bars and mixed eccentricity. The full spectrum contributes to a more accurate diagnosis for some fault conditions with respect to traditional steady-state MCSA techniques or modern techniques such as the spectrogram of a stator current during the starting transient. The temporal evolution of the components associated with these faults is analyzed. The proposed strategy is validated through simulation results.","PeriodicalId":299649,"journal":{"name":"2021 XIX Workshop on Information Processing and Control (RPIC)","volume":"74 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-11-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122016976","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 : 2021-11-03DOI: 10.1109/RPIC53795.2021.9648469
Sara Montoya A, María C. Yepes R, Cuscagua L. Juan D, Elizabeth Hoyos P, Yesid Montoya G, Hernán D. Álvarez Z
This document presents a control-oriented strategy to predict temperature distribution during the friction stir welding (FSW) process. The proposal uses a programming platform that solves heat transfer problems based on material thermal properties and geometry, internal and external heat sources, and boundary conditions for transient problems. Finally, the strategy provides a single equation for predict the heat dissipation from operative FSW parameters. The results are evaluated by comparing experimental and simulated temperature results and coherence between predicted and experimental temperature distributions. A model such as the presented allows designing a model-based control structure for the FSW process. In that sense, the weld quality is the controlled variable and the options for manipulated variables are the travel and rotational speeds of the tool.
{"title":"Control oriented prediction for FSW based on experimental data and conventional software tools","authors":"Sara Montoya A, María C. Yepes R, Cuscagua L. Juan D, Elizabeth Hoyos P, Yesid Montoya G, Hernán D. Álvarez Z","doi":"10.1109/RPIC53795.2021.9648469","DOIUrl":"https://doi.org/10.1109/RPIC53795.2021.9648469","url":null,"abstract":"This document presents a control-oriented strategy to predict temperature distribution during the friction stir welding (FSW) process. The proposal uses a programming platform that solves heat transfer problems based on material thermal properties and geometry, internal and external heat sources, and boundary conditions for transient problems. Finally, the strategy provides a single equation for predict the heat dissipation from operative FSW parameters. The results are evaluated by comparing experimental and simulated temperature results and coherence between predicted and experimental temperature distributions. A model such as the presented allows designing a model-based control structure for the FSW process. In that sense, the weld quality is the controlled variable and the options for manipulated variables are the travel and rotational speeds of the tool.","PeriodicalId":299649,"journal":{"name":"2021 XIX Workshop on Information Processing and Control (RPIC)","volume":"34 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-11-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126664010","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 : 2021-11-03DOI: 10.1109/RPIC53795.2021.9648449
Mauro González Vera, P. Cometto, Juan M. Casañas
This work aims to evaluate the efficiency of 3 sampling probes for aerosol measurements with an optical aerosol counter integrated in an Unmanned Aerial Vehicle (UAV). Consequently, a linear numerical software that performs a systemic analysis of its performance for different design characteristic values was developed. The software estimates the sampling efficiency of particulate matter as a function of the aerodynamic diameters within the measurement system inlet, by considering losses due to transport phenomena to the aerosol counter. The results show the relevance of evaluating the performance in different flight conditions for decision-making in the design phase. The design assessment indicates that the best performance could be achieved with a short straight pipe sampling probe, which minimizes losses in a wide range of particle sizes.
{"title":"Assessment of the Efficiency vs Particle Size for Three Airborne Aerosol Sampling Probes. Computational Simulations","authors":"Mauro González Vera, P. Cometto, Juan M. Casañas","doi":"10.1109/RPIC53795.2021.9648449","DOIUrl":"https://doi.org/10.1109/RPIC53795.2021.9648449","url":null,"abstract":"This work aims to evaluate the efficiency of 3 sampling probes for aerosol measurements with an optical aerosol counter integrated in an Unmanned Aerial Vehicle (UAV). Consequently, a linear numerical software that performs a systemic analysis of its performance for different design characteristic values was developed. The software estimates the sampling efficiency of particulate matter as a function of the aerodynamic diameters within the measurement system inlet, by considering losses due to transport phenomena to the aerosol counter. The results show the relevance of evaluating the performance in different flight conditions for decision-making in the design phase. The design assessment indicates that the best performance could be achieved with a short straight pipe sampling probe, which minimizes losses in a wide range of particle sizes.","PeriodicalId":299649,"journal":{"name":"2021 XIX Workshop on Information Processing and Control (RPIC)","volume":"52 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-11-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121951349","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 : 2021-11-03DOI: 10.1109/RPIC53795.2021.9648416
Diego Larrahondo, E. Quispe
The global warming resulting from the use of fossil fuels is putting pressure on governments to formulate and adopt energy policies aimed at different sectors of the economy. One of the most significant measures in this direction is industrial energy efficiency, a subject that concerns SMEs. An SME was identified in the Valle del Cauca region that recognized the economic and environmental need to have a more efficient system, especially in energy consumption. A bakery company met the requirements, this company has whole wheat bread as its main product. Likewise, during its operating time, an energy performance study has not been carried out, which leads to not knowing if they make adequate use of energy, be it electrical or in the form of heat, which can cause inefficiencies in their processes.Keeping these aspects in mind, in this article an energy audit process was implemented in the bakery company, according to the guidelines of ISO 50002; structuring the stages of the audit process, using a flow diagram; identifying different opportunities for improving energy performance for equipment with higher consumption and therefore greater savings potential; evaluating these improvement opportunities, which are linked to the change of operation and maintenance; and generating recommendations that make it possible to make correct decisions regarding energy consumption and thus reduce costs of this nature.
{"title":"Energy Audit Implementation According to ISO 50002 Standard in a Bakery Company","authors":"Diego Larrahondo, E. Quispe","doi":"10.1109/RPIC53795.2021.9648416","DOIUrl":"https://doi.org/10.1109/RPIC53795.2021.9648416","url":null,"abstract":"The global warming resulting from the use of fossil fuels is putting pressure on governments to formulate and adopt energy policies aimed at different sectors of the economy. One of the most significant measures in this direction is industrial energy efficiency, a subject that concerns SMEs. An SME was identified in the Valle del Cauca region that recognized the economic and environmental need to have a more efficient system, especially in energy consumption. A bakery company met the requirements, this company has whole wheat bread as its main product. Likewise, during its operating time, an energy performance study has not been carried out, which leads to not knowing if they make adequate use of energy, be it electrical or in the form of heat, which can cause inefficiencies in their processes.Keeping these aspects in mind, in this article an energy audit process was implemented in the bakery company, according to the guidelines of ISO 50002; structuring the stages of the audit process, using a flow diagram; identifying different opportunities for improving energy performance for equipment with higher consumption and therefore greater savings potential; evaluating these improvement opportunities, which are linked to the change of operation and maintenance; and generating recommendations that make it possible to make correct decisions regarding energy consumption and thus reduce costs of this nature.","PeriodicalId":299649,"journal":{"name":"2021 XIX Workshop on Information Processing and Control (RPIC)","volume":"394 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-11-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133906990","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 : 2021-11-03DOI: 10.1109/RPIC53795.2021.9648417
Vinícius Pacheco Bacheti, Alexandre Santos Brandão, M. Sarcinelli-Filho
This work addresses the control of a formation composed by an unmanned ground vehicle (UGV) and an unmanned aerial vehicle (UAV), using the concept of control based on null space. The formation navigates in a coordinated manner, with the UAV following the UGV, maintaining a set pose relative to it, while the UGV follows a given path. The goal is to guide the UAV to land on the UGV at any desired time, a situation quite similar to returning the UAV to a mobile base after delivering a package. The null space-based control techniques is used to obtain more precise control of the relative posture between the robots, increasing the reliability of the landing operation. Experimental results are presented and discussed, which validate the proposed approach to accomplish the desired task.
{"title":"Path-Following by a UAV-UGV Formation Using Null Space-Based Control","authors":"Vinícius Pacheco Bacheti, Alexandre Santos Brandão, M. Sarcinelli-Filho","doi":"10.1109/RPIC53795.2021.9648417","DOIUrl":"https://doi.org/10.1109/RPIC53795.2021.9648417","url":null,"abstract":"This work addresses the control of a formation composed by an unmanned ground vehicle (UGV) and an unmanned aerial vehicle (UAV), using the concept of control based on null space. The formation navigates in a coordinated manner, with the UAV following the UGV, maintaining a set pose relative to it, while the UGV follows a given path. The goal is to guide the UAV to land on the UGV at any desired time, a situation quite similar to returning the UAV to a mobile base after delivering a package. The null space-based control techniques is used to obtain more precise control of the relative posture between the robots, increasing the reliability of the landing operation. Experimental results are presented and discussed, which validate the proposed approach to accomplish the desired task.","PeriodicalId":299649,"journal":{"name":"2021 XIX Workshop on Information Processing and Control (RPIC)","volume":"7 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-11-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131827694","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 : 2021-11-03DOI: 10.1109/RPIC53795.2021.9648428
Pablo Facundo Orte, Anabela Lusi, Facundo Carmona, R. D’Elia, A. Faramiñán, E. Wolfram
Accurate information of solar radiation from satellites is crucial for many applications, mainly in regions with lack of ground-based measurements. In this sense, comparison with ground-based measurement is necessary to ensure the reliability of the information. In this work, the daily global solar irradiation data from NASA’s Prediction of Worldwide Energy Resources (NASA-POWER; power.larc.nasa.gov) were compared with ground-based measurements in the 8 stations of the Saver-Net solar irradiance network (http://www.savernet-satreps.org/en) installed in the south of South America. A linear regression analysis was performed to analyze the agreement between satellite data and ground-based measurements. The coefficient of determination shows very good correspondence with a mean value of 0.95. The mean absolute error (0.63 kWh/m2/d) and the root mean squared error (0.48 kWh/m2/d) reflect a low difference.
{"title":"Comparison of NASA-POWER solar radiation data with ground-based measurements in the south of South America","authors":"Pablo Facundo Orte, Anabela Lusi, Facundo Carmona, R. D’Elia, A. Faramiñán, E. Wolfram","doi":"10.1109/RPIC53795.2021.9648428","DOIUrl":"https://doi.org/10.1109/RPIC53795.2021.9648428","url":null,"abstract":"Accurate information of solar radiation from satellites is crucial for many applications, mainly in regions with lack of ground-based measurements. In this sense, comparison with ground-based measurement is necessary to ensure the reliability of the information. In this work, the daily global solar irradiation data from NASA’s Prediction of Worldwide Energy Resources (NASA-POWER; power.larc.nasa.gov) were compared with ground-based measurements in the 8 stations of the Saver-Net solar irradiance network (http://www.savernet-satreps.org/en) installed in the south of South America. A linear regression analysis was performed to analyze the agreement between satellite data and ground-based measurements. The coefficient of determination shows very good correspondence with a mean value of 0.95. The mean absolute error (0.63 kWh/m2/d) and the root mean squared error (0.48 kWh/m2/d) reflect a low difference.","PeriodicalId":299649,"journal":{"name":"2021 XIX Workshop on Information Processing and Control (RPIC)","volume":"96 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-11-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117025086","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 : 2021-11-03DOI: 10.1109/RPIC53795.2021.9648528
E. Slawiñski, Leopoldo Slawiñski, D. Santiago, L. Salinas, V. Mut
This paper presents the design of the robot RAT20 (Teleoperated Argentine Robot), a mobile dual-arm robot system developed as a research platform for studying multidisciplinary aspects about remote mobile manipulation. The robot allows in a single platform, to perform research in most of the areas involved in autonomous and teleoperated robotics such as: navigation, mobile and dual-arm manipulation, planning, active compliance and force control strategies, collision detection, human-robot interaction, delay compensation and force feedback, among others. RAT has 20 degrees of freedom, including 12-DOF for two arms, 2-DOF torso, 1-DOF head, and a mobile base equipped with four in-wheel brushless motors. The sensors include a 360 camera, depth camera, laser lidar, current, position and velocity sensors, and a mapping and localization system based on visual SLAM. The robot can be driven from a base station composed for haptic devices and a wireless joystick or pedals. The paper provides an overview of the design, especially in the control area, as well as of its development, the sensors incorporated in the system, and its software, achieving a prototype system for research, education and base platform for possible extensions and adaptions to applications in field from disinfection and cleaning tasks until explosive neutralization.
本文介绍了RAT20 (Teleoperated argentina robot)机器人的设计。RAT20是一种移动双臂机器人系统，是研究远程移动操作多学科方面的研究平台。该机器人允许在一个单一的平台上，在自主和远程操作机器人所涉及的大多数领域进行研究，如:导航，移动和双臂操作，规划，主动顺应和力控制策略，碰撞检测，人机交互，延迟补偿和力反馈等。RAT具有20个自由度，包括两个手臂的12自由度，躯干的2自由度，头部的1自由度，以及配备四个轮内无刷电机的移动基座。传感器包括一个360摄像头、深度摄像头、激光雷达、电流、位置和速度传感器，以及一个基于视觉SLAM的地图和定位系统。机器人可以从由触觉装置和无线操纵杆或踏板组成的基站驱动。本文概述了设计，特别是在控制领域，以及它的发展，传感器纳入系统，它的软件，实现了一个原型系统的研究，教育和基础平台的可能扩展和适应应用领域，从消毒和清洁任务，直到爆炸中和。
{"title":"RAT20 Teleoperated Argentine Robot","authors":"E. Slawiñski, Leopoldo Slawiñski, D. Santiago, L. Salinas, V. Mut","doi":"10.1109/RPIC53795.2021.9648528","DOIUrl":"https://doi.org/10.1109/RPIC53795.2021.9648528","url":null,"abstract":"This paper presents the design of the robot RAT20 (Teleoperated Argentine Robot), a mobile dual-arm robot system developed as a research platform for studying multidisciplinary aspects about remote mobile manipulation. The robot allows in a single platform, to perform research in most of the areas involved in autonomous and teleoperated robotics such as: navigation, mobile and dual-arm manipulation, planning, active compliance and force control strategies, collision detection, human-robot interaction, delay compensation and force feedback, among others. RAT has 20 degrees of freedom, including 12-DOF for two arms, 2-DOF torso, 1-DOF head, and a mobile base equipped with four in-wheel brushless motors. The sensors include a 360 camera, depth camera, laser lidar, current, position and velocity sensors, and a mapping and localization system based on visual SLAM. The robot can be driven from a base station composed for haptic devices and a wireless joystick or pedals. The paper provides an overview of the design, especially in the control area, as well as of its development, the sensors incorporated in the system, and its software, achieving a prototype system for research, education and base platform for possible extensions and adaptions to applications in field from disinfection and cleaning tasks until explosive neutralization.","PeriodicalId":299649,"journal":{"name":"2021 XIX Workshop on Information Processing and Control (RPIC)","volume":"22 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-11-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124856250","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 : 2021-11-03DOI: 10.1109/RPIC53795.2021.9648456
Maximiliano Arena, A. L. Delgado, P. Pratolongo, Carla Celleri, Alejandro J. Vitale
AERONET-OC collects data from worldwide distributed autonomous CE-318 sun-photometers adapted to provide measurements of the radiance emerging from the sea (i.e., water-leaving radiance). The network supports satellite ocean color validation activities through standardized measurements performed at different sites with a single measuring system and protocol. In January 2020 the Bahía Blanca site was established at the mouth of the main navigation channel of the Bahía Blanca Estuary, a complex system where widespread erosion and strong tidal currents are responsible for the typically high suspended loads in the channel. In this work we present a validation of three different algorithms for the atmospheric correction of Landsat-OLI scenes over the area, based on AERONET-OC data and in situ measurements obtained with a hand-held spectroradiometer. Surface remote sensing reflectance was used to retrieve satellite turbidity and the algorithm performance was tested using turbidity measurements obtained from water samples collected simultaneously with satellite overpasses. According to our results, the best fit was obtained with the atmospheric correction algorithm based on the black-pixel assumption, with the aerosol type estimated using the two OLI-SWIR bands and allowed to vary spatially (per pixel variable epsilon). The aerosol type changed along the estuary, with an epsilon parameter that commonly decreased from the inner section through the mouth. The regression line of in situ measurements with satellite turbidity showed a good performance (R2 = 0.97, n=20), with a high accuracy (RMSE = 4.03, NMAE= 0.16) and no tendency to over or underestimation (BIAS = 0.63). The application of properly validated algorithms to satellite data from high spatial resolution images allowed for the identification of detailed turbidity features in the estuary, resulting from re-suspension phenomena over banks and turbulent currents.
{"title":"Validation of the atmospheric correction of Landsat OLI imagery and turbidity retrievals using AERONET-OC data from the Bahía Blanca site","authors":"Maximiliano Arena, A. L. Delgado, P. Pratolongo, Carla Celleri, Alejandro J. Vitale","doi":"10.1109/RPIC53795.2021.9648456","DOIUrl":"https://doi.org/10.1109/RPIC53795.2021.9648456","url":null,"abstract":"AERONET-OC collects data from worldwide distributed autonomous CE-318 sun-photometers adapted to provide measurements of the radiance emerging from the sea (i.e., water-leaving radiance). The network supports satellite ocean color validation activities through standardized measurements performed at different sites with a single measuring system and protocol. In January 2020 the Bahía Blanca site was established at the mouth of the main navigation channel of the Bahía Blanca Estuary, a complex system where widespread erosion and strong tidal currents are responsible for the typically high suspended loads in the channel. In this work we present a validation of three different algorithms for the atmospheric correction of Landsat-OLI scenes over the area, based on AERONET-OC data and in situ measurements obtained with a hand-held spectroradiometer. Surface remote sensing reflectance was used to retrieve satellite turbidity and the algorithm performance was tested using turbidity measurements obtained from water samples collected simultaneously with satellite overpasses. According to our results, the best fit was obtained with the atmospheric correction algorithm based on the black-pixel assumption, with the aerosol type estimated using the two OLI-SWIR bands and allowed to vary spatially (per pixel variable epsilon). The aerosol type changed along the estuary, with an epsilon parameter that commonly decreased from the inner section through the mouth. The regression line of in situ measurements with satellite turbidity showed a good performance (R2 = 0.97, n=20), with a high accuracy (RMSE = 4.03, NMAE= 0.16) and no tendency to over or underestimation (BIAS = 0.63). The application of properly validated algorithms to satellite data from high spatial resolution images allowed for the identification of detailed turbidity features in the estuary, resulting from re-suspension phenomena over banks and turbulent currents.","PeriodicalId":299649,"journal":{"name":"2021 XIX Workshop on Information Processing and Control (RPIC)","volume":"127 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-11-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133004893","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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