The Experts below are selected from a list of 201 Experts worldwide ranked by ideXlab platform
Guang Liu - One of the best experts on this subject based on the ideXlab platform.
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The Geometry Numerical Simulation and Analysis for Moon-Based Earth Observation
IGARSS 2018 - 2018 IEEE International Geoscience and Remote Sensing Symposium, 2018Co-Authors: Guozhuang Shen, Hua Dong Guo, Guang LiuAbstract:Large-scale geoscience phenomena are increasingly attracting more attention because of their great scientific and social significance. However, many existing earth Observation systems lack the ability to conduct long-term continuous Observations at a regional-to-global scale because of spatial and temporal coverage limitations and systematic bias. Recently, the Moon, the unique Earth's natural satellite, was proposed as a new platform for earth Observation of large-scale geoscience phenomena. However, the geometry relationship between the Sun, Earth and Moon was the precondition to understand the moon-based earth Observation. In this work, a simulation system of moon-based earth Observation was developed based on the Jet Propulsion Laboratory ephemerides, the reference systems transformation, and which was implemented under the Microsoft. NET framework using C# language. In this system, we will carry out the following studies: (1) The position and attitude change rule of moon-based platform. The position and posture of moon are the main factors that affect the Earth Observation, which needs to be studied based on the relative motion law and the moon-based platform simulation system. Then, we will study the regularity of the position and the attitude periodicity of the moon-based platform. (2) The regularity of moon-based platform for Earth Observation. Based on the proposed moon-based Earth Observation simulation system, the changes of the solar angle, Observation angle, Observation Range, sub-satellite point position, twilight line, oblique distance and Observation period of the typical moon-based Earth Observation sensor are analyzed.
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IGARSS - The Geometry Numerical Simulation and Analysis for Moon-Based Earth Observation
IGARSS 2018 - 2018 IEEE International Geoscience and Remote Sensing Symposium, 2018Co-Authors: Guozhuang Shen, Hua Dong Guo, Guang LiuAbstract:Large-scale geoscience phenomena are increasingly attracting more attention because of their great scientific and social significance. However, many existing earth Observation systems lack the ability to conduct long-term continuous Observations at a regional-to-global scale because of spatial and temporal coverage limitations and systematic bias. Recently, the Moon, the unique Earth's natural satellite, was proposed as a new platform for earth Observation of large-scale geoscience phenomena. However, the geometry relationship between the Sun, Earth and Moon was the precondition to understand the moon-based earth Observation. In this work, a simulation system of moon-based earth Observation was developed based on the Jet Propulsion Laboratory ephemerides, the reference systems transformation, and which was implemented under the Microsoft. NET framework using C# language. In this system, we will carry out the following studies: (1) The position and attitude change rule of moon-based platform. The position and posture of moon are the main factors that affect the Earth Observation, which needs to be studied based on the relative motion law and the moon-based platform simulation system. Then, we will study the regularity of the position and the attitude periodicity of the moon-based platform. (2) The regularity of moon-based platform for Earth Observation. Based on the proposed moon-based Earth Observation simulation system, the changes of the solar angle, Observation angle, Observation Range, sub-satellite point position, twilight line, oblique distance and Observation period of the typical moon-based Earth Observation sensor are analyzed.
Guozhuang Shen - One of the best experts on this subject based on the ideXlab platform.
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The Geometry Numerical Simulation and Analysis for Moon-Based Earth Observation
IGARSS 2018 - 2018 IEEE International Geoscience and Remote Sensing Symposium, 2018Co-Authors: Guozhuang Shen, Hua Dong Guo, Guang LiuAbstract:Large-scale geoscience phenomena are increasingly attracting more attention because of their great scientific and social significance. However, many existing earth Observation systems lack the ability to conduct long-term continuous Observations at a regional-to-global scale because of spatial and temporal coverage limitations and systematic bias. Recently, the Moon, the unique Earth's natural satellite, was proposed as a new platform for earth Observation of large-scale geoscience phenomena. However, the geometry relationship between the Sun, Earth and Moon was the precondition to understand the moon-based earth Observation. In this work, a simulation system of moon-based earth Observation was developed based on the Jet Propulsion Laboratory ephemerides, the reference systems transformation, and which was implemented under the Microsoft. NET framework using C# language. In this system, we will carry out the following studies: (1) The position and attitude change rule of moon-based platform. The position and posture of moon are the main factors that affect the Earth Observation, which needs to be studied based on the relative motion law and the moon-based platform simulation system. Then, we will study the regularity of the position and the attitude periodicity of the moon-based platform. (2) The regularity of moon-based platform for Earth Observation. Based on the proposed moon-based Earth Observation simulation system, the changes of the solar angle, Observation angle, Observation Range, sub-satellite point position, twilight line, oblique distance and Observation period of the typical moon-based Earth Observation sensor are analyzed.
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IGARSS - The Geometry Numerical Simulation and Analysis for Moon-Based Earth Observation
IGARSS 2018 - 2018 IEEE International Geoscience and Remote Sensing Symposium, 2018Co-Authors: Guozhuang Shen, Hua Dong Guo, Guang LiuAbstract:Large-scale geoscience phenomena are increasingly attracting more attention because of their great scientific and social significance. However, many existing earth Observation systems lack the ability to conduct long-term continuous Observations at a regional-to-global scale because of spatial and temporal coverage limitations and systematic bias. Recently, the Moon, the unique Earth's natural satellite, was proposed as a new platform for earth Observation of large-scale geoscience phenomena. However, the geometry relationship between the Sun, Earth and Moon was the precondition to understand the moon-based earth Observation. In this work, a simulation system of moon-based earth Observation was developed based on the Jet Propulsion Laboratory ephemerides, the reference systems transformation, and which was implemented under the Microsoft. NET framework using C# language. In this system, we will carry out the following studies: (1) The position and attitude change rule of moon-based platform. The position and posture of moon are the main factors that affect the Earth Observation, which needs to be studied based on the relative motion law and the moon-based platform simulation system. Then, we will study the regularity of the position and the attitude periodicity of the moon-based platform. (2) The regularity of moon-based platform for Earth Observation. Based on the proposed moon-based Earth Observation simulation system, the changes of the solar angle, Observation angle, Observation Range, sub-satellite point position, twilight line, oblique distance and Observation period of the typical moon-based Earth Observation sensor are analyzed.
Jiabin Wu - One of the best experts on this subject based on the ideXlab platform.
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Observation Range measuring method based on incoherent digital holographic imaging
Optics and Lasers in Engineering, 2020Co-Authors: Hai Yu, Jiabin WuAbstract:Abstract An incoherent digital holographic imaging system was constructed in this study based on the Michelson interferometer, where the distance of the observed object can be calculated via mathematical modeling. We obtain the composite hologram by generalized phase-shifting method, then utilize the contrast evaluation function to determine the focus distance of composite hologram. The relationship between the focus distance and Observation distance is deduced accordingly to complete the measurement process. Experiments show that the uncertainty of the proposed method decreases as observed distance increases in the Range of 508 mm–660.4 mm. The results presented in this paper may provide a theoretical foundation for incoherent holographic imaging and three-dimensional measurement.
Hua Dong Guo - One of the best experts on this subject based on the ideXlab platform.
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The Geometry Numerical Simulation and Analysis for Moon-Based Earth Observation
IGARSS 2018 - 2018 IEEE International Geoscience and Remote Sensing Symposium, 2018Co-Authors: Guozhuang Shen, Hua Dong Guo, Guang LiuAbstract:Large-scale geoscience phenomena are increasingly attracting more attention because of their great scientific and social significance. However, many existing earth Observation systems lack the ability to conduct long-term continuous Observations at a regional-to-global scale because of spatial and temporal coverage limitations and systematic bias. Recently, the Moon, the unique Earth's natural satellite, was proposed as a new platform for earth Observation of large-scale geoscience phenomena. However, the geometry relationship between the Sun, Earth and Moon was the precondition to understand the moon-based earth Observation. In this work, a simulation system of moon-based earth Observation was developed based on the Jet Propulsion Laboratory ephemerides, the reference systems transformation, and which was implemented under the Microsoft. NET framework using C# language. In this system, we will carry out the following studies: (1) The position and attitude change rule of moon-based platform. The position and posture of moon are the main factors that affect the Earth Observation, which needs to be studied based on the relative motion law and the moon-based platform simulation system. Then, we will study the regularity of the position and the attitude periodicity of the moon-based platform. (2) The regularity of moon-based platform for Earth Observation. Based on the proposed moon-based Earth Observation simulation system, the changes of the solar angle, Observation angle, Observation Range, sub-satellite point position, twilight line, oblique distance and Observation period of the typical moon-based Earth Observation sensor are analyzed.
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IGARSS - The Geometry Numerical Simulation and Analysis for Moon-Based Earth Observation
IGARSS 2018 - 2018 IEEE International Geoscience and Remote Sensing Symposium, 2018Co-Authors: Guozhuang Shen, Hua Dong Guo, Guang LiuAbstract:Large-scale geoscience phenomena are increasingly attracting more attention because of their great scientific and social significance. However, many existing earth Observation systems lack the ability to conduct long-term continuous Observations at a regional-to-global scale because of spatial and temporal coverage limitations and systematic bias. Recently, the Moon, the unique Earth's natural satellite, was proposed as a new platform for earth Observation of large-scale geoscience phenomena. However, the geometry relationship between the Sun, Earth and Moon was the precondition to understand the moon-based earth Observation. In this work, a simulation system of moon-based earth Observation was developed based on the Jet Propulsion Laboratory ephemerides, the reference systems transformation, and which was implemented under the Microsoft. NET framework using C# language. In this system, we will carry out the following studies: (1) The position and attitude change rule of moon-based platform. The position and posture of moon are the main factors that affect the Earth Observation, which needs to be studied based on the relative motion law and the moon-based platform simulation system. Then, we will study the regularity of the position and the attitude periodicity of the moon-based platform. (2) The regularity of moon-based platform for Earth Observation. Based on the proposed moon-based Earth Observation simulation system, the changes of the solar angle, Observation angle, Observation Range, sub-satellite point position, twilight line, oblique distance and Observation period of the typical moon-based Earth Observation sensor are analyzed.
Shunsuke Kamijo - One of the best experts on this subject based on the ideXlab platform.
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how far should self driving cars see effect of Observation Range on vehicle self localization
International Conference on Intelligent Transportation Systems, 2019Co-Authors: Mahdi Javanmardi, Ehsan Javanmardi, Shunsuke KamijoAbstract:Accuracy and time efficiency are two essential requirements for the self-localization of autonomous vehicles. While the Observation Range considered for simultaneous localization and mapping (SLAM) has a significant effect on both accuracy and computation time, its effect is not well investigated in the literature. In this paper, we will answer the question "How far should a driverless car observe during selflocalization?" We introduce a framework to dynamically define the Observation Range for localization to meet the accuracy requirement for autonomous driving, while keeping the computation time low. To model the effect of scanning Range on the localization accuracy for every point on the map, several map factors were employed. The capability of the proposed framework was verified using field data, demonstrating that it is able to improve the average matching time from 142.2 ms to 39.3 ms while keeping the localization accuracy around 8.1 cm.
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ITSC - How Far Should Self-Driving Cars ‘See’? Effect of Observation Range on Vehicle Self-Localization
2019 IEEE Intelligent Transportation Systems Conference (ITSC), 2019Co-Authors: Javanmardi, Ehsan Javanmardi, Shunsuke KamijoAbstract:Accuracy and time efficiency are two essential requirements for the self-localization of autonomous vehicles. While the Observation Range considered for simultaneous localization and mapping (SLAM) has a significant effect on both accuracy and computation time, its effect is not well investigated in the literature. In this paper, we will answer the question "How far should a driverless car observe during selflocalization?" We introduce a framework to dynamically define the Observation Range for localization to meet the accuracy requirement for autonomous driving, while keeping the computation time low. To model the effect of scanning Range on the localization accuracy for every point on the map, several map factors were employed. The capability of the proposed framework was verified using field data, demonstrating that it is able to improve the average matching time from 142.2 ms to 39.3 ms while keeping the localization accuracy around 8.1 cm.
