The Experts below are selected from a list of 56565 Experts worldwide ranked by ideXlab platform

Guo Zhang - One of the best experts on this subject based on the ideXlab platform.

  • multi mode gf 3 satellite image Geometric Accuracy verification using the rpc model
    Sensors, 2017
    Co-Authors: Taoyang Wang, Guo Zhang, Ruishan Zhao, Mingjun Deng
    Abstract:

    The GaoFen-3 (GF-3) satellite is the first C-band multi-polarization synthetic aperture radar (SAR) imaging satellite with a resolution up to 1 m in China. It is also the only SAR satellite of the High-Resolution Earth Observation System designed for civilian use. There are 12 different imaging models to meet the needs of different industry users. However, to use SAR satellite images for related applications, they must possess high Geometric Accuracy. In order to verify the Geometric Accuracy achieved by the different modes of GF-3 images, we analyze the SAR Geometric error source and perform Geometric correction tests based on the RPC model with and without ground control points (GCPs) for five imaging modes. These include the spotlight (SL), ultra-fine strip (UFS), Fine Strip I (FSI), Full polarized Strip I (QPSI), and standard strip (SS) modes. Experimental results show that the check point residuals are large and consistent without GCPs, but the root mean square error of the independent checkpoints for the case of four corner control points is better than 1.5 pixels, achieving a similar level of Geometric positioning Accuracy to that of international satellites. We conclude that the GF-3 satellite can be used for high-Accuracy Geometric processing and related industry applications.

  • verification of zy 3 satellite imagery Geometric Accuracy without ground control points
    IEEE Geoscience and Remote Sensing Letters, 2015
    Co-Authors: Xinming Tang, Guo Zhang, Yonghua Jiang, Ping Zhou, Xia Wang, Li Guo, Shuhan Liu
    Abstract:

    The Ziyuan-3 (ZY-3) satellite was designed to satisfy 1:50000 scale mapping requirements. This study uses 556 images obtained by ZY-3, from June 1 to October 31, 2013, covering an area of 3 500 000 km 2 in midwestern China. A total of 900 check points measured by a global positioning system were also used to conduct the planar Accuracy verification. The experimental results show that the ZY-3 nadir sensor calibration images achieved a planar root mean square error (RMSE) of 10.8 m without the use of ground control points (GCPs). In addition, the verification of vertical Accuracy employed 12 ZY-3 stereo image pairs distributed over an area of 14 000 km 2 around Taiyuan in the Shanxi Province of China, and a Digital Elevation Model with 0.5-m vertical Accuracy was used for reference and validation. The vertical Accuracy of forward interaction and stereo-extracted Digital Surface Model (DSM) from the stereo images were both validated without GCPs. The experimental results demonstrate that the overall vertical RMSE of the forward intersection was 6.58 m; it was 5.21 and 7.07 m for flat and mountainous terrain, respectively. Moreover, the overall vertical RMSE of DSM was 5.56 m; it was 4.37 and 5.69 m for flat and mountainous terrain, respectively. It can be seen from the experimental results of planar and vertical Accuracy verification that ZY-3 imagery is able to satisfy the requirements of 1:50000 topographic mapping in China without using GCPs.

  • Geometric Accuracy validation for zy 3 satellite imagery
    IEEE Geoscience and Remote Sensing Letters, 2014
    Co-Authors: Taoyang Wang, Guo Zhang, Xinming Tang, Yonghua Jiang, Hongbo Pan, Xiaoyong Zhu, Chen Fang
    Abstract:

    The ZiYuan-3 surveying satellite (ZY-3) is a high-precision civilian satellite imaging sensor. Since its launch on January 9, 2012, it has been in operation for one and a half years. Although the initial postlaunch ZY-3 Geometric Accuracy was verified during an in-orbit operation period, on-orbit calibration was still necessary from time to time. This on-orbit calibration has vastly improved the location Accuracy in planimetry for ZY-3 panchromatic images. This letter briefly describes the principle of on-orbit calibration and production processes of sensor-corrected products. Furthermore, block adjustment based on a rational function model test showed planimetric and vertical Accuracy values of 10 m and 5 m, respectively, without ground control points (GCPs). The Accuracy values improved to 3 m and 2 m, respectively, with a few GCPs. The statistics results are from ten different regions with independent checkpoints (ICPs). All Accuracy values are the root-mean-square error of ICPs. Therefore, ZY-3 can be used for the generation of cartographic maps at the 1 : 50 000 scale and for revision and updates of 1 : 25 000 scale maps. Compared with other mainstream high-resolution satellite images of the same ground resolution, ZY-3's Geometric Accuracy is almost the same and sometimes even better.

  • the Geometric Accuracy validation of the zy 3 mapping satellite
    ISPRS - International Archives of the Photogrammetry Remote Sensing and Spatial Information Sciences, 2013
    Co-Authors: Xiaoming Gao, Guo Zhang, Xinming Tang, Xiaoyong Zhu
    Abstract:

    ZiYuan-3 (ZY-3) mapping satellite is the first civilian high-resolution stereo mapping satellite of China. The satellite’s objective is oriented towards plotting 1:50,000 and 1:25,000 topographic maps. This article proposes ZY-3 mapping satellite Rigorous Image Geometry Model and Rational Function Model (RFM). In addition, this paper utilizes the image of the ZY-3 satellite with the region of flatlands, hills and mountains for the block adjustment experiment. Different ground control points are selected and the Accuracy is validated by check points, and the some Digital Surface Model (DSM), Digital Orthophoto Map (DOM) are generated and the Accuracy is also validated by check points. The experiment reveals that the planar Accuracy of DOM and vertical Accuracy of DSM are better than 3m and 2 m, respectively. The experiment demonstrates the effectiveness of ZY-3 mapping satellite image geometry model.

Xinming Tang - One of the best experts on this subject based on the ideXlab platform.

  • verification of zy 3 satellite imagery Geometric Accuracy without ground control points
    IEEE Geoscience and Remote Sensing Letters, 2015
    Co-Authors: Xinming Tang, Guo Zhang, Yonghua Jiang, Ping Zhou, Xia Wang, Li Guo, Shuhan Liu
    Abstract:

    The Ziyuan-3 (ZY-3) satellite was designed to satisfy 1:50000 scale mapping requirements. This study uses 556 images obtained by ZY-3, from June 1 to October 31, 2013, covering an area of 3 500 000 km 2 in midwestern China. A total of 900 check points measured by a global positioning system were also used to conduct the planar Accuracy verification. The experimental results show that the ZY-3 nadir sensor calibration images achieved a planar root mean square error (RMSE) of 10.8 m without the use of ground control points (GCPs). In addition, the verification of vertical Accuracy employed 12 ZY-3 stereo image pairs distributed over an area of 14 000 km 2 around Taiyuan in the Shanxi Province of China, and a Digital Elevation Model with 0.5-m vertical Accuracy was used for reference and validation. The vertical Accuracy of forward interaction and stereo-extracted Digital Surface Model (DSM) from the stereo images were both validated without GCPs. The experimental results demonstrate that the overall vertical RMSE of the forward intersection was 6.58 m; it was 5.21 and 7.07 m for flat and mountainous terrain, respectively. Moreover, the overall vertical RMSE of DSM was 5.56 m; it was 4.37 and 5.69 m for flat and mountainous terrain, respectively. It can be seen from the experimental results of planar and vertical Accuracy verification that ZY-3 imagery is able to satisfy the requirements of 1:50000 topographic mapping in China without using GCPs.

  • Geometric Accuracy validation for zy 3 satellite imagery
    IEEE Geoscience and Remote Sensing Letters, 2014
    Co-Authors: Taoyang Wang, Guo Zhang, Xinming Tang, Yonghua Jiang, Hongbo Pan, Xiaoyong Zhu, Chen Fang
    Abstract:

    The ZiYuan-3 surveying satellite (ZY-3) is a high-precision civilian satellite imaging sensor. Since its launch on January 9, 2012, it has been in operation for one and a half years. Although the initial postlaunch ZY-3 Geometric Accuracy was verified during an in-orbit operation period, on-orbit calibration was still necessary from time to time. This on-orbit calibration has vastly improved the location Accuracy in planimetry for ZY-3 panchromatic images. This letter briefly describes the principle of on-orbit calibration and production processes of sensor-corrected products. Furthermore, block adjustment based on a rational function model test showed planimetric and vertical Accuracy values of 10 m and 5 m, respectively, without ground control points (GCPs). The Accuracy values improved to 3 m and 2 m, respectively, with a few GCPs. The statistics results are from ten different regions with independent checkpoints (ICPs). All Accuracy values are the root-mean-square error of ICPs. Therefore, ZY-3 can be used for the generation of cartographic maps at the 1 : 50 000 scale and for revision and updates of 1 : 25 000 scale maps. Compared with other mainstream high-resolution satellite images of the same ground resolution, ZY-3's Geometric Accuracy is almost the same and sometimes even better.

  • the Geometric Accuracy validation of the zy 3 mapping satellite
    ISPRS - International Archives of the Photogrammetry Remote Sensing and Spatial Information Sciences, 2013
    Co-Authors: Xiaoming Gao, Guo Zhang, Xinming Tang, Xiaoyong Zhu
    Abstract:

    ZiYuan-3 (ZY-3) mapping satellite is the first civilian high-resolution stereo mapping satellite of China. The satellite’s objective is oriented towards plotting 1:50,000 and 1:25,000 topographic maps. This article proposes ZY-3 mapping satellite Rigorous Image Geometry Model and Rational Function Model (RFM). In addition, this paper utilizes the image of the ZY-3 satellite with the region of flatlands, hills and mountains for the block adjustment experiment. Different ground control points are selected and the Accuracy is validated by check points, and the some Digital Surface Model (DSM), Digital Orthophoto Map (DOM) are generated and the Accuracy is also validated by check points. The experiment reveals that the planar Accuracy of DOM and vertical Accuracy of DSM are better than 3m and 2 m, respectively. The experiment demonstrates the effectiveness of ZY-3 mapping satellite image geometry model.

Taoyang Wang - One of the best experts on this subject based on the ideXlab platform.

  • multi mode gf 3 satellite image Geometric Accuracy verification using the rpc model
    Sensors, 2017
    Co-Authors: Taoyang Wang, Guo Zhang, Ruishan Zhao, Mingjun Deng
    Abstract:

    The GaoFen-3 (GF-3) satellite is the first C-band multi-polarization synthetic aperture radar (SAR) imaging satellite with a resolution up to 1 m in China. It is also the only SAR satellite of the High-Resolution Earth Observation System designed for civilian use. There are 12 different imaging models to meet the needs of different industry users. However, to use SAR satellite images for related applications, they must possess high Geometric Accuracy. In order to verify the Geometric Accuracy achieved by the different modes of GF-3 images, we analyze the SAR Geometric error source and perform Geometric correction tests based on the RPC model with and without ground control points (GCPs) for five imaging modes. These include the spotlight (SL), ultra-fine strip (UFS), Fine Strip I (FSI), Full polarized Strip I (QPSI), and standard strip (SS) modes. Experimental results show that the check point residuals are large and consistent without GCPs, but the root mean square error of the independent checkpoints for the case of four corner control points is better than 1.5 pixels, achieving a similar level of Geometric positioning Accuracy to that of international satellites. We conclude that the GF-3 satellite can be used for high-Accuracy Geometric processing and related industry applications.

  • Geometric Accuracy validation for zy 3 satellite imagery
    IEEE Geoscience and Remote Sensing Letters, 2014
    Co-Authors: Taoyang Wang, Guo Zhang, Xinming Tang, Yonghua Jiang, Hongbo Pan, Xiaoyong Zhu, Chen Fang
    Abstract:

    The ZiYuan-3 surveying satellite (ZY-3) is a high-precision civilian satellite imaging sensor. Since its launch on January 9, 2012, it has been in operation for one and a half years. Although the initial postlaunch ZY-3 Geometric Accuracy was verified during an in-orbit operation period, on-orbit calibration was still necessary from time to time. This on-orbit calibration has vastly improved the location Accuracy in planimetry for ZY-3 panchromatic images. This letter briefly describes the principle of on-orbit calibration and production processes of sensor-corrected products. Furthermore, block adjustment based on a rational function model test showed planimetric and vertical Accuracy values of 10 m and 5 m, respectively, without ground control points (GCPs). The Accuracy values improved to 3 m and 2 m, respectively, with a few GCPs. The statistics results are from ten different regions with independent checkpoints (ICPs). All Accuracy values are the root-mean-square error of ICPs. Therefore, ZY-3 can be used for the generation of cartographic maps at the 1 : 50 000 scale and for revision and updates of 1 : 25 000 scale maps. Compared with other mainstream high-resolution satellite images of the same ground resolution, ZY-3's Geometric Accuracy is almost the same and sometimes even better.

Yonghua Jiang - One of the best experts on this subject based on the ideXlab platform.

  • verification of zy 3 satellite imagery Geometric Accuracy without ground control points
    IEEE Geoscience and Remote Sensing Letters, 2015
    Co-Authors: Xinming Tang, Guo Zhang, Yonghua Jiang, Ping Zhou, Xia Wang, Li Guo, Shuhan Liu
    Abstract:

    The Ziyuan-3 (ZY-3) satellite was designed to satisfy 1:50000 scale mapping requirements. This study uses 556 images obtained by ZY-3, from June 1 to October 31, 2013, covering an area of 3 500 000 km 2 in midwestern China. A total of 900 check points measured by a global positioning system were also used to conduct the planar Accuracy verification. The experimental results show that the ZY-3 nadir sensor calibration images achieved a planar root mean square error (RMSE) of 10.8 m without the use of ground control points (GCPs). In addition, the verification of vertical Accuracy employed 12 ZY-3 stereo image pairs distributed over an area of 14 000 km 2 around Taiyuan in the Shanxi Province of China, and a Digital Elevation Model with 0.5-m vertical Accuracy was used for reference and validation. The vertical Accuracy of forward interaction and stereo-extracted Digital Surface Model (DSM) from the stereo images were both validated without GCPs. The experimental results demonstrate that the overall vertical RMSE of the forward intersection was 6.58 m; it was 5.21 and 7.07 m for flat and mountainous terrain, respectively. Moreover, the overall vertical RMSE of DSM was 5.56 m; it was 4.37 and 5.69 m for flat and mountainous terrain, respectively. It can be seen from the experimental results of planar and vertical Accuracy verification that ZY-3 imagery is able to satisfy the requirements of 1:50000 topographic mapping in China without using GCPs.

  • Geometric Accuracy validation for zy 3 satellite imagery
    IEEE Geoscience and Remote Sensing Letters, 2014
    Co-Authors: Taoyang Wang, Guo Zhang, Xinming Tang, Yonghua Jiang, Hongbo Pan, Xiaoyong Zhu, Chen Fang
    Abstract:

    The ZiYuan-3 surveying satellite (ZY-3) is a high-precision civilian satellite imaging sensor. Since its launch on January 9, 2012, it has been in operation for one and a half years. Although the initial postlaunch ZY-3 Geometric Accuracy was verified during an in-orbit operation period, on-orbit calibration was still necessary from time to time. This on-orbit calibration has vastly improved the location Accuracy in planimetry for ZY-3 panchromatic images. This letter briefly describes the principle of on-orbit calibration and production processes of sensor-corrected products. Furthermore, block adjustment based on a rational function model test showed planimetric and vertical Accuracy values of 10 m and 5 m, respectively, without ground control points (GCPs). The Accuracy values improved to 3 m and 2 m, respectively, with a few GCPs. The statistics results are from ten different regions with independent checkpoints (ICPs). All Accuracy values are the root-mean-square error of ICPs. Therefore, ZY-3 can be used for the generation of cartographic maps at the 1 : 50 000 scale and for revision and updates of 1 : 25 000 scale maps. Compared with other mainstream high-resolution satellite images of the same ground resolution, ZY-3's Geometric Accuracy is almost the same and sometimes even better.

Shuhan Liu - One of the best experts on this subject based on the ideXlab platform.

  • verification of zy 3 satellite imagery Geometric Accuracy without ground control points
    IEEE Geoscience and Remote Sensing Letters, 2015
    Co-Authors: Xinming Tang, Guo Zhang, Yonghua Jiang, Ping Zhou, Xia Wang, Li Guo, Shuhan Liu
    Abstract:

    The Ziyuan-3 (ZY-3) satellite was designed to satisfy 1:50000 scale mapping requirements. This study uses 556 images obtained by ZY-3, from June 1 to October 31, 2013, covering an area of 3 500 000 km 2 in midwestern China. A total of 900 check points measured by a global positioning system were also used to conduct the planar Accuracy verification. The experimental results show that the ZY-3 nadir sensor calibration images achieved a planar root mean square error (RMSE) of 10.8 m without the use of ground control points (GCPs). In addition, the verification of vertical Accuracy employed 12 ZY-3 stereo image pairs distributed over an area of 14 000 km 2 around Taiyuan in the Shanxi Province of China, and a Digital Elevation Model with 0.5-m vertical Accuracy was used for reference and validation. The vertical Accuracy of forward interaction and stereo-extracted Digital Surface Model (DSM) from the stereo images were both validated without GCPs. The experimental results demonstrate that the overall vertical RMSE of the forward intersection was 6.58 m; it was 5.21 and 7.07 m for flat and mountainous terrain, respectively. Moreover, the overall vertical RMSE of DSM was 5.56 m; it was 4.37 and 5.69 m for flat and mountainous terrain, respectively. It can be seen from the experimental results of planar and vertical Accuracy verification that ZY-3 imagery is able to satisfy the requirements of 1:50000 topographic mapping in China without using GCPs.