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Geo-positioning accuracy analysis of GF-4 satellite imagery |
Jie HAN1, Zui TAO2(), Huina LI3, Baoliang MIAO4, Hongbin SHI1, Qiyue LIU2 |
1. School of Urban and Rural Planning and Landscape Architecture, Xuchang University, Xuchang 461000, China 2. Institute of Remote Sensing and Digital Earth, Chinese Academy of Sciences, Beijing 100094, China 3. School of Electric (Electromechanical) Engineering, Xuchang University, Xuchang 461000,China 4. 96608 Troops of PLA, Luoyang 471000, China |
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Abstract The geo-positioning accuracy is an important parameter in evaluating the geometric quality of the satellite imagery. In this paper, integrating the stationary orbit and area-array image characteristics of GF-4 satellite and taking Google Earth images as geometric references, the authors analyzed the geo-positioning accuracies of multispectral camera images during and after the commissioning phase period. This study was concentrated on the relationships between the image geo-positioning accuracy and the sun azimuth angle, the sun altitude angle, the satellite azimuth angle, the satellite zenith angle, and the satellite attitude angle. Meanwhile, the influence of satellite attitude angle and imaging time on the compensation of camera’s attitude constant angle errors was discussed. The results can be used to improve the imaging model and hence are useful for the high accuracy geo-positioning of this type satellite imagery.
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Keywords
GF-4
geo-positioning accuracy
errors analysis
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Corresponding Authors:
Zui TAO
E-mail: taozui@radi.ac.cn
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Issue Date: 30 August 2019
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