| 双星敏感器在轨相对热变形分析及修正 |
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| 引用本文： | 钟金凤,郭思岩,吴敬玉,裴甲瑞,贾艳胜.双星敏感器在轨相对热变形分析及修正[J].遥感学报,2018,22(2):197-202. |
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| 作者姓名： | 钟金凤 郭思岩 吴敬玉 裴甲瑞 贾艳胜 |
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| 作者单位： | 上海航天控制技术研究所上海市空间智能控制技术重点试验室; |
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| 基金项目： | 第四届高分青年基金项目（编号：GFZX04061502） |
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| 摘 要： | 为了获取高质量的对地观测遥感图像,除了有效载荷成像的高分辨率外,还需要卫星平台姿态具有高精度。在双星敏联合姿态确定时,星敏感器之间的相对热变形会对姿态确定带来不利影响,需对热变形误差进行辨识与修正。通过对某遥感卫星在轨遥测数据进行分析,建立了星敏感器在轨结构热变形模型,并对星敏感器热变形进行了在轨修正。采用辨识得到的傅里叶级数的热变形模型参数,对星敏热变形进行在轨修正后,提高了星敏感器的测量精度,减小了星敏感器之间的热变形误差对姿态确定精度的影响,对得到高质量的对地观测遥感图像具有很大的工程应用价值。
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| 关 键 词： | 遥感卫星 双星敏感器 热变形 在轨修正 测量精度 |
| 收稿时间： | 2017/7/20 0:00:00 |
Correction of the relative thermal deformation of dual star sensors for remote-sensing satellites |
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| ZHONG Jinfeng,GUO Siyan,WU Jingyu,PEI Jiarui and JIA Yansheng.Correction of the relative thermal deformation of dual star sensors for remote-sensing satellites[J].Journal of Remote Sensing,2018,22(2):197-202. |
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| Authors: | ZHONG Jinfeng GUO Siyan WU Jingyu PEI Jiarui and JIA Yansheng |
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| Institution: | Shanghai Institute of Spaceflight Control Technology, Shanghai Key Laboratory of Spacecraft Intelligent Control Technology, Shanghai 201109, China,Shanghai Institute of Spaceflight Control Technology, Shanghai Key Laboratory of Spacecraft Intelligent Control Technology, Shanghai 201109, China,Shanghai Institute of Spaceflight Control Technology, Shanghai Key Laboratory of Spacecraft Intelligent Control Technology, Shanghai 201109, China,Shanghai Institute of Spaceflight Control Technology, Shanghai Key Laboratory of Spacecraft Intelligent Control Technology, Shanghai 201109, China and Shanghai Institute of Spaceflight Control Technology, Shanghai Key Laboratory of Spacecraft Intelligent Control Technology, Shanghai 201109, China |
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| Abstract: | A high-accuracy satellite platform is required to obtain remote-sensing images that meet the requirements of high image quality and high resolution for payload imaging. In practical engineering applications, the thermal deformation error caused by the thermal environment of star sensors is always neglected. Therefore, relative thermal deformation between star sensors will negatively affect altitude determination by dual sensors. Thus, the thermal deformation error must be identified and corrected.In this study, the thermal deformation model is established on the basis of satellite remote-sensing data and then corrected. The parameters of the thermal deformation model established using the Fourier series reflect the real results of on-orbit thermal deformation, and the magnitudes of sinusoidal and cosine functions in the Fourier series are determined. Then, the estimated parameters are used to compensate for the output of star sensors.Comparing the altitude error of star sensors before and after correction revealed that measurement precision improved by 40% after correction. Results showed that the proposed method for thermal deformation correction can improve the measurement precision of star sensors and reduce the influence of slow-frequency error on the precisions of altitude determination. The proposed method has potential engineering applications for obtaining high-quality images. |
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| Keywords: | remote sensing satellite dual star sensors thermal deformation on-orbit correction measurement precision |
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