| HJ-1B卫星红外多光谱相机星上定标精度分析 |
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| 引用本文： | 韩启金,闵祥军,傅俏燕,孙珂,王爱春. HJ-1B卫星红外多光谱相机星上定标精度分析[J]. 航天返回与遥感, 2010, 31(3): 41-47 |
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| 作者姓名： | 韩启金 闵祥军 傅俏燕 孙珂 王爱春 |
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| 作者单位： | 1. 中国资源卫星应用中心,北京,100094;中国空间技术研究院,北京,100081
2. 中国资源卫星应用中心,北京,100094 |
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| 基金项目： | 国家重大科技专项工程 |
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| 摘 要： | 介绍了"环境一号"B(HJ-1B)卫星红外多光谱相机在轨辐射定标的目的以及星上定标的原理,分析了星上定标算法的精度。利用星上零级数据对星上定标系统的测控精度和工作稳定性进行研究,并在此基础上分析了定标数据的处理精度。HJ-1B卫星发射以来共对红外相机热红外通道进行了7次星上定标,为了监测定标系统的精度变化,文章利用MODIS-31、32通道辐亮度对HJ-1B卫星上定标系统精度进行检验,考虑MODIS传感器本身定标的不确定度恒定,分析结果表明自HJ-1B卫星发射以来星上定标系统相对精度发生了衰减。
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| 关 键 词： | 星上定标 系统精度 红外多光谱相机 “环境一号”B卫星 |
Analysis of Onboard Calibration Accuracy of HJ-1B Infrared Multispectral Camera |
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| Han Qijin,Min Xiangjun,Fu Qiaoyan,Sun Ke,Wang Aichun. Analysis of Onboard Calibration Accuracy of HJ-1B Infrared Multispectral Camera[J]. Spacecraft Recovery & Remote Sensing, 2010, 31(3): 41-47 |
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| Authors: | Han Qijin Min Xiangjun Fu Qiaoyan Sun Ke Wang Aichun |
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| Affiliation: | 1 China Center for Resources Satellite Date and Application,Beijing 100094,China)(2 China Academy of Space Technology,Beijing 100081,China) |
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| Abstract: | The aim of onboard radiometric calibration and the principle of onboard calibration system of HJ-1B infrared camera are introduced,and then the accuracy of onboard calibration method are analyzed.The accuracy and stability of onboard calibration system with a vast amount of onboard Level 0 data are researched.Furthermore,The accuracy of data processing are analyzed.Seven times onboard calibration of HJ-1B infrared camera had been accomplished, in order to verify the accuracy degradation of calibration system.The accuracy of onboard calibration of HJ-1B with MODIS-31,32 channel radiance is validated.The uncertainty of calibration for MODIS was invariablenes,the analysis result showed that the relative precision of onboard calibration system had degradation since HJ-1B was launched. |
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| Keywords: | Onboard calibration System accuracy Infrared multispectral camera HJ-1B |
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