| 利用敦煌辐射校正场对FY-2B静止气象卫星进行可见光通道的在轨辐射定标 |
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| 引用本文： | 戎志国,张玉香,邱康睦,胡秀清,张立军.利用敦煌辐射校正场对FY-2B静止气象卫星进行可见光通道的在轨辐射定标[J].应用气象学报,2004,15(3):266-272. |
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| 作者姓名： | 戎志国 张玉香 邱康睦 胡秀清 张立军 |
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| 作者单位： | 国家卫星气象中心, 北京 100081 |
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| 摘 要： | FY-2B由于杂散光的影响，其可见光通道的发射前定标存在较大误差。利用敦煌戈壁滩辐射校正场可进行FY-2B可见光通道的在轨绝对定标。由于FY-2B对于敦煌场区的卫星天顶角接近50°，需要进行场地的方向特性BRDF修正。2002年7月对FY-2B进行了场地地表反射率、大气消光、探空等项同步测量，并对场地的方向特性进行了测量。资料处理结果表明，FY-2B可见光通道杂散光可影响定标精度达20%。长期监视表明FY-2B可见光通道探测器输出十分稳定。该文将4个可见光通道探测器场地定标得出的定标查找表列出，供用户参考使用。
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| 关 键 词： | FY-2B 杂散光 发射前定标 校正场 在轨辐射定标 方向特性 |
| 收稿时间： | 2003-01-12 |
| 修稿时间： | 2003年1月12日 |
RADIOMETRIC CALIBRATION ON ORBIT FOR FY-2B METEOROLOGICAL SATELLITE'S VISIBLE CHANNELS WITH THE RADIOMETRIC CALIBRATION SITE OF DUNHUANG |
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| Rong Zhiguo,Zhang Yuxiang,Qiu Kangmu,Hu Xiuqing,Zhang Lijun.RADIOMETRIC CALIBRATION ON ORBIT FOR FY-2B METEOROLOGICAL SATELLITE''''S VISIBLE CHANNELS WITH THE RADIOMETRIC CALIBRATION SITE OF DUNHUANG[J].Quarterly Journal of Applied Meteorology,2004,15(3):266-272. |
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| Authors: | Rong Zhiguo Zhang Yuxiang Qiu Kangmu Hu Xiuqing Zhang Lijun |
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| Institution: | National Satellite Meteorology Center, Beijing 100081 |
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| Abstract: | Pre-launch calibration of the FY-2B's visible channels has much error due to the influence of stray light. The radiometric calibration on orbit for FY-2B's visible channels might be running with the radiometric calibration site of Dunhuang's Gobi. There are must calibrated the BRDF of bi-direction characteristic of Dunhuang's site, because the zenith is close to 50°. The reflectance of the Gobi, light extinction of atmosphere and radiosonde observation were measured in synchronization for FY-2B in July 2002, while the bi-direction characteristics of the site were measured. The data processed results indicate that the calibration precision are debased 20% due to influence of stray light for FY-2B's visible channels, and the output of FY-2B's visible channels is very stabilization after long stakeout. The calibration tables calibrated by the site of four visible channels were listed. |
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| Keywords: | FY-2B Stray light Radiometric calibration on orbit Visible channel BRDF |
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