大气与环境光学学报 ›› 2014, Vol. 9 ›› Issue (1): 50-56.

• “光学遥感定标技术及应用”专辑 • 上一篇    下一篇

HJ-1B热红外通道探元级星上辐射定标方法研究

刘李1, 韩启金1, 史婷婷2, 王爱春1, 张学文1   

  1. (1中国资源卫星应用中心, 北京 100094; 
    2中国科学院地理科学与资源研究所, 北京 100101)
  • 收稿日期:2013-10-28 修回日期:2013-11-26 出版日期:2014-01-28 发布日期:2014-01-09
  • 通讯作者: 刘李 (1984-),男,河北保定人,博士,主要从事传感器辐射定标及验证方面的研究。 E-mail:liulicugb@126.com
  • 作者简介:刘李 (1984-),男,河北保定人,博士,主要从事传感器辐射定标及验证方面的研究。
  • 基金资助:

    国家高技术研究发展计划(“863”计划)项目(2012AA12A302)资助

Onboard Radiometric Calibration Method for HJ-1B Satellite Thermal Infrared Channel’s Each Detector

LIU Li1, HAN Qi-jin1, SHI Ting-ting2, WANG Ai-chun1, ZHANG Xue-wen1   

  1. (1 China Center for Resources Satellite Date and Application, Beijing 100094, China; 
    2 Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing 100101, China)
  • Received:2013-10-28 Revised:2013-11-26 Published:2014-01-28 Online:2014-01-09

摘要:

HJ-1B热红外通道在轨星上定标精度直接影响着后续遥感数据的定量化应用。以往针对整个通道的星上辐射定标忽视了各个探元的响应差异问题。使用查找表法、半高宽法和矩方法,分别对2009年9月14日星上下传的黑体数据进行处理,得到HJ-1B热红外通道探元级辐射定标结果。分析结果,红外相机热红外通道各探元扫描校正黑体时存在2个DN左右的波动,引入误差约0.28%~0.45%。其中,探元9和10相对其他探元波动范围较大。

关键词: 辐射定标, 探元, 热红外

Abstract:

Onboard calibration accuracy of HJ-1B Satellite thermal infrared channel directly affects the quantitative application of remote sensing data. The response differences of each detector were ignored by the previous onboard calibration methods which focused on the whole channel. The look-up table, half-width and moments methods are used to calculate each detector's calibration coefficients of HJ-1B thermal infrared channel based on the blackbody data transferred on Sep. 14th, 2009. The results show that the deviation is about 2 DN when the detectors scanning the adaptive blackbody, which bring errors from 0.28% to 0.45%. The 9th and 10th detectors have larger deviation than the others.

Key words: radiometric calibration, each detector, thermal infrared

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