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。
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.
出处
《大气与环境光学学报》
CAS
2014年第1期50-56,共7页
Journal of Atmospheric and Environmental Optics
基金
国家高技术研究发展计划("863"计划)项目(2012AA12A302)资助
关键词
辐射定标
探元
热红外
radiometric calibration
each detector
thermal infrared
