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| HJ-1B B08 在轨星上定标有效波段宽度计算的查找表法 | |
| 引用本文： | 李家国,顾行发,余涛,韩启金,郭宏,王苏颖. HJ-1B B08 在轨星上定标有效波段宽度计算的查找表法[J]. 遥感学报, 2011, 15(1): 60-72 |
| 作者姓名： | 李家国 顾行发 余涛 韩启金 郭宏 王苏颖 |
| 作者单位： | 1. 中国科学院,遥感应用研究所,北京,100101;中国科学院,研究生院,北京,100049 2. 中国资源卫星应用中心,北京,100094 3. 河南理工大学,测绘学院,河南,焦作,454003 4. 福建师范大学,地科学院,福建,福州,350007 |
| 基金项目： | 国家科技部中澳合作项目“中澳遥感定标与真值性检验联合研究计划”(编号: 2008DFA21540); 国防科技工业民用专项科研技术研究项目: HJ-1 卫星数据应用研究(编号: 07K00100KJ) |
| 摘 要： | 通过构建适用于HJ-1B 热红外通道(IRSB08)特性的有效波段宽度计算方法, 提高HJ-1B B08 在轨星上绝对辐射定标的精度。根据HJ-1B 星上定标原理、利用卫星发射前地面实验数据和Planck 方程, 建立基于定标黑体温度的有效波段宽度计算的查找表法, 结果表明查找表法得到的有效波段宽度为2.01 ?m 左右, 介于半高宽法1.940 ?m 和矩方法2.394 ?m 之间, 且与定标黑体温度的关联性很小, 在低温点和高温点之间的相对差异在0.3%以内。半高宽法和矩方法分别低估和高估有效 |
| 关 键 词： | HJ-1B IRS 定标 有效波段宽度 查找表法 |
| 收稿时间： | 2010-03-15 |
| 修稿时间： | 2010-04-21 |
Lookup table method of effective bandwidth for HJ-1B B08on-board radiometric calibration |
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| LI Jiaguo,GU Xingf,YU Tao,HAN Qijin,GUO Hong and WANG Suying. Lookup table method of effective bandwidth for HJ-1B B08on-board radiometric calibration[J]. Journal of Remote Sensing, 2011, 15(1): 60-72 | |
| Authors: | LI Jiaguo GU Xingf YU Tao HAN Qijin GUO Hong WANG Suying |
| Affiliation: | Institute of Remote Sensing Applications, Chinese Academy of Science, Beijing 100101, China;Graduate School of Chinese Academy of Sciences, Beijing 100049, China;Institute of Remote Sensing Applications, Chinese Academy of Science, Beijing 100101, China;Graduate School of Chinese Academy of Sciences, Beijing 100049, China;Institute of Remote Sensing Applications, Chinese Academy of Science, Beijing 100101, China;Graduate School of Chinese Academy of Sciences, Beijing 100049, China;China Center for Resources Satellite Date & Application, Beijing 100094, China;Institute of Surveying and Mapping, Henan Polytechnic University, Henan Jiaozuo 454003, China;Fujian Normal University, College of Geographical Sciences, Fujian Fuzhou 350007, China |
| Abstract: | Improve HJ-1B B08 on-board absolutely radiometric calibration precision by virtue of a constructed lookup table(LUT) method that fit for HJ-1B B08 characteristic to calculate its effective bandwidth. LUT method is based on HJ-1Bon-board radiometric calibration theory, pre-launched experiment datum and Planck formula. As a result, HJ-1B B08 effectivebandwidths are 2.01 ?m, 1.940 ?m and 2.394 ?m corresponding to LUT method, FWHM method and moments method (MM).LUT method has low association to blackbody temperature, and the relative difference is 0.3% between normal temperature andhigh temperature state. FWHM method and MM method are either higher or lower, and the calibrated top of atmospheric (TOA)radiance is either lower or higher, so they are not fit for HJ-1B B08 characteristic. LUT method gives a result that very close tofield experiment, and the absolutely error is 0.04 W·m?2·sr?1·?m?1corresponding to approximately 0.4 K TOA radiant temperatureerror, so it can be better when used to HJ-1B B08 on-board absolutely radiometric calibration. |
| Keywords: | remote sensing thermal infrared HJ-1 calibration effective bandwidth |
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