第 35 卷 第 2 期
2015 年 2 月
Vol. 35, No. 2
February, 2015
光 学 学 报
ACTA OPTICA SINICA
0212004-
空间污染条件下红外测量相机响应衰减模型的
建立与应用
张 寅 丛明煜 周宇星
哈尔滨工业大学空间光学工程研究中心, 黑龙江 哈尔滨 150001
摘要 基于某型号大气辐射测量卫星 在轨定 标实验数据,开展了空间污染物对天基红外 测量相 机响应性能的影响
研究 。建立了具 有明确物理 意义的测量 相机灰度响 应衰减模型 ,使用实 测数据对模 型参数进行 了拟合,拟合相对
均方根误差小于 1%,参数值与其物理意义吻合较好;提出了基于相机线性响应范围与最小辐射分辨率要求双重约
束下 的 空间污染容 限确定准则 ,得出了 推荐去污间 隔时间为 1250 h 的结论;给出了利用 衰减模型预 估 任意时刻定
标系数的方法,分别利用模型预估定标系数、历史定标系数以及当轨定标系数对测量灰度数据进行了辐射标定,预
估定标系数的标定误差小于 3%,能够在保证像面质量的同时提高测量精度。
关键词 遥感;相机响应衰减模型;在轨辐射定标;空间污染物;污染容限
中图分类号 V445.8 文献标识码 A
doi: 10.3788/AOS201535.0212004
Establishment and Application of Infrared Camera Response
Attenuation Model due to Contamination in Satellite
Zhang Yin Cong Mingyu Zhou Yuxing
Research Center for Space Optical Engineering, Harbin Institute of Technology, Harbin, Heilongjiang 150001, China
Abstract On- orbit radiometric calibration data from some types of atmospheric radiation measurement
satellite are analyzed to investigate the impact of pollutants on the response performance of space- based
infrared camera. An attenuation model of camera responded grayscale is established with a clear physical
meaning, whose parameters are fitted using the practical data with the relative root mean square errors less
than 1% , and the fitted values coincide with their physical meanings well. In order to determine the pollution
tolerance in satellite, rules based on the constraints of camera linear response range and the minimum
radiance resolution requirements are proposed, and the recommended decontamination interval of 1250 h is
obtained. The method of using the attenuation model to predict calibration coefficients at any moment is
presented, and calibration coefficients from model prediction, history calibration tests and the time- matched
calibration test are used to convert measuring grayscale data to radiance. Results show that the model-
predicted coefficients can control the calibration errors with less than 3% and are able to improve the
measurement accuracy while ensuring image quality.
Key words remote sensing; attenuation model of camera response; on-orbit radiometric calibration; pollutants
in satellite; pollution tolerance
OCIS codes 120.0280; 110.3080; 150.1488
收稿日期: 2014-07-17; 收到修改稿日期: 2014-09-11
基金项目: 总装备部预研基金(z/07-85-0639-2012)
作者简介: 张 寅(1986—),男,博士研究生,主要从事空间光学信息处理与战略场景成像仿真技术方面的研究。
E-mail: hitzhangyin@gmail.com
导师简介: 丛明煜(1964—),男,博士,教授,主要从事空间光学工程方面的研究。E-mail: mycong@hit.edu.cn
1 引 言
光学遥感卫星在轨运行一段时间后,受空间污染物的影响,成像质量会有 一定程度下降
[1-4]
。我国于 20
1