HJ-1B热红外波段在轨绝对辐射定标

韩启金; 闵祥军; 傅俏燕

doi:10.11834/jrs.20100611

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HJ-1B热红外波段在轨绝对辐射定标
In-flight absolute radiometric calibration for thermal infrared band of HJ-1B
2010年14卷第6期页码：1212-1225
纸质出版：2010
DOI： 10.11834/jrs.20100611
稿件说明：

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[1]韩启金,闵祥军,傅俏燕.HJ-1B热红外波段在轨绝对辐射定标[J].遥感学报,2010,14(06):1212-1225. DOI： 10.11834/jrs.20100611.

In-flight absolute radiometric calibration for thermal infrared band of HJ-1B[J]. Journal of Remote Sensing, 2010, 14(6): 1212-1225. DOI： 10.11834/jrs.20100611.

摘要

针对HJ-1B红外相机（IRS）热红外通道特点

利用青海湖辐射校正场进行HJ-1B热红外绝对辐射定标

提出新的场地定标算法

并通过实测数据和Landsat5-TM数据对不同定标系数进行真实性检验分析

发现该场地定标算法获得的系数比原始系数精度提高约0.6%—3%

总体精度为1K左右。研究结果表明文章提出的定标算法适用于不具备观测冷空间能力的卫星传感器在轨绝对辐射定标

得到的定标系数合理可靠。

Abstract

This paper presentes an in-flight site calibration method for thermal infrared band of HJ-1B

taking advantages of Lake Qinghai test-site for the absolute radiometric calibration for thermal infrared band of HJ-1B.By using measurement data and landsat5-TM to analyze the different results between site calibration and primeval calibration

it shows that the accuracy of in-flight site calibration had been increased 0.6%—3% comparing with the primeval calibration result and the total accuracy is about 1K.Thus this new site calibration method is applicable to the in-flight absolute radiometric calibration of these sensors without the capability of detecting cold space.By the way

the accuracy of calibration for thermal infrared of HJ-1B can meet user’s requirements for the application of quantitative thermal infrared data.