Landsat系列卫星光学遥感器辐射定标方法综述  

Review of radiometric calibration methods of Landsat series optical remote sensors

作　　者：张志杰[1,2] 张浩[2] 常玉光[1] 陈正超[2] 

机构地区：[1]河南理工大学测绘与国土信息工程学院,河南焦作454000 [2]中国科学院遥感与数字地球研究所数字地球科学重点实验室,北京100094

出　　处：《遥感学报》2015年第5期719-732,共14页NATIONAL REMOTE SENSING BULLETIN

基　　金：国家高技术研究发展计划(863计划)(编号:2012AA12A301;2013AA12A301)

摘　　要：Landsat系列卫星自1972发射以来,已经连续提供了40多年的中等分辨率多光谱遥感数据,广泛应用于农业、水资源管理、灾害响应等领域。目前,很多研究人员开始考虑利用这些数据开展中分辨率尺度的长时间序列地表定量信息监测,更加精细地反映局地甚至全球气候变化。开展这些研究的前提在于对数据进行辐射定标,并通过不同卫星的交叉辐射传递保证数据辐射精度的一致性。从Landsat 1到Landsat 8,随着遥感器性能和数据获取能力的提升,辐射定标方法不断更新,涉及发射前实验室定标、内定标灯方法、全孔径太阳定标器方法、交叉定标方法、场地定标方法等。本文在对Landsat系列卫星的遥感器性能进行分类、归纳、对比的基础上,系统梳理了Landsat系列卫星遥感器辐射定标方法发展过程以及不同定标方法的优缺点,特别是对定标精度的影响。Landsat系列卫星辐射定标的发展过程为遥感数据高精度定量化应用提供了非常重要的基础,未来辐射定标方法不但要随着新型遥感器研制而更新,更要注重多源遥感数据的交叉验证以及全过程辐射定标方法的完善与应用,保障遥感数据辐射定标精度的一致性。Sensors of Landsat mission satellites have systemically acquired moderate-resolution multispectral images of the Earth for more than 40 years since Landsat 1 was launched in 1972. The images have been extensively applied,such as in global change,agriculture,forestry,geology,resource management,geography,cartography,and coastal research. These successive images are important to characterize and detect changes in land cover and land use worldwide. Many studies consider these data to perform long-term monitoring of the quantitative information of surface on medium-resolution scales to reflect refined climate change in localor even global scale. The premise of these studies is to conduct radiometric calibration of long sequential data over decades and ensure the consistency of sequential data radiation through cross calibration of different satellites. Radiometric calibrations are constantly updated from Landsat 1 to Landsat 8. Moreover,sensor performance and data acquisition abilities are improved,which involve preflight calibration,internal lamp calibrator,full aperture solar calibrator,cross calibration method,and vicarious calibration based on test sites.This review classified the sensors of Landsat mission satellites based on their performance. Their imaging modes were summarized and compared to determine the advantages and disadvantages of each mode. Then,the development of various radiometric calibration methods was reviewed. The merits and demerits of these methods,as well as the impacts on the accuracy of calibration results,were analyzed. During prelaunch,the calibration of various sensors was mainly based on calibrated integrating sphere. The difference in the time between the integrating sphere calibration and that of sensor calibration caused calibration uncertainty to a certain degree. The consistency of calibration time improved calibration accuracy by approximately 10%. The main calibration equipment comprised lamps and solar calibrator systems during in-orbit. With the advancement from Landsat 4 to L

关 键 词：Landsat系列 光学传感器 辐射定标 定标精度 交叉定标 

分 类 号：TP732[自动化与计算机技术—检测技术与自动化装置]