环境与灾害监测预报小卫星CCD数据质量评价

doi:10.11867/j.issn.1001-8166.2011.09.0971

地球科学进展 ›› 2011, Vol. 26 ›› Issue (9): 971 -979. doi: 10.11867/j.issn.1001-8166.2011.09.0971

刘睿 ^1,2，孙九林 ²，王卷乐 ²，廖秀英 ²

1.重庆师范大学地理科学学院，重庆 400047；
2.资源与环境信息系统国家重点实验室，中国科学院地理科学与资源研究所，北京 100101

收稿日期:2010-12-11 修回日期:2011-07-31 出版日期:2011-09-10
通讯作者: 刘睿
基金资助:
国家自然科学基金项目“基于ISO元数据扩展模型的土地覆盖分类体系构建及语义转换”（编号：40801180）；科技基础性工作专项项目“中国北方及其毗邻地区综合科学考察”（编号：SB2007FY442）；环境保护部公益性行业专项“面向我国环境管理的环境变化信息集成与服务系统”（编号：201109075）资助.

Data Quality Evaluation of Chinese HJ CCD Sensor

Liu Rui ^1,2, Sun Jiulin ², Wang Juanle ², Liao Xiuying ²

1. College of Geographical Science, Chongqing Normal University, Chongqing 400047, China;
2. State Key Laboratory of Resources and Environmental Information Systems, Institute of Geographical Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing 100101, China

Received:2010-12-11 Revised:2011-07-31 Online:2011-09-10 Published:2011-09-10

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中国环境与灾害监测预报小卫星星座双星4部CCD传感器具备大范围、全天时环境与灾害监测等方面的能力，在空间覆盖与重复观测频率方面有很大的优势。结合美国陆地卫星TM数据，从几何精度、辐射质量2个方面定量分析了该卫星CCD传感器的数据质量。结果表明：①环境减灾卫星CCD数据无波段错位现象，有极小的畸变与扭曲(0.05%)，然而存在较大的整体几何误差。②CCD数据的整体辐射范围、信噪比与TM数据相比并无明显区别，但其清晰度的不足导致在地物识别、特征提取与图像量测方面的应用存在着一定的限制。③CCD数据的信息量较为丰富，4、3、2波段的标准假彩色合成包是波段合成方案中的最佳波段组合。CCD数据的功率谱保证了其具有丰富的纹理特征，对于诸如土地利用/覆被变化等方面的研究，其信息量与纹理特征能够保证其应用精度。④CCD传感器4个波段间，近红外与红波段表现最好，与TM传感器相应波段相比质量相当，其次为绿波段与蓝波段。

关键词: 几何精度, 辐射质量, 清晰度, 信息熵, 功率谱

The Chinese environmental mitigation HJ satellite CCD sensors are capable of large area and all-time monitoring, and have a great advantage in coverage and frequency of repeated observations. However, as a relative newly remote sensing sensor, it is essential to evaluate the data quality for further applications. Based on the introduction of HJ CCD sensor and combined with LandSat TM data, the geometry accuracy and radiance quality of HJ CCD data was quantitative evaluated in this paper. The results showed that: ①There is no deviation between the 4 bands of HJ CCD, and compared with TM, very small geometric distortion is detected (0.05%). However, there′s large geometric error in both X and Y direction. ②There is no obvious difference in radiation range and signal to noise ratio between the two sensors, but the image sharpness of CCD data can only achieve about half of TM, which leads to application limitation for object recognition and feature extraction, etc. ③The CCD data is rich in amount of information, and standard false colour composition of band 4, 3, 2 is the best band combination choice. Meanwhile, the power spectral of CCD data guaranteed the abundant texture feature, which will ensure the application accuracy in studies such as classification. ④Near infrared and red band showed the best quality between the CCD bands, and followed by green and blue band.

Key words: Geometric accuracy, Radiance quality, Image sharpness, Information entropy, Power Spectral

中图分类号:

TP732

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