中巴地球资源一号卫星CCD图像质量评价和交叉定标研究

使用定量分析方法评价了中巴地球资源卫星CCD相机遥感数据质量 ,在此基础上利用LANDSAT 7ETM 对CCD的对应波段进行交叉定标计算 ,得到了一组CCD的参考定标系数。在遥感数据质量评价研究中 ,使用统计分析方法计算得到了CCD相机图像数据的条纹强度 ;应用结构函数方法计算获得了CCD的噪声数据 ;通过功率谱计算 ,对比分析了CCD和LANDSAT 7ETM 对应波段图像空间纹理特征。该文通过交叉定标计算 ,得到了CCD相机前 4个波段的参考定标系数、动态范围和噪声等效反射率等参考指标 ,并对这组定标系数进行了验证 ,从验证结果中发现CCD1,2 ,3和LANDSAT 7ETM 对应波段反射率最大相差 1 98% ,最小0 0 3% ,平均差要低于 1 31% ,而波段 4最大也仅相差 4 4 1% ,平均差 3 0 2 % ,证明计算得到的交叉定标系数具有较高的参考价值

CBERS-1''s CCD Image Quality Evaluating and Cross Calibrating Study

This paper evaluates the image data quality for CBRS-1's CCD by quantitative method, and provide a group of reference calibration coefficients for its CCD data by cross calibrating method using LANDSAT 7 ETM data. The paper obtains the stripe intension information of CCD image by statistical analyzing method, computes the CCD data noise using structure function method, and characterizes the spatial texture of CCD and LANDSAT 7 ETM via power spectrum analyzing. The paper calibrates the CCD band 1-4 spectral data, and calculates its dynamic range through corresponding LANDSAT 7 ETM data using cross calibration technology. The validation for the cross calibration shows that CCD band 1-3 maximum reflectance error is 1.98% based corresponding LANDSAT 7 ETM band,minimum reference error is 0.03%, average value is 1.31%, the maximum error of CCD band 4 is 4.41%, average value is 3.02%. This result indicates that this new cross calibration coefficient is valuable and useful.