中巴资源一号卫星南京幅数据质量与几何纠正评价

首先对中巴资源一号卫星主要技术参数与性能指标作了介绍,然后选取了高分辨率CCD相机接收的2、3、4波段数据(南京地区)进行处理,发现2波段中有若干明显的条带,找出了引起条带的原因,通过未去除条带3个波段的合成图像与去除条带后3个波段的合成图像相比,图像质量有明显的改善,分别对两种合成图像进行几何纠正,发现后者效果明显好于前者。对几何纠正后的图像进行了分析,地面分辨率达20 m,可用于土地利用、森林覆盖、地质和农业等专题信息的提取。

Evaluation on Data Quality and Geometric Correction of China-Brazil Resources Satellite No.1 Data in Nanjing Area

In this paper, the major technical parameter and characteristic index of China-Brazil Resources Satellite No.1 are given. And the data received by high resolving power CCD camera are selected. The data include three wave bands of Nanjing area which are the second, third, fourth wave band. In data processing of the second wave band, there are several apparent stripes and the reasons that cause the stripes have been checked out. Then it contrasts the three wave band stack image not removed of stripes and the three wave band stack image removed of stripes. Through that, we found that the image quality is improved apparently. Geometric correction is applied to these two stacks image. And the quality of the latter is better than that of the former. The image processed by geometric correction is analysed and the image information shows that its ground resolution reaches 20 meters. We can conclude that the data of China|Brazil Resources Satellite could be applied to extraction of special information, such as land use, forest cover, geology and agriculture, etc.