In-flight absolute calibration of the Landsat-5 TM on the test site Salar de Uyuni
In-flight absolute calibration of the Landsat-5 TM on the test site Salar de Uyuni
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DOI：
10.1109/tgrs.2004.836386
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发表时间：
2004-12-01
影响因子：
8.2
通讯作者：
Arnaud, Y
中科院分区：
文献类型：
--
作者：
Ponzoni, FJ;Zullo, J;Arnaud, Y
在巴西，由于在利用遥感技术进行自然资源研究方面越来越多地采用定量方法，因此需要了解专题制图仪和增强型专题制图仪等遥感器的辐射测量条件。在巴西遥感界，经常需要在辐射测量数据与生物物理和地球物理数据之间建立相互关系，这就增加了对校准系数的需求，以便将数字转换为辐射率和反射率等物理值。自中巴环境遥感卫星成为现实以来，开展校准活动的必要性大大增加。根据Price和其他研究人员的建议，在玻利维亚的乌尤尼盐沼对Landsat-5数据进行了飞行中绝对校准。由于带TM 1的饱和度和影响TM 5和TM 7的表面湿度条件，仅可能确定带TM 2、TM 3和TM 4的校准系数。这里采用的方法似乎足以确定轨道传感器的有效校准系数。
In Brazil, the increase of the application of quantitative approaches in the natural resources studies using remote sensing technology has required knowledge about the radiometric conditions of remote sensors as the Thematic Mapper (TM) and the Enhanced TM Plus, for instance. The establishment of a correlation between radiometric data and biophysical and geophysical ones has become a frequent need in the Brazilian remote sensing community, and it has increased the demand of calibration coefficients in order to transform digital numbers to physical values like radiance and reflectance. Since the China-Brazil Environmental Remote Sensing Satellite became a reality, the necessity to perform calibration campaigns increased significantly. Following Price and other researcher's suggestions, an in-flight absolute calibration of the Landsat-5 data was carried out in the Salar de Uyuni, Bolivia. It was only possible to determine calibration coefficients for bands TM2, TM3, and TM4 due to the saturation of band TM1 and surface moisture conditions that impacted the TM5 and TM7. The methodology applied here seemed to be sufficient to determine valid calibration coefficients for orbital sensors.