• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文会议>Sensors, systems, and next-generation satellites XX >Novel techniques for the analysis of the TOA radiometric uncertainty
【24h】

Novel techniques for the analysis of the TOA radiometric uncertainty

机译：TOA辐射不确定度分析的新技术

获取原文
获取原文并翻译 | 示例
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

In the framework of the European Copernicus programme, the European Space Agency (ESA) has launched the Sentinel-2 (S2) Earth Observation (EO) mission which provides optical high spatial -resolution imagery over land and coastal areas. As part of this mission, a tool (named S2-RUT, from Sentinel-2 Radiometric Uncertainty Tool) estimates the radiometric uncertainties associated to each pixel using as input the top-of-atmosphere (TOA) reflectance factor images provided by ESA. The initial version of the tool has been implemented - code and user guide available - and integrated as part of the Sentinel Toolbox. The tool required the study of several radiometric uncertainty sources as well as the calculation and validation of the combined standard uncertainty in order to estimate the TOA reflectance factor uncertainty per pixel. Here we describe the recent research in order to accommodate novel uncertainty contributions to the TOA reflectance uncertainty estimates in future versions of the tool. The two contributions that we explore are the radiometric impact of the spectral knowledge and the uncertainty propagation of the resampling associated to the orthorectification process. The former is produced by the uncertainty associated to the spectral calibration as well as the spectral variations across the instrument focal plane and the instrument degradation. The latter results of the focal plane image propagation into the provided orthoimage. The uncertainty propagation depends on the radiance levels on the pixel neighbourhood and the pixel correlation in the temporal and spatial dimensions. Special effort has been made studying non-stable scenarios and the comparison with different interpolation methods.
机译：在欧洲哥白尼计划的框架内，欧洲航天局（ESA）启动了Sentinel-2（S2）地球观测（EO）任务，该任务提供了陆地和沿海地区的光学高空间分辨率图像。作为此任务的一部分，一个工具（来自Sentinel-2辐射不确定度工具，名为S2-RUT）使用ESA提供的大气顶部（TOA）反射系数图像作为输入，估算与每个像素相关的辐射不确定度。该工具的初始版本已实现-提供了代码和用户指南-并已集成为Sentinel Toolbox的一部分。该工具需要研究几种辐射不确定性源以及组合标准不确定性的计算和验证，以便估算每个像素的TOA反射系数不确定性。在这里，我们描述了最近的研究，以便在该工具的未来版本中为TOA反射率不确定性估计提供新颖的不确定性贡献。我们探索的两个贡献是光谱知识的辐射测量影响和与正射校正过程相关的重采样的不确定性传播。前者是由与光谱校准相关的不确定性以及整个仪器焦平面上的光谱变化和仪器退化产生的。后者的结果是焦平面图像传播到所提供的正像中。不确定性传播取决于像素邻域上的辐射水平以及时间和空间维度上的像素相关性。在研究不稳定场景以及与不同插值方法进行比较方面，已经做出了特别的努力。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号