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首页> 外文期刊>IEEE Geoscience and Remote Sensing Letters >Polarimetric Channel Misregistration Evaluation for the GaoFen-3 QPSI Mode
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Polarimetric Channel Misregistration Evaluation for the GaoFen-3 QPSI Mode

机译：GAOFEN-3 QPSI模式的偏振频道误解评估

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摘要

This letter presents two main contributions to the data quality assessment of China's new GaoFen-3 radar satellite. First, we observed a half-pixel misregistration between the horizontal (H) and vertical (V) transmitting channels in the azimuth direction. This was determined by investigating the corner reflector (CR) response of some stripmap products of GaoFen-3 quad-pol stripmap (QPSI) mode. Second, to check whether the azimuth misregistration exists in different beams of QPSI mode, we improved the RADARSAT-2 channel checking method as a tool and evaluated more than 300 stripmap scenes. This letter confirms that the half-pixel misregistration problem, which can cause about 10% decoherence in the co-pol and cross-pol channel correlation coefficients, is common in the GaoFen-3 stripmap products of QPSI mode. Furthermore, the improved method can be considered as an effective way to fix the misregistration problem.
机译：这封信为中国新的高芬-3雷达卫星的数据质量评估提供了两个主要贡献。首先，我们在方位方向上观察了水平（H）和垂直（V）发送通道之间的半像素误解。这是通过研究GAOFEN-3 Quad-POL RILTMAP（QPSI）模式的一些条带图产品的拐角反射器（CR）响应来确定。其次，要检查方位误解是否存在于不同光束的QPSI模式中，我们将RADARSAT-2通道检查方法改进为工具，并评估了300多个RILTMAP场景。这封信证实了半像素的误解问题，它可以在CO-POL和COLL-POL通道相关系数中导致约10％的角色，在QPSI模式的高芬-3条带材映射产品中是常见的。此外，改进的方法可以被认为是修复误解问题的有效方法。

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  • 来源
    《IEEE Geoscience and Remote Sensing Letters》 |2019年第4期|544-548|共5页
  • 作者

    Shi Lei; Li Pingxiang; Yang Jie; Zhang Liangpei; Ding Xiaoli; Zhao Lingli;

  • 作者单位

    Wuhan Univ State Key Lab Informat Engn Surveying Mapping & R Wuhan 430079 Hubei Peoples R China;

    Wuhan Univ State Key Lab Informat Engn Surveying Mapping & R Wuhan 430079 Hubei Peoples R China;

    Wuhan Univ State Key Lab Informat Engn Surveying Mapping & R Wuhan 430079 Hubei Peoples R China;

    Wuhan Univ State Key Lab Informat Engn Surveying Mapping & R Wuhan 430079 Hubei Peoples R China;

    Hong Kong Polytech Univ Dept Land Surveying & Geoinformat Hong Kong 999077 Peoples R China;

    Wuhan Univ Sch Remote Sensing & Informat Engn Wuhan 430079 Hubei Peoples R China;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Azimuth misregistration; GaoFen-3; polarimetric;

    机译：azimuth MIS registration;GA of恩-3;polar i metric;

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