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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：高分3 QPSI模式的极化通道失配评估

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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：这封信提出了对中国新型高分3号雷达卫星数据质量评估的两个主要贡献。首先，我们观察到在水平方向（H）和垂直方向（V）的传输通道之间在方位方向上出现了半像素重合失调。这是通过研究某些高芬3四极点带状图（QPSI）模式的带状图产品的角反射器（CR）响应来确定的。其次，为了检查在QPSI模式的不同波束中是否存在方位失准，我们改进了RADARSAT-2信道检查方法作为工具，并评估了300多个带状图场景。这封信确认了在QPSI模式的GaoFen-3条形图产品中常见的半像素重合失调问题可能会导致co-pol和cross-pol通道相关系数出现约10％的去相干性。此外，改进的方法可以被认为是解决套准问题的有效方法。

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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
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  • 关键词

    Azimuth misregistration; GaoFen-3; polarimetric;

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

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