Simulation and Interpretation of the Phase Data Used by the Radar Refractivity Retrieval Algorithm
Simulation and Interpretation of the Phase Data Used by the Radar Refractivity Retrieval Algorithm
复制标题
雷达折射率反演算法使用的相位数据的模拟和解释
DOI：
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复制
发表时间：
2010
期刊：
影响因子：
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通讯作者：
F. Fabry
中科院分区：
文献类型：
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作者：
Shinju Park;F. Fabry
摘要雷达水汽活动反演算法应用于地面目标的雷达相位测量，可以在时间和空间上提供高分辨率的近地表水汽估计。检索的可靠性取决于返回的相位测量的质量，其受到诸如以下的因素的影响：1）折射率沿着射线路径的垂直变化和2）被照射的地面目标的性质（例如，雷达射线在复杂地形上截获的目标的高度和形状）。这些因素在相位测量中引入了模糊性，而这在相位测量算法中还没有被考虑到，并且妨碍了相位测量算法的性能。设计了一个相位测量模拟器，以更好地了解这些因素的影响。从模拟的结果进行了比较，从低层无线电探测配置文件估计选定的大气传播条件与观测到的相位测量。地球活动垂直梯度的变化加上...
Abstract The radar refractivity retrieval algorithm applied to radar phase measurements from ground targets can provide high-resolution, near-surface moisture estimates in time and space. The reliability of the retrieval depends on the quality of the returned phase measurements, which are affected by factors such as 1) the vertical variation of the refractive index along the ray path and 2) the properties of illuminated ground targets (e.g., the height and shape of the targets intercepted by radar rays over complex terrain). These factors introduce ambiguities in the phase measurement that have not yet been considered in the refractivity algorithm and that hamper its performance. A phase measurement simulator was designed to better understand the effect of these factors. The results from the simulation were compared with observed phase measurements for selected atmospheric propagation conditions estimated from low-level radio sounding profiles. Changes in the vertical gradient of refractivity coupled with...