Correction of Dual PRF Velocity Errors for Operational Doppler Weather Radars
Correction of Dual PRF Velocity Errors for Operational Doppler Weather Radars
复制标题
实用多普勒天气雷达双 PRF 速度误差的校正
DOI：
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发表时间：
2003
期刊：
影响因子：
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通讯作者：
P. May
中科院分区：
文献类型：
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作者：
P. Joe;P. May
双脉冲重复频率（PRF）是业务多普勒天气雷达网中常用的一种技术，用于扩展无模糊多普勒速度。该技术需要在两个不同的PRF下测量径向速度，并且它假设数据是从相同的速度收集的。实际上，当天线旋转时，从相邻的交替PRF径向收集数据。然而，由于测量中的不确定性而导致的高方位角剪切或统计误差会产生去混叠误差。本文提出了两种算法来纠正这些去混叠错误，并分析了结果。模拟和真实的情况下，说明的好处和局限性。
Dual pulse repetition frequency (PRF) is a commonly used technique, in operational Doppler weather radar networks, that extends the unambiguous Doppler velocity. The technique requires the measurement of the radial velocity at two different PRFs and it assumes that the data is collected from the same velocity. In practice, the data are collected from adjacent alternating PRF radials as the antenna rotates. However, high azimuthal shear or statistical errors due to uncertainty in the measurements can create dealiasing errors. This paper proposes two algorithms to correct these dealiasing errors and analyzes the results. Simulations and real cases are presented to illustrate the benefits and limitations.