Motion-Compensated Steering: Enhanced Azimuthal Resolution for Polarimetric Rotating Phased Array Radar
Motion-Compensated Steering: Enhanced Azimuthal Resolution for Polarimetric Rotating Phased Array Radar
复制标题
运动补偿转向：增强偏振旋转相控阵雷达的方位分辨率
DOI：
--
复制
发表时间：
2021
影响因子：
8.2
通讯作者：
Tian
中科院分区：
文献类型：
--
作者：
D. Schvartzman;S. Torres;Tian
旋转相控阵雷达（RPAR）是一种架构，可以提高目前的天气监视雷达-1988多普勒（WSR-88 D）业务网络的能力，可能比其他候选PAR架构更便宜。然而，与基于固定天线的架构相比，连续的天线旋转与执行多个样本的相干处理的需要相结合导致降级的有效波束宽度（被称为波束拖尾）。RPAR的波束灵活性可以被利用来通过在相干处理间隔内以脉冲到脉冲的基础上电子地操纵波束来减少波束拖尾效应。也就是说，可以补偿天线的运动以保持波束指向被采样的分辨率体积的中心。这种运动补偿转向（MCS）可以减少天线运动的影响，并导致有效波束宽度的减少。本文的目的是介绍和演示双极化RPAR系统的MCS技术。在这篇文章中，我们提供了一个配方的MCS技术，模拟量化其性能在减轻波束拖尾效应，其对质量的双极化雷达变量估计的影响，并在国家严重风暴实验室的先进技术演示（ATD）系统的实际实施。使用本文中描述的两种备选操作概念（CONOPS）进行了实验。结果表明，一个系统设计有足够的指向精度可以操作作为一个RPAR使用MCS，雷达变量估计的影响是可比的，当操作相同的系统作为一个固定的PAR。
The rotating phased array radar (RPAR) is an architecture that could improve the capabilities of the current weather surveillance radar—1988 Doppler (WSR-88D) operational network and is likely to be more affordable than other candidate PAR architectures. However, continuous antenna rotation coupled with the need to perform coherent processing of multiple samples results in a degraded effective beamwidth (referred to as beam smearing) compared to architectures based on stationary antennas. The RPAR’s beam agility can be exploited to reduce beam-smearing effects by electronically steering the beam on a pulse-to-pulse basis within the coherent processing interval. That is, the motion of the antenna can be compensated to maintain the beam pointed at the center of resolution volume being sampled. This motion-compensated steering (MCS) could reduce the effects of antenna motion and lead to a reduction in the effective beamwidth. The purpose of this article is to present and demonstrate the MCS technique for a dual-polarization RPAR system. In this article, we provide a formulation for the MCS technique, simulations to quantify its performance in mitigating beam-smearing effects, its impacts on the quality of dual-polarization radar-variable estimates, and a practical implementation on the National Severe Storms Laboratory’s Advanced Technology Demonstrator (ATD) system. Experiments were carried out using two alternative concepts of operations (CONOPS) described in this article. Results show that a system designed with sufficient pointing accuracy can be operated as an RPAR using MCS, and the impact on radar-variable estimates is comparable to that obtained when operating the same system as a stationary PAR.