Implementation of polarization diversity pulse-pair technique using airborne W-band radar
Implementation of polarization diversity pulse-pair technique using airborne W-band radar
复制标题
利用机载W波段雷达实现偏振分集脉冲对技术
DOI：
10.5194/amt-12-253-2019
复制
发表时间：
2018
影响因子：
3.8
通讯作者：
A. Illingworth
中科院分区：
文献类型：
--
作者：
M. Wolde;A. Battaglia;C. Nguyen;A. Pazmany;A. Illingworth
抽象的。这项工作描述了实现极化分集上的
国家研究理事会加拿大W波段多普勒雷达，并介绍了
通过极化分集获得的首次机载多普勒测量
脉冲对处理极化分集脉冲对测量是
与具有交错脉冲重复频率的标准脉冲对测量交错，这允许更好地理解强度，
极化分集的缺点，一种最近被
用于风聚焦多普勒雷达空间任务。偏振
分集具有明显的优势，使多普勒观测成为可能，
非常快的解相关介质（如在
快速移动的卫星）和扩大奈奎斯特间隔，从而使
观察到非常高多普勒速度（高达
100 m s−1 in
目前的工作）。两个偏振之间的串扰，主要由
后向散射的去极化，降低了观测质量
通过在功率信号中引入重影回波以及通过增加噪声
多普勒测量的水平。在本报告所分析的不同案例中，
现场活动中，受串扰影响的区域通常与
具有高度去极化的表面回波和反向散射的去极化
来自飞机附近的水凝物。的方差
多普勒速度估计可以从理论上很好地预测，
也直接从观察到的H-极化
和V偏振连续脉冲。这项研究是一个重要的里程碑
实现多普勒星载极化分集
雷达
Abstract. This work describes the implementation of polarization diversity on the
National Research Council Canada W-band Doppler radar and presents the
first-ever airborne Doppler measurements derived via polarization diversity
pulse-pair processing. The polarization diversity pulse-pair measurements are
interleaved with standard pulse-pair measurements with staggered pulse repetition frequency, this allows a better understanding of the strengths and
drawbacks of polarization diversity, a methodology that has been recently
proposed for wind-focused Doppler radar space missions. Polarization
diversity has the clear advantage of making possible Doppler observations of
very fast decorrelating media (as expected when deploying Doppler radars on
fast-moving satellites) and of widening the Nyquist interval, thus enabling
the observation of very high Doppler velocities (up to more than
100 m s−1 in
the present work). Crosstalk between the two polarizations, mainly caused by
depolarization at backscattering, deteriorated the quality of the observations
by introducing ghost echoes in the power signals and by increasing the noise
level in the Doppler measurements. In the different cases analyzed during the
field campaigns, the regions affected by crosstalk were generally associated
with highly depolarized surface returns and depolarization of backscatter
from hydrometeors located at short ranges from the aircraft. The variance of
the Doppler velocity estimates can be well predicted from theory and were
also estimated directly from the observed correlation between the H-polarized
and V-polarized successive pulses. The study represents a key milestone
towards the implementation of polarization diversity in Doppler space-borne
radars.
用于风研究的多普勒 W 波段偏振分集星载雷达模拟器
影响因子：
3.8
作者：
Battaglia A
通讯作者：
Battaglia A