摘要
针对移动X波段双线偏振多普勒天气雷达,提出了一套差分相位数据质量控制算法,包括地物杂波抑制、退折叠、初始差分相位调整和滤波等,然后利用2个个例分析了这种差分相位数据质量控制算法的效果。结果表明,该算法能有效地识别和消除差分相位数据中的地物杂波、退掉折叠的相位和滤除正常的随机差分相位波动。
The specific differential propagation phase is an important parameter for meteorological applications,because it is not affected by propagation attenuation and closely related to rain intensity.To estimate the specific differential propagation phase requires to compute the derivative of range profiles of the differential phase.The existence of possible phase wrapping,ground clutter,noise,backscattering phase and associated fluctuation in the differential phase makes the derivative evaluation having an unstable numerical process.In this paper,for mobile X-band dual-polarimetric doppler weather radar in the alternative transmission mode developed by Anhui Sun-Create Electronics Co.,Ltd.,a set of algorithm is presented to control the data quality of the differential phase,including ground clutter removing,phase unfolding,initial phase adjusting and phase filtering.Two cases are studied to evaluate the algorithm.The results show the algorithm can remove effectively the ground clutter,unfold wrapped phases and filter fluctuations associated with noise and backscattering phase.
出处
《高原气象》
CSCD
北大核心
2012年第1期223-230,共8页
Plateau Meteorology
基金
公益性行业(气象)科研专项(GYHY200706020
GYHY200906010)
国家自然科学基金项目(40975025)共同资助
关键词
X波段双线偏振多普勒天气雷达
差分相位
质量控制
X-band dual-polarimetric Doppler weather radar Differential phase Data quality control
