Determining Weather Radar Antenna Pointing Using Signals Detected from the Sun at Low Antenna Elevations
Determining Weather Radar Antenna Pointing Using Signals Detected from the Sun at Low Antenna Elevations
复制标题
使用低天线仰角检测到的太阳信号确定气象雷达天线指向
DOI：
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发表时间：
2007
期刊：
影响因子：
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通讯作者：
I. Holleman
中科院分区：
文献类型：
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作者：
A. Huuskonen;I. Holleman
摘要提出了一种利用扫描雷达观测到的太阳信号确定雷达天线仰角和方位角偏差的方法。本文利用低仰角记录的大气折射对无线电波传播有显著影响的数据，提出了一种在分析中考虑大气折射影响的方法。给出了一组方程，通过该方程可以很容易地计算出无线电波的折射作为相对湿度的函数。并给出了大气衰减计算的简化模型。采用的大气折射率和大气衰减模型的一致性是通过在一个单一的高程点上收集的数据来证实的，但需要很长的观测时间。最后，将该方法应用于芬兰气象研究所（FMI）和荷兰皇家气象研究所（KNMI）的业务测量数据集，并分析了芬兰和荷兰的海拔和方位角偏差。
Abstract A method to determine the elevation and azimuth biases of the radar antenna using solar signals observed by a scanning radar is presented. Data recorded at low elevation angles where the atmospheric refraction has a significant effect on the propagation of the radio wave are used, and a method to take the effect of the refraction into account in the analysis is presented. A set of equations is given by which the refraction of the radio waves as a function of the relative humidity can easily be calculated. Also, a simplified model for the calculation of the atmospheric attenuation is presented. The consistency of the adopted models for the atmospheric refraction and atmospheric attenuation is confirmed by data collected at a single elevation pointing, but over a long observing time. Finally, the method is applied to datasets based on operational measurements at the Finnish Meteorological Institute (FMI) and Royal Netherlands Meteorological Institute (KNMI), and elevation and azimuth biases of the ...