Research on Rainfall Monitoring Based on E-Band Millimeter Wave Link in East China
Siming Zheng,
Congzheng Han,
Juan Huo,
Wenbing Cai,
Yinhui Zhang,
Peng Li,
Gaoyuan Zhang,
Baofeng Ji,
Jiafeng Zhou
Affiliations
Siming Zheng
Electronics and Communication Engineering Laboratory, Key Laboratory of Middle Atmosphere and Global Environment Observation, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing 100029, China
Congzheng Han
Electronics and Communication Engineering Laboratory, Key Laboratory of Middle Atmosphere and Global Environment Observation, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing 100029, China
Juan Huo
Electronics and Communication Engineering Laboratory, Key Laboratory of Middle Atmosphere and Global Environment Observation, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing 100029, China
Wenbing Cai
Beijing Institute of Tracking and Telecommunications Technology, Beijing 100094, China
Yinhui Zhang
Beijing Institute of Tracking and Telecommunications Technology, Beijing 100094, China
Peng Li
School of Electronics and Information Engineering, Nanjing University of Information Science and Technology, Nanjing 210044, China
Gaoyuan Zhang
Electronics and Communication Engineering Laboratory, Key Laboratory of Middle Atmosphere and Global Environment Observation, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing 100029, China
Baofeng Ji
Electronics and Communication Engineering Laboratory, Key Laboratory of Middle Atmosphere and Global Environment Observation, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing 100029, China
Jiafeng Zhou
Department of Electrical Engineering and Electronics, University of Liverpool, Liverpool L69 3GJ, UK
Accurate rainfall observation data with high temporal and spatial resolution are essential for national disaster prevention and mitigation as well as climate response decisions. This paper introduces a field experiment using an E-band millimeter-wave link to obtain rainfall rate information in Nanjing city, which is situated in the east of China. The link is 3 km long and operates at 71 and 81 GHz. We first distinguish between the wet and the dry periods, and then determine the classification threshold for calculating attenuation baseline in real time. We correct the influence of the wet antenna attenuation and finally calculate the rainfall rate through the power law relationship between the rainfall rate and the rain-induced attenuation. The experimental results show that the correlation between the rainfall rate retrieved from the 71 GHz link and the rainfall rate measured by the raindrop spectrometer is up to 0.9. The correlation at 81 GHz is up to 0.91. The mean relative errors are all below 5%. By comparing with the rainfall rate measured by the laser raindrop spectrometer set up at the experimental site, we verified the reliability and accuracy of monitoring rainfall using the E-band millimeter-wave link.
