利用手机通信基站信号测量降水分布的初步研究

Preliminary Study on the Novel Precipitation Estimation Method Based on Mobile Communications Base Station Signal

利用手机通信基站信号的衰减反演降水分布是一种较为新兴的降水测量方法。本文利用2014年5月4～5日福州市手机通信基站、雨量站以及降水雷达观测资料,对比分析了3种估测降水方法的精度。结果表明,手机通信基站信号衰减法测得的降水结果整体略大于雨量站测量结果,平均偏差为0. 3 mm/h,但两者的相关性较好,可达0. 92。降水雷达测量结果则整体偏小,且降水中心位置偏差较大,最大偏差可达20 km,相关系数也仅有0. 82。上述结论表明基站信号衰减法对降水的测量,具有准确性好,时空分辨率高等优点,可以作为现有降水测量方法的补充。

To estimate the precipitation amount from the attenuation of communication signal is relatively a novel and promising method for its measurement with high accuracy and spatio-temporal resolution. Using the observational data of mobile communications obtained from the base stations,a comparative analysis had been made on the accuracy for three kinds of methods used to estimate precipitation using rain gauge and precipitation radar of Fuzhou during the period May 4-5,2014. Results showed that the mobile base station measurement tends to be overestimated compared with the rain gauge observations for the entire period,with an average deviation of 0. 3 mm/h and correlation coefficient as high as 0. 92. In contrast,the rainfall estimation from precipitation radar tends to be underestimated relative to the rain gauge measurement,and the location where the largest precipitation occurred has relatively large errors with the maximum deviation up to 20 km. The correlation coefficient between these two measurements was observed to be fair with 0. 82. The key findings obtained here indicate that the method is promising for quantifying the precipitation distribution,and has the potential to serve as a complementary to the existing methods to estimate precipitation.