大气科学2025，Vol.49Issue(6)：1675-1690,16.DOI:10.3878/j.issn.1006-9895.2412.24008
四川省闪电定位系统升级前后对比评估
Comparative Evaluation of the Lightning Location System in Sichuan Province Before and After the Upgrade
摘要
Abstract
This article presents a comparative analysis of the detection performance differences between two types of lightning location systems,namely,the newly built DDW1 lightning locators and the original ADTD lightning locators in Sichuan Province.The analysis is based on 2022 observation data from 78 DDW1 and 19 ADTD sensors.The research findings are as follows.(1)Under an altitude threshold of 1000 m,topography significantly affects the configurations of the lightning detection network.Station spacing in mountainous regions varies greatly and lacks uniformity,whereas networks in plains are more compact and evenly distributed.(2)The cloud-to-ground flash positioning derived from the DDW1 and ADTD systems is consistent with radar echoes.(3)Excepting the Ganzi station,the trigger thresholds of the 16 co-located stations for both systems exhibit consistency.In addition,the 15 co-located stations show high consistency in terms of GPS error amplification factors and noise passing rates.However,five co-located sites demonstrate inconsistencies in crystal oscillator deviation values.(4)In most areas of Sichuan Province,the cloud-to-ground lightning density of the DDW1 system is approximately twice that of the ADTD system.However,detection limitations for thunderstorms persist in western Sichuan Province.The positive and negative return stroke current peaks detected by the ADTD system are in the ranges of 20 kA to 30 kA and-30 kA to-20 kA,respectively,whereas the corresponding peak values of the DDW1 system are in the ranges of 10 kA to 20 kA and-20 kA to-10 kA,respectively.The positive and negative return stroke peak current intensities of the DDW1 system are approximately 1.04 times those of the ADTD system.(5)Overall,the consistency of the normalized return stroke electric field,north-south peak magnetic field,east-west peak magnetic field,and azimuth angle of the DDW1 and ADTD sensors at the same site is poor.However,the consistency of return stroke time and post-zero-crossing time is moderate.(6)The time distribution of cloud-to-ground flash positioning results for the DDW1 and ADTD systems follows a similar pattern to that of return strokes detected by the stations,exhibiting an approximate bimodal distribution with peak activity observed at night and a decrease during noon.(7)The capture rates of return strokes for the DDW1 and ADTD stations are suboptimal.In the future,developing propagation time correction algorithms suitable for complex terrains and applying equipment measurement calibration technology to the National Lightning Detection Network(CNLDN)are recommended.These research findings provide a scientific basis for the continued construction,operation,and application of CNLDN's observation data.关键词
国家雷电观测网/DDW1型闪电定位仪/闪电定位/一致性/自评估Key words
National Lightning Detection Network/DDW1 lightning locator/Lightning positioning/Consistency/Self-evaluation分类
天文与地球科学引用本文复制引用
田野,庞文静,陈泽方,赖悦,王璐,谢娜娜,刘显萌..四川省闪电定位系统升级前后对比评估[J].大气科学,2025,49(6):1675-1690,16.基金项目
中国气象局气象探测中心优质计划项目YZJH24-13,国家自然科学基金项目42205091,北京市自然科学基金项目8252020 High-Quality Plan of the China Meteorological Administration Meteorological Observation Center(Grant YZJH24-13),National Natural Science Foundation of China(Grant 42205091),Natural Science Foundation of Beijing(Grant 8252020) （Grant YZJH24-13）
