摘要
通过第八届世界气象组织阳江国际探空比对,采取同球比对施放方式,选择全球卫星导航测风作为比对标准,对中国目前业务使用的GFE(L)1型二次雷达系统测风能力开展系统性评估。初步评估结果表明,二次雷达测量的风向风速与全球卫星导航测风结果的趋势一致性很好,风速测量准确性与稳定性明显好于风向;二次雷达风速随高度与风速误差略有增加,但差别不大,能保持很高的测量精度;而风向误差以中空最大,低空次之,16km以上高空明显好于其它层次,在风速大于16m/s误差明显减小;但二次雷达测风误差波动较大,稳定性相对较差,特别表现在近地面层与中空,因此未来测风应逐渐向卫星导航测风体制发展,以提高中国高空风探测的水平。
Based on the 8th WMO(World Meteorological Organization) international radiosonde intercomparison hold at Yangjiang of Guangdong province,the systematic evaluation of wind-finding capability performance for GFE(L)1 Secondary Radar,which is currently in Chinese upper-air operation,is carried out by choosing GPS(Global Position System) wind-finding as reference through the same balloon releasing model.The initial evaluation results show as follows: 1) The good consistence of velocity and wind direction exists between secondary radar and GPS system;2) The velocity of secondary radar has better performance than wind direction;3) The velocity of secondary radar slightly increases with height and velocity,but still keep high precision;4) The wind direction error of secondary radar has maximal value in middle upper-air layer,relative smaller value in low upper-air layer,and minimal value above 16km upper-air layer,which is significantly improved than others upper-air layers Also the wind direction of secondary radar has obvious good performance when velocity of secondary radar is higher than 16m/s. But we have to notice that secondary radar has relative poor stability,especially in low and middle upper-air layers,so in future satellite navigation wind-finding mechanism should be developed for Chinese wind-finding operation in order to improve Chinese wind-finding capability.
出处
《成都信息工程学院学报》
2011年第1期91-97,共7页
Journal of Chengdu University of Information Technology
基金
国家自然科学基金资助项目(40975064)
关键词
气象探测
二次雷达
测风
性能评估
比对
meteorological observation
secondary radar
wind-finding
performance evaluation
intercomaprison
