摘要
利用2014年广东阳江和青藏高原外场观测中多种探测仪器的观测资料,对比了灾害天气国家重点实验室与航天科工23所联合研制的固态毫米波雷达三种探测模式最小可测回波强度、可测液态水(冰水)含量、观测同一目标时回波强度的差异以及与K波段微降水雷达回波强度的差异等。结果表明:(1)毫米波雷达不同模式最小可测回波强度差异与理论差异一致,边界层模式和降水模式能观测近地面全部层云和积云,卷云能观测5km高度冰水含量在0.0007 g·m^(-3)以上的卷云,随着高度上升探测能力有所下降;(2)毫米波雷达使用不同模式观测同一目标时,不同观测模式宏观回波强度一致,大部分差异不超过3.5 dB;(3)K波段微降水雷达和Pasivel2激光雨滴谱仪的近地面回波强度一致,毫米波雷达与K波段微降水雷达存在系统差异。
Based on the data of several instruments applied in the 2014 Yangjiang and Tibetan experiments, the sensitivity, liquid water content （LWC or ice water content, IWC） can be detected and difference between different mode echoes of a new solid-state millimeter wave radar （SMMR） constructed by State Key Laboratory of Severe Weather （LaSW） and 23th Institute of Aerospace Science and Technology are con- trasted. Also, difference between this radar and micro-rain radar （MRR） echo is contrasted. The results show： （1） differences between different modes of SMMR are in reasonable agreement with theoretical resuits. All the status and cumulus in near-surface layer can be observed by boundary layer mode and precipitation mode. Cirrus mode can observe cirrus which ice water content is over 0. 0007 g·m^-3. Observation capability of all three modes decreased with the increase of height. （2） Differentials between three mode echoes are mostly less than 3.5 dB. （3） MRR echo and Pasivel2 laser optical disdrometer echo are almost same, system difference existed between MRR and SMMR echo.
出处
《气象》
CSCD
北大核心
2016年第7期790-798,共9页
Meteorological Monthly
基金
国家自然科学基金项目(91337103)资助
