The macro and micro cloud physics structures and their evolution with time are the core of describing cloud fields in essence.They are necessary atmospheric environment not only in aviation and spaceflight activities ...The macro and micro cloud physics structures and their evolution with time are the core of describing cloud fields in essence.They are necessary atmospheric environment not only in aviation and spaceflight activities but also for atmos- pheric radiation transfer and acid rain formation research.Unfortunately it is difficult to obtain an entire environmental cloud field by using observation methods directly.Thus,by use of computation physics method to build a cloud-system model may be an indispensable way for this topic.This paper presented a cloud-system model for this goal,and simu- lated a real case.The results of computation showed that the macro structure of the cloud field was better consistent with real observation,and the micro structure was fairly reasonable.The output of model could provide all the information about the cloud field:(1)size-distribution spectrum of hydrometeor particles (point),(2)vertical profile (line),(3)hori- zontal or vertical section of macro and micro parameters (surface),and (4)cloud cover,pattern of cloud and configura- tion of cloud,etc.(body).展开更多
针对当前电离层现报和预报数据精度不足、多源异构数据融合困难等问题,本文基于全球卫星导航系统(Global Navigation Satellite System,GNSS)和垂测观测数据,设计了一套电离层融合处理和预报系统。采用限带卡尔曼滤波模型,基于银河麒麟...针对当前电离层现报和预报数据精度不足、多源异构数据融合困难等问题,本文基于全球卫星导航系统(Global Navigation Satellite System,GNSS)和垂测观测数据,设计了一套电离层融合处理和预报系统。采用限带卡尔曼滤波模型,基于银河麒麟操作系统和云计算平台,利用容器云、高可用、分布式架构实现全球及中国周边区域电离层总电子含量(Total Electron Content,TEC)、F2层临界频率(Critical Frequency of the F2 Layer,foF2)及电子密度的高精度现报和预报。实验测试表明,该系统现报延迟约5 min、空间时间分辨率达到5°×2.5°×15 min,较传统数据处理方法有较大提升。系统支持三维电子密度可视化,为电离层研究、卫星导航修正、短波通信及地基雷达等应用提供可靠数据支撑,为无线电系统应用提供高精度、高时效的电离层环境信息服务。展开更多
基金the National Natural Science Foundation of China State Key Projects for Science and Technology during the 8th Five-Year Plan 85906-04-03
文摘The macro and micro cloud physics structures and their evolution with time are the core of describing cloud fields in essence.They are necessary atmospheric environment not only in aviation and spaceflight activities but also for atmos- pheric radiation transfer and acid rain formation research.Unfortunately it is difficult to obtain an entire environmental cloud field by using observation methods directly.Thus,by use of computation physics method to build a cloud-system model may be an indispensable way for this topic.This paper presented a cloud-system model for this goal,and simu- lated a real case.The results of computation showed that the macro structure of the cloud field was better consistent with real observation,and the micro structure was fairly reasonable.The output of model could provide all the information about the cloud field:(1)size-distribution spectrum of hydrometeor particles (point),(2)vertical profile (line),(3)hori- zontal or vertical section of macro and micro parameters (surface),and (4)cloud cover,pattern of cloud and configura- tion of cloud,etc.(body).
文摘针对当前电离层现报和预报数据精度不足、多源异构数据融合困难等问题,本文基于全球卫星导航系统(Global Navigation Satellite System,GNSS)和垂测观测数据,设计了一套电离层融合处理和预报系统。采用限带卡尔曼滤波模型,基于银河麒麟操作系统和云计算平台,利用容器云、高可用、分布式架构实现全球及中国周边区域电离层总电子含量(Total Electron Content,TEC)、F2层临界频率(Critical Frequency of the F2 Layer,foF2)及电子密度的高精度现报和预报。实验测试表明,该系统现报延迟约5 min、空间时间分辨率达到5°×2.5°×15 min,较传统数据处理方法有较大提升。系统支持三维电子密度可视化,为电离层研究、卫星导航修正、短波通信及地基雷达等应用提供可靠数据支撑,为无线电系统应用提供高精度、高时效的电离层环境信息服务。
