Global Ionosphere Maps of vertical electron content combined in real-time from the RT-GIMs of CAS, CNES, UPC-IonSAT, and WHU International GNSS Service (IGS) centers (from Dec 1, 2020, to March 1, 2021)
收藏资源简介：
The datasets consists on 91 daily files, in IONEX format (http://ftp.aiub.unibe.ch/ionex/draft/ionex11.pdf) , corresponding to three months of global ionospheric maps (GIM) of vertical total electron content (VTEC) computed in real-time from the assessed and combined real-time GIMs generated by four analysis centers. Indeed, the Real-Time Working Group (RTWG) of International GNSS Service (IGS) is dedicated to providing high-quality data, high-accuracy products for Global Navigation Satellite System (GNSS) navigation, positioning, timing, and Earth observations. As one of the important part of real-time products, the IGS combined Real-Time Global Ionosphere Map (RT-GIM) have been generated by real-time weighting technique with the help of RT-GIMs from IGS real-time ionosphere centers including the Chinese Academy of Sciences (CAS), Centre National d’Etudes Spatiales (CNES), Universitat Politècnica de Catalunya (UPC), and Wuhan University (WHU). Compared with IGS rapid Global Ionosphere Maps (GIMs) (corg, ehrg, emrg, esrg, igrg, jprg, uhrg, uprg, uqrg, whrg) and IGS final combined GIM (igsg), the IGS combined RT-GIM (irtg) is equivalent to the post-processed GIMs and even better than some rapid GIMs. The IGS RT-GIMs are reliable sources of real-time global VTEC information and has great potential for real-time applications including range error correction for transionospheric radio signals (such as GNSS positioning, search and rescue, air traffic, radar altimetry, and radioastronomy), the monitoring of space weather (such as geomagnetic and ionospheric storms, ionospheric disturbance) and detection of natural hazards on a global scale (such as hurricanes/typhoons, ionospheric anomalies associated with earthquakes)
本数据集包含91个每日数据文件，格式为IONEX（格式规范详见http://ftp.aiub.unibe.ch/ionex/draft/ionex11.pdf），涵盖基于四家分析中心生成的经评估与融合的实时全球电离层图（Global Ionosphere Map，GIM）实时计算得到的三个月垂直总电子含量（Vertical Total Electron Content，VTEC）全球电离层图序列。 国际GNSS服务（International GNSS Service，IGS）实时工作组（Real-Time Working Group，RTWG）致力于为全球导航卫星系统（Global Navigation Satellite System，GNSS）的导航、定位、授时与地球观测领域提供高质量数据与高精度产品。作为IGS实时产品的重要组成部分，IGS融合实时全球电离层图（Real-Time Global Ionosphere Map，RT-GIM）采用实时加权技术生成，其数据融合了来自IGS实时电离层中心的RT-GIM数据，这些中心包括中国科学院（Chinese Academy of Sciences，CAS）、法国国家太空研究中心（Centre National d’Etudes Spatiales，CNES）、加泰罗尼亚理工大学（Universitat Politècnica de Catalunya，UPC）以及武汉大学（Wuhan University，WHU）。 相较于IGS快速全球电离层图（GIM）（标识包括corg、ehrg、emrg、esrg、igrg、jprg、uhrg、uprg、uqrg、whrg）与IGS最终融合GIM（igsg），IGS融合实时RT-GIM（irtg）的精度可与后处理GIM相媲美，甚至优于部分快速GIM产品。IGS RT-GIM是可靠的实时全球VTEC信息源，在诸多实时应用场景中具备显著潜力，包括跨电离层无线电信号的测距误差修正（如GNSS定位、搜救、空中交通管制、雷达测高与射电天文学研究）、空间天气监测（如地磁暴与电离层暴、电离层扰动）以及全球尺度自然灾害的探测（如飓风/台风、与地震相关的电离层异常）
