A global combined real-time ionospheric method based on sliding window initial point dSTEC is proposed. The initial reference epoch in the initial point dSTEC of sliding window will change as the arc length reaches the set threshold of sliding window. Compared with the existing initial period dSTEC method, the influence of low altitude Angle satellite observation noise and multipath effect on the initial point dSTEC of sliding window will be significantly reduced. At the same time, the sliding window threshold is set in the calculation of initial sliding window point dSTEC, which further weakens the influence of correlation between phase TEC epoch. The real-time ionospheric data of CAS can be obtained from IGS Caster (product.igs-ip.net:2101). The corresponding mount points are IONO01IGS1(IGs-SSR) and IONO01IGS0(RTCM-SSR), and the data interval is 1 minute.
Product Standard
| Specification | Description |
|---|---|
| Provider | Chinese Academy of Sciences(CAS) |
| Data Input | Global real-time GNSS Benchmark Station Data (30 stations) |
| Product Input | CAS, UPC, CNES, WHU real-time ionospheric products |
| Weight processing | Real-time slide window initial point dSTEC (SW-dSTEC) |
| Coverage Area | -90°N–90°N, 180°W–180°E |
| Thin layer height | 450Km |
| Data interval | 1 minute |
| Precision Marking | none |
| Real-time Acquisition | product.igs-ip.net:2101 IONO01IGS1(IGS-SSR), IONO01IGS0(RTCM-SSR) |
| Data Download | ftp://ftp.gipp.org.cn/product/ionex/ |
| Reference | Wang et al. 2022 |