Study on adaptability of GPS ionospheric error correction models

摘要

Figure 7 [Figure omitted. See Article Image.] shows mean ionospheric delay along the longitude line of 115° E at midday time in 30 days; Figure 8 [Figure omitted. See Article Image.] shows mean ionospheric delay along the latitude line of 25° N at midday time in 30 days. Figure 7 [Figure omitted. See Article Image.] shows that ionospheric delay is largest around equator and smallest in the areas of two poles, which shows a symmetry. Figure 8 [Figure omitted.