According to the result of ionospheric delay , ionosphere is uneven and therefore it is suitable to simulate the ionospheric delay of an area instead of computing with ionospheric model.

• 利用电离层延迟分析了电离层的基本特性,试验表明由于电离层电子密度的不均匀,采用实测数据模拟区域电离层延迟模型比采用经验模型计算更符合实际;