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- 2018
电离层延迟对单频GPS点的影响及改正方法研究
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Abstract:
电离层延迟是单频GPS地面沉降监测点的最主要误差源，如何削弱该误差的影响是提高单双频混合地面沉降监测系统精度的关键。采用中国广州南沙单双频混合GPS地面沉降监测网数据进行处理分析，结果表明，在低纬度地区即使基线较短，电离层延迟对单频GPS监测精度影响仍然较大，影响程度随基线长度增加而增大，而且在时间域上有明显的季节性变化规律：2、3月份与8、9月份电离层影响较为显著。利用双频点数据从观测值域对单频点电离层延迟误差进行改正，监测精度提高了57%，改善效果明显
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