三频GNSS电离层周跳处理

在分析三频无几何无电离层组合特性的基础上,构造了3个线性无关的三频无几何无电离层组合作为周跳探测检验量,以解决电离层延迟活跃期时的周跳处理问题。为保证周跳修复的准确性,提出采用两次历元差分后的电离层残差值对周跳修复值进行验证与确认。通过高电离层延迟条件下的三频观测数据对本文算法进行了验证分析。试验结果表明,该方法可实现高电离层延迟条件下对周跳的探测与修复,并可适用于三频实时、非差导航定位的周跳处理。

Ionospheric Cycle Slip Processing in Triple-frequency GNSS

A new method based on three linear independence geometry‐free and ionosphere‐free (GIF) combinations to detect and repair cycle‐slip is advanced to finishing the cycle slip processing under the higher ionospheric activity .In order to ensure that the cycle slip correction is accurate ,the repair value is validated by a second‐order ,time‐difference phase ionospheric residual (STPIR) combination .And then , this method is validated and analyzed by using the triple‐frequency data with higher ionospheric error .The experiment results show that this method can nearly detect and repair all the cycle slip except several insensitive cycle slip under high ionospheric activity .So this method can be used to cycle slip procession in triple‐frequency precise point position and other un‐differenced dynamic navigation and position .