Abstract
差分码偏差是北斗卫星导航系统（BDS）在高精度定位和电离层建模中需精确处理的系统误差之一.利用MGEX发布的2017年全年和2018年6月的BDS卫星的差分码偏差数据，比较分析了DLR和CAS分别解算的BDS卫星差分码偏差的日解值、月平均值和稳定性的变化特性.分析结果表明，DLR与CAS估算的BDS卫星差分码偏差值差异不大，具有较好的一致性；2017年CAS估算的BDS卫星C2I-C6I差分码偏差稳定性略优于DLR，C2I-C7I差分码偏差稳定性与DLR相当，且均具有较高稳定性；2018年6月DLR C2I-C6I差分码偏差月平均值稳定性优于CAS；C2I-C7I差分码偏差的稳定性明显优于C2I-C6I差分码偏差，卫星差分码偏差月平均值稳定性优于日解值稳定性.
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