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- 2017
GNSS数据处理时空参数的相关性
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Abstract:
卫星轨道、钟差以及测站坐标等是全球导航卫星系统定位（global navigation satellite system，GNSS）的核心参数，构成了卫星导航系统数据处理的时空基准。通过比较国际GNSS服务（International GNSS Service，IGS）不同数据分析中心提供的GNSS精密时空产品发现，各分析中心的轨道、钟差存在明显差异，并且轨道、钟差的相对偏差存在很强的相关性。针对该问题，讨论了GNSS卫星轨道、钟差的相关性问题，分析了轨道、钟差相对偏差的周期特性，并提取了周期项模型参数；建立改正模型，提高了不同分析中心产品的一致性；对时空基准周期性误差的原因进行了分析，并以参数降相关为出发点，对GNSS时空基准精度提升的方法提出了建议
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