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申请号:201911049654.2 公开号:CN110907959A 主分类号:G01S19/25
摘要:【中文】本发明公开了一种基于GIM地图的GNSS接收机硬件延迟的快速解算方法,包括步骤如下:利用GNSS观测台网进行同步观测,得到考察时段内的观测数据;采用电离层VTEC测量方法,结合观测数据和电离层薄层模型,得到硬件误差与电离层VTEC关系式;获取考察时段内的观测台网上空的全球电离图GIM数据的电离层TEC数据作为VTEC定标参考;对考察时段内的GNSS观测台网的所有接收机,采用GIM数据和最小二乘残差估计的方法进行接收机和卫星的硬件延迟求解:利用步骤S2、步骤S3得到的VTEC进行最小二乘法来计算接收机硬件延迟误差DCB和台站上空的垂直TEC,其中在计算接收机延迟误差时,采用对日常电离层延迟残差的平均值来进行额外约束。 【EN】The invention discloses a GNSS receiver hardware delay rapid resolving method based on a GIM map, which comprises the following steps: synchronously observing by utilizing a GNSS observation platform network to obtain observation data in an investigation period; obtaining a relation between a hardware error and an ionosphere VTEC by adopting an ionosphere VTEC measuring method and combining observation data and an ionosphere thin layer model; acquiring ionized layer TEC data of global ionization map GIM data over an observation station network in an investigation period as VTEC calibration reference; for all receivers of the GNSS observation station network in the investigation period, adopting a method of GIM data and least square residual estimation to carry out hardware delay solution of the receivers and satellites: and calculating a receiver hardware delay error DCB and a vertical TEC above the station by using a least square method through the VTEC obtained in the steps S2 and S3, wherein when the receiver delay error is calculated, an average value of daily ionospheric delay residuals is adopted to carry out additional constraint.
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