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Preliminary results of DCB C1-C2 in a GPS system

机译：GPS系统中DCB C1-C2的初步结果

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The paper present the results of studies related to estimation of instrumental biases C1-C2 in a GPS system. The data from LAMA and WROC reference stations in Poland were used in numerical processing, using the least squares method in SciTEC software. The Differential Code Biases C1-C2 were determined based on the Geometry Free linear combination with temporal resolution of 2 hours, separately for each station. The first results of the DCB C1-C2 were compared with theoretical values based on monthly CODE'S product. Moreover, the theoretical values of SDCB C1-C2 include many anomalies and the reference sum of SDCB C1-C2 is not equal to 0. The standard deviation of the mean difference between CODE and each station is about ±3 ns. The magnitude order of SDCB C1-C2 for each station for each day is less than ±10 ns with the standard deviation less than ±0.5 ns. The average values of SDCB C1-C2 for each station were determined based on a RINEX file from 6 measurements days. The SDCB C1-C2 from each station have got similar trends, except to the bias of SVN1, where the difference is more than 2 ns. Generally, the mean difference of SDCB C1-C2 between the LAMA and WROC solution is about ±1 ns. The RDCB C1-C2 are more stable than the SDCB C1-C2, with a daily repeatability about 0.7 ns. The characteristic of RDCB C1-C2 for each station over a few days is very irregular, with the range of about±1.5 ns.
机译：本文介绍了与GPS系统中仪器偏差C1-C2的估计有关的研究结果。来自波兰LAMA和WROC参考站的数据用于数值处理，使用SciTEC软件中的最小二乘法。差分代码偏移C1-C2是根据每个站点分别具有2小时时间分辨率的无几何线性组合确定的。 DCB C1-C2的最初结果与基于每月CODE'S产品的理论值进行了比较。此外，SDCB C1-C2的理论值包含许多异常，并且SDCB C1-C2的参考和不等于0。CODE与每个站之间的平均差的标准偏差约为±3 ns。每个站点每天的SDCB C1-C2的量级顺序小于±10 ns，标准偏差小于±0.5 ns。每个站的SDCB C1-C2平均值是根据RINEX文件从6个测量日中得出的。每个站的SDCB C1-C2都有相似的趋势，除了SVN1的偏差大于2 ns。通常，LAMA和WROC解决方案之间SDCB C1-C2的平均差约为±1 ns。 RDCB C1-C2比SDCB C1-C2更稳定，日重复性约为0.7 ns。几天中每个站点的RDCB C1-C2的特性非常不规则，范围约为±1.5 ns。

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