多普勒频率数据质量评估方法研究

Study on Evaluation Method for Doppler Shift Data Quality

针对双频卫星导航接收机的多普勒频率数据,提出了一套数据质量评估方法,包括评价对象、评价指标和评价准则。该方法通过对卫星导航的多普勒频率数据的测量误差的分析,得到了多普勒频率数据质量的综合评价对象。从异常值、系统误差和随机误差的角度分析测量误差,建立各自的评价指标和评价准则。最后,对全球定位系统监测站的多普勒频率测量数据进行了评价,结果显示同一接收机对不同卫星的测量数据的质量存在差异,尤其在异常值检测方面效果显著,可以扩展到其它卫星导航数据质量的评估。

In order to evaluate the quality of Doppler Shift data,this paper proposed a method for dual frequency receiver data quality evaluation include evaluation object,indicator and criteria.The method figures out the comprehensive evaluation object for Doppler shift though the analysis of systemic measurement error.According the corresponding characteristics of outlier,system error and random error,respectively built the evaluation indicator and criteria.By analyzing and evaluation Global Position System observed data,the test indicates the difference among the different satellites data,especially for outlier detection,and this method can expand for other navigation data quality evaluation.