偏航姿态对北斗精密单点定位的影响分析

发布时间：2018-07-01 10:29

本文选题：零偏模式 + 天线相位中心偏差　；参考：《测绘学报》2017年08期

【摘要】：当太阳相对于卫星轨道面的高度角较小时,北斗导航卫星将不会跟踪太阳位置,卫星姿态发生异常复杂的变化后一段时间内处于零偏模式。在此期间采用名义姿态将影响卫星天线相位中心偏差、相位缠绕等误差计算,进而使精密单点定位(PPP)参数估计和天顶对流层延迟估计出现偏差。研究表明,在北斗导航卫星处于零偏期间,采用名义姿态计算的相位缠绕、天线相位中心偏差中存在超过15cm的误差。在此期间的北斗卫星采用零偏姿态改正相位缠绕等误差,与采用名义姿态相比,动态PPP位置参数N、E、U的估计精度可以提高53.2%、54.2%、39.3%,静态PPP位置参数N、E、U的估计精度可以提高61.0%、72.3%、58.4%,天顶对流层延迟估计精度提高33.0%。
[Abstract]:When the altitude angle of the sun relative to the satellite orbital surface is small, the Beidou navigation satellite will not track the position of the sun, and the satellite attitude will be in a zero-offset mode for a period of time after the extremely complicated changes in the attitude of the satellite. During this period, the phase center deviation and phase winding error calculation of satellite antenna will be affected by nominal attitude, which will result in the deviation of precision single point positioning (PPP) parameter estimation and zenith tropospheric delay estimation. The results show that in the period of zero bias of Beidou navigation satellite, the error of antenna phase center deviation exceeds 15cm in the phase winding calculated by nominal attitude. During this period, the Beidou satellite uses zero bias attitude to correct the phase winding error, which is compared with the nominal attitude. The estimation accuracy of the dynamic PPP position parameter Nu ETU can be improved by 53.2and 54.2and by 39.3. The estimation accuracy of static PPP position parameter NPPP can be improved by 61.0 and 72.30.The accuracy of zenith tropospheric delay estimation can be improved by 33.0.
【作者单位】：武汉大学卫星导航定位技术研究中心;
【基金】：国家重点研发计划(2016YFB0800405) 福建省社会发展引导性资助项目(2016Y0002) 福建省测绘地理信息局科技创新资助项目(2016J01) 水利部公益性行业科研专项经费(201401072)~~
【分类号】：P228.1

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