安卓手机终端原始GNSS观测数据质量分析  

Quality analysis on raw GNSS measurements of Android mobile terminals

作　　者：陈波[1] 高成发[1] 刘永胜 陆轶材 CHEN Bo;GAO Chengfa;LIU Yongsheng;LU Yicai(School of Transportation,Southeast University,Nanjing 211189,China)

机构地区：[1]东南大学交通学院

出　　处：《导航定位学报》2019年第3期87-95,共9页Journal of Navigation and Positioning

摘　　要：为了弥补当前手机端原始GNSS观测数据的定性质量分析相关研究较少的不足,提出通过将手机与测地型接收机同时同地点进行观测的方法来对比分析手机端原始GNSS观测值的数据质量,被评价的手机品牌有华为P10、华为荣耀9和小米8。实验结果表明:大部分智能手机能够观测到单频伪距和载波相位数据,有些最新产品能接收到双频GNSS数据,观测到的GPS和GLONASS卫星数目和测地型接收机观测结果接近;手机端观测有时会出现频繁的信号失锁现象,且载波观测值存在大量的粗差或原因不明确的系统误差;手机端同时刻伪距观测值和载波观测值变化率不一致,判断其原因是伪距和载波观测采用不同的时钟,造成二者钟速之差在观测时段内缓慢变化;手机伪距观测值中误差为4~10 m,BDS卫星伪距观测值精度高于其他卫星;以载波观测值变化率平滑性作为评价指标,手机端载波观测值数据质量比测地型接收机差4~6倍。In order to supplement the insufficiency of studying on the qualitative analysis of raw GNSS observations of mobile phones,the paper proposed to comparatively analyze the raw GNSS measured data quality of mobile terminals by observing with smart phones and common GNSS receivers simultaneously at the same place,taking the samples of Huawei P10,Huawei Honor 9 and Xiaomi 8 into accout.Experimental result showed that:most smartphones could receive single-frequency pseudorange and carrier phase,some of the latest products could receive dual-band raw GNSS measurements,and the number of observed GPS and GLONASS satellites would be close to that by GNSS receivers;there would be occasional frequent signal loss in mobile phone observations,and a large number of faults or systematic errors with unclear causes in carrier phase observations;the change rates of pseudo-range observation and carrier phase observation would be inconsistent,which could be due to the different clocks used by the two observations leading to the slow change of the clock rate difference between the two clocks during the observation period;at the same time,the root mean square error in the pseudo-range observations of mobile phones would be 4~10 m,and the accuracy of pseudo-range observations of BDS satellites would be better than that of other GNSS satellites;moreover,taking the change rate smoothness of carrier phase observation as the evaluation index,the data quality of mobile carrier phase observation would be 4~6 times worse than that of the common GNSS receivers.

关 键 词：安卓手机 质量分析 伪距观测值 载波观测值 变化率 

分 类 号：P228[天文地球—大地测量学与测量工程]