卫星截止高度角和系统组合对GNSS PPP精度影响研究
发布时间：2018-10-26 06:31
【摘要】：为研究卫星截止高度角和GNSS系统组合对PPP精度的影响,对部分MGEX观测站10d的实测数据分别进行24h的精密单点定位数据处理,分析了5°~55°不同截止高度角下单系统GPS、BDS、GLONASS、双系统GPS/BDS、GPS/GLONASS、GLONASS/BDS、三系统GPS/BDS/GLONASS组合的可见卫星数以及定位精度。在确定的系统组合情况下,对不同截止高度角的定位精度分析表明,单系统定位的截止高度角应设置在30°以下,双系统应设置在40°以下,多系统应设置在55°以下;所有组合方式的最优截止高度角均在7°~15°;在确定的卫星截止高度角情况下,对不同系统组合的定位精度分析表明,当截止高度角小于40°时,定位精度最高的为GPS/BDS/GLONASS,最低的为BDS,其他系统组合居中;当截止高度角小于25°时,系统组合对定位精度的影响较为明显,随着截止高度角的增大(从25°到40°时),这种影响逐渐减小,当截止高度角进一步增大至40°时,主要依靠BDS卫星定位,能够进行定位的系统组合定位精度基本相当。
[Abstract]:In order to study the effect of satellite cutoff altitude angle and GNSS system combination on PPP accuracy, the data of 10 days measured at some MGEX stations were processed with precise single point positioning data for 24 hours, and the GPS,BDS,GLONASS, system with 5 掳~ 55 掳different cut-off height angles was analyzed. The number of visible satellites and positioning accuracy of GPS/BDS/GLONASS combination of dual system GPS/BDS,GPS/GLONASS,GLONASS/BDS, three systems. In the case of determined system combination, the positioning accuracy of different cut-off height angles shows that the cutoff height angle of single system positioning should be below 30 掳, that of double system should be below 40 掳, and that of multi-system should be less than 55 掳. The optimal cut-off height angle of all combinations is 7 掳~ 15 掳; When the cut-off altitude angle of satellite is determined, the positioning accuracy of different system combinations is analyzed. The results show that when the cut-off altitude angle is less than 40 掳, the highest positioning accuracy is GPS/BDS/GLONASS, and the lowest one is BDS, other system combination. When the cut-off height angle is less than 25 掳, the effect of system combination on positioning accuracy is obvious. With the increase of cut-off height angle (from 25 掳to 40 掳), the effect decreases gradually, and when the cut-off height angle increases further to 40 掳, Mainly rely on BDS satellite positioning, the positioning system combination positioning accuracy is basically the same.
【作者单位】： 中国矿业大学环境与测绘学院;中国矿业大学江苏省资源环境信息工程重点实验室;
【基金】：国家自然科学基金(41674008,41604006) 高等学校博士学科点专项科研基金(20130095110022) 江苏省普通高校研究生科研创新计划项目(SJCX17_0522)~~
【分类号】：P228
本文编号：2294856
[Abstract]:In order to study the effect of satellite cutoff altitude angle and GNSS system combination on PPP accuracy, the data of 10 days measured at some MGEX stations were processed with precise single point positioning data for 24 hours, and the GPS,BDS,GLONASS, system with 5 掳~ 55 掳different cut-off height angles was analyzed. The number of visible satellites and positioning accuracy of GPS/BDS/GLONASS combination of dual system GPS/BDS,GPS/GLONASS,GLONASS/BDS, three systems. In the case of determined system combination, the positioning accuracy of different cut-off height angles shows that the cutoff height angle of single system positioning should be below 30 掳, that of double system should be below 40 掳, and that of multi-system should be less than 55 掳. The optimal cut-off height angle of all combinations is 7 掳~ 15 掳; When the cut-off altitude angle of satellite is determined, the positioning accuracy of different system combinations is analyzed. The results show that when the cut-off altitude angle is less than 40 掳, the highest positioning accuracy is GPS/BDS/GLONASS, and the lowest one is BDS, other system combination. When the cut-off height angle is less than 25 掳, the effect of system combination on positioning accuracy is obvious. With the increase of cut-off height angle (from 25 掳to 40 掳), the effect decreases gradually, and when the cut-off height angle increases further to 40 掳, Mainly rely on BDS satellite positioning, the positioning system combination positioning accuracy is basically the same.
【作者单位】： 中国矿业大学环境与测绘学院;中国矿业大学江苏省资源环境信息工程重点实验室;
【基金】：国家自然科学基金(41674008,41604006) 高等学校博士学科点专项科研基金(20130095110022) 江苏省普通高校研究生科研创新计划项目(SJCX17_0522)~~
【分类号】：P228
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