高阶电离层在GNSS对流层参数估计的影响  

The effects of higher order ionosphere on GNSS tropospheric parameters estimation

作　　者：魏僮 阎卫东 马健[1] WEI Tong;YAN Weidong;MA Jian(School of Transportation and Geomatics Engineering,Shenyang Jianzhu University,Shenyang 110168,China)

机构地区：[1]沈阳建筑大学交通与测绘工程学院,沈阳110168

出　　处：《全球定位系统》2023年第1期83-97,共15页Gnss World of China

摘　　要：为了研究高阶电离层在全球卫星导航系统(GNSS)对流层参数估计中的影响.在太阳活动平静期和活跃期,分别选择亚太地区的8个MGEX (Multi-GNSS Experiment)跟踪站.通过GAMIT10.71分析了高阶电离层延迟在北斗二号(BDS-2)、北斗三号(BDS-3)、GPS、GLONASS和Galileo对流层参数估计的影响.实验结果表明:太阳活动平静期,高阶电离层延迟对于Galileo的对流层天顶总延迟(ZTD)、可降水量(PW)和南北梯度(NSgrad)影响最大分别达到7.70 mm、1.26 mm和6.77 mm;高阶电离层延迟对于GLONASS的对流层东西梯度(EWgrad)影响最大达到9.30 mm.太阳活动活跃期,高阶电离层在GNSS对流层参数估计中产生了更大影响.其中,高阶电离层延迟对于BDS-2的ZTD和PW影响最大分别达到21.30 mm和3.49 mm;高阶电离层延迟对于Galileo的对流层NSgrad影响最大达到19.87 mm;高阶电离层延迟对于GLONASS的对流层EWgrad影响最大达到了21.21 mm.实验结果进一步表明:高阶电离层在GNSS对流层PW估计的影响较小;ZTD、NSgrad和EWgrad影响则较大.高阶电离层延迟对于BDS-3和GPS对流层参数估计影响较小;Galileo、BDS-2和GLONASS影响则较大.In order to study the influence of the high-order ionosphere on the Global Navigation Satellite System(GNSS)tropospheric parameter estimation eight MGEX(Multi GNSS Experience)tracking stations in the Asia Pacific region were selected during the quiet and active periods of solar activity The influence of high-order ionosphere delay on tropospheric parameter estimation in Beidou-2 Navigation Satellite System(BDS-2), Beidou-3 Navigation Satellite System(BDS-3), Global Positioning System(GPS), Global Navigation Satellite System(GLONASS)and Galileo is analyzed through GAMIT10.71 The experimental results show that during the quiet period of solar activity, the maximum influence of high-order ionosphere delay on Galileo’s zenith total delay(ZTD), precipitable water(PW)and north south gradient(NSgrad)is7.70 mm, 1.26 mm and 6.77 mm respectively;The maximum effect of high-order ionosphere delay on the tropospheric east west gradient(EWgrad)of GLONASS is 9.30 mm during the active solar period, high-order ionosphere has greater influence on the tropospheric parameter estimation of GNSS among them, the maximum impact of high-order ionosphere delay on the tropospheric ZTD and PW of BDS-2 is 21.30 mm and 3.49 mm respectively;The maximum influence of high-order ionosphere delay on the tropospheric NSgrad of GLONASS is 21.21 mm The experimental results further show that high-order ionosphere has little influence on the tropospheric PW estimation of GNSS;ZTD,order ionosphere delay has little effect on BDS-3 and GPS tropospheric parameter estimation;Galileo, BDS-2 and GLONASS have greater influence.

关 键 词：高阶电离层延迟 全球卫星导航系统(GNSS) 太阳活动平静期 太阳活动活跃期 对流层参数估计 

分 类 号：P22.1[天文地球—大地测量学与测量工程] P228.9[天文地球—测绘科学与技术]