BDS静态精密单点定位模糊度固定解精度分析
|
摘要
针对BDS单系统未校准相位延迟(UPD)估计以及不同时长精密单点定位(PPP)模糊度固定对定位精度影响的问题,该文选取56个测站估计UPD,利用未参与UPD计算的8个测站进行不同时长BDS静态PPP模糊度固定实验。结果表明:BDS星间单差宽巷和窄巷UPD在连续时段内具有一定的稳定性,其估计精度满足用于PPP模糊度固定要求。时长越短模糊度固定率越低。以IGS周解为参考值,不同时长模糊度固定解较浮点解三维定位精度均提高12%以上,时长越短模糊度固定解精度提高越显著。因此,模糊度固定是提高BDS PPP定位精度的重要手段。
Aiming at the problem of uncalibrated phase delays(UPD)estimation of BDS single system and the influence of PPP ambiguity resolution(AR)on positioning at different periods,this paper selected56 stations to estimate UPD,and 8 stations not involved in UPD calculation were used to conduct different periods static PPP AR.The results showed that BDS wide lane and narrow lane UPDs were stable for a continuous period of time,and theirs estimated accuracy could satisfy the requirements for PPP AR.As the periods became shorter,the rate of ambiguity resolution was lower.Compared to the float solutions,the accuracy improvement of the three-dimensional positioning by PPP AR at different periods was more than 12% with respect to the IGS weekly solutions,and the more significant accuracy improvement could be obtained at the shorter periods.Therefore,AR is an important means to improve the BDS PPP accuracy.
Aiming at the problem of uncalibrated phase delays(UPD)estimation of BDS single system and the influence of PPP ambiguity resolution(AR)on positioning at different periods,this paper selected56 stations to estimate UPD,and 8 stations not involved in UPD calculation were used to conduct different periods static PPP AR.The results showed that BDS wide lane and narrow lane UPDs were stable for a continuous period of time,and theirs estimated accuracy could satisfy the requirements for PPP AR.As the periods became shorter,the rate of ambiguity resolution was lower.Compared to the float solutions,the accuracy improvement of the three-dimensional positioning by PPP AR at different periods was more than 12% with respect to the IGS weekly solutions,and the more significant accuracy improvement could be obtained at the shorter periods.Therefore,AR is an important means to improve the BDS PPP accuracy.
引文
[1]GE M,GENDT G,ROTHACHER M,et al.Resolution of GPS Carrier-phase ambiguities in precise point positioning(PPP)with daily observations[J].Journal of Geodesy,2008,82(7):389-399.
[2]ZHANG X,LI P,GUO F.Ambiguity resolution in precise point positioning with hourly data for global single receiver[J].Advances in Space Research,2013,51(1):153-161.
[3]杨元喜.北斗卫星导航系统的进展、贡献与挑战[J].测绘学报,2010,39(1):1-6.(YANG Yuanxi.Progress,contribution and challenges of compass/BeiDou satellite navigation system[J].Acta Geodaetica et Cartographica Sinica,2010,39(1):1-6.)
[4]QU L,ZHAO Q,GUO J,et al.BDS/GNSS real-time kinematic precise point positioning with un-differenced ambiguity resolution[J].Lecture Notes in Electrical Engineering,2015,342:13-29.
[5]LI P,ZHANG X,GUO F.Ambiguity resolved precise point positioning with GPS and BeiDou[J].Journal of Geodesy,2016,91:1-16.
[6]LIU Y,YE S,SONG W,et al.Integrating GPS and BDS to shorten the initialization time for ambiguityfixed PPP[J].GPS Solutions,2017,21(2):333-343.
[7]WANG M,CHAI H,LI Y.Performance analysis of BDS/GPS precise point positioning with undifferenced ambiguity resolution[EB/OL].[2018-06-10].https://www.researchgate.net/publication/313405909_.
[8]LI B.Review of triple-frequency GNSS:ambiguity resolution,benefits and challenges[J].Journal of Global Positioning Systems,2018,16(1):1.
[9]LI P,ZHANG X,GE M,et al.Three-frequency BDSprecise point positioning ambiguity resolution based on raw observables[J].Journal of Geodesy,2018(5):1-13.
[10]刘帅.模糊度固定解PPP/INS紧组合理论与方法[D].郑州:信息工程大学,2016.(LIU Shuai.Theories and methods in tight integration of ambiguity-fixed PPPand INS[D].Zhengzhou:PLA Information Engineering University,2016.)
[11]GENG J,MENG X,DODSON A H,et al.integer ambiguity resolution in precise point positioning:method comparison[J].Journal of Geodesy,2010,84(9):569-581.
[12]李星星.GNSS精密单点定位及非差模糊度快速确定方法研究[D].武汉:武汉大学,2013.(LI Xingxing.Rapid ambiguity resolution in GNSS precise point positioning[D].Wuhan:Wuhan University,2013.)
[13]GENG J,MENG X,TEFERLE F N,et al.Performance of precise point positioning with ambiguity resolution for 1-to 4-hour observation periods[J].Survey Review,2010,42(316):155-165.
[14]WANNINGER L,BEER S.BeiDou satellite-induced code pseudorange variations:diagnosis and therapy[J].GPS Solutions,2015,19(4):639-648.
[15]楼益栋,龚晓鹏,辜声峰,等.北斗卫星伪距码偏差特性及其影响分析[J].武汉大学学报(信息科学版),2017,42(8):1040-1046.(LOU Yidong,GONG Xiaopeng,GU Shengfeng,et al.The characteristic and effect of code bias variations of BeiDou[J].Geomatics and Information Science of Wuhan University,2017,42(8):1040-1046.)
[2]ZHANG X,LI P,GUO F.Ambiguity resolution in precise point positioning with hourly data for global single receiver[J].Advances in Space Research,2013,51(1):153-161.
[3]杨元喜.北斗卫星导航系统的进展、贡献与挑战[J].测绘学报,2010,39(1):1-6.(YANG Yuanxi.Progress,contribution and challenges of compass/BeiDou satellite navigation system[J].Acta Geodaetica et Cartographica Sinica,2010,39(1):1-6.)
[4]QU L,ZHAO Q,GUO J,et al.BDS/GNSS real-time kinematic precise point positioning with un-differenced ambiguity resolution[J].Lecture Notes in Electrical Engineering,2015,342:13-29.
[5]LI P,ZHANG X,GUO F.Ambiguity resolved precise point positioning with GPS and BeiDou[J].Journal of Geodesy,2016,91:1-16.
[6]LIU Y,YE S,SONG W,et al.Integrating GPS and BDS to shorten the initialization time for ambiguityfixed PPP[J].GPS Solutions,2017,21(2):333-343.
[7]WANG M,CHAI H,LI Y.Performance analysis of BDS/GPS precise point positioning with undifferenced ambiguity resolution[EB/OL].[2018-06-10].https://www.researchgate.net/publication/313405909_.
[8]LI B.Review of triple-frequency GNSS:ambiguity resolution,benefits and challenges[J].Journal of Global Positioning Systems,2018,16(1):1.
[9]LI P,ZHANG X,GE M,et al.Three-frequency BDSprecise point positioning ambiguity resolution based on raw observables[J].Journal of Geodesy,2018(5):1-13.
[10]刘帅.模糊度固定解PPP/INS紧组合理论与方法[D].郑州:信息工程大学,2016.(LIU Shuai.Theories and methods in tight integration of ambiguity-fixed PPPand INS[D].Zhengzhou:PLA Information Engineering University,2016.)
[11]GENG J,MENG X,DODSON A H,et al.integer ambiguity resolution in precise point positioning:method comparison[J].Journal of Geodesy,2010,84(9):569-581.
[12]李星星.GNSS精密单点定位及非差模糊度快速确定方法研究[D].武汉:武汉大学,2013.(LI Xingxing.Rapid ambiguity resolution in GNSS precise point positioning[D].Wuhan:Wuhan University,2013.)
[13]GENG J,MENG X,TEFERLE F N,et al.Performance of precise point positioning with ambiguity resolution for 1-to 4-hour observation periods[J].Survey Review,2010,42(316):155-165.
[14]WANNINGER L,BEER S.BeiDou satellite-induced code pseudorange variations:diagnosis and therapy[J].GPS Solutions,2015,19(4):639-648.
[15]楼益栋,龚晓鹏,辜声峰,等.北斗卫星伪距码偏差特性及其影响分析[J].武汉大学学报(信息科学版),2017,42(8):1040-1046.(LOU Yidong,GONG Xiaopeng,GU Shengfeng,et al.The characteristic and effect of code bias variations of BeiDou[J].Geomatics and Information Science of Wuhan University,2017,42(8):1040-1046.)