粗差拟准检定方法探查网络RTK模糊度
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摘要
为了提高网络RTK基准站间模糊度检验和修正的精度,该文提出用粗差拟准检定(QUAD)方法来探测错误固定的模糊度:将固定错误的模糊度判定为观测值的粗差,并对粗差准确定位定值,最后根据模糊度的波长计算模糊度的大小。实验结果表明当少量模糊度出现纳伪错误时,该方法可以实时探测并修正错误固定的模糊度。
In order to improve the validation and correction accuracy of ambiguity for RTK reference stations,the paper proposed a method of detecting the fixed ambiguity based on QUasi-Accurate Detection of gross errors(QUAD):the wrongly fixed ambiguity was judged as gross errors of the observations,and the location and values of the errors were accurately determined;finally the integer cycles were obtained according to the wavelength of ambiguity.Experimental result showed that the method could realized the real-time detection and correction of the wrongly fixed ambiguity for the case of a small amount of ambiguities with pseudo errors.
In order to improve the validation and correction accuracy of ambiguity for RTK reference stations,the paper proposed a method of detecting the fixed ambiguity based on QUasi-Accurate Detection of gross errors(QUAD):the wrongly fixed ambiguity was judged as gross errors of the observations,and the location and values of the errors were accurately determined;finally the integer cycles were obtained according to the wavelength of ambiguity.Experimental result showed that the method could realized the real-time detection and correction of the wrongly fixed ambiguity for the case of a small amount of ambiguities with pseudo errors.
引文
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[2]唐卫明,刘经南,施闯,等.三步法确定网络RTK基准站双差模糊度[J].武汉大学学报·信息科学版,2007,32(4):305-308.
[3]陈永奇.一种检验GPS整周模糊度解算有效性的方法[J].武汉测绘科技大学学报,1997,22(4):342-345.
[4]王胜利,王庆,潘树国,等.基于抗差估计的网络RTK基站双差模糊度检验与修正方法[J].中国惯性技术学报,2012(6):14.
[5]欧吉坤.粗差的拟准检定法(QUAD法)[J].测绘学报,1999,28(1):15-20.
[6]张正禄,张松林,罗年学,等.多维粗差定位与定值的算法研究及实现[J].武汉大学学报·信息科学版,2003,28(4):400-404.
[7]高星伟,刘经南,葛茂荣.网络RTK基准站间基线单历元模糊度搜索方法[J].测绘学报,2002,31(4):305-309.
[8]LI T,WANG J.Some remarks on GNSS integer ambiguity validation methods[J].Survey Review,2012,44(326):230-238.
[9]FREI E,BEUTLER G.Rapid static positioning based on the fast ambiguity resolution approach FARA:theory and first results[J].Manuscript Geodetic,1990,15(6):325-356.
[10]WANG J,STEWART M P,TSAKIRI M.A discrimination test procedure for ambiguity resolution on-thefly[J].Journal of Geodesy,1998,72(11):644-653.
[11]TIBERIUS C,DE JONGE PJ.Fast positioning using the LAMBDA method[C]//Proceedings DSNS-95,1995,30(8).
[12]VERHAGEN S.The GNSS integer ambiguities:estimation and validation:PhD thesis[D].Delft:Publications on Geodesy,Netherland Geodetic Commission,2005.
[13]伍岳,邱蕾.网络RTK模式下多频载波相位观测值解算整周模糊度[J].测绘工程,2013,22(4):1-4.
[14]CHEN H Y,RIZOS C,HAN S.An instantaneous ambiguity resolution procedure suitable for medium-scale GPS reference station networks[J].Survey Review,2004,37(291):396-410.
[15]TEUNISSEN P J G,DE JONGE P J,Tiberius C.Performance of the LAMBDA method for fast GPS ambiguity resolution[J].Navigation,1997,44(3):373-383.
[16]VERHAGEN S.Integer ambiguity validation:an open problem?[J].GPS solutions,2004,8(1):
[17]HUBER P J.Robust statistics[M].Springer Berlin Heidelberg,2011.
[18]NEREM R S,LARSON K M.Global Positioning System,theory and practice[J].Eos,Transactions American Geophysical Union,2001,82(33):365-365.
[19]鄢子平,丁乐乐,黄恩兴,等.网络RTK参考站间模糊度固定新方法[J].武汉大学学报·信息科学版,2013,38(3).
[20]丁乐乐,张小红,于兴旺,等.网络RTK双差模糊度解算成功率的提高[C]//第二届中国卫星导航学术年会电子文集,2011.
[21]JI S,CHEN W,DING X,et al.Ambiguity validation with combined ratio test and ellipsoidal integer aperture estimator[J].Journal of Geodesy,2010,84(10):597-604.