一种GPS单频相对定位的动态初始化方法
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摘要
GPS相对定位的初始化过程一般要求基线处于静止状态,且要求在观测过程中可见星数目保持不变,不利于高动态载体在遮挡环境中的应用。针对此问题,本文提出一种动态初始化方法,能够有效处理遮挡所造成的频繁的卫星起落现象,同时充分利用历史观测与当前观测方程中部分模糊度分量的关联性,缩短初始化时间。实际的动态试验表明,该方法可以在载体动态状态下短时内完成模糊度解算的初始化,并且整周模糊度估计的成功率对卫星起落次数不敏感。
Regarding the initialization of GPS relative positioning,the baseline is usually required to be in a static state and assumed that the same visible satellites can be observed during the observation. Thus,it is not applicable for the high dynamic vehicles within occlusion environment. According to deal with this problem,a new method for dynamic initialization is presented in this paper,which can handle the frequent satellite setting and rising and shorten initialization time by utilizing the ambiguity relevance of past observation and current observation. The actual dynamic test shows that the method can be used to complete the initialization of the ambiguity resolution in the short time and the success rate of the integer ambiguity estimation is not sensitive to the number of satellite setting and rising.
Regarding the initialization of GPS relative positioning,the baseline is usually required to be in a static state and assumed that the same visible satellites can be observed during the observation. Thus,it is not applicable for the high dynamic vehicles within occlusion environment. According to deal with this problem,a new method for dynamic initialization is presented in this paper,which can handle the frequent satellite setting and rising and shorten initialization time by utilizing the ambiguity relevance of past observation and current observation. The actual dynamic test shows that the method can be used to complete the initialization of the ambiguity resolution in the short time and the success rate of the integer ambiguity estimation is not sensitive to the number of satellite setting and rising.
引文
[1]Chen P,Shu L,Ding R,et al.Kinematic single-frequency relative positioning for LEO formation flying mission[J].GPS Solutions,2015,19(3):525-535.
[2]Buist P J,Teunissen P J G,Giorgi G,Verhagen S.Multivariate bootstrapped relative positioning of spacecraft using GPS L1/Galileo E1 signals[J].Advances in Space Research,2010,47(5):770-785.
[3]Teunissen P J G.GNSS ambiguity resolution[J].Journal of Geodesy,2004,78(1):235-244.
[4]Teunissen P J G.The LAMBDA method for the GNSS compass[J].Artifical Satellite,2007,41(3):89-103.
[5]Montenbruck O,Wermuth M,Kahle R.GPS based relative navigation for the Tan DEM-X mission—first flight results[J].Navig J Ins,2011,58(4):293-304.
[6]Mohiuddin S,Psiaki M L.High-altitude satellite relative navigation using carrier-phase differential global positioning system techniques[J].J Guidance Control Dynamic,2007,30(5):1427-1436.
[7]Chang X W,Paige C C.An orthogonal transformation algorithm for GPS positioning[J].SIAM J Sci,Comp2003,24(5):1710-1732.
[8]Chang X W,Paige C C,Yin L.Code and carrier phase based short baseline GPS positioning:Computational aspects[J].GPS Solutions,2004,7(4):230-240,2004.
[9]Chen W,Li X.Success rate improvement of single epoch integer least-squares estimator for the GNSS attitude/short baseline applications with common clock scheme[J].Acta Geodaetica et Geophysica,2014,49(3):295-312.
[2]Buist P J,Teunissen P J G,Giorgi G,Verhagen S.Multivariate bootstrapped relative positioning of spacecraft using GPS L1/Galileo E1 signals[J].Advances in Space Research,2010,47(5):770-785.
[3]Teunissen P J G.GNSS ambiguity resolution[J].Journal of Geodesy,2004,78(1):235-244.
[4]Teunissen P J G.The LAMBDA method for the GNSS compass[J].Artifical Satellite,2007,41(3):89-103.
[5]Montenbruck O,Wermuth M,Kahle R.GPS based relative navigation for the Tan DEM-X mission—first flight results[J].Navig J Ins,2011,58(4):293-304.
[6]Mohiuddin S,Psiaki M L.High-altitude satellite relative navigation using carrier-phase differential global positioning system techniques[J].J Guidance Control Dynamic,2007,30(5):1427-1436.
[7]Chang X W,Paige C C.An orthogonal transformation algorithm for GPS positioning[J].SIAM J Sci,Comp2003,24(5):1710-1732.
[8]Chang X W,Paige C C,Yin L.Code and carrier phase based short baseline GPS positioning:Computational aspects[J].GPS Solutions,2004,7(4):230-240,2004.
[9]Chen W,Li X.Success rate improvement of single epoch integer least-squares estimator for the GNSS attitude/short baseline applications with common clock scheme[J].Acta Geodaetica et Geophysica,2014,49(3):295-312.