A single-epoch ambiguity resolution method using iterative weighted AFM

doi:10.13474/j.cnki.11-2246.2019.0351

Abstract

Abstract: In order to improve the success rate of attitude determination with global navigation satellite system (GNSS) in complex environments, the iterative weighted ambiguity function method (IWAFM) is proposed, which combines the idea of iterative weighted with the ambiguity function method (AFM). By designing a new fitness function which using the residuals to calculate the weights, the weights of different satellites can be automatically adjusted. The information of inertial sensors is used to shrink the search space of IWAFM, so that the amount of calculation is reduced. The experimental results show that IWAFM can effectively improve the fix rate of ambiguity in the complex environments compared with the AFM and CLAMBDA algorithms.

Key words: GNSS, satellite attitude determination, integer ambiguity resolution, ambiguity function method, iterative weighted

CLC Number:

P228

GAO Di, HE Wentao, LIN Xiaolong. A single-epoch ambiguity resolution method using iterative weighted AFM[J]. Bulletin of Surveying and Mapping, 2019, 0(11): 56-59,125.

References

[1] WANG B, MIAO L J, WANG S T, et al. A constrained LAMBDA method for GPS attitude determination[J]. Gps Solutions, 2009, 13(2):97-107.
[2] 段荣, 赵修斌, 庞春雷,等. 改进的GPS整周模糊度动态快速解算[J]. 华中科技大学学报(自然科学版), 2014, 42(9):54-58.
[3] 聂志喜, 王振杰, 欧吉坤,等. 非线性基线长约束条件线性化近似对模糊度解算的影响[J]. 测绘学报, 2015, 44(2):168-173.
[4] PENG X W, GE M Y, WANG W Q. Improved LAMBDA algorithm applied to attitude determination[J]. Advanced Materials Research, 2014,926-930:3625-3628.
[5] 赵姣姣, 曲江华, 袁洪. 一种基于位置域的北斗快速整周模糊度确定方法[J]. 测绘科学技术学报, 2014, 31(3):249-252.
[6] 蒋青, 刁春帆, 田增山,等. 基于MEMS辅助的单基线北斗融合测姿算法[J]. 重庆邮电大学学报(自然科学版), 2016, 28(6):804-809.
[7] LI W Y, FAN P R, CUI X W, et al. A low-cost INS-integratable GNSS ultra-short baseline attitude determina-tion system[J]. Sensors, 2018, 18(7):2114-2133.
[8] 丛丽, 李二翠, 张立杨,等. 基于INS辅助CLAMBDA与AFM的GPS/INS组合导航测姿方法[J]. 系统工程与电子技术, 2015(4):882-886.
[9] YANG Y D, MAO X C, TIAN W F. A novel method for low-cost MIMU aiding GNSS attitude determination[J]. Measurement Science and Technology, 2016, 27(7):29-38.
[10] 宋高顺, 王昌明, 何云峰, 等. 模糊度函数法中适应度函数的自适应设计[J]. 南京理工大学学报(自然科学版), 2012, 36(5):840-845.
[11] NOWEL K, CELLMER S, KWANIAK D. Mixed integer-real least squares estimation for precise GNSS positioning using a modified ambiguity function approach[J]. GPS Solutions, 2018, 22(1):31-42.
[12] CHANG G B, XU T B, WANG Q X, et al. GNSS attitude determination method through vectorisation approach[J]. IET Radar, Sonar & Navigation, 2017, 11(10):1477-1482.
[13] WANG Y, ZHANG X B, PANG C L, et al. Improved pitch-constrained ambiguity function method for integer ambiguity resolution in BDS/MIMU-integrated attitude determination[J]. Journal of Geodesy, 2019, 93(4):561-572.
[14] COUNSELMAN C C, GOUREVITCH S A. Miniature interferometer terminals for earth surveying:ambiguity and multipath with global positioning system[J]. IEEE Transactions on Geoscience & Remote Sensing, 1981, GE-19(4):244-252.
[15] 吴美平,胡小平,逮亮清. 卫星定向技术[M]. 第2版. 北京:国防工业出版社, 2013:64-65.