一种改进的星载GPS周跳探测与修复方法

A Improved Cycle Slip Detection and Repair Method for On board GPS Data

Institute of Navigation and Aerospace Target, University of Information Engineering, Zhengzhou, 450001 China
2.
Beidou Navigation Technology Collaborative ]Innovation Center of Henan, Zhengzhou 450001, China

摘要: 周跳探测与修复是星载GPS数据预处理的重要内容。首先使用SWARM卫星实测数据对TurboEdit算法的有效性进行了分析,针对算法在观测噪声较大情况下无法有效探测小周跳的问题,提出了一种改进算法。该算法利用载波相位观测值对伪距组合观测值进行平滑,降低了观测噪声对宽巷模糊度的影响,提高了周跳探测能力。实验结果表明,改进算法能够有效提高小周跳的探测能力。
- 星载GPS数据预处理 /
- 小周跳探测与修复 /
- TurboEdit /
- 载波相位平滑
Abstract: Cycle slip detection and repair is an essential part of onboard Global Positioning System (GPS) data preprocessing. In this contribution, the effectiveness of TurboEdit algorithm is firstly analyzed using onboard GPS data observed by Swarm satellite. After that, an improved method is proposed, considering that TurboEdit algorithm can not detect small cycle slips when the observation noise is large. This new method uses carrier phase to smooth combined pseudorange observations and therefore reduces the impact observation noise laid on wide lane ambiguity and improves the capability of cycle slip detection. The method is tested and results show that it can effectively detect and repair small cycle slip.
- On-board GPS data pre-processing /
- small cycle slip detection /
- TurboEdit /
- carrier phase smoothing

[1]	冯来平, 阮仁桂, 吴显兵, 等. 联合低轨卫星和地面监测站数据确定导航卫星轨道［J］. 大地测量与地球动力学, 2016, 36(10): 864-869.
[2]	KARAIM M, KARAMAT T B, NOURELDIN A, et al. GPS cycle slip detection and correction at measurement level ［J］. British Journal of Applied Science ＆ Technology, 2014, 4(29): 4239-4251.
[3]	李征航. GPS测量与数据处理［M］. 武汉：武汉大学出版社, 2010: 143-149.
[4]	王敬, 赵军祥. Blewitt周跳探测方法的改进［J］. 飞行器测控学报, 2011, 30(2): 80-83.
[5]	GEOFFREY B. An automatic editing algorithm for GPS data ［J］. Geophysical Research Letters, 1990, 17(3): 199-202.
[6]	焦海松, 杨海强, 马国元, 等. 载波相位平滑伪距单点定位精度分析［J］. 全球定位系统, 2009, 34(4): 41-46.
[7]	CAI C, LIU Z, XIA P, et al. Cycle slip detection and repair for undifferenced GPS observations under high ionospheric activity［J］. GPS Solutions, 2013, 17(2): 247-260