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Inertial Aided Cycle Slip Detection and Repair for PPP/INS Tightly Coupled Navigation

Published online by Cambridge University Press:  09 February 2016

Zengke Li ,
Jingxiang Gao  and
Jian Wang
Zengke Li*
Affiliation:
(School of Environment and Spatial Informatics, China University of Mining and Technology, Xuzhou, China)
Jingxiang Gao
Affiliation:
(School of Environment and Spatial Informatics, China University of Mining and Technology, Xuzhou, China)
Jian Wang
Affiliation:
(School of Environment and Spatial Informatics, China University of Mining and Technology, Xuzhou, China)
*
(E-mail: [email protected])
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Abstract

The integration of Precise Point Positioning (PPP) with Inertial Navigation Systems (INS) has been very intensively developed and widely applied in multiple areas. The integrated navigation system is able to provide high accuracy position and attitude with a single receiver. However, the cycle slip caused by high dynamics, signal lock and low satellite elevation will decrease accuracy and degrade the system performance. In this paper, an inertial aided cycle slip detection and repair method is applied in PPP/INS tightly coupled navigation to obtain higher accuracy navigation information. The inertial information is introduced to the wide-lane combination observation to avoid the noise and multipath from pseudorange. Detail error analysis is given to determine the critical value of INS position accuracy which makes inertial aided wide-lane combination have better performance and a new decision variable is constructed. The inertial aided cycle slip detection and repair scheme that replaces the ambiguity re-initialisation is applied in PPP. An experiment was performed to validate the new algorithm. The results indicate that the inertial aided decision variable has higher accuracy than the traditional Melbourne-Wübbena decision variable. The inertial aided scheme can efficiently detect and repair the small cycle slip (from 1 to 6) and large cycle slip (from 10 to 20). The inertial-aided cycle slip detection method introduced in PPP resolution will remove the error by ambiguity re-initialisation.

Keywords

PPPINSCycle slipWide-lane combination
Type
Research Article
Information
The Journal of Navigation , Volume 69 , Issue 6 , November 2016 , pp. 1357 - 1378
Copyright
Copyright © The Royal Institute of Navigation 2016 

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