Supervisor:
Southwest Ordnance Industry Bureau
Organizer:
Chongqing Ordnance Industry Society
Chongqing University of Technology
Chongqing University of Technology
Research on inertial assisted GNSS separability analysis and the outlier detection method
| DOI: | 10.11809/bqzbgcxb2023.05.031 |
| Keywords: | GNSS; inertia; outlier detection; separability; positioning |
| Abstract: | Aiming at the outliers caused by satellite signal attenuation and interruption under the occlusion of high buildings, this paper introduces inertial assisted GNSS to provide continuous and reliable navigation and positioning services. Based on the reliability theory, the outlier detection and identification method of inertial assisted GNSS tightly coupled integration system is derived, and the reliability, separability, misjudgment and positioning accuracy of GNSS stand alone system and inertial assisted GNSS system are analyzed. The experimental results show that there is a strong correlation between the observed values of GNSS stand alone system in a restricted observation environment, which leads to frequent misjudgment and abnormal minimum detectable bias. Inertial assisted GNSS can reduce the correlation coefficient of the observed values to about 0.2, and reduce the minimum detectable bias to less than 5 m. It can effectively detect and identify outliers, and improve the misjudgment rate of GNSS stand alone system to achieve a higher positioning accuracy. |
| Issue: | Vol. 44 No. 5 (2023) |
| Published: | 2023-05-28 |
| PDF HTML | |