Satellite selection methods for multi-constellation advanced RAIM. Issue 5 (1st March 2020)

• Record Type: Journal Article
• Authors: Luo, Silong; Wang, Li; Tu, Rui; Zhang, Weiqi; Wei, Jiancheng; Chen, Cunting
• Is Part Of: Advances in space research. Volume 65:Issue 5(2020)
• Page Start: 1503
• Page End: 1517
• Publication Date: 2020-03-01
• Subjects: Advanced RAIM -- Satellite selection -- Multi-GNSS -- ISM -- LPV-200; Space sciences -- Periodicals; Astronautics -- Periodicals; Geophysics -- Periodicals; 500.505
• DOI: 10.1016/j.asr.2019.12.015
• Languages: English
• ISSNs: 0273-1177

Abstract

Abstract: The increased number of potential threat modes under multi-constellation advanced receiver autonomy integrity monitoring (ARAIM) requires an increase in the number of subsets and a correspondingly high computational load. A new satellite selection method based on integrity support message (ISM) parameters is proposed and compared with GDOP-based selection. The performance was tested on five days of data measurements from 21 multi-global navigation satellite system experiment (MGEX) stations distributed around the world, as well as simulation using the broadcast ephemeris. The results show that the proposed ISM-based satellite selection method is highly compatible with the baseline ARAIM. This method could reduce the computational times by about 60–70% quickly, with minimising vertical protection level (VPL) loss, which was consistently within 1 m, even a reduced VPL value in some epochs, and resulting in an improved availability. The simulation results were similar to the MGEX data. It appears that the application of ISM-based satellite selection can effectively reduce computational burden with a minimal impact on availability.