Analyses of the sensitivity of multi-constellation advanced receiver autonomous integrity monitoring vertical protection level availability to error parameters and a failure model over China

Abstract

The availability of advanced receiver autonomous integrity monitoring for vertical guidance down to altitudes of 200 ft (LPV-200) is discussed using real satellite orbit/ephemeris data collected at eight international global navigation satellite system service stations across China. Analyses were conducted for the availability of multi-constellation advanced receiver autonomous integrity monitoring and multi-fault advanced receiver autonomous integrity monitoring, and the sensitivity of availability in response to changes in error model parameters (i.e. user range accuracy, user range error, Bias-Nom and Bias-Max) was used to compute the vertical protection level. The results demonstrated that advanced receiver autonomous integrity monitoring availability based on multiple constellations met the requirements of LPV-200 despite multiple-fault detections that reduced the availability of the advanced receiver autonomous integrity monitoring algorithm; the advanced receiver autonomous integrity monitoring availability thresholds of the user range error and Bias-Nom used for accuracy were more relevant to geographic information than the user range accuracy and Bias-Max used for integrity at the eight international global navigation satellite system service stations. Finally, the possibility of using the advanced receiver autonomous integrity monitoring algorithm for a Category III navigation standard is discussed using two sets of predicted errors, revealing that the algorithm could be used in 79% of China.

Evaluation of the weighted least square based Receiver Autonomous Integrity Monitoring (RAIM) for single frequency GNSS receivers

“…A receiver's PL describes the maximum possible position error (in units of distance) within a specified confidence level which is also taken as a threshold for fault detection. The PL represents the radius of the circle having the true position as its center (Hewitson & Wang, 2006;Wang et al, 2018;Zheng et al, 2018). Horizontal protection level (HPL) provides bounds to horizontal direction and Vertical Protection Level (VPL) provides bounds to vertical position.…”

A Dynamic-Data-Driven Method for Improving the Performance of Receiver Autonomous Integrity Monitoring

“…Many researchers [20] have devoted efforts to reducing the missed detection probability and alarm limit of RAIM in order to meet the stringent LPV-250 navigation requirements. Among existing methods, multiconstellation ARAIM with integrity support messages has the potential to be used for LPV-250; however, the availability of single-constellation ARAIM [21] is low, so there is still a need to develop single-constellation RAIM methods that can meet the monitoring requirements for LPV-250 [22], [23]. In reference [24], although we attempted to achieve the critical value of the characteristic slope to reduce the fault detection risk of the LSR algorithm, it was still difficult to use LSR-RAIM for LPV-250 in a single constellation.…”