GPS SISRE/URA Integrity Analysis for ARAIM

Mistrapau, F.; Bija, Bogdan; Cueto-Felgueroso, G.; Odriozola, M.; Azaola, M.; Cezón, A.; Amarillo-Fernández, Francisco

doi:10.33012/2016.14865

Cited by 3 publications

(3 citation statements)

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“…The broadcast ephemeris is downloaded from the center of Multi-GNSS Experiment (MGEX) of the International GNSS Service (IGS) with RINEX 3 format. The precise ephemeris is generated by IGS Wuhan analysis center and made available through public database with few centimeters range accuracy that is assumed as the true value [9]. For time and reference systems, the precise ephemeris is referred to the GPS time system while broadcast ephemeris is referred to the BDS time system.…”

Section: Calculation Methods Of Bds Ure and Autocovariancementioning

confidence: 99%

Nominal Range Error Analysis of BDS for ARAIM

Zhang¹,

Jiang²

2021

Proceedings of the 2021 International Technical Meeting of the Institute of Navigation

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Section: Calculation Methods Of Bds Ure and Autocovariancementioning

confidence: 99%

Nominal Range Error Analysis of BDS for ARAIM

Zhang¹,

Jiang²

2021

Proceedings of the 2021 International Technical Meeting of the Institute of Navigation

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“…The precise ephemeris contains accurate satellite orbital elements and clock error information. We consider that the precise ephemeris can replace the real satellite orbital elements to calculate the SIS UREs because the precise ephemeris and the real satellite orbital elements are of the same order of magnitude, with errors of only a few centimeters; thus, the precise ephemeris is much more accurate than the broadcast ephemeris [11]. The precise ephemeris is generated by the International GNSS Service (IGS) and MGEX Analysis Center and can be obtained from a public database.…”

Section: Statistics and Overbound Of Bds Sis Urementioning

confidence: 99%

“…When calculating the SIS UREs, there are four types of SIS UREs that must be considered: instantaneous SIS UREs, global average rms SIS UREs, orbit-only rms SIS UREs and worst-case SIS UREs [11]. This section mainly considers the computation of the global average rms SIS UREs, orbit-only rms SIS UREs and worst-case SIS UREs.…”

Section: Statistics and Overbound Of Bds Sis Urementioning

confidence: 99%

Characteristics of BDS Signal-in-Space User Ranging Errors and Their Effect on Advanced Receiver Autonomous Integrity Monitoring Performance

Wang

Shao

et al. 2018

Sensors

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Signal-In-Space User Range Errors (SIS UREs) are assumed to be overbounded by a normal distribution with a standard deviation represented by the User Range Accuracy (URA). The BeiDou Navigation Satellite System (BDS) broadcast URA is not compatible with the historical SIS URE performance that affects the Advanced Receiver Autonomous Integrity Monitoring (ARAIM) False Alert Probability (Pfa) and availability evaluation. This study compares the BDS broadcast and precise ephemeris from 1 March 2013 to 1 March 2017 to obtain SIS UREs. Through analyzing the statistical characteristics of the SIS UREs, we obtain the standard deviation σURE for the accuracy and continuity and σURA used for the integrity of the SIS UREs. The results show that the broadcast σURA of 2 m cannot completely overbound SIS UREs for all BDS satellites, but the σURA of 2.4 m can. Then, we use the σURA of 2.4 m to evaluate the ARAIM Pfa and availability. The results show that the Pfa may increase to 2 × 10−5 and exceed its limit by an order of magnitude. We also consider the differences between the SIS UREs of Geostationary Earth Orbit (GEO), Inclined Geo-Synchronous Orbit (IGSO), and Medium Earth Orbit (MEO). The results indicate that all Pfa values calculated by the computed σURE are less than the Pfa in the Integrity Support Message (ISM) for the worst-performing GEO satellite. The approximately 55% Pfa calculated by the computed σURE is less than the Pfa in ISM for the worst-performing IGSO satellite. Most Pfa values calculated by the computed σURE is less than the Pfa in the ISM for the worst-performing MEO satellite. For BDS satellites, the Pfa is mainly affected by σURE. When the σURA of 2.4 m is used to evaluate the availability, the computed availability is lower than the availability calculated by the broadcast σURA/σURE and the greatest degradation can reach 25%.

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