PMID- 30567333
OWN - NLM
STAT- PubMed-not-MEDLINE
DCOM- 20181221
LR  - 20190107
IS  - 1424-8220 (Electronic)
IS  - 1424-8220 (Linking)
VI  - 18
IP  - 12
DP  - 2018 Dec 18
TI  - Characteristics of BDS Signal-in-Space User Ranging Errors and Their Effect on 
      Advanced Receiver Autonomous Integrity Monitoring Performance.
LID - 10.3390/s18124475 [doi]
LID - 4475
AB  - 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 
      sigma(URE) for the accuracy and continuity and sigma(URA) used for the integrity of the 
      SIS UREs. The results show that the broadcast sigma(URA) of 2 m cannot completely 
      overbound SIS UREs for all BDS satellites, but the sigma(URA) of 2.4 m can. Then, we 
      use the sigma(URA) of 2.4 m to evaluate the ARAIM Pfa and availability. The results 
      show that the Pfa may increase to 2 x 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 sigma(URE) 
      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 sigma(URE) is less than the Pfa in ISM for the worst-performing IGSO 
      satellite. Most Pfa values calculated by the computed sigma(URE) is less than the Pfa 
      in the ISM for the worst-performing MEO satellite. For BDS satellites, the Pfa is 
      mainly affected by sigma(URE). When the sigma(URA) of 2.4 m is used to evaluate the 
      availability, the computed availability is lower than the availability calculated 
      by the broadcast sigma(URA)/sigma(URE) and the greatest degradation can reach 25%.
FAU - Wang, Zhipeng
AU  - Wang Z
AD  - School of Electronic and Information Engineering, Beihang University, Beijing 
      100191, China. wangzhipeng@buaa.edu.cn.
FAU - Shao, Wei
AU  - Shao W
AD  - School of Electronic and Information Engineering, Beihang University, Beijing 
      100191, China. shaowei@buaa.edu.cn.
FAU - Li, Rui
AU  - Li R
AD  - School of Electronic and Information Engineering, Beihang University, Beijing 
      100191, China. lee_ruin@buaa.edu.cn.
FAU - Song, Dan
AU  - Song D
AD  - School of Electronic and Information Engineering, Beihang University, Beijing 
      100191, China. songdan0207@163.com.
FAU - Li, Tinglin
AU  - Li T
AD  - School of Electronic and Information Engineering, Beihang University, Beijing 
      100191, China. leetl@buaa.edu.cn.
LA  - eng
GR  - 61501010, 61871012/National Natural Science Foundation of China/
GR  - GFZX0305030106/second satellite navigation system of China/
PT  - Journal Article
DEP - 20181218
PL  - Switzerland
TA  - Sensors (Basel)
JT  - Sensors (Basel, Switzerland)
JID - 101204366
PMC - PMC6308580
OTO - NOTNLM
OT  - ARAIM
OT  - availability
OT  - false alert probability
OT  - signal-in-space user range errors
COIS- The authors declare no conflict of interest.
EDAT- 2018/12/21 06:00
MHDA- 2018/12/21 06:01
PMCR- 2018/12/01
CRDT- 2018/12/21 06:00
PHST- 2018/11/02 00:00 [received]
PHST- 2018/12/08 00:00 [revised]
PHST- 2018/12/15 00:00 [accepted]
PHST- 2018/12/21 06:00 [entrez]
PHST- 2018/12/21 06:00 [pubmed]
PHST- 2018/12/21 06:01 [medline]
PHST- 2018/12/01 00:00 [pmc-release]
AID - s18124475 [pii]
AID - sensors-18-04475 [pii]
AID - 10.3390/s18124475 [doi]
PST - epublish
SO  - Sensors (Basel). 2018 Dec 18;18(12):4475. doi: 10.3390/s18124475.