Evaluation of the availability of BDS ARAIM

doi:10.11947/j.AGCS.2021.20200518

Abstract

Abstract: With the completion of the BDS-3, the performance of the BDS has been comprehensively improved, which greatly improves the accuracy and integrity of navigation and positioning, and provides an opportunity for the development of advanced receiver autonomous integrity monitoring (ARAIM). Based on this, this paper selects one week of observation data from ten evenly distributed multi-GNSS experiment (MGEX) stations around the world for the ARAIM experiment. At the same time, the seven-day broadcast ephemeris is used for availability simulation prediction to evaluate the ARAIM availability of the BDS in the Asia-Pacific region and the world. In order to increase the authenticity of the experiment, the aviation test data is also added for experiment. The experimental results of measured data show that the ARAIM availability of the BDS-2/BDS-3 is more than 95%, and BDS-3 is more than 85% among the MGEX stations that can receive the BeiDou satellite signal with the PRN number 1-46. The ARAIM availability of BDS-2/BSD-3 or BDS-3 is 100% in aviation flight data. The simulation results show that the availability coverage of BDS-2/BDS-3 greater than 90% and 99.5% are 100% and 96.15%, respectively, and the availability coverage of BDS-3 greater than 90% and 99.5% are 100% and 57.69%, respectively in the Asia-Pacific region. Globally, the availability coverage of BDS-2/BDS-3 greater than 90% and 99.5% are 79.94% and 42.82%, respectively, and the availability coverage of BDS-3 greater than 90% and 99.5% are 56.33% and 25.32%, respectively. In addition, the combination of BDS and GPS systems can greatly improve the availability of the ARAIM algorithm.

Key words: ARAIM, vertical protection level, LPV-200, BDS, availability

CLC Number:

P228

TIAN Yunqing, WANG Li, SHU Bao, HAN Qingqing, LI Long, YI Chen, XU Hao. Evaluation of the availability of BDS ARAIM[J]. Acta Geodaetica et Cartographica Sinica, 2021, 50(7): 879-890.

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