Abstract
As an important part of the BeiDou global navigation satellite system (BDS-3), the BeiDou satellite-based augmentation system (BDSBAS) aims to provide a high-integrity navigation service for users in China and its surrounding areas. At present, BDSBAS has completed the preliminary construction of the system and formed the single frequency (SF) augmentation service. The paper introduces the composition and working process of BDSBAS, and expounds the solution and performance evaluation methods of the BDSBAS SF service. Tests based on a general aviation aircraft were carried out at Caihu Airport in Shenyang, China, which simulated the aircraft’s take-off and landing operation during the approach phase and the transition flight operation during the en-route phase. On this basis, the BDSBAS SF service performance was analyzed and evaluated. The horizontal positioning errors of the three flight tests are 1.62, 1.27, and 1.49 m, respectively, and the vertical positioning errors are 4.38, 4.30, and 4.04 m, respectively. In the first two tests, the APV-I availability and continuity of the service reach 100%. In the last test, a receiver false alarm event occurred, resulting in an APV-I availability and continuity of 99.993% and 99.989%, respectively. The event was confirmed to be caused by some aviation environmental factors and was not related to the system service. No integrity events occurred during the tests. The test results show that the positioning accuracy, availability, and integrity of the BDSBAS SF service meet the APV-I level requirements of the ICAO standards, which preliminarily illustrates the ability of BDSBAS to be used in the field of civil aviation.
Highlights
Published: 2 March 2022As an important augmentation technique of GNSS, the satellite-based augmentation system (SBAS) was originally designed for aviation use to provide the capability for increased availability and accuracy in position reporting, and to allow for more time for uniform and high quality air traffic management [1]
Neither exceeds the protection level (PL), which means that no false alarms or missed alarms occurred during the test
Conclusions paper, described overall situation construction progress In In thisthis paper, wewe described thethe overall situation andand thethe construction progress of of BeiDou satellite-based augmentation system (BDSBAS), and used the general aviation aircraft to carry out the flight test
Summary
As an important augmentation technique of GNSS, the satellite-based augmentation system (SBAS) was originally designed for aviation use to provide the capability for increased availability and accuracy in position reporting, and to allow for more time for uniform and high quality air traffic management [1]. South Korea government has developed its own SBAS, named the Korea Augmentation Satellite System (KASS), with the goal of providing APV-I operation as early as from year 2022 [24]. BDSBAS has completed the preliminary construction and is carrying out performance testing, and the first phase of BDSBAS will provide the SF service to augment the GPS satellites. A false alarm event was discovered during the test due to some unknown aviation environmental factors, which reminded us that we need to strengthen the detection and protection capabilities of aviation electromagnetic interference in the development of BDSBAS aviation airborne terminals This contribution can help the majority of GNSS and SBAS users, as well as related engineering R&D and scientific research personnel, to better understand the latest construction progress of BDSBAS, and provide experience and reference for the upcoming BDSBAS civil aviation airworthiness certification work.
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