Design and implementation of a BDS precise point positioning service

Liu, Cheng; Gao, Weiwei; Liu, Tianxiong; Wang, Dun; Yao, Zheng; Gao, Yang; Nie, Xiaodong; Wang, Wei; Li, Dongjun; Zhang, Weixing; Wang, Dongxia; Rao, Yongnan

doi:10.1002/navi.392

Cited by 30 publications

(14 citation statements)

References 9 publications

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“…The corresponding service coverage is clearly described in the interface document. The signal design and signal format of PPP-B2b are also introduced in the relevant papers (Liu et al, 2020). Some scholars verified the service performance and the efficiency of orbit corrections and clock offset corrections (Xu et al, 2021).…”

Section: Ppp-b2bmentioning

confidence: 99%

Principle and performance of BDSBAS and PPP-B2b of BDS-3

et al. 2022

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Within the framework of differential augmentation, this paper introduces the basic technical framework and performance of the BeiDou Global Navigation Satellite System (BDS-3) Satellite-Based Augmentation System (BDSBAS), including orbit products, satellite clock offset products, ionosphere and its integrity performance. The basic principle of BDS-3 Precise Point Positioning (PPP-B2b) is expounded, the similarities and differences between the PPP service provided by BDS-3 and International Global Navigation Satellite System (GNSS) Service (IGS) are discussed, and the limitations of PPP-B2b are analyzed. Since both the BDSBAS and PPP-B2b utilize a ground monitoring station network to determine the satellite orbits and clock offset corrections, and broadcast differential corrections through the three Geostationary Orbit (GEO) satellites of BDS-3, the feasibility of the co-construction of BDSBAS and PPP-B2b is analyzed, strategies for the infrastructure sharing and correction broadcasting are presented, and the influences of BDSBAS correction broadcasting strategy adjustment are evaluated. In addition, it assesses the possibility of broadcasting differential corrections through the Inclined Geosynchronous Orbit (IGSO) satellites of BDS-3, and the feasibility of augmenting satellite navigation with Low Earth Orbit (LEO) satellites.

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Section: Ppp-b2bmentioning

confidence: 99%

Principle and performance of BDSBAS and PPP-B2b of BDS-3

et al. 2022

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“…BDS has provided a satellite‐based PPP service for China and its neighboring areas since August 2020. The service defines multiple message types with a fixed length of 486 bits as shown in Table 9 (CSNO, 2020a; Liu et al., 2020). Currently, it supports corrections for GPS and BeiDou‐3 satellites.…”

Section: Open Ppp/ppp‐rtk Formatsmentioning

confidence: 99%

PPP/PPP‐RTK open formats: Overview, comparison, and proposal for an interoperable message

2021

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This paper presents and reviews the main existing open specifications for PPP/PPP‐RTK services, including satellite navigation providers (QZSS, Galileo, BeiDou, GLONASS) and other industrial or scientific initiatives (RTCM, SAPCORDA, 3GPP, IGS). To structure the comparison, we adapted PPP/PPP‐RTK services to the well‐known OSI model and defined them according to their properties in the OSI communication layers. We show how the proposed formats relate to the current standards, mainly RTCM SSR and CSSR, and what their differences and similarities are in terms of transmitted corrections and bandwidth. We compare the efficiency of the existing formats in two scenarios: a global PPP scenario with multi‐GNSS corrections, and a regional PPP‐RTK scenario, also multi‐GNSS and including ionospheric corrections. We propose an interoperable format that can be an extension to CSSR and allows efficient transmission of corrections for both global‐scale MEO‐based PPP as well as nationwide IGSO/GEO‐based PPP‐RTK.

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“…The service provides QZSS and GPS PPP-RTK corrections over areas with QZSS coverage around Japan. The Chinese BeiDou has a similar regional PPP service called PPP-B2b, where multi-GNSS (only BeiDou and GPS at the moment) PPP corrections are broadcast to users in China and its surrounding areas through BeiDou’s GEO satellites over the B2b signal (Liu et al 2020 ). Both QZSS CLAS and BeiDou PPP-B2b provide decimeter-level positioning (Hao et al 2020 ; Tao et al 2021 ; Xu et al 2021 ).…”

Section: Introductionmentioning

confidence: 99%

Assessment of Galileo High Accuracy Service (HAS) test signals and preliminary positioning performance

Naciri

Bisnath

et al. 2023

GPS Solut

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The Galileo High Accuracy Service (HAS) is a GNSS augmentation that provides precise satellite corrections to users worldwide for free directly through Galileo’s E6 signal. The HAS service provides free PPP corrections from the Galileo constellation and the Internet, with targeted real-time 95% positioning performance of better than 20 cm horizontal and 40 cm vertical error after 5 min of convergence time globally and shorter in Europe. The HAS initial service, under validation at the time of writing, provides these capabilities with a reduced performance (based on the current Galileo stations network). Live HAS test signals broadcasted from the Galileo satellites during summer 2022 have been decoded and analyzed. Corrections include Galileo and GPS orbit, clock, and code bias corrections, with SISRE of 10.6 cm and 11.8 cm for Galileo and GPS, respectively. Code bias corrections showed good performance as well, with rms of 0.28 ns, 0.26 ns, and 0.22 ns for Galileo C1C–C5Q, C1C–C7Q, and C1C–C6C, respectively, and 0.20 ns for GPS C1C–C2L. Float PPP positioning performance results show that the combined Galileo and GPS solution can already achieve the HAS full service accuracy performance target and is close in terms of convergence time, with 95% rms of 13.1 cm and 18.6 cm horizontally and vertically, respectively, in kinematic mode, and with a 95% convergence time of 7.5 min. The latter is expected to be improved with the inclusion of satellite phase bias and local atmospheric corrections. With these early Galileo HAS test signals, this preliminary analysis indicates that the HAS full service targets are attainable. Finally, a correction latency analysis is performed, showing that even with latency of up to 60 s, positioning can remain within the targeted HAS accuracy performance.

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Design and implementation of a BDS precise point positioning service

Cited by 30 publications

References 9 publications

Principle and performance of BDSBAS and PPP-B2b of BDS-3

Principle and performance of BDSBAS and PPP-B2b of BDS-3

PPP/PPP‐RTK open formats: Overview, comparison, and proposal for an interoperable message

Assessment of Galileo High Accuracy Service (HAS) test signals and preliminary positioning performance

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