An analysis of BDS-3 real-time PPP: Time transfer, positioning, and tropospheric delay retrieval. (February 2021)

• Record Type: Journal Article
• Authors: Ge, Yulong; Chen, Shaoxin; Wu, Tao; Fan, Caoming; Qin, Weijin; Zhou, Feng; Yang, Xuhai
• Is Part Of: Measurement. Volume 172(2021)
• Publication Date: 2021-02
• Subjects: BDS BeiDou Navigation Satellite System -- BDS-3 Global BeiDou navigation system -- BDS-3S BeiDou-3 experimental satellites -- CNES Centre National d'Etudes Spatiales -- GNSS Global navigation satellite system -- IF Ionosphere-free -- IGS International GNSS service -- MGEX Multi-GNSS experiment -- GFZ GeoForschungsZentrum -- OMC Observed minus computed -- PNT Positioning, navigation, and timing -- STD Standard deviation -- RTCM Radio Technical Commission for Maritime Services -- PCOs Phase center offsets -- PCVs Phase center variations -- PPP Precise point positioning -- RTK Real-time Kinematic -- RAC Radial, Along and Cross -- RTS Real-time service -- RTPP Real-time pilot project -- TAI International Atomic Time -- 3D Three-dimensional -- MDEV Modified Allan deviation -- ZTD Zenith total delays -- UPD Uncalibrated phase delay -- UCD Uncalibrated Code delay -- WHU Wuhan University -- ZWD Zenith wet delay -- SSR State-space representation; Real-time PPP -- BDS-3 -- Precise positioning -- Tropospheric delay -- Time transfer; Weights and measures -- Periodicals; Measurement -- Periodicals; Measurement; Weights and measures; Periodicals; 530.8
• DOI: 10.1016/j.measurement.2020.108871
• Languages: English
• ISSNs: 0263-2241

Abstract

Highlights: Accuracy and availability of BDS-3 real-time products in CLK93 are evaluated. Real-time time transfer with BDS-3PPP are presented firstly. Positioning and ZTD estimated are investigated firstly using BDS real-time PPP. Abstract: With the development of China's BDS-3, more studies focused on its performance in precise point positioning (PPP), mainly in post-processing mode. This study conducts a comprehensive investigation of BDS-3 real-time PPP with Centre National d'Etudes Spatiales (CNES) real-time products (SSRA00CNE0) from the perspective of time transfer, positioning, and tropospheric delay retrieval. First, the availability and accuracy of BDS-3 real-time products were evaluated over 41 days. The product availability was about 80%. The accuracy of BDS-3 satellite orbit were 0.060, 0.115 and 0.065 m in the radial, along-track, and cross-track component. In addition, the standard deviation (STD) of satellite clock difference was 0.455 ns. Afterwards, precise time transfer, positioning, and Zenith troposphere delay (ZTD) estimation derived from BDS-3 real-time PPP were assessed with 7-day processing. The root mean square (RMS) of smoothed residuals is 0.020 ns, while it is 0.001 ns for BDS-3 PPP with WUM final products for time transfer. Furthermore, the RMS values of positioning errors derived from real-time static BDS-3 PPP positioning were 0.021, 0.010, and 0.03 m in the east (E), north (N), and up (U) component, respectively. Moreover, the RMS of ZTD estimation is 9.9 mm, which is comparable to GPS real-time PPP solutions.