Evaluation of the Galileo high-accuracy service SSR product quality and PPP performance

IF 2.8 3区地球科学 Q2 ASTRONOMY & ASTROPHYSICS

Advances in Space Research Pub Date : 2025-02-01 DOI:10.1016/j.asr.2024.11.021

Meng Gao , Ziheng Meng , Huizhong Zhu , Tianjun Liu , Aigong Xu , Chunbo Tan , Zhihua Cao

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引用次数: 0

Abstract

The Galileo navigation satellite system (Galileo) High-Accuracy Service (HAS) is a global navigation satellite system (GNSS) augmentation service proposed by the European Union that providing free of charge orbit, clock and pseudo-range biases corrections to users around the world through E6 signals and by terrestrial means (Internet). However, there has been limited research on the performance of the HAS State Space Representation (SSR) products broadcast by the Galileo Service Centre (GSC). However, there has been limited research on the performance of the HAS SSR products broadcast by the GSC. This study uses BNC software to receive HAS SSR products and compares them with SSR products from three analysis centers with relatively high accuracy: Wuhan University (WHU), the Chinese Academy of Sciences (CAS), and Centre National d’Etudes Spatiales (CNES), and analyzes them in terms of orbit, clock error, and positioning performance. In addition, Galileo HAS as a satellite-based augmentation service, this study chooses BDS PPP B2b, which is also a satellite-based augmentation service, as a comparison to analyze the performance of the HAS augmentation service. The results indicate that the signal-in-space ranging error (SISRE) values for Global Positioning System (GPS) and Galileo corrected by HAS are 7.26 cm and 5.79 cm, respectively. The average convergence times for the GPS + Galileo combination in the static and kinematic modes are 9.4 min and 14.1 min, respectively. Moreover, in kinematic mode, single-system positioning achieved an accuracy of better than 12 cm in the E direction and better than 17 cm in the U direction. In comparison with BeiDou navigation satellite system (BDS) PPP-B2b, the average convergence time of HAS under static mode is 16 min, while that of B2b requires 19 min. Meanwhile, the positioning accuracy of B2b products in the three directions is improved by more than 1 cm compared with that of HAS. The convergence time of HAS in kinematic mode is 12 min shorter than that of B2b.

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来源期刊

Advances in Space Research 地学天文-地球科学综合

CiteScore

5.20

自引率

11.50%

发文量

800

审稿时长

5.8 months

期刊介绍： The COSPAR publication Advances in Space Research (ASR) is an open journal covering all areas of space research including: space studies of the Earth''s surface, meteorology, climate, the Earth-Moon system, planets and small bodies of the solar system, upper atmospheres, ionospheres and magnetospheres of the Earth and planets including reference atmospheres, space plasmas in the solar system, astrophysics from space, materials sciences in space, fundamental physics in space, space debris, space weather, Earth observations of space phenomena, etc. NB: Please note that manuscripts related to life sciences as related to space are no more accepted for submission to Advances in Space Research. Such manuscripts should now be submitted to the new COSPAR Journal Life Sciences in Space Research (LSSR). All submissions are reviewed by two scientists in the field. COSPAR is an interdisciplinary scientific organization concerned with the progress of space research on an international scale. Operating under the rules of ICSU, COSPAR ignores political considerations and considers all questions solely from the scientific viewpoint.