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Precise orbit determination of haiyang‑2d using onboard BdS‑3 B1C/B2a observations with ambiguity resolution

Satellite Navigation 2023年第3期4卷 167-184页

作者： Kecai Jiang Wenwen Li Min Li Jianghui Geng Haixia Lyu Qile Zhao Jingnan Liu GNSS Research Center Wuhan University129 Luoyu RoadWuhan 430079China Key Laboratory of Space Ocean Remote Sensing and Application Ministry of Natural Resources8 Dahui Temple RoadBeijing 10081China Collaborative Innovation Center of Geospatial Technology 129 Luoyu RoadWuhan 430079China department of Land Surveying and Geo‑Informatics The Hong Kong Polytechnic University11 Yuk Choi RoadHung HomKowloonHong KongChina

The haiyang-2d altimetry mission of China is one of the first Low Earth Orbit(LEO)satellites that can receive new B1C/B2a signals from the Beidou-3 Navigation Satellite System(BdS-3)for Precise Orbit determination(POd).In this work,the achievable accuracy of the single-receiver ambiguity resolution for onboard LEO satellites is studied based on the real measurements of new BdS-3 *** normal conditions,six BdS-3 satellites on average are ***,the multipath of the B1C/B2a code observations presents some patchy patterns that cause near-field variations with an amplitude of approximately 40 cm and deteriorate the ambiguity-fixed *** modeling those errors,for the B2a code,a remarkable reduction of 53%in the Root Mean Square(RMS)is achieved at high elevations,along with an increase of 8%in the ambiguity-fixed ***,an analysis of the onboard antenna’s phase center offsets reveals that when compared to the solutions with float ambiguities,the estimated values in the antenna’s Z direction in the solutions with fixed ambiguities are notably *** independent validation of the resulting POd using satellite laser ranging at 16 selected high-performance stations shows that the residuals are reduced by a minimum of 15.4%for ambiguity-fixed solutions with an RMS consistency of approximately 2.2 ***,when compared to the dORIS-derived orbits,a 4.3 cm 3d RMS consistency is achieved for the BdS-3-derived orbits,and the along-track bias is reduced from 2.9 to 0.4 cm using ambiguity fixing.

关键词： Ambiguity resolution B1C/B2a Onboard BdS-3 Precise orbit determination haiyang-2d

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