Research on precipitable water vapor inversion influencing factors of GNSS for offshore mobile platforms

CAO Kai; LUO Xiaowen; WEN Song; YOU Wei

doi:10.3969/j.issn.1001-909X.2024.02.007

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Journal of Marine Sciences ›› 2024, Vol. 42 ›› Issue (2) : 71-80. DOI: 10.3969/j.issn.1001-909X.2024.02.007

Research on precipitable water vapor inversion influencing factors of GNSS for offshore mobile platforms

CAO Kai ¹^,² ,
LUO Xiaowen ¹^,²^,^* ,
WEN Song ²^,³ ,
YOU Wei ²

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Abstract

Based on Global Navigation Satellite System (GNSS) dynamic precision point positioning technology (PPP), the influence factors of precipitable water vapor (PWV) detection over the ocean were studied. The sampling interval, satellite masking angle, PPP solution method (fixed solution or floating point solution), and the influence of Beidou satellite system combination on ocean PWV retrieval were mainly analyzed. In the marine observation environment, the results show that the accuracy of PWV inversion is the highest when the sampling interval is 30 s. When the number of available satellites is small, the accuracy of PWV inversion is better when the satellite masking angle is set to 5°-10°, and the accuracy decreases gradually with the increase of the satellite masking angle. Whether the PPP solution is fixed or not, it has little effect on the accuracy of PWV inversion. On the basis of GPS/GLONASS system combination, adding Beidou observation value will improve the redundancy of observation and improve the accuracy of PWV inversion.

Key words

offshore mobile platform / precise point positioning (PPP) / Beidou Navigation Satellite System (BDS) / precipitable water vapor(PWV) / influencing factors

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CAO Kai , LUO Xiaowen , WEN Song , et al. Research on precipitable water vapor inversion influencing factors of GNSS for offshore mobile platforms[J]. Journal of Marine Sciences. 2024, 42(2): 71-80 https://doi.org/10.3969/j.issn.1001-909X.2024.02.007

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