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ISSN 2070-7401 (Print), ISSN 2411-0280 (Online)
Sovremennye problemy distantsionnogo zondirovaniya Zemli iz kosmosa
CURRENT PROBLEMS IN REMOTE SENSING OF THE EARTH FROM SPACE

  

Sovremennye problemy distantsionnogo zondirovaniya Zemli iz kosmosa, 2019, Vol. 16, No. 4, pp. 33-44

On determination of the Earth’s surface small “instant” vertical displacements by GNSS-techniques

N.V. Shestakov 1, 2 , D.V. Sysoev 1, 2 , M.D. Gerasimenko 1, 2 , N.N. Titkov 3 , A.L. Verkhoturov 4 , N.A. Gagarskii 2 , A.K. Kishkina 2 , M. Guojie 5 , H. Takahashi 6 
1 Institute of Applied Mathematics FEB RAS, Vladivostok, Russia
2 Far Eastern Federal University, Vladivostok, Russia
3 Kamchatka Branch, Geophysical Service RAS, Petropavlovsk-Kamchatsky, Russia
4 Computing Center FEB RAS, Khabarovsk, Russia
5 Institute of Earthquake Forecasting, China Earthquake Administration, Beijing, China
6 Institute of Seismology and Volcanology, Faculty of Science, Hokkaido University, Sapporo, Japan
Accepted: 11.04.2019
DOI: 10.21046/2070-7401-2019-16-4-33-44
Mathematical modeling of various natural and man-made processes is based on the Earth’s surface displacement data, to obtain which the Global Positioning Systems GPS and GLONASS are widely used. The “instant” vertical surface displacements occurred at short time intervals (from seconds to minutes) are the subject of special interest. Based on the experiment using the moving GNSS antenna, the paper investigates the problem of detection ability, accuracy and reliability of determination of small “instant” displacements ranging from 6.4 to 32 mm by the high-precision and most frequently used software packages BERNESE, GAMIT/GLOBK and GIPSY-OASIS and standard geodynamic GNSS data processing techniques. It is shown that all antenna shifts associated with the investigated displacement range could be confidently resolved from the results of daily static GPS/GLONASS data processing performed by the BERNESE and GAMIT/GLOBK packages. The GIPSY-OASIS software is not recommended for the determination of subcentimeter level displacements due to high dispersion and relatively low precision of the obtained coordinate solutions. Joint processing of GPS and GLONASS signals slightly improves the precision determination of displacements. The formal root-mean-square errors of the Earth’s surface displacements calculated based on coordinate errors resulting from the GNSS data processing are not realistic in some cases and need further rescaling.
Keywords: GLONASS/GPS-measurements, “instant” vertical displacements, experiment using the moving GNSS-antenna, accuracy of displacement determination, hypothesis testing
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