Abstract
A new method of GNSS gravity leveling is introduced to determine precisely normal height differences, Both the principle and application of the method are elaborated. Leveling surveying, gravity measurements, and GNSS measurements are carried out in a special region (including slopes, valleys and mountain ridges) to verify its accuracy by combining with gravity potential model. The results show that the precision by this method is mainly influenced by ellipsoidal height differences, gravity potential models, and gravity observations. However, the error by this method exhibits a clear linear relationship with the height difference, while it is independent of the length of the survey line. Within a specific range of height differences (within 360 m), the precision of the GNSS gravity leveling can reach the level of ± 10 mm. This method can, to some extent, provides a modern solution for height measurement which can replace the high-precision leveling surveying. The advantages of GNSS gravity leveling include high precision and high efficiency. It has a promising application prospect in geodesy, hydraulic engineering, earthquake and volcano monitoring.
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Acknowledgements
This work was supported by the National Natural Science Foundation of China [Grant No. 41304013] and the State Key Laboratory of Geodesy and Earth’s Dynamics [Grant No. SKLGED2022-5-2]. We extend our gratitude to Professor Chuanyin Zhang of the Chinese Academy of Surveying and Mapping for providing the geophysical geodetic scientific computation software (https://www.zcyphygeodesy.com/) and figures were plotted with the Generic Mapping Tool (Wessel et al. 2013). Thanks to all field workers involved in GNSS observations, leveling surveys, and gravity observations. Special thanks to Heting jian, Jiaying chen, and Rui wu for their hard work in gravity measurements! Also, our thanks to the two anonymous reviewers for their valuable comments on this manuscript.
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Hurong Duan: Conceptualization, Methodology, Participate in the experiment and writing Yerui Zhang: Calculation analysis, Editing and partial writing Lelin Xing: GMT ploting and Writing-Reviewing Weifeng Liang: Participate in the experiment.
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Duan, H., Zhang, Y., Xing, L. et al. GNSS Gravity Leveling. Pure Appl. Geophys. (2024). https://doi.org/10.1007/s00024-024-03492-2
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DOI: https://doi.org/10.1007/s00024-024-03492-2