Abstract
Recently, the marine mean gravity anomaly dataset are available to us on a 2 arc minute grid obtained from satellite altimeter data. To formulate gravity field model based on this dataset, in this work we refer to use the method named Pseudo-Harmonic Regional Analysis (PHRA) instead of the conventional Spherical Harmonic Analysis (SHA) due to its high resolution for describing the regional gravity field. The result show that even if taking factor fsc=5 in PHRA, a model to degree 1080 will be enough to represent mean gravity anomaly dataset with the accuracy ±2.4 mGal on 2 arc minute grid, the RMS of the differences between the PHRA model and the geoid undulations altimeter derived are ±0.095m. The PHRA model offers significant improvements compared with any existing models with the same degree and order.
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Lu, Y., Hsu, HT. (2003). Pseudo-Harmonic Representation of Gravity Field over South China Sea. In: Hwang, C., Shum, C.K., Li, J. (eds) Satellite Altimetry for Geodesy, Geophysics and Oceanography. International Association of Geodesy Symposia, vol 126. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-18861-9_14
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DOI: https://doi.org/10.1007/978-3-642-18861-9_14
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