Astronomy and Astrophysics – Astronomy
Scientific paper
Feb 2004
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004acasn..45...88z&link_type=abstract
Acta Astronomica Sinica, vol. 45, no. 1, p. 88-94
Astronomy and Astrophysics
Astronomy
4
Ocean Tides, Gravitational Field, Loading Love Numbers
Scientific paper
Ocean tide effects on gravitational field can be recognized as a kind of loading influence. In some sites, for example, group of islands in the ocean and coastland, the ocean tides loading influence on gravitational field can reach to magnitude of ?gal, therefore, it must be taken into account in research of high precision gravitational field. This paper studied the theory and method for influence of ocean loading tides on gravitational field. In the process of deducing the formula, on avoided to develop the density of point loading into spherical harmonics, but directly to take the gravitational potential of ocean loading as a foundation and to contain the height of ocean tides in this expression, the relevant formulas for ocean tide's influence on gravitational field are deduced out. At the same time, some problems which should be noticed when the accuracy reaches magnitude of ngal are discussed. This study can provide reference and bases for theoretical research of space geodesy.
Xu Hou-Ze
Zhang Han-Wei
Zhou Xin-Hua
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