INDIAN JOURNAL OF MARINE SCIENCES

摘要

The geoid is a gravity equipotential surface approximating well to the mean sea surface over the ocean. The geoid contains more information regarding mass distribution inside the earth than the gravity alone, since gravity only represents the first derivative of the geopotential. The sea surface height (SSH), measured by satellite altimeter, and when corrected for atmospheric propagation delays and dynamic oceanic variabilities and averaged to minimize the effects due to dynamic sea surface topography, conforms to the equipotential surface, known as the geoid.