New era in studies of gravity field of Earth

Earth gravity field investigations are important for geophysics, geology, meteorology, oceanology and other geosciences. Before 2000 the gravity field parameters have been obtained from the mathematical processing of the satellite observations from ground stations. The satellite approaches to the gravity field analysis allow us to determine the gravity field models on the global scale during the whole space missions. The further improvements of these parameters are connected to the time variations of the gravitational field. Therefore, the task of obtaining high-degree models of the Earth's gravitational field of high accuracy from observations from space has become urgent. The practical implementation of satellite gravitational missions has opened a new era in the study of the static gravitational field of the Earth and its temporal variations.