This project aims to investigate and analyze the shape of the earth using observations of gravity acceleration. The natural and physical shape of the earth is the shape of the surface of the oceans under the effect of gravity and centrifugal force; This defined surface is an equipotential surface called the geoid. This surface is a complex and irregular surface due to the heterogeneous distribution of mass inside the earth and on its surface. At first glance, the earth can be considered a sphere with an average radius of 6371 km. But we know that the earth’s sphericity is not perfect, but the earth has a slight depression at the poles. Its equatorial radius is 6378 km and its polar radius is 6356 km.
In the first section of this project, we estimate the radius of the earth at 12 points by assuming that the earth is spherical and by observing 12 stations. According to this assumption, we expect the radius to be equal at all points, but we get the opposite result. According to the latitudes of the stations, as we get closer to the lower latitude, the radius of the earth increases. (due to the elliptical shape of the earth and centrifugal force).
In the second part, the acceleration of gravity is calculated from other interfaces. The above-mentioned project is available through the following link: