Earth, and the Earth’s rotation. In geophysics, our task is to measure, characterize, and interpret the gravity signal, and the reduction of gravity data is a very importa

Natural Earth Vector (NEV) is a public domain, vector dataset available at 1:10, 1:50, and 1:110-million scales. At NACIS 2009 in Sacramento, the goal is to give cartographers an of-the shelf …

Consider this equation for two locations, one on the surface of the earth and the second at a height h above the earth. It is the difference in potentials that we need.

From the earth, the ecliptic plane is defined by the apparent motion of the sun about the earth. Determined by the location of eclipses (hence the name). In heliocentric coordinates, ˆx is …

At sea, the surface of the ocean corresponds to the geoid. Changes in mass distribution within the Earth cause changes in the height of the geoid, so there are literally changes in the height of …

This is Brun's formula that relates the disturbing potential to the geoid height N. Reference gravity and gravity anomaly The reference gravity is the value of total (scalar) acceleration one would …

In general the gravity signal has a complex origin: the acceleration due to gravity, denoted by g, (g in vector notation) is influenced by topography, as-pherical variation of density within the …