Gravity gradiometry is the study of variations (anomalies) in the Earth's gravity field via measurements of the spatial gradient of gravitational acceleration.

Gravity-gradient stabilization or tidal stabilization is a passive method of stabilizing artificial satellites or space tethers in a fixed orientation using only the mass distribution of the orbited body and the gravitational field.

Gravity gradient attitude stabilization is defined as the alignment of one axis of a satellite along the earth's local vertical direction so that a particular end of the satellite always faces in the downward direction.

Gravity is described by a potential (xi, t), which is an unobservable. Its first spatial derivatives form a vector: gi - / xi. This gravitational field is indistinguishable from a platform acceleration by the Equivalence Principle.

2006年8月1日 · This paper is a minitutorial on gravity gradients and is designed to provide a simple explanation of the complex pattern of GG anomalies and suggest some guidelines for the interpretation of...

2021年1月1日 · Gravity gradiometry has a long and varied history of static (ground-based), shipborne, airborne, and spaceborne measurement systems. This entry includes the mathematical foundations and properties of gradients starting with Newton’s law of gravitation.

In order to analyze the situation, one need to consider non-inertial coordinate frame. Either rotating in case of space station or constantly accelerating in case of vertical free fall. In both situations there will be gravity force + an inertial force.

In particular, space-borne gradiometers were proposed for gravitational mapping of planets and moons. critical for partial tensor gradiometers and FTGs that are not true full tensor gradiometers. They are modulated at twice the rotation rate, Ω, of the sensor disk. Airborne Gradiometry - BHP FalconTM (Fugro ... ...

2012年4月24日 · The gravity gradient is a symmetric, trace-free, second rank tensor field. In Cartesian coordinates, it can be represented as a 3x3 matrix, with the elements of the matrix consisting of the nine second-order spatial derivatives of the gravitational potential.

This anomalous horizontal gravity gradient gives immediately the direction and magnitude of greatest variation in the gravity anomalies along U = const referred to V = const.