During

gravity field and geoid model computation it became evident that the density of GSE gravity data distribution was higher than needed in geoid determination and caused computational burden in data processing.

In this study, we adopt the latter method in which the existing

gravity field models are selected as reference models to be improved.

Jekeli, C.: 1981, Alternative methods to smooth the Earth's

gravity field. OSU Report Series, 327, 48 pp.

We have set: [rho]' = [rho] + [t.sub.gravity] because we consider a stationary

gravity field (in a general case, the

gravity field is "dragged" along with the mass and [rho]' = [rho] + [t.sub.gravity] no longer holds).

Figures 8(a) and 9(a) show the

gravity field variations along profiles A and B, respectively.

Regarding more engineering-oriented aspects, knowledge of the lunar

gravity field directly affects spacecraft orbit determination (OD) and orbit propagation (OP) knowledge.

With this Resolution, it is recognizcd the importance of a globally-coordinatcd approach to Geodesy: the science focused on accurately measuring the shape, rotation and

gravity field of planet Harth.

The Earth's

gravity field affects precise levelling.

He said that as the spacecraft flies by Enceladus, its velocity is perturbed by an amount that depends on variations in the

gravity field that we're trying to measure.

Using data from NASA's GRACE satellite, which measures changes in the Earth's

gravity field, the scientists were able to calculate the way in which mass on the surface has been redistributed as ice has melted from ice sheets and glaciers.

(1) Initialize [c.sub.0] = [[0 1 0 1 0 -[R.sup.2]].sup.T] and [P.sub.0] = 1000 x [I.sub.6], where R is the magnitude of earth's

gravity field or magnetic field and [I.sub.6] is the six-order identity matrix.

[1] investigated propagation of Rayleigh waves in generalized magnetothermoelastic orthotropic material under initial stress and

gravity field. Thermal stresses in an infinite circular cylinder have been investigated by Abd-Alla et al.