科研之友
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摘要
A method for determining vertical gradients of gravity by observations of the FG5 absolute gravimeter is presented in this paper. The vertical gradients are compared with that from high-accuracy relative gravimeters. The colored noises in the observations are detected in the distance residuals stacked from numbers of free-fall drop experiments. A new algorithm is proposed to solve vertical gradients of gravity by modeling the colored noises and choosing a fitted period of drop time based on the model residuals. This method has been used to process observations derived from the FG5-214 instrument at two stations. And the results from this approach are much better than that calculated by the existing methods, in which no consideration of the colored noises is taken and the period of drop time is chosen according to experiences.
