Contribution Analysis of the Gravity Field Recovered from Goce
نویسندگان
چکیده
Gravity field modeling in the case of GOCE is based on a combination of the SST contribution for the low wavelength part and on gravitational gradiometry for the spatial details. The gradiomter part of the solution is derived from a combination of the gradient components Vxx, Vyy, Vzz. Variance components in the domain of spherical harmonics allow the analysis of the characteristic contribution of each of these groups of measurements. In the space domain, the comparison between partially combined solutions and the fully combined solution shows the functional behavior, corresponding to the error characteristics of the individual components. Our preliminary results show that the performance of GOCE is higher than that of GRACE for the coefficients higher than about degree 145. The posteriori estimation of the variance components indicates that the performance of the gradiometer meets the requirements.
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