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- W2003166618 abstract "Abstract. In the course of the GOCE satellite mission, the high-low Satellite to Satellite Tracking (SST) observations have to be processed for the determination of the long wavelength part of the Earth’s gravity field. This paper deals with the formulation of the high-low SST observation equations, as well as the methods for gravity field recovery from orbit information. For this purpose, two approaches, i.e. the numerical integration of orbit perturbations, and the evaluation of the energy equation based on the Jacobi integral, are presented and discussed. Special concern is given to the numerical properties of the corresponding normal equations. In a closed-loop simulation, which is based on a realistic orbit GOCE configuration, these methods are compared and assessed. However, here we process a simplified case assuming that non-conservative forces can be perfectly modelled. Assuming presently achievable accuracies of the Precise Orbit Determination (POD), it turns out that the numerical integration approach is still superior, but the energy integral approach may be an interesting alternative processing strategy in the near future.Key words. High-low SST – gravity field – GOCE – variational equations – least squares adjustment" @default.
- W2003166618 created "2016-06-24" @default.
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- W2003166618 date "2003-07-11" @default.
- W2003166618 modified "2023-09-30" @default.
- W2003166618 title "Assessment of two methods for gravity field recovery from GOCE GPS-SST orbit solutions" @default.
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- W2003166618 doi "https://doi.org/10.5194/adgeo-1-121-2003" @default.
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