By Urs Marti
This quantity contains a choice of papers offered on the IAG overseas symposium "Gravity, Geoid and top platforms 2012" (GGHS2012), which was once geared up via IAG fee 2 “Gravity box” with the help of the overseas Gravity box provider (IGFS) and GGOS subject matter 1 “Unified international top System”. The booklet summarizes the most recent effects on gravimetry and gravity networks, worldwide gravity box modeling and functions, destiny gravity box missions. It offers a close compilation on advances in particular neighborhood and local high-resolution geoid modeling, the institution and unification of vertical reference structures, contributions to gravity box and mass delivery modeling in addition to articles at the gravity box of planetary bodies.
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Extra info for Gravity, Geoid and Height Systems: Proceedings of the IAG Symposium GGHS2012, October 9-12, 2012, Venice, Italy
Another possibility is brute-force error propagation of the provided orbit VCMs. , only diagonals of the VCMs), and (iii) four epoch-wise full VCMs, providing the epoch-wise 3 3 VCMs including full correlations with four points before and after the actual orbit point. It is expected that the EDF(1s) provides a better approximation of accelerations than the EDF(30s) since a denser sampling is used for the differentiation. In Fig. 1 a simulated noise-free 1s-sampled GOCE-orbit over a period of 1 month is analyzed by means of both EDFs.
R;c/ should be of same orders, efficient recursive computation of base functions). 3 Estimation of Data Weights As mentioned within Sect. 2, the implemented method should be in-core, thus the individual computed NEQs No are not stored on disk, instead they are directly added to N. Thereby it is avoided that the number of observation groups is a limiting factor. g. O D 50 observation groups would result in at least 50 TB disk space for the test scenario of spherical harmonic d/o 720, just to store No , for o 2 f1 : : : 50g.
The second class of GEGMs consists of combined satellite-only models, which are computed by merging individual satellite-only models. Such combinations can be computed rigorously under the assumptions that the covariance matrices of the estimated spherical harmonic coefficients for each of the individual models reflect their true error characteristics and that the relative weighting can be determined correctly. g. van Loon and Kusche 2005; Mayer-Gürr et al. 2010 concerning GRACE, and Schuh 2003; Schuh et al.
Gravity, Geoid and Height Systems: Proceedings of the IAG Symposium GGHS2012, October 9-12, 2012, Venice, Italy by Urs Marti