Comparisons and Combinations of Geodetic Parameters Estimated from Dynamic and Geometric Satellite Solutions and from Mariner Flights
The use of data from different sources for estimating geodetic parameters serves dual purposes — one of comparison, to obtain realistic accuracy estimates for the individual solutions and to resolve any inherent biases in these results, and one of combination, to obtain the most complete and reliable set of parameters. In this solution three sources of data are combined: the recent SAO dynamic and geometric solutions and the recent Jet Propulsion Laboratory solution from Mariner IV and V missions.
The success of the dynamic solution depends in part on the ability to separate the residuals between observed satellite positions and positions computed from orbital theory into components due to station position errors and due to neglected or incorrect non-zonal harmonic coefficients. The combination of the first two data sets is obviously important for this purpose. The comparison and combination of this satellite solution with the JPL solution is important as the two are essentially independent. Comparison of the individual solutions against the combination indicates that the SAO Baker-Nunn stations coordinates are determined with an average accuracy of 10 m or better relative to the earth’s mass center.
KeywordsDynamic Solution Satellite Solution Geometric Solution Combination Solution Geodetic Parameter
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