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1 2005

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An attempt to define the scope of reliable functionality of Ethrog`s diagnostics in geodetic networks

Kwaśniak M., Kościk P.

Reports on Geodesy

2005

z. 3/74

91-102

The paper presents Ethrog`s method of finding errors in observation systems. The method is based on the results of preliminary adjustment made by the least squares method. In the geodetic milieu it`s not very popular but after comparing various methods it can be consudered one of the most effective. Its additional advantage is it`s intuitive approach to the problem and simple calculation formulas. In the course of a detailed analysis of the method`s effectiveness it was found that in networks with diverse values of inner reliability indices, even undisturbed observations can be suspected of gross errors. The paper presents the results of additional research on Ethorg`s method, its aim being to define the scope of its reliable functioning. The paper also contains numerical examples illustrating how the method functions and how effective it`s.