The ED87 Adjustment |
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| Authors: | Walter Ehrnsperger |
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| Institution: | (1) Bayerische Kommission für die Internationale Erdmessung, Bayerischen Akademie der Wissenschaften, Marstallplatz 8, W-8000 München 22, FRG |
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| Abstract: | Summary Following the introduction to the RETrig project and its history, the data included in the adjustment, as well as some test procedures concerning the data are, presented. Then the formulae for the combined solution of terrestrial and space data, originally published by Wolf, but used for the ED87 with modifications, are outlined. The resulting coordinate set was approved by the IAG as the European Datum 1987 (ED87). The strength of the figure is investigated by relative error ellipses between selected points. Finally, the first iteration of the numerical solution resulting in shifts for the ED87 coordinates is presented. This article is a résumé of the final report of ED87 calledthe ED87 Coordinates, Ehrnsperger (1989). |
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