Concepts involved in the estimation of target quantities and other adjustment parameters are critically discussd. We point out that one can find more accurate precepts for the reduction of data by utilizing all available constraints on all available data in the derivation of the reduction precepts. We introduce a measure for theefficiency of a set of adjustment parameters such that adjustments carried out using different precepts can be objectively compared. Finally, having applied our suggestions to a specific problem, we show that we have obtained estimates of a set of target quantities (in our case, star positions and proper motions) which have smaller formal errors than estimates of the same target quantities derived from the same input material but following traditional procedures.
KeywordsSpecific Problem Adjustment Parameter Formal Error Proper Motion Input Material
Unable to display preview. Download preview PDF.
- Bien R., Fricke, W., Lederle, T., and Schwan, H. 1978. Veröff. Astron. Rechen-Institut Heidelberg No. 29.Google Scholar
- Brosche, P. 1966. Veröff. Astron. Rechen-Institut Heidelberg No. 17.Google Scholar
- Brown, D. C. 1955. Ballistic Research Laboratories Rept. No. 937. Aberdeen Proving Grounds, Maryland.Google Scholar
- Corbin, T. 1977. The Proper Motion System of the AGK3R. University Microfilms, Ann Arbor (Dissertation, University of Virginia)Google Scholar
- Eichhorn, H. 1982. in: Automated Data Retrieval in Astronomy, p. 103. C. Jaschek and W. Heintz (eds.). Dordrecht.Google Scholar
- Eichhorn, H. and Williams, C. A. 1963. Astron. Journ.68, 221.Google Scholar
- Schwan, H. 1977. Veröff. Astron. Rechen-Institut Heidelberg No. 27.Google Scholar