Abstract At this time it is not likely that the atmospheric limit on the ultimate accuracy of ground based astrometric observations has been reached. There is little doubt, however, that this limit will be reached sooner or later by the new interferometric techniques. Thus, future improvements in the accuracy and magnitude limits of astrometry will require observational capabilities in space. Astrometry is used in a general sense here, including observations of stellar diameters, parallaxes, binary star orbits, large-arc measurements and relative positional determinations for whatever purpose. Various proposals have been made by the astrometric community to provide such observations from space based efforts. A few of these, such as the Precision Optical Interferometer In Space (POINTS) and the Optical Space Interferometer (OSI) will be described. Recently, the concept of “space” observing capabilities has been enlarged to include lunar facilities. This latter topic will be discussed briefly.
Review of projects in space astrometry
Advances in Space Research ; 11 , 2 ; 143-150
1991-01-01
8 pages
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
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