Posted by Graham Relf at 07:38 on 2012 Apr 30
Using Google I found, as I expected, that it is available from le Centre des Donnees at Strasbourg. See http://cdsarc.u-strasbg.fr/viz-bin/Cat?cat=I%2F315& The huge number of files (over 2Gbytes total) can be downloaded via the FTP tab on that page. However Googling also led to something which suggests that Astrometrica simply gets small amounts of data as required by HTTP requests to Vizier (also part of the Strasbourg site) so it should not be necessary to download the full data set.