Last Updated Jan 2001
Copyright © 2001 The Association of Universities for Research in Astronomy, Inc. All Rights Reserved.
COMPASS is an object oriented database designed for the production of the second generation Guide Star Catalog (GSC-II). The database project is a collaborative effort between the Space Telescope Science Institute, USA and the Osservatorio Astronomico di Torino, Italy.
It will contain approximately two billion stars,
galaxies, and other objects based on measurements of about 6000 sky survey
plates. The data consists of:
The object-oriented schema is built upon the commercial database, Objectivity, using a C++ binding for persistent objects. COMPASS storage hierarchy is based on 32768 sky areas, i.e. region databases, with links to a separate Plate database. The sky tessellation has been selected as part of a proposed community effort to construct a common partitioning of the celestial sphere. The intent of the common partitioning scheme is to ensure large-scale astronomical databases remain as interoperable as possible.