Empress Replication E mpress Software announces the latest addition to the EMPRESS RDBMS product family, the Empress Replication Server. Empress Replication is a powerful product that provides local access to enterprise data, allowing users to distribute data from one source to one or more targets.     Empress Replication is used for creating a set of tables as replicates of a single master table and their sychronization to the master table.     Among the most important advantages of Empress Replication are higher data availability, improved performance of data access, distributing the load of data access across several sites, and increased reliability of data.     The table below illustrates a sample scenario of a master table and two replicate tables. The master table is an updateable database that serves as the source of data for the replicate tables which are read-only. Via synchronization, all data updates are made to the master table and propagated to the replicate tables. See "Technical Support Corner" on pg 3 for Empress Replication example.

Orbital's SeaStar Satellite, controlled by MAESTRO, images the Earth's oceans and land surfaces The Master At Orbital S atellite technology is steadily increasing in sophistication, from local satellites used in mobile communication and digital television services, to more far reaching satellites to probe outer space and collect high resolutions images of Earth and our solar system.     Orbital Sciences Corporation, a leading supplier worldwide of satellites and satellite services, develops MAESTRO, a command and control system used to test satellites and flight hardware components. It is designed for use by satellite integrators and operators to assist humans with satellite commanding while processing and displaying information from the satellite and ground equipment.     MAESTRO provides close validation and verification of satellite systems through all stages of the satellite life cycle. Before components attach to the main structure, they must undergo bench-testing. In the integration phase, all individual hardware pieces are checked to ensure proper integration and communication with each other. And MAESTRO is used for the final system checkout and launch preparation to fly the satellites in final orbit.     The compact MAESTRO system utilizes less than 50 MB of disk space for executables and support files. It uses the EMPRESS RDBMS powerful database engine to log, collect and archive all user entries, ground status information and satellite data values for subsequent playback and analysis. Users and hardware connect from geographically diverse sites both on the ground and in orbit with use of MAESTRO's TCP/IP based functions. continue on page 2.

For information on the products or companies covered in this newsletter, please contact Empress Software by telephone, fax, or e-mail, using any of the numbers listed below:

Empress Software Inc. 6401 Golden Triangle Drive Greenbelt, Maryland USA 20770 Tel: (301) 220-1919 Fax: (301) 220-1997 E-mail: sales@empress.com

Empress Software Inc. 3100 Steeles Avenue East Markham, Ontario Canada L3R 8T3 Tel: (905) 513-8888 Fax: (905) 513-1668 E-mail: sales@empress.com