FDS stands for "Flight Data System." It is the name for the internal clock on Voyagers 1 and 2. Most Voyager observations, including images, are identified by the FDS clock time when the observation took place. Within any planetary encounter, FDS counts are unique and increase with time. However, the FDS clock was reset after the Saturn and Uranus encounters, so FDS values are sometimes re-used for different planets. Back to the .
Federated database system. A federated database system is a collection of independently managed, heterogeneous database systems that allow partial and controlled sharing of data without affecting existing applications. An FDS presents an enterprise view of data.