Follow-Up Detection Device (FUDD)

A Follow-Up Detection Device (FUDD) is a stand-alone subsystem of the Targeted Search System used in Project Phoenix and, previously, in the targeted portion of NASA's High Resolution Microwave Survey. It consists of a box of electronics which intensively analyzes, at high resolution and sensitivity, any candidate signal that is picked up, while the telescopes involved in the search continue with their next set of observations. Identical FUDDs at the main antenna site and a remote antenna site enable a signal to be confirmed as extraterrestrial in origin.