Patent ID: 6816106
Filing Date: 2004-11-09
Classification: G01S

Abstract:
A surveillance system, comprising:at least one surveillance unit; at least one Identificationâ€”Friend or Foe (IFF) unit located on at least one object; and at least one processing facility; said at least one surveillance unit transmits surveillance signals to all objects within a surveillance area, and upon receipt of a reflection of said transmitted signals determines locations of said objects and communicates said determined locations to said at least one processing facility; said surveillance signals that impinge on said at least one IFF unit on at least one object cause said IFF unit to broadcast messages containing identification and position information of said object having said IFF unit to said at least one processing facility; said processing facility compares said broadcast messages from said IFF units and the communications from said at least one surveillance unit to determine all properly authorized locations of all objects within a surveillance area and to provide appropriate notice.