A motion capture system comprising: at least four relatively positioned locating units defining an area; an RFID fiducial moving with a movable object within the vicinity of said defined area; said locating units receiving RF signals transmitted by said RFID fiducial; and a processing unit in communication with said locating units and said RFID fiducial, said processing unit transmitting RF signals to said RFID fiducial and receiving information from said locating units in response to said transmitted RF signals and determining a location of said RFID fiducial.