Tracking device
April 19, 2021. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent ReferencesRelative guidance using the global positioning system SATPS mapping with angle orientation calibrator Portable locating system Map-matching with competing sensory positions GPS-based automatic target reporting and finding network and components Self-surveying relative GPS (global positioning system) weapon guidance system Differential GPS receiver system linked by infrared signals Personal tracking and recovery system GPS relative position detection system Apparatus and method using relative GPS positioning for aircraft precision approach and landing InventorAssigneeApplicationNo. 837979 filed on 04/19/2001US Classes:342/357.08Determining relative position (e.g., distance or direction)ExaminersPrimary: Tarcza, Thomas H.Assistant: Mull, Fred H Attorney, Agent or FirmForeign Patent References
International ClassesG01S 005/02H04B 007/185 AbstractA tracking system includes a target unit having a GPS receiver, a signal transmitter to send a signal including a position of the target unit; and a processor to calculate an optimal time interval for transmission of the signal. A locating unit has a GPS signal receiver, a compass to provide a reference direction of the locating unit, a signal receiver to receive the signal sent by the transmitter of the target unit, a processor to calculate a range and bearing from the locating unit to the target unit, and an indicator to display the range and bearing. In certain preferred embodiments, the processor calculates a confidence level indicating the reliability of the signal being sent. | |
